G-GSM BSS Swap Guide-20060430-A-1.0.doc

GSM BSS Swap Guide-20060430-A-1.0 For internal use only

Document

number

Product

numberGSM BSS

Intended forGBSS engineers and

GSM RNO engineers

Product

version

Edited for GSM Product/RNO GEODocument

number

GSM BSS Swap Guide

Prepared byChen Xinting, Yang Jie,

Fan Kai, and Yi HongweiDate 2006-03-02

Reviewed by Si Fazhong, etc. Date

Reviewed by Date

Approved by Date

Huawei Technologies, Co., Ltd.

All rights reserved

2023-04-27 HUAWEI Confiential Page 1 of 117

GSM BSS Swap Guide For internal use only

Revision RecordData Revision Version Version Description Author

2006-02-22 V1.0 Initial Version Chen Xinting, Yang Jie, Fan Kai, and

Yi Hongwei

2023-04-27 HUAWEI Confidential Page 2 of 117

GSM BSS Swap Guide-20060430-A-1.0 For internal use only

Table of Contents

Chapter 1 Swap Principle and Strategy..............................................................................................81.1 Huawei Network Swap Experience...........................................................................................81.2 General Swap Principle...........................................................................................................91.3 Swap Implementation Strategy.................................................................................................91.4 Swap Procedure...................................................................................................................... 9

Chapter 2 Network Information Collection and Evaluation..............................................................132.1 Network Information Collection.............................................................................................13

2.1.1 Basic Information of the Original Network...................................................................132.1.2 Basic Needs and Functions of the Original Network.......................................................182.1.3 Basic Equipment Information of the Original Network...................................................192.1.4 RNP Data of the Original Network...............................................................................232.1.5 Core Network KPI of the Original Network..................................................................252.1.6 Transmission Networking Information of the Original Network......................................262.1.7 Power Supply Configuration of the Original Network....................................................282.1.8 Abnormal Network Information and Customer Complaints.............................................292.1.9 Customers’ Engineering and Maintenance Capability.....................................................292.1.10 Acceptance Information............................................................................................30

2.2 Analysis and Evaluation of the Original Network.....................................................................302.2.1 DT Evaluation............................................................................................................302.2.2 Network KPI Evaluation.............................................................................................312.2.3 Other Evaluations.......................................................................................................322.2.4 Confirmation of the Acceptance Indicators after Network Swap......................................36

Chapter 3 Project Survey, Equipment Installation and Test.............................................................363.1 Survey and Design................................................................................................................36

3.1.1 Survey of BSC/PCU Room.........................................................................................373.1.2 BTS Survey...............................................................................................................393.1.3 M2000 Survey...........................................................................................................433.1.4 Project Design............................................................................................................44

3.2 Hardware Installation............................................................................................................453.2.1 Goods Preparation......................................................................................................453.2.2 BSC Installation.........................................................................................................463.2.3 Huawei PCU Installation.............................................................................................463.2.4 BTS Installation.........................................................................................................463.2.5 M2000 Installation.....................................................................................................483.2.6 Removing the Equipment of the Original Network.........................................................48

3.3 GBSS Test........................................................................................................................... 483.3.1 BSC Test Points.........................................................................................................483.3.2 CDB/CBC Test..........................................................................................................493.3.3 PCU Test................................................................................................................... 503.3.4 BTS Test................................................................................................................... 513.3.5 M2000 Test...............................................................................................................523.3.6 Equipment Function Acceptance..................................................................................53

Chapter 4 Network Swap Planning and Network Parameters...........................................................544.1 Network Swap Planning........................................................................................................54

4.1.1 Whole Network Planning............................................................................................544.1.2 Network Swap Planning Data Design...........................................................................574.1.3 RNP Data Review......................................................................................................61

4.2 Network Interconnection Parameter Confirmation....................................................................614.2.1 A-interface Interconnection Parameters........................................................................614.2.2 Gb-interface Interconnection Parameters.......................................................................63

4.3 Customer Suggestion............................................................................................................64

2023-04-27 HUAWEI Confiential Page 3 of 117


Chapter 5 Network Swap Preparations............................................................................................655.1 Network Swap Solution Design and Review............................................................................65

5.1.1 Overall Swap Solutions...............................................................................................655.1.2 Designing and Reviewing the Solutions Used to Swap Network Elements........................655.1.3 Swap Plan and Customer Confirmation.........................................................................66

5.2 Network Swap Preparations...................................................................................................665.2.1 Coordination Meeting and Customer Cooperation..........................................................665.2.2 Integration Difficulty Analysis and Emergency Measures...............................................675.2.3 Personnel Arrangement, Vehicle Arrangement, Test Tool, Installation Tool, Equipment Preparation, and Emergency Measure....................................................................................675.2.4 Version Confirmation and License Application.............................................................705.2.5 Swap Data Design and BTS Swap Preparation..............................................................715.2.6 Pre-integration...........................................................................................................73

Chapter 6 Swap Implementation.....................................................................................................756.1 Network Integration on the Swap Day.....................................................................................75

6.1.1 Network Integration Schedule......................................................................................756.1.2 Checking Each Network Element (Before Integration)...................................................776.1.3 BSC Integration.........................................................................................................786.1.4 MSC-Related Work during BSC Integration..................................................................796.1.5 BTS Integration..........................................................................................................806.1.6 PCU Integration.........................................................................................................84

BSC overall performance measurement............................................................................................84G-Abis interface performance measurement.....................................................................................84Pb interface performance measurement............................................................................................84

6.1.7 Network Optimization Arrangement.............................................................................856.2 Emergency Measures and Changback for Network Integration..................................................85

6.2.1 Emergency Measures..................................................................................................856.2.2 Changeback Principle Description................................................................................866.2.3 Changeback Measures................................................................................................87

6.3 Network Monitoring on the Day Next to Swap.........................................................................87

Chapter 7 After-Swap Network Quality Monitoring and Optimization.............................................887.1 Online Equipment Problem Handling......................................................................................88

7.1.1 Hardware Problem Handling.......................................................................................887.1.2 Complaint Handling...................................................................................................897.1.3 Alarm Analysis..........................................................................................................89

7.2 Network Monitoring and Optimization....................................................................................907.2.1 OMC Traffic Statistics Analysis...................................................................................907.2.2 Analysis of NSS-Related Radio Indicators....................................................................927.2.3 Analysis of Area DT and CQT and Related Suggestions.................................................937.2.4 After-Swap Network Maintenance...............................................................................937.2.5 Network Optimization................................................................................................93

7.3 Customer Communication.....................................................................................................94

Chapter 8 Swap Acceptance and Document Transformation............................................................948.1 Preliminary Acceptance.........................................................................................................948.2 Network Performance Acceptance..........................................................................................948.3 Document Transformation.....................................................................................................95

Chapter 9 Swap Risk Analysis.........................................................................................................959.1 Network Information Collection and Risk Evaluation...............................................................95

9.1.1 Risks Caused by Inadequate Understanding of the Performance of the Original Equipment959.1.2 Risks Caused by Inaccurate Information.......................................................................959.1.3 Case Study................................................................................................................96

9.2 Project Survey, Equipment Installation and Commissioning......................................................989.2.1 Interconnection Risks.................................................................................................989.2.2 Problems Related to Interconnection of GBSS and G9...................................................989.2.3 Risks Concerning BTS Survey.....................................................................................989.2.4 Quality Risks Caused by Project Installation Team’s Engineering Level..........................99



9.2.5 Version Risk..............................................................................................................999.2.6 Case Study..............................................................................................................100

9.3 Network Planning and Optimization Risk..............................................................................1019.3.1 Risk Related to Network Indicators............................................................................1019.3.2 Coverage Risk..........................................................................................................1029.3.3 Inadequate Test before Swap.....................................................................................1029.3.4 Frequency Planning Risk...........................................................................................1039.3.5 Risk Related to Traffic Volume.................................................................................1039.3.6 Case Study..............................................................................................................103

9.4 BSS Integration and Monitoring Risk....................................................................................1049.4.1 Risk Relate to BSS Integration Solution......................................................................1049.4.2 Risk Related to BTS Pre-integration...........................................................................1059.4.3 Risk Related to Transmission Commissioning.............................................................1059.4.4 Risk Related to BTS Integration.................................................................................1059.4.5 Emergency Problems Related to BSC Integration........................................................1069.4.6 Handling of Abnormal Conditions during BTS Integration...........................................1069.4.7 Case Study..............................................................................................................107

9.5 Acceptance Risks................................................................................................................1089.5.1 Risk Related to Customer Communication..................................................................1089.5.2 Risk Related to Acceptance Test before Integration.....................................................1089.5.3 Case Study..............................................................................................................109

9.6 Non-technical Risk Analysis................................................................................................1099.6.1 Risk Related to Contract Items...................................................................................1099.6.2 Risk Related to Project Duration Risk.........................................................................1099.6.3 Management Risk.....................................................................................................1109.6.4 Risk Related to Communication.................................................................................1119.6.5 Risk Related to Contract Implementation....................................................................1119.6.6 Risk Related to Work Flow.......................................................................................1129.6.7 Case Study..............................................................................................................112

Appendix: Reference Document Catalog and Network Integration Checklist...................................1149.7 Reference Document Catalog...............................................................................................1149.8 Network Integration Checklist..............................................................................................114

9.8.1 BSC Service Test.....................................................................................................1149.8.2 GPRS Dialing Test Checklist.....................................................................................1159.8.3 A-interface Dialing Test Checklist.............................................................................1169.8.4 Abis Interface Dialing Test Checklist.........................................................................1169.8.5 BTS Radio Channel Dialing Test Checklist.................................................................117



GSM BSS Swap Solution (Template)

Key words: swap, integration, GBSS, network optimization

Abstract:

Compared with the swap documents edited before, this document describes the whole swap

procedures based on the swap experience of the current GBSS (the version is BSC32). As with this

version, the focuses are on the introduction of the specific swap implementation from the perspective

of engineering and the differentiation of the engineering scenarios. In addition, this document also

provides the tips on how to control network quality and what should be paid attention to (especially

the coverage and parameters) during swap. Furthermore, this document gives the risk analysis and

related cases for your reference. In a word, this document can help you improve work efficiency,

avoid unexpected problems, reduce technical requirement on engineers, and ensure swap quality.



Preface

What are the characteristics of this document?

Whole swap procedures are described in this document and the focuses are given to four

aspects, including network information collection and evaluation, network optimization,

swap implementation, and risk analysis.

The differentiation of the original network information is available and the information

collected according to the forms provided in this document can meet swap requirement.

Engineering scenarios and detailed swap steps are provided.

Risk analysis and many cases are available.

Delivery according to contract is appreciated.

Control of network swap quality is emphasized.

Swap cases are updated.

How to use this document?Network swap is a systematic project, so it must be implemented according to steps. More

importantly, good planning and network monitoring are necessary.

This document consists of several chapters, but the actual swap process can be divided into

three parts, including network information collection (Chapter 1, 2, and 3), swap

implementation (Chapter 4, 5, and 6), and network monitoring and acceptance (Chapter 7

and 8).

Collecting and evaluating the information of the original network is the most important for a

successful swap. Therefore, the earlier to provide technical service and use this document,

the better for the network swap. Generally, this document must be used after contract

signature but before network swap so that the network information collection and evaluation

can be finished as soon as possible.

The parts for survey, installation and commissioning, and integration preparation are for the

implementation engineers’ reference.

This document can be used as the template of network swap and integration during the

implementation of a swap project.

The parts for RNP and RNO are for the RNO engineers’ reference.

The parts for risk analysis are for project engineers’ reference.

Note:In this document, the “original network” refers to the network need to be swapped but

has not been swapped.



Chapter 1 Swap Principle and Strategy

At present, the GSM technology is mature than ever before, and so is the market competition.

Therefore, GSM network swap, especially the swap of the base station system, will surely become

the trend. The GSM network swap is a complex systematic project for the following

considerations:

Multiple operators’ equipments are involved.

The features of the equipments vary with operators.

The network structure will change after swap.

The quality of the swap implementation must be ensured.

The cooperation of different operators’ equipments must be available.

The RNP and RNO level is a great concern during network swap.

The performance of various equipments may be greatly different in the same geographic

environment.

As a leading GSM equipment provider in the world, Huawei has swapped multiple operators’

networks and has acculturated rich experience. Hereunder lists several examples and gives a

general description of the swap strategies.

1.1 Huawei Network Swap Experience

Huawei GSM system has been widely used in the worldwide. By December 2005, Huawei has

swapped 300, 000 TRXs and more than 50,000 BTSs and the equipments of many world-honored

operators are involved, including Motorola, Siemens, Ericsson, Nokia, Bell, Alcatel, Nortel,

Lucent, etc. Huawei has accumulated rich experience in network swap through these projects,

among which the major projects are listed in Table 1-1.

Table 1-1 Major swap projects implemented by Huawei

Country or region Operator Equipment provider of the

original network

Swap scale

Philippines Digitel Alcatel 5893TRX

Nigeria MTN Ericsson 4795TRX

Liaoning Province Unicom Lucent 6241TRX

Indonesia Indosat Siemens 4552TRX

Sichuan Province China Mobile Ericsson 4505TRX



Colombia Movil Siemens 1300TRX

Guangdong China Unicom Motorola 4405TRX

Zhejiang China Unicom Nortel 870TRX

Fujian Province China Mobile Nokia 3000TRX

Inner Mongolia China Mobile Nokia 1065TRX

Note: Actually, multiple network elements, such as MSC, HLR, and GPRS part, are involved in

GSM network swap. In this case, you should swap the core network part, and then swap the

base station part.

If network expansion and construction should be performed during the swap, you should swap

the network first so that the smooth transition of the network can be ensured.

The network indicators must be consistent with that specified in the contract for delivery.

1.2 General Swap Principle

The swap of the GBSS is the same as that of other network elements and the following four

principles should be followed:

Security

Excellent quality and low cost

Smooth transition

High efficiency

1.3 Swap Implementation Strategy

From the perspective of the effect against the network, the following strategies can be used for

GBSS swap.

Parallel swap

One-time swap

Batch swap (recommended)

Mixed swap

1.4 Swap Procedure

This document introduces the whole swap procedures, including network information collection

and evaluation, equipment installation and commissioning, network swap planning, integration



solution design, swap preparation, integration preparation, after-integration test and optimization,

and swap acceptance. The key tasks are network information collection and swap implementation.

Figure 1-1 shows the whole network swap procedure.





Figure 1-1 Whole network swap procedures



Chapter 2 Network Information Collection and Evaluation

Engineering capability is the key to the success of a swap project. To improve work efficiency and

thoroughly understand customers’ needs, you should collect the related network information

beforehand. This chapter introduces the information needed to be collected before swapping a

network. You can obtain the data through contract review, customer communication, field test, etc.

2.1 Network Information Collection

The following information of the original network must be collected:

Basic information of the network

Basic needs and functions

Basic information on the operation of online equipment

RNP data

Transmission and networking information

Information of power supply configuration

Abnormal network information and customers’ complaints

Customers’ engineering and maintenance capability

2.1.1 Basic Information of the Original Network

I. Network Structure of the Original Network

The network structure of the original network should contain the basic information of the main

equipments, such as the MSC, BSC (PCU), and the overall BTS layout. If packet service is

available in the original network, the information of the packet equipments, such as SGSN and

GGSN, should be included. If the core network needs to be swapped, the basic networking

information of the HLR and MSC should be included. In addition, the description of the

configuration and capacity of the network should also be provided based on the networking

diagram. If possible, you can configure the BTS layout created by MAOINFO.

If you have an all-round understanding of the above information, you can know more about the

total network and see more clearly the order and difficulty of the swap project.

Figure 2-1 shows the schematic drawing of a GSM network.



Figure 2-1 Schematic drawing of a GSM network

In the urban area of XX city, the operator S has 2 MSCs. MSC1 can accommodate 270,000 users

and has 5 BSCs. They are S BSC2, S BSC5, S BSC 6, S BSC 12, and Huawei BSC2, responsible

for the covering eastern XX district, XX district, and XX road. MSC2 can accommodate 300,000

users and has 6 BSCs. They are S BSC4, S BSC7, SBSC8, S BSC11, S BSC20 and SBSC4,

responsible for covering XX district and XX road.

In the urban area of XXX city, there is 1 Huawei MSC. MSC4 can accommodate 270,000 users

and has 6 BSCs. They are S BSC1, S BSC3, S BSC10, Huawei BSC1, Huawei BSC5, and Huawei

BSC6, responsible for covering XX district and XX road.

II. Configuration Information of the Original Network

The configuration information of the original network includes equipment configuration

information, capacity information, provider information, BSC home information, BTS number

under BSC, TRX number, etc. For details, see the following two tables.

Table 2-1 MSC information in XXX city

No.

Equipment

Name

Original

Capacity Operator Version BSC Carried

1 MSC1 270,000 S SR9 BSC2, 5, 6, 12, HWBSC12

2 MSC2 300,000 N SR9 BSC4, 7, 8, 11, 20, HWBSC4

3 MSC4 270,000 Huawei G6 BSC1, 3, 10, HWBSC1, 5, 6

4 MSC3 220,000 E R12 BSC9, 13, 14, 18, 19, HWBSC3

Table 2-2 BSC information in XXX city

No. BSC Operator BTS number TRX Coverage area LAI



Name number

1 SBSC12 S 44 197

2 HWBSC2 Huawei 47 317

3 HWBSC4 Huawei 30 220

III. OMC Networking Diagram and Network Management System Information

For the networks large in size and the network elements are distributed in vast areas, the OMC

networking is often complex. In this case, multiple routers and switches are needed for

communication. Sometimes the original semi-permanent connection equipment or timeslot

insertion equipment can be used for the networking. Therefore, you are suggested to collect the

OMC networking diagram of the original network. If the original OMC networking is simple and

all the equipments are concentrated in a place, you can use simple local area network for TCP/IP

communication. But before that, you should understand the composition of the local area network.

In a word, it is a must for you to understand the original network management information and the

accessibility of the third party’s equipments.

Before swapping a network, you should have an overall understanding of the following contents:

The topology of the network

The accessibility of the third party’s equipments for alarming and traffic statistics

The formats and interface standards of the original traffic statistics and alarming data

(Generally, TCP/IP is used for data connection and FTP is used for data transmission)

The types of the wide area network, including ISDN, DDN, X.25, frame relay, etc.

The components of the network, including HUB, exchange, router, ATM exchange, WAN

exchange, access server, timeslot integration equipment, etc.

The performance of the network, especially the indicators about bandwidth and delay.

Figure 2-1 shows the OMC networking diagram used in XXX area.



Figure 2-1 The OMC networking diagram in XXX area

IV. Traffic Model of the Original Network

The traffic model of the original network should be collected.

Traffic model is the basic data for network capacity planning. Generally, the total network

capacity is predicted according to mathematic models. First the traffic model is used to calculate

the traffic volume of the system, and then the structure of the PLMN can be used to estimate the

traffic volume present of interface, while the traffic volume of each interface can be used to

decide the configuration of the voice circuits and signaling links at the interfaces. Finally, the

TRX channel configuration of the base station can be decided.

Traffic model will be greatly affected by social environment, economy, and main user groups and

will change with the growth of user number. Customers’ RNP departments are responsible for

providing the traffic model, so there is no unified standard. At present, the traffic model for voice

service is mostly emphasized.

Table 2-1 introduces the traffic model for the voice service of a domestic GSM network.

Table 2-1 Traffic model for GSM voice service (a domestic GSM network)

Item Traffic model-1 Traffic model-2

Busy-hour Erlang per subscriber 0.018 0.018

Average call hold time 48 48

Calling mobile subscribers 39 39

Called mobile subscribers 57 57

Calls made by each mobile subscriber at busy

hour1.35 1.35

Call connected ratio 80% 80%



Mobile subscriber location update at busy hour 1.21 2.61

Secondary page ratio caused by called mobile

subscriber20% 20%

Handovers for each call made by mobile

subscriber1 1.7

Short messages send by each mobile subscriber

at busy hour128 100

Short messages received by each mobile

subscriber at busy hour384 211

Ratio of mobile subscribers roaming inside to

total mobile subscribers10% 10%

Ratio of mobile subscribers roaming outside to

total mobile subscribers10% 10%

Mobile subscriber activation ratio 100% 100%

Traffic distribution

Mobile-Mobile 40% 40%

Fix-Mobile 36% 36%

Mobile-Fix 24% 24%

Table 2-2 introduces the traffic model for the voice service of a foreign GSM network.

Table 2-2 Traffic model for GSM voice service (a foreign GSM network)

Parameters Value Remark

Average Call Hold Time 72s –

Erlang per Subscriber 0.02 –

BHCA 0.5MO+0.5MT –

Mmobile to Mobile 60% –

Mobile to Other PLMN – –

Mobile to PSTN 20% –

PSTN to Mobile – –

SMS Numbers/BH/SUB(MO) 1 –

SMS Numbers/BH/SUB(MT) 1 –

Ratio of IN subscribers 95% –

location update numbers/BH/SUB 1.5 –

location update numbers/BH/SUB(to HLR) 0.3 –

Authentication numbers/BH/SUB 0.3 –

Table 2-3 introduces the traffic model for packet data service.



Table 2-3 Traffic model for packet data serviceItem Value Remark

GOS of circuit service 2% For reference

Busy-hour Erlang per subscriber for circuit service 0.03 For reference

GPRS user penetration rate 50.00%

IP layer bandwidth for each (BYTE/s) 2500

Bandwidth for each GPRS channel (BYTE/s) 2000

Busy-hour bandwidth for each GPRS subscriber (bps) 400

GoS of GPRS service 2%

Note:The increase of the SMS will raise the load on the NO.7 signaling link. Therefore, if the SMS

takes a larger ratio, the configuration of the NO.7 signaling link should be adjusted accordingly;

otherwise the SDCCH and NO.7 signaling link will be congested.

V. Customers’ Charging Setting Information

Generally, you can collect the customers’ charging setting information from their market

departments. There information to be collected includes the followings:

Time for free of charge

Some operators set the time for free call. Generally, in this period of time, the traffic volume

will grow rapidly and thus network congestion may be caused.

Monthly fee policies, including monthly fee for the calls made within the same network,

monthly fee for called services, and monthly fee for packet data service.

Charging policies for SMS

2.1.2 Basic Needs and Functions of the Original Network

You should analyze the basic needs and functions of the network according to the technical

proposals made in contracts, especially you should check if the needs and functions that have been

realized in the original network can be realized by Huawei BSS and if they are supported by

Huawei software. If you find any problem, contact the technical supports as quickly as possible.

Table 2-1 lists the basic services and functions of the original network.

Table 2-1 Basic services and functions of the original network

Item Content Remark

Voice version FR EFR HR AMR –



Encryption setting No A50 A51 A52 –

Circuited data service Not support 2.4K 4.8K 9.6K –

TFO Support Not support –

Cell broadcast Support Not support Cell name,

advertisement,

whether reports

LCS Support Not support –

SDCCH dynamic allocation Support Not support –

Mutual aid between main

BCCHs

Support Not support –

MNC digit extension

function

Support Not support –

Concentric cell Support Not support –

CO-BCCH Support Not support –

GS interface Support Not support –

Extended cell Support Not support –

GPRS/EDGE Support Not support –

BSC/BTS intra-exchange Support Not support –

Authentication – – –

Paging mechanism LAC paging LAC and CI

paging

Other paging

2G/3G handover Support Not support –

Acoustic Echo Canceller Support Not support

Noise Suppression Support Not support

2.1.3 Basic Equipment Information of the Original Network

I. GSM Protocol Standard Phase Version

For A-interface, the phase versions are PHASE2+, PHASE2, and PHASE1.



Note:To avoid that some functions cannot be realized normally after interconnection, you should check

the protocol phase version supported by the original equipment if the original network has been

there for a long time. You are suggested to use singling analyzer to collect the messages sent

across the A-interface and Abis interface at busy hour and send them to technical supports for

verification.

II. Software Version Information

Table 2-1 lists the software version information of some network elements.

Table 2-1 Software version information of MSC, BSC, and BTSNo. Equipment Operator Type Software version Remark

1 MSC1 S – SR9 –

2 MSC4 Huawei G6 R003 –

3 BSC2 S – SR9 –

4 BSC1 N – R10 –

5 BTS N ULTRASITE DE21 –

III. BSC Configuration Information

Table 2-1 lists the BSC configuration information

Table 2-1 BSC configuration information

BSC Location OperatorBTS

number

TRX

number

Half rate

TRX

number

EDGE

TRX

number

Coverage

area

Slave

MSC

SBSC12 – S 44 197 100 90

Urban area

1 MSC3

HWBSC2 – Huawei 47 317 231 123

Urban area

2 MSC2

HWBSC4 – Huawei 30 220 125 46

Suburban

area MSC3

IV. BTS Configuration Information

Table 2-1 lists the BTS configuration information.



Table 2-1 BTS configuration information

BTS Location Operator Type

Cell

configuratio

n

TRX

number

Transmission

mode

E1

number

Slave

BSC

BFM

K XX city S R11 S222 6 Micro wave 1 MSC3

KPR

I XX island Huawei 3002C O1 1 Satellite 1 MSC2

CBI

O XXX Huawei 312 S3443 14 Optical fibre 2 MSC3

V. TRX Configuration, Combiner Information, Set-top Power

Table 2-1 TRX configuration, combiner information, set-top powerBTS

TypeOperator

Configurati

onCombiner Type

Combination

ModeCombiner loss

Set-top

Power

A9100 A S666 ANC+ANY 4-to-1 8dB 7.1W

BTS30 Huawei S222 CDU 2-to-1 4.5 dB 21.4W

BTS312 Huawei S666 2CDU+SCU Concentric cellOverlay:8dB;

underlay:4.5dB

Underlay

:21.4W;

Overlay:

9.5W

Note:You are suggested to select the BTSs with typical configuration and perform field verification of

the set-top power. In addition, you should check if the partner has installed the lightening

protector.

VI. Tower Amplifier Information

If the tower amplifier is configured for the original BTS, you should collect the tower amplifier

information, as listed in Table 2-1.



Table 2-1 Tower amplifier information

Specification Operator TypeFrequency

band

Receiver

gain

Working

voltage

Working

current

Power

supply

mode

– – Triplex 900 12dB 12DC 100-200mA

CDU

feeder

– – Duplex 1800 – – – –

– – Simplex – – – – –

VII. Feeder Configuration Principle

The feeders 7/8 and 5/4 are most commonly used. Some operators also use the feeder 18/8.

VIII. BTS Grounding Principle and Feeder Grounding Principle

The BTS grounding principle and feeder grounding principle vary with operators. For example,

the operators in Indonesia have no requirement on feeder grounding, but the operators in Iran do

not allow the feeder to be connected with the tower directly.

IX. Indoor Coverage Distribution System Information

Indoor coverage is used to improve the mobile communication quality for indoor users. The

principle of the indoor coverage system is to use the indoor antenna distribution system to evenly

distribute the signals from the BTS in an indoor environment. At present, the following solutions

are used for indoor coverage.

Repeater + distribution antenna

Macro cell + distribution antenna

Micro cell + distribution antenna

Mini-micro cell + distribution antenna

Mini-micro cell only

You should pay attention to collect the indoor coverage solution used in the original network. If

distribution antenna system is used, you should especially know the feeder configuration principle

of the distribution antenna system and check if there is diversity reception.

X. Repeater Information

The repeater is used in vast areas to cover the indoor dead zones and is the coverage extension of

the surrounding BTSs. The types of repeaters include wireless frequency selection repeater,

optical frequency selection repeater, wireless wide band repeater, and optical wide band repeater.

You should have an overall understanding of the repeaters in the original network and pay special

attention to the repeater location, transmit power, channel number setting, antenna configuration,

etc.



Table 2-1 lists the repeater information should be collected.

Table 2-1 Repeater information

Provider and

specification

Type

Band or

Channel

Selective

Power

Downli

nk

(Uplink

)

Gain

/dB

Downli

nk

(Uplink

)

Noise

Figure

/dB

Downli

nk

(Uplink

)

Order

Intercep

t

/dBm

Downli

nk

(Uplink

)

No.

of

Channe

ls

Size

/mm

AFL GSM 900 Band 1,5,10,20

,25 W

30,50,80,

95

(30,50,8

0,95)

4.5

(4.5)

40,47,50,

54

(40,47,5

0,54)

N/A 460 x

550 x

220

(10W)

Allgon AR 120

GSM 900

Channel 24

(20)

dBm

40-60 <6 2 230 (W)

285 (H)

120 (D)

Mikom MR 340 Channel 32 dBm

(2channe

l)

28 dBm

(4channe

l)

85-89

(2channe

l)

82-86

(4channe

l)

6-8 2

channel

modules

per

cabinet

[2]

425 (W)

255 (H)

110 (D)

XI. Movable BTS Information

Movable BTSs are often installed in the cars or in the containers that can be easily moved. The

satellite or micro wave is used to transmit the signals for movable BTSs, so movable BTSs are

often used in emergent communication situations. You should have an overall understanding of

the configuration information of the movable BTSs in the original network and pay special

attention to the TRX configuration, transmission mode, and antenna configuration.

2.1.4 RNP Data of the Original Network

I. Proejct Parameters

Hereunder lists the project parameter information

BTS information: BTS name, BTS number, BTS configuration, equipment specification



Cell information: cell number, longitude, latitude, CGI, BSIC, frequency band, channel

number, frequency hopping, cell name

Antenna and feeder system: antenna type, antenna gain, polarization mode, half-power

angle, electrical tilt, frequency scope, mechanical tilt, antenna height, azimuth, down tilt,

feeder length, diversity mode.

Environment information: city, height above sea level, collocation site, coverage area (urban

area or suburban area)

For more information, see RPO201-05 project parameter table (G).

II. Radio Parameters of the Original Network Providers and Special Functions

The radio parameters of the original network providers include cell parameter, system parameter,

handover, power control, access parameter, frequency hopping, adjacent cell, etc.

First you should obtain the RNP parameter configuration files used by the original network

providers from the customer, and then use the parameter conversion tool to convert these

parameters into the ones used by Huawei.

For more information, you can consult technical support engineers and related operation guides.

III. Original Network Traffic Statistical Data and KPI Formula

The original traffic statistical files vary with equipment providers, but they can be converted into

excel documents by corresponding conversion tools. Therefore, you can obtain such files from

customer. For cell-level indicators, the busy-hour data in 7 days should be collected. For total

network indicators, you can use the data reported on the customer maintenance day (one month of

data is needed).

Generally, the following KPIs will be contained in a contract:

TCH drop rate

SDCCH drop rate

TCH congestion rate

SDCCH congestion rate

Handover success rate

TCH assignment success rate

Call setup success rate

Call success rate

Paging success rate

Radio quality

These KPIs are obtained from some basic indicators through certain calculations and they reflect

the statistical points used by the original equipment provider. You are suggested to collect the

remark files of the KPI formulas from customers.



IV. Network Planning Principle

For frequency planning principle, you should understand the frequency resource, frequency reuse

pattern, reserved channel numbers, etc.

For cell naming principle, you should understand the composition of cell name, the matching

relationship between cell sequence and azimuth.

For CGI numbering principle, you should understand the matching relationship between the

MCC, MNC, LAC and the areas, and the CI numbering scheme as well.

For BSIC naming principle, you should know the optional scope of the BCC and NCC.

For VIP area, such as the coverage hot-spots, capacity hot-spots, and key organizations, you

should know the related agreements.

For more information, obtain the related documents from the technical support engineers.

V. Channel Configuration

You should know the principles used to configure the CCCH, SDCCH, and PDCH in the original

network. In addition, you should also know the usage of half rate and AMR.

VI. MSC and RNP-related Information

You should collect the following information:

MSC paging modes (paging according to LAC or CGI; TMSI paging, IMSI paging, or mixed

paging; paging times, paging interval; or total network page)

Location update time at the network side

Voice support version

Encryption algorithm selection

Location update success rata and paging success rate

The settings of T305 and T308 have a great effect on call drop rate.

2.1.5 Core Network KPI of the Original Network

I. MSC KPI of the Original Network

The MSC KPI of the original network should be checked. Generally, you can check the following

items:

Subscriber number ratio and intelligent subscriber ratio of the local VLR

Connective rate between MSCs

CPU seizure rate

Traffic volume per line

Traffic load per link

Paging success rate

Location update rate

Inter-MSC handover success rate



Short message sending success rate

Average duration

BHCA

II. PS KPI of the Original Network

The PS KPI of the original network should be checked. Generally, you can check the following

items:

ATTACH success rate

PDP activation rate

Packet paging success rate

Attached subscriber number

Average attach time

Average PDP activation time

III. Maximum Rate for User Subscription

The maximum rate for user subscription is the most important user subscription parameters in

HLR. If the peak throughput for the SIM subscription is incorrectly set, the EDGE rate will be

slow. Hereunder gives an example.

A user complained that the data service of the PCU MSC9 was unstable and the MSC9 rate

ranged from 60 to 70 Kbps (the rate is far slower than the theoretical value) when 3 PDCHs were

activated simultaneously. It is found later that the peak throughput was set to only 8000 octets/s

(64Kbps) for SIM subscription. Therefore, the peak throughput the user can enjoy is 64Kbps

during data transmission. After changing the peak throughput to 64000 Octets/s in the subscription

information, engineers found that the average download rate was increased to 150Kb. Thus, this

problem was solved.

2.1.6 Transmission Networking Information of the Original Network

I. BTS Transmission Networking Information

You should collect the following BTS transmission networking information:

The networking modes in common use, including star networking, tree networking, chain

networking, ring networking, and mixed networking, in which the chain networking and ring

networking should be paid special attention to.

If the operators are responsible for maintaining the transmission network by their own or

they rent other operators’ transmission network.

If the original transmission network has adequate capacity and if another one transmission

line can be added to the original site.

II. E1 Reuse Ratio of the Typically-configured BTS

You should pay attention to the E1 configuration of the BTSs with big configuration and the

maximum TRXs that one E1 can support. Generally, the modes include 10:1, 12:1, and 15:1.



III. E1 Types

Twisted pair (120 Ω) and coaxial cable (75 Ω) are in common use. For the later one, its connector

types include SMB and BNC.

IV. Microwave Transmission Equipment

If microwave transmission equipments are wilily used in the original network, you should focus

attention on checking the bit error and synchronization function of the equipment, the

transmission alarm, and the alarm for clock out-of-synchronization.

V. Optical Fiber Information

Check if the optical fiber is directly connected to the BTS. If yes, the type of the optical fiber and

the type of the connector should be paid special attention to.

VI. Satellite Transmission Equipment

The information about satellite transmission equipment needs to be collected is listed below:

Specifications and types of the satellite transmission equipment (VSAT or satellite

MODEM)

Leased according to bandwidth or timeslot

Interfaces supported (Abis, Pb, Gb, A, Asub)

Stability requirement of transmission (BTS and satellite), average failure time and

interruption time per year)

Circuit accuracy of satellite transmission (bit error rate)

VII. HDSL and SDSL Transmission Equipment

With the help of twisted pair and digital modulation, HDSL and SDSL transmission technologies

can be used to transmit 2M signals. The disadvantage is that the transmission may be easily

interrupted, and thus the BTS cannot necessarily run normally. Considering the cost, some

operators will use this transmission mode. When swapping a network, therefore, you should check

the stability of the transmission equipment used in the original network.

VIII. Timeslot Consolidation Equipment

The timeslot consolidation equipment can enhance the utilization rate of E1. That is, several BTSs

can share 1 E1, or they can also use the E1 of the other network. For a swap project, you should

especially check the allocation of the timeslots.

IX. Transmission Compression Equipment

To save transmission cost, some operators will use transmission compression equipment to

compress the data flow transmitted through E1. Therefore, to ensure that Huawei equipment can

work normally after swap, you need to collect the compression theory, performance restriction,

and compatibility of the compression equipment and send the information to the technical support

engineers. Whether the equipment is compatible with Huawei BSS should be confirmed as early

as possible.



X. BTS Concatention and Transmission Concatention

The information about BTS concatenation and transmission concatenation should be collected,

because the information is used to design concatenation data and decide the BTS swap order.

2.1.7 Power Supply Configuration of the Original Network

Table 2-1 lists the information about the power supply configuration of the original network, and

all the information should be collected.

Table 2-1 Information about the power supply configuration of the original network

Item Content Remark

Voltage of AC power supply – 110V, 220V, 110V (double live line)

Frequency of AC power

supply– 50HZ, 60HZ

AC phase – 3-phase, single-phase

Type of AC socket –English system, European system, American

system

Mains supply –

If the power supply always breaks, the

battery discharge will frequently occur. In

this case, the life expectancy of the battery

will be shortened and the BTS will be out of

service.

Diesel configuration –The power is twice that of the load, in the

unit of KW.

Working hours of the diesel –In the unit of hour, depending on the fuel

configuration.

Capacity of AC power

distribution box– In the unit of KW.

Voltage of DC power – +24V.-48V

Capacity of rectifier – In the unit of KW

Capacity of battery – In the unit of Ah

Feeding duration of battery –In the unit of hour, depending on battery

capacity.

Colour of power cable –

Pay attention to customers’ special

requirements, especially the grounding

cable.

Diameter of power cable –Pay attention to the diameters of the DC

power cables of BSC and BTS equipment.

Lightning requirement on

power supply– Often 50KA

Lightning requirement on – Often 5KA



transmission

Grounding requirement –Joint grounding; BTS < 5Ω; exchange room

< 1Ω

Whether to use solar energy

for power supply–

Pay attention to the solar radiation, the total

power supply of battery array, and the

capacity of the battery.

UPS configuration –

Pay attention to the capacity of UPR (in the

unit of KVA).

Types: one-in and one-out; three-in and one-

out; three-in and three-out.

Inverter configuration – Pay attention to the rated power

Power supply mode of

outdoor BTS– Mains, diesel, and solar energy

2.1.8 Abnormal Network Information and Customer Complaints

I. Network Failures and Alarming Information

The following failures and alarms should be paid special attention to:

A-interface/Abs interface transmission alarm

BTS power supply alarm

No.7 signaling break alarm

II. Customer Complaints

The complaints made by the customers in the latest month should be recorded and categorized;

especially the problems concerning the coverage in hot areas and the problems that are mostly

complained by customers should be checked. Generally, the following aspects deserve your

attention:

The signals received by MS are weak and fluctuate greatly.

The subscriber is not in the service area.

The voice quality is poor. There are noise and one-way audio.

Call drop occurs easily.

The complaints about service failures, such as one-way audio, cross talking, call drop,

incoming call failure, outgoing call failure, are made frequently.

There are complaints about PS service.

2.1.9 Customers’ Engineering and Maintenance Capability

The following capabilities should be paid attention to, because they are references for the design

of network integration solutions.

Capability to adjust the transmission ports



Capability to adjust the core network data

Capability to adjust BSS network data

Capability to maintain BSS network

Capability to implement projects and maintain organizational structure

2.1.10 Acceptance Information

The acceptance should be performed according to contract. If there are vague descriptions or the

committed indicators are abnormally high in the contract, you need to communicate with the

customer for the confirmation of the acceptance mode and procedures in advance. The agreement

on acceptance time, place, personnel, standard, cases, documentation, and equipment should be

reached with the customer.

2.2 Analysis and Evaluation of the Original Network

2.2.1 DT Evaluation

I. Principle

The DT deserves special attention, because the DT results can be used to understand the operation

of the network and decide the DT line after the swap of the network. In addition, the DT results of

the original network can work as comparative references for the swap. The roads covered by the

major lobes of the cells should be chosen as DT lines and the DT lines should cover all the cells of

the network. Note that the test should be performed at the busy hours during daytime.

II. Area DT

The area DT aims to obtain the coverage signal level, conversation quality, handover, and call

drop in the swap areas. In addition, the BTS distribution and coverage weakness of the original

network should be obtained through area DT.

III. DT for Main Roads and VIP Areas

The main roads and VIP areas should be specially tested, especially the handovers occurred on

main roads should be tested, because the test results will be the references for coverage

comparison and network optimization after swap.

IV. DT Data Analysis

The DT data should be carefully analyzed. For example, you should verify the longitude and

latitude of the BTS, the direction of antenna, and the cell parameters. In addition, you should also

check if the antenna feeder is inversely connected and if there is cross coverage. Also the reasons

for call drop and abnormal handover should be analyzed.

V. DT for Indoor Distribution System

If the Bess to be swapped are connected to an indoor distribution system, you need to use the

corresponding software that supports indoor test. Generally, you should get the permission for



entrance before the indoor coverage test. It is better to obtain the plan view of the building

beforehand.

All parts of the building, including upper floors, middle floors, and lower floors, should be tested.

Wrap test should be applied to corridor, meeting room, and offices during pace test. Note that the

outer walls of offices and the areas near windows should be tested.

The test items include signal level, conversation quality, cell reselection at the entrance and exit,

and handover.

For details, refer to the related guides about indoor coverage system acceptance.

A test analysis report is required after the completion of whole test.

In addition, you can also obtain the related references from the technical support engineers.

2.2.2 Network KPI Evaluation

I. Difference of KPI Formulas

The KPI formulas used by Huawei are different from that used by the original network equipment

provider in some aspects. At present, each equipment provider has the ability to design the traffic

statistics and KPI formulas according to customer need, so the statistical points of other providers’

Kips may be different from that of Huawei Kips. Therefore, a full understanding of the original

network (especially the KPI formulas and actual indicators) is quite necessary.

Take the replies made by various equipment providers in an operator’s GSM statistical system for

example; the calculation results of each provider are almost the same. For details, seek help from

the technical support engineers.

You are recommended to measure the paging success rate at MSC side and that measured at the

BSS side should work as a reference only. Before selecting the corresponding Huawei statistical

indicators, you should analyze the actual statistical scope of the Kips of the original network

based on the evaluation of the definition of the statistical points used by the original network

equipment provider. If no corresponding indicator is found, you need to communicate with the

customer for other ones according to the interests of Huawei.

II. Evaluation Principle

The traffic statistics exported by the original network should be used for evaluation. The

evaluation aims to verify if the indicators provided by the customer are real. And the evaluation

results are used as a comparative reference after swap. You can use the customer’s network

maintenance report. If necessary, you can use related test analyzer for the evaluation.

III. Evaluation of Indicators about Voice, Signaling, and Capacity

The traffic volume, SDCCH congestion rate, TCH congestion rate, paging times during busy

hours, and call setup success rate should be evaluated for the understanding of the traffic

distribution of the network. You should pay special attention to the signaling flow at the edges of

location areas. And the pages made during busy hours also deserve your attention.



IV. Evaluation of Quality Indicators

The quality indicators, including call drop, handover, immediate assignment, interference, RQ,

etc, should be evaluated. You need to find out the Bess that have great effect against the total

network indicators and the areas where the network quality is quite poor.

V. NSS-related Indicators

The indicators related to NSS, including one-time paging success rate, location update success

rate, A-interface signaling load, and inter-MSC module handover success rate should be analyzed,

because these indicators may affect the radio network.

2.2.3 Other Evaluations

I. CQT for VIP Areas

CQT is the best method to check if the network quality is good or bad. It includes indoor COT and

outdoor CQT. The spots for CQT are co-decided by the customer and Huawei RNO engineers.

According to principle, it is better to choose important organizations, buildings, and prosperous

areas as the test spots. Note that the spots chosen for the test should be consistent and the test

instruments must be the same before and after the swap, otherwise the coverage quality cannot be

effectively compared after the swap.

Table 2-1 lists the main CQT items

Table 2-1 Main CQT items

Item name Test value Remark

Seized channel number

Average signal strength

LAC+CI

Call times

Call connected times

Call drop times

Voice break times

Background noise

One-way audio times

Echo times

Cross talking times



You can perform CQT by using MS for spot dialing test. Through analyzing the CQT results, you

can see the network change.

II. GPRS Evaluation

GPRS evaluation includes CQT evaluation, DT evaluation, and traffic statistics evaluation.

GPRS CQT evaluation is used to reflect the network access ability, transmission delay,

transmission rate, and service implementation. The test methods include attach test, WAP browse,

Ping test, FTP test, WWW browse, etc. The test indicators include power, activation time, average

delay, throughput, rate, etc.

GPRS DT evaluation is similar to GPRS CQT evaluation. Besides the indicators tested according

to GPRS CQT, the GPRS DT test indicators include location update, cell reselection, coverage,

call drop, etc.

The traffic statistical indicators include performance indicators and maintenance indicators.

For the related references, seek help from technical support engineers.

III. External Interference Test

The external interference sources include TV station, big-power station, micro wave, radar, high

voltage cable, analog BTS, CDMA network, meeting secrecy equipment, interference unit of gas

station, etc. The interference from some sources is present at certain time. Generally, you can find

out the interference through connecting the spectrum analyzer to the antenna.

The Omni-directional antenna is beneficial for interference measurement. If you intend to locate

the interference, you should use directional antenna. The commonly used directional antennas

include plane antenna, 8-shaped antenna, and digital periodical antenna.

The commonly used spectrum analyzers include HP85XX series and YBT250. The low-noise

amplifier can be used to enhance the receiving sensibility of the test analyzer. For YBT250, the

low-noise amplifier is installed in it.

If the customer requires external inference test, you can refer to the related guides about

interference problem handling.

IV. CW Test

To obtain the radio propagation model fitting the local environment, enhance the accuracy of

coverage prediction, and make a good preparation for network planning, some customers require

the propagation model to be adjusted. CW test stands for continuous wave test and is an important

step for propagation model adjustment. The brief steps of CW test are as follows:

1) Select a suitable site to establish the test platform.

2) Install signal source and antenna.

3) Perform DT using the corresponding software.

4) Process and analyze the DT data through corresponding software

For details, see the related guides about continuous wave test.



V. Simulation

Some customers require coverage and quality simulation before and after the swap of the network

and have certain requirements on DT data and simulation results. Generally, they require the

schematic drawings of the coverage and C/I. Simulation software and 3-D digital maps are needed

for simulation. And the adjusted propagation model is recommended. If the propagation has not

been adjusted, you can use the ones provided by the customer. At present, Huawei uses ASSET

and U-NET for simulation.

VI. MOS Test

At present, the QoS of voice quality is evaluated subjectively, and the MOS (mean opinion score)

is the most widely used. However, many objective measures have been used, and the basic ideas

are similar. That is, different measurement technologies are used to simulate people’s auditory and

the equivalent MOS value is provided accordingly. Currently, the PESQ is a mature standard.

Figure 2-1 shows the process.

Figure 2-1 Processing performed in PESQ

As far as the PESQ is concerned, first the input signals and the signals that have been processed

by the system are sent to the test instrument or related software for further processing, and the test

instrument or the software will give the MOS classes.

The value of PESQ ranges from -0.5 to 4.5. The greater the value is, the better the quality is.

Generally, the value ranges from 1 to 4.5. For the matching relationship between the MOS score

and voice quality, see Table 2-1.

Table 2-1 Matching relationship between MOS score and voice quality

MOS score Voice quality

5 Excellent

4 Good

3 Fair

2 Poor



1 Bad

At present, many test instruments support MOS test. In many cities, the MOS test is a must now.

Therefore, you should check the contract carefully to see if the MOS test is required and if the test

instrument supports Huawei product.



2.2.4 Confirmation of the Acceptance Indicators after Network Swap

I. Coverage Comparison

If the customer requires coverage comparison test in the contract, you should pay attention to the

following points:

Understanding the customer’s real intention.

Understanding the test environment and the coverage of the original network.

Designing the solutions to the interest of Huawei.

Protecting malicious interference.

For details, see the related operation guides about GSM BTS coverage.

II. Statement of Compliance

You should check the RNP&RNO parts for which Huawei is responsible. If there is any vague

point, communicate with the customer for clarification.

III. KPI Formulas and Other Test Methods

You should communicate with the customer for the confirmation of each KPI and traffic statistical

point. In addition, the test methods, such as DT, CQT, and the related test instruments must also be

confirmed. Note that you should better guide the customer to use the methods and instruments

recommended by Huawei.

IV. KPI Commitment Evaluation and Guidance

You should evaluate the network after swap reasonably according to the information of the

original network. If you find that the customer’s requirements on some indicators cannot be met,

you should send the information to the project teams and the staff concerned as early as possible.

In this case, all the departments or engineers concerned should take measures to make sure the

pass of the acceptance test.

Chapter 3 Project Survey, Equipment Installation and

Test

This chapter describes the project survey and design, equipment installation and test. The

engineering duration for this part is the longest and this part is quite important for the success of

the network integration.

3.1 Survey and Design

This section describes the survey of equipment room.



3.1.1 Survey of BSC/PCU Room

You can survey the BSC/PCU room according to the related survey guide. The key points are

listed in Table 3-1.

Table 3-1 Key points for BSC/PCU room surveyItem Sub-item Result Remark

Conditions

of equipment

room

Installation

position of

cabinet

The distance between the face of one cabinet and

the face of the opposite cabinet must be equal to

or larger than 1.5m. The distance between the

sides of the cabinet and the wall must be equal to

or greater than 0.8m. The distance between the

commissioning side and the wall must be equal to

or greater than 1m.

Load-bearing

capability

The load-bearing capability of the equipment

room must be greater than 50kg/m2.

The weight of the PCU is 183kg.

The weight of a BSC with full configuration is

280kg.

The weight of the front door and back door is

45kg.

The weight of the two side doors is 42kg.

Temperature and

humidity

The suitable temperature ranges from 15 to℃

30 . The relative humidity ranges from 40% to℃

75%.

Net height

The net height of the equipment room is the

distance between the installation plane and the

girder or the ventilation pipe. Generally, the net

height should be greater than 3m. When

downward cable is used, the net height cannot be

smaller than 2.7m.

SizeThe equipment room should be 2m or more in

height and 1m or more in width.

Power

supply

Capacity of the

rectifier

Generally, power suppliers with high-frequency

switch are required and they should be “N+1”

backup. Each module of the power supplier must

be installed with current equalization output

device.

The total power consumption of a single PCU

must be smaller than 1200W.

The maximum power consumption of a full-



configuration BM is 350W.

The maximum power consumption of a full-

configuration AM/CM is 500W.

DC power

distribution box

You should check if the installation position is

suitable and if the wiring terminal configured by

Huawei is normally configured.

Battery capacityDoes the battery capacity meet the design

requirement?

Colour of power

cable

Does the customer have special requirement?

Some customers require that the grounding cable

should be red.

Diameter of

power cable

At present, three specifications are available in

Huawei. They are 240, 120, and 95 mm^2. You

should check if the diameter of the power cable

meets the requirement.

Layout of power

cable

If the power cable delivered can be installed on

the cable rack normally? And if the cable rack is

fixedly stand?

Transmission

Impedance of

trunk75Ω; 120Ω.

Types of

connectors used

for the trunks

(75Ω) at the

DDF side

BNC, SMB, L9

Diameter of

trunks (120Ω) at

the DDF side

Generally, it is 0.4MM. If the customer has special

requirement, the specification of 0.5MM can also

be used.

Lightning

protection

External alarmThe BSC supports external alarm, but the PCU

does not support external alarm.

Outdoor cable

lightning

protection.

You should check if there is outdoor transmission

cable or power supply cable. If yes, check if the

lightning protection measures meet the

requirement.

Others

Responsibility

matrix for

hardware

installation;

You need to confirm the responsibility matrix of

the installation of transmission equipment and

power supplier.

Clock Clock extraction

modes (BITS,

See related cases.



MCS, or others)

3.1.2 BTS Survey

Table 3-1 lists the key points for BTS survey

Table 3-1 Key points for BTS surveyItem Sub-item Result Remark

Conditions

of equipment

roomLocation of the

equipment room

If there is special procedures for entry;

If there is restrictions for night entry;

If special tools such as the ladder are needed for

entry;

If the transportation of the equipment is convenient;

If installation conditions are needed for advanced

installation.

Load-bearing

capability

The load-bearing capability of the equipment room

should be greater than 400kg/m2. Since battery free of

maintenance should be installed in the equipment

and if the specification of the battery is 500Ah or

lower, the load-bearing capability of the equipment

room must be greater than 450kg/m2. If the

specification of the battery is 800Ah or higher, the

load-bearing capability must be greater than

600kg/m2.

Communication

method used at

the equipment

room

You should check if the equipment room can receive

the signals from other networks and if there is

available fixed phone.

Temperature and

humidity

You should check if the environment of the

equipment room can support long-time operation of

the equipment and if the air conditioner installed for

the equipment room can work normally. Generally, if

temperature in the equipment room can ranges from

15 to 30 , and the relative humidity can ranges℃ ℃

from 40% to 65%.

Net heightThe net height of the equipment room should be

equal to or greater than 2.7m.

Size of the door

of the equipment

room

It should be 2m or more in height and 1m or more in

width.



Installation

position

For the convenience of maintenance, you should

leave a distance between the BTS and the wall.

Installation

conditions of

outdoor BTS

The load-bearing capability, transmission condition,

installation position of the mount set, and grounding

system should meet requirement.

Power

supply

AC power

distribution box

Does the capacity of the AC power distribution box

meet the requirement of Huawei BTS?

Capacity of the

rectifier

Generally, power suppliers with high-frequency

switch are required and they should be “N+1”

backup. Each module of the power supplier must be

installed with current equalization output device. If

the power supply voltage is -48V and +24V, the

charge current of the battery should be additionally

considered (according to 12 TRXs, 2800W). If the

power supply voltage is 220V, you need to check if

the DC power supply cable is installed at the proper

position and the wiring terminal is normally installed

(according to 12 TRXs, 3200W, including the charge

current of the battery).

DC power

distribution box

You should check if the installation position is

suitable and if the wiring terminal configured by

Huawei is normally configured.

Battery capacityDoes the battery capacity meet the design

requirement?

Colour of power

cable

Does the customer have special requirement?

Some customers require that the grounding cable

should be red.

Power supply of

transmission

equipment

If the power supply equipment cannot be reused, you

should check if the power supply cable of the

transmission equipment of the original network is

long enough to be connected to Huawei equipment

and if the diameter of the cable is suitable?

Transmission Impedance of

trunk75Ω; 120Ω.

Types of

connectors used

for the trunks

(75Ω) at the

DDF side

BNC, SMB, L9



Diameter of

trunks (120Ω) at

the DDF side

Generally, it is 0.4MM. If the customer has special

requirement, the specification of 0.5MM can also be

used.

Timeslots

allocated for E1

at the Abis

interface

Monitor the equipment timeslot occupancy, the

timeslots of the related integration equipment, and

timeslots used for G/C transmission.

Transmission

line and the label

for DDF

transmission port

Check if the label or the mark is correct.

Transmission

concatenation

relationship

It will affect the swap order.

Lightning

protection

and

grounding

system

Outdoor

lightning

protection cable

Check if there is outdoor lightning protection cable

for the transmission line and power cable. If yes,

check if the lightning protection measures meet the

requirement.

Grounding

system

Check if the grounding cable is present, if there is

adequate room for the grounding bar, and if the

grounding terminal can be normally connected.

Antenna feeder

lightning

protector

Check the installation position, frequency band,

types of the connectors used for the antenna and

related equipment, and the standing wave ratio. The

problems concerning connectors are main factors

affecting the swap progress, so the survey engineers

should check them carefully in advance.

Feeder

grounding rule

Check if the grounding point can be connected to the

feeder grounding clip.

Antenna

feederDiversity

distance between

antennas

The distance of the 900M antennas should be equal

to or greater than 4m, and the distance between the

1800M antennas should be equal to or greater than

2m.

Project

parametersAntenna azimuth and tilt angel.

Feeder layout Check if the connection of the feeder and antenna is

correct. Use test MS to check if the cell

configuration is correct and if the feeder label is

correct and complete.



Tower amplifier

Check the installation position, working band, power

supply mode, and alarming mode of the tower

amplifier.

Feeder window

and thru-wall

plane

If other antennas need to be added, you should check

if there is adequate room available in the feeder

window.

Filter and

combiner of

common antenna

If an antenna is shared by other equipment, you need

to check if the filter and combiner meet the

requirement?

Feeder connector

in the equipment

room

If the antenna feeder of the network to be swapped

can be reused, you need to know the specifications

and quality of other equipment providers’ antenna

feeders and check if they can match Huawei

equipment.

BTS type and

combiner and

divider

You should confirm the TRX type of the BTSs to be

swapped and the types of the combiner and divider,

because they are used to calculate the set-top power.

Others

Outdoor

extension alarm

BTS supports 24-channel extension alarm, and the

environment alarm box supports 10-channel

extension alarm.

Engineering

responsibility

matrix of

hardware

installation

Confirm the engineering responsibility of the

installation of the transmission and power supply

equipment.

Note:If you find out that the environment of the equipment room or the installation of the antenna is not

in accordance with Huawei rule, you should discuss with the customer and design adjustment

measures, otherwise the operation of the network or the network indicators will be affected after

the integration of the network. If the customer rejects the adjustment measures, you should ask the

customer to sign a memo. In addition, if you find out that some connectors do not match Huawei

equipment; you should design the corresponding solutions immediately.



3.1.3 M2000 Survey

I. Equivalent Network Element

You should calculate the number of the equivalent network elements according to the

configuration of the equipment so as to ensure adequate management capability for M2000.

Table 3-1 provides the calculation of the network element number.

Table 3-1 Network element number calculation

Network typeNumber of network

elementsRemark

BSC+BTS60 cells are equivalent to

1 network element.

If the actual number of the cells is

known, you should perform the

calculation according to the actual

number; otherwise perform the

calculation based on 3 cells

regardless of on BTS or NodeB or

regardless of the network type

(W/C/G).

iMSC 1

tMSC 1

rMSC 1

MSC 1

PCU 1

HLR 0.1

GT800 BSC+BTS60 cells are equivalent to

1 network element.

Table 3-2 provides the matching relationship of the network element number and the server

configuration

Table 3-2 Matching relationship of network element number and server configuration

Server configuration Equipment type

Management capability

(equivalent network

element)

Remark

Mid-range-and-low-end

configuration

Sun Blade 2000 ≤? ?

Sun Netra 20 ≤15

Sun Netra 240 ≤15

High-end configurationSun Fire V880(4CPU)

Sun Fire V880(8CPU)

≤30

≤60



Sun Fire V890(2CPU)

Sun Fire V890(4CPU)

Sun Fire V890(8CPU)

≤25

≤50

≤90

Super configuration

Sun Fire 4800(4CPU)

Sun Fire 4800(8CPU)

≤40

≤? ?

Sun Fire E4900(4CPU)

Sun Fire E4900(8CPU)

≤55

≤120

II. About M2000

You should know the networking mode, bandwidth, and installation position of M2000 and if

there is the network management system of the third party.

Networking mode:

The communication between M2000 and each network element is based on TCP/IP. At the

physical layer, partial E1/T1, whole E1/T1, or DDN/X.25 can be used.

M2000 supports LAN and WAN. The networking planning depends on the geographic location of

the network elements and customer needs. If all the network elements locate in the same network

segment, LAN is often used; otherwise WAN is used.

3.1.4 Project Design

Hereunder lists the tasks need to be completed during project design:

Checking the information of the original network equipment

The information include the specification of antenna and feeder, performance indicator,

connector specification, quantity of the transmission links used in the original network, mode

and transmission line, connector specification of the DDF rack.



Surveying and checking the installation environment of the Huawei equipment and

confirming the jumper length, trunk length, grounding system, feeder, and jumper connector

information.

Confirming the environment of the equipment room of the original network and collecting

the available resources.

Confirming the installation position of the Huawei BTS and attached equipment and

confirming the configuration solutions used for transmission and power supply.

Completing the engineering drawing related to the equipment installation and integration.

Considering the anti-theft equipment or the anti-vibration equipment because some

customers have special requirement in these aspects.

3.2 Hardware Installation

This section describes hardware installation. For general cases, refer to the related manuals and

pay attention to special cases. You should perform the installation following the design strictly and

make self-check after the hardware installation. In addition, you should also make self-check after

software commissioning.

3.2.1 Goods Preparation

The on-time delivery of the correct goods is the key to the success of a swap project, so you

should pay attention to the followings:

The way of delivery, the time and way of customs clearance.

If the goods are consistent with contract configuration.

The storage of the goods.

At the engineering field, you should pay attention to the followings:

For the convenience of engineering and collocation, it is better to store the goods in a vast

land.

The storage of the goods must be in accordance with the customer’s rules.

You need to communicate with the customer on how to handle the goods in advance.

The package cannot be opened during the handling of the goods and the goods should be

carried and placed lightly.

For the convenience of acceptance and cleanup, the goods should be placed according to

certain principles.

The goods should be categorized according to service.

Pay attention to the storage of small components, such as cable, software, and screw,

especially the small and light expensive goods.

On the arrival of the goods, pay attention to how to allocate the goods to the installation site.

A record is needed before the allocation and the signature of the related project team is

required.



If the goods are provided by agents, you need to communicate with the customer fully to

ensure on-time delivery and security shipment.

3.2.2 BSC Installation

I. Constructing a New BSC

For hardware installation, you need to pay attention to the installation of the trunk, optical fiber,

grounding cable, alarming cable, BAM, and loading cable. If there is CDB, you need to check the

connection of CDB and MEM. After the completion of the installation, you need to check the

followings:

If the self-loop checked has been performed for relay transmission?

If the labels are clear? If the optical fiber is bounded according to requirement?

If the there is no cross-connected lines and band connection?

If the self-check has been made according to hardware standard?

If the power-on test has been made?

For software installation, the correct version and license should be used.

II. Expanding the Capacity of an Existing BSC Through Adding BM

For hardware, you need to check if there are cross-connected lines at the A-interface and Abis

interface and if newly-added BM and AM are correctly connected, especially you need to check

the connection of optical fiber.

For software, you need to check if the upgrade and reapplication of License are necessary.

III. Expanding the Capacity of an Existing BSC Through Adding BIE Board Only

For hardware, you need to pay attention to the operation rule, DDF connection, and transmission

test.

For software, you need to pay attention to the version and license.

IV. Expanding the Capacity of an Existing BSC Through Adding BTS Only

There is no special requirement on hardware.

For software, you need to pay attention to the version and license.

3.2.3 Huawei PCU Installation

For PCU installation, you should pay attention to the connection of the power supply cable,

trunks, and network cable. In addition, you should also check if the labels are correctly pasted and

if the power-on test is performed according to requirement.

3.2.4 BTS Installation

BTS installation and test contribute greatly to the success of a swap project. During BTS

installation and test, the workload is heavy and a great number of abnormal conditions may occur.

Hereunder describes the main scenarios about BTS installation and test.



I. Antennas and Feeders

You should construct a new site following general procedures and this task should be finished in

advance. In addition, the standing wave test should also be finished in advance. After that, you

need to test if the antennas and feeders are well connected.

If the antennas and feeders of the original network can be reused, you should make sure that

they can be connected to Huawei equipment normally and that the standing wave ratio will

not change greatly after the swap.

If part of the original equipment can be reused while some new equipment should be added

to the network, you should install the new equipment in advance and make sure that the

original equipment and the new equipment can be normally connected.

If the antennas and feeders of other BTSs are used for this BTS, you need to check if the

combiner, filter, and other related specifications meet the requirement.

II. BTS Installation Room

Scenario 1:

If there is adequate room left in the equipment room and the customer agrees that the new cabinet

cannot be installed in another position, you can install the new cabinet in the due position and

prepare the related power supply cable, trunks, antennas, feeders, and jumpers in advance. At the

night for integration or pre-integration, you need to disable the original BTS and enable the new

BTS. Note the original BTS should still be reserved at this time in case of integration failure.

Scenario 2:

If there is inadequate room for BTS installation and the new cabinet should be installed at the

position where the original BTS located, you must replace the original BTS with the new one at

the night for integration. In this case, you can place the new BTS to the equipment room first, and

then prepare the related power supply cable, trunks, antennas, feeders, and jumpers in advance. If

the installation of the new BTS cannot be finished on the integration night for the time being, you

can integrate the new BTS into the network first, and then choose another suitable night to finish

the whole installation.

Scenario 3:

If there is some room left in the equipment room for BTS in stallion, you can install the new

cabinet in advance. If the capacity of the network needs to be expanded, you can install other parts

after removing the rest original cabinet from the equipment room. In this case, you can place the

new BTS to the equipment room first, and then prepare the related power supply cable, trunks,

antennas, feeders, and jumpers in advance. If the installation of the new BTS cannot be finished

on the integration night for the time being, you can integrate the new BTS into the network first,

and then choose another suitable night to finish the whole installation.

Scenario 4:

If there is inadequate room left for the BTS installation, you can finish the whole installation later.

If the new BTS is not so important, you can use the surrounding BTSs for the coverage



temporarily. At the night for integration, you should ensure the network quality through adjusting

the surrounding BTSs in advance, and then break the services provided by the original BTS.

III. BTS Transmission

If the transmission resources are adequate, you can finish the whole integration in advance. In this

case, the tasks involved are simple and you can debug the BTS. If the power-on test is not

available, you can perform self-loop test so as to ensure smooth transmission.

If the transmission resources are inadequate, you should debug the transmission when integrating

the network. If a great number of BTSs need to be integrated, the transmission resources are the

key to the success of the swap. In this case, you need to perform off-line test to check if the BTSs

work normally.

IV. BTS Power Supplier

If the capacity of the power supplier needs to be expanded, you need to communicate with the

customer to solve this problem before integration. If the customer cannot provide enough capacity,

you can enable only part of the TRXs.

If there is no room left for the installation of the power supplier, you can also communicate with

the customer for solution.

If there is enough room for the installation of the power supplier, you can install it in advance.

3.2.5 M2000 Installation

It is simple to install the M2000. If the number of network elements is great, you need to replace

the M2000 server and change the IP address accordingly.

3.2.6 Removing the Equipment of the Original Network

Huawei engineers are responsible for removing the equipment of the original network according

to the contract. Generally, you should remove the equipment of the original network after Huawei

equipment works normally in the new network. Here you should pay attention to the following

two points:

You can use packaging material of Huawei equipment to package the removed material.

The removed equipment should be soundly transported to the destination on time.

3.3 GBSS Test

GBSS test must be made before network integration. And this section introduces the GBSS test

points.

3.3.1 BSC Test Points

Hereunder lists the BSC test points:



There are many BSC signaling points, so new signaling points should be used for swap.

If the MSC to be swapped is provided by other operator, you need to perform IOT

compatibility test with the help of Huawei technical support engineers.

Since it is the BSC that need to be tested, you are suggested to perform the test according to

the related acceptance manuals provided by Huawei. The customer’s special requirement

cannot go beyond the contract.

If there is cross-BSC handover or cross-MSC handover after Huawei BSC has been

integrated into the network, you need to make handover test.

BSC has great effect against clock, so you need to evaluate the clock in advance. If the

transmission is not good or the MSC clock is not stable, you need to make clock test.

If there is no signaling transmitted at the Abis interface, you should install a temporary BTS

or micro-cell BTS at the suitable place for signaling test.

For G9, A-interface is related to UMG8900 and MSC Server. The UMG8900 is responsible for the

access and exchange of data service and the processing of traffic flow format. In addition,

signaling gateway can be embedded into the UMG8900, so calling messages can be sent to

UMG8900 for adaptation before sent to MSC Server for processing.

3.3.2 CDB/CBC Test

I. Testing Connection between CDB and GMEM

Debugging the connection between GMEM board and host

Testing the connection between GMEM board and CDB server

Testing CDB server

II. Testing Connection between CDB and CBC

Testing the connection between CDB and CBC

Inputting test messages at the maintenance and test console

Monitoring the messages sent across the Abis interface at the BSC maintenance console

III. Testing Short Message Display (MS)

When the BTS works normally, you should use the test MS or the MS supporting cell broadcast to

perform the acceptance test. At this time, if you enable the cell broadcast reception functions and

set received channel number to the ID of the test message, you can see the test message through

MS.

If the MS cannot receive the cell broadcast message, you should first check if the cell broadcast

reception switched is enabled and if the corresponding channel number is set, and then you should

check if the connection between CDB and GMEM is normal. Finally, monitor the messages and

locate the problem at the BTS maintenance console.

By now you have finished debugging the whole CDB cell broadcast database.



IV. Precautions about CDB&CBC Test

Hereunder lists the precautions about CDB&CBC test:

You should use the interface monitoring function provided by the OMC to monitor the Abis

signaling and check if the CB messages from BSC to BTS are normal.

If the CDB and CBC cannot be interconnected, you need to check the phase mark carried in

the cdbcfg.ini of the CDB configuration file.

When performing message display test, you need to pay attention to the language used in

that area, because some special characters cannot be displayed through MS.

Since the CDB interface and CBC interface are not standard interfaces according to

protocols, you must test the interconnection between CDB and CBC.

3.3.3 PCU Test

Hereunder lists the precautions about PCU test:

Network configuration test

To perform network configuration test, you need to log in to the system through Telenet.

Hardware data configuration check

You should input the command “slot show all”. If the configuration is normal, the system

will display that the “status” of each slot is “normal”.

E1 configuration check

Input the command “pcu check e1config” to check the E1 configuration.

PCIC status check

You should input the command “mt pcic show available all”. If the results show that the

number of available PCIC is consistent with that of E1 slot, the E1 slot is successfully

configured.

LAPD link status check

You should input the command “mt lapd show state {<BoardNo> all} | <LapdNo> |

<LapdName>”. If the management status is “unlocked” and the operation status is

“available”, the status of the LAPD link is normal.

Cell configuration check (Gb interface)

You should input the command “pcu check cellconfig all” and the result is that the

configuration is intact.

PDCH status check

Input the command “mt pdch show state {<Leno>|<LCName>} {<PdchNo>|all}” to check if

the status of PDCH is normal.

MS attach test

Once the MS is powered up, it will search the GPRS network automatically and initiate the

attach procedure, so you should test if the MS has been attached to the network successfully.

PDP activation test



PDP can be activated through the MS directly. Also you can activate the PDP through

connecting the MS to portable equipment.

POMU changeover test

The POMU changeover functions are related to multiple equipments, including LanSwitch,

HSC board, network cable, etc. Therefore, you need to test the changeover function of

POMU to check if the connection between the equipments is normal.

3.3.4 BTS Test

I. Off-line Test

If the transmission is not available, you can use local maintenance console to perform off-line test

for the BTS.

Hereunder lists the test items:

TMU and TRX board check

TMU and TRX must be self checked after powered on. If the TMU self check fails, the ALM

indicator will flash.

Software version check (TMU and TRX)

You should check if the software versions of the TMU and TRX are consistent with the

applied ones. If the software versions are inconsistent, you need to upgrade the software to

the corresponding version.

Local software loading and activation

You need to check if the software is normally loaded and activated.

EAC status check

You should check if the communication between EAC and BTS is normal.

Environment alarming check

You should check if the environment alarm probe works normally and if the alarming

information can be reported to the BTS.

TRX power test

You should test the TRX power at each output port (the TRX board should be preheated for

at least 30 minutes). If there test value is abnormal, you need to replace the TRX board with

another one. (Generally, the normal test value ranges from 46.98 dBm to 49.08 dBm.

II. On-line Test and Coverage Evaluation

To ensure the reliability of Huawei equipment before the implementation of the swap, you need to

perform on-line test for Huawei BTSs. In addition, you also need to test and evaluate the set-top

power of various typically-configured Huawei BTSs, because the information is necessary for

customer communication.

Generally, you can make the test and evaluation according to following steps:

1) Test and evaluate the set-top power of the typically-configured BTSs and record the results.

After that, disconnect the antennas and feeders of the original BTSs and test the indicators



(such as the standing wave ratio) of the antenna feeder system to see if the they meet the

requirement of Huawei BTS. If yes, the antennas and feeders of the original network can be

integrated into the Huawei BTS; otherwise you should make corresponding measures

according based on the customer’s permission.

2) Integrate the trunks of the original network into the Huawei BTS temporarily.

3) After the BTS finishes loading the data automatically, you should use frequency locking

function of the MS to make dialing test. Note that each channel number and timeslot should

be tested. In addition, you should also perform DT to test the coverage and handover.

4) After the test, you should recover the equipment to the original state, and then evaluate the

coverage of the original network. This operation can be made before the on-line test.

5) Compare the set-top power and the coverage of the new network with that of the original

network and take anti-risk measures according to actual conditions.

Note:You should report the coverage results to the customer in time to make the customer feels

confident in Huawei equipment. In this case, Huawei is more likely to win the customer’s support.

3.3.5 M2000 Test

If WAN is used for M2000 networking, the LANs can be connected to each other in various ways,

including partial E1/T1 networking, whole E1/T1 networking, and DDN/X.25 networking.

Hereunder introduces the debugging procedures of partial E1/T1 networking.

I. Partial E1/T1 Networking

When partial E1/T1 networking mode is used, the Mercury3600, routers, Ethernet switch, and

other network elements should be configured in the network, as shown in Figure 3-1. If necessary,

you can add set a firewall between the M2000 Server and the network element or the client end.



Figure 3-1 Partial E1/T1 networking mode

II. Network Debugging (Partial E1/T1 networking mode)

The following table lists the steps.

Step Operation Reference

1

Connect the M2000 Server, client end, and each

network element to the Ethernet switch through

network cable.

2 Configure the Ethernet switch.

3 Configure routers for network elements.

4 Configure routers for M2000 Server.

5 Configure Mercury3600.

6 Configure firewall if necessary.

3.3.6 Equipment Function Acceptance

The acceptance should be performed according to contract. If the acceptance items provided in the

contract are vague, on-site engineers should communicate with the customer on project

installation, test mode, acceptance mode, and acceptance procedure. In addition, on-site engineers

should also reach agreement with the customer on acceptance time, place, personnel, standard,

cases, documents, and equipment. Especially for BTS acceptance, you should make clear if the

acceptance should be performed one by one or by batch and if the acceptance should be

performed before or after the integration of the network. Furthermore, you need to know the

customer’s special requirement on project engineering. If the customer requires the equipment



provider to design the test and acceptance solutions, you should communicate with the customer

before the final solutions are made and get the customer’s written confirmation. In principle, the

network cannot be put into operation before acceptance.

Chapter 4 Network Swap Planning and Network

Parameters

4.1 Network Swap Planning

4.1.1 Whole Network Planning

I. Coverage Planning

It is important to ensure that the coverage capability of the new network is equal to or better than

that of the original network. This is the general swap principle. For details, see the related

coverage planning guides. Hereunder lists the precautions about the swap planning:

To prevent the network coverage from being heavily affected by the swap, you need to check

the antennas and feeders of the original network if they can be reused. If there is any

problem, you should sign a memo with the customer and provide corresponding adjustment

measures.

If new antenna and feeder will be used to replace the old ones, the azimuth and tilt angle of

the new antenna and feeder should be consistent with that of the old one. If the customer

requires you to adjust the azimuth and tilt angle of the antenna to meet special coverage

requirement, you should sign a memo with the customer. In this case, you should integrate

the change of antenna gain and feeder loss into consideration.

To obtain the set-top power used for the swap, you need to analyze the TRX power,

combination mode and loss of the sites of the original network. In addition, you should also

decide the configuration solution according to the TRX power and combiner type of Huawei.

If the set-top power of the original equipment is greater than that of the Huawei equipment,

you should guide the customer to accept the solutions provided by Huawei. Generally, you

can use the 60W/TRX or PBU. Note that you should output a configuration table for each

site.

Hereunder lists several principles for site configuration:

Try best to use the common configuration solution of Huawei or the 60W/TRX to meet the

coverage requirement after swap.

If the set-top power of the new network is lower than that of the original network under

common configuration, you can use PBU if no cabinet should be added.



If PBU cannot be added to all the TRXs, you are suggested to use both the PBU and IUO

strategy.

If PBU cannot be added to the original cabinet, you can add PBU and use multi-antenna

configuration.

If the set-top power of some TRXs is still lower than that of the original network when

multi-antenna configuration is used, you are suggested to apply PBU configuration to all the

TRXs.

If multi-antenna configuration is not supported, you can apply PBU configuration to the

newly-added cabinet.

If both PBU configuration and multi-antenna configuration are not supported, you are

suggested to add new sites to the network and enable cell splitting strategy.

However, you need to pay attention to the following three points:

If some sites need to be expanded or their combination modes have changed after swap, you

should swap the sites according to the original configuration and then expand the capacity.

For the swap of the sites with large configuration, you can seek help from the technical

support engineers of Huawei and they will provide you with the corresponding operation

guide.

If the tower amplifier was used for the original site, it should also be used for the new site,

but you should check the power supply mode and working current.

After the completion of coverage planning, you should input the planning information into the

total project parameter table.

II. Capacity Planning

You should swap the network according to its original configuration and the capacity expansion

should be performed after the swap. For details, you can refer to the related guides about capacity

planning.

For signaling channels, you should plan the configuration solution through analyzing the

configuration of the signaling channels (CCCH and SDCCH) used in the original network and

analyzing the characteristics of Huawei equipment. At the intersections between location areas,

you can add SDCCH and enable the SDCCH dynamic allocation function of Huawei equipment.

For details, you can refer to the related guides about SDCCH capacity planning.

You should also follow the configuration of the original network to swap the PDCH. If the

customer requires Huawei to provide GPRS/EDGE services after the swap, you can plan the

capacity according to the related guides about GPRS/EDGE network planning. Note that PBCCH

and PCCCH should not be configured in the original network.

III. Frequency Planning

To ensure the smooth network transition, you are suggested to follow the original frequency

planning for the swap; otherwise the conversation quality may become worse after the swap.



If you find that there is serious problem or the frequency planning of the original network will

affect network quality, you can re-plan the frequencies for the total network or for some areas.

Note that the frequencies at the intersections between networks should be properly designed.

For details, see the related guides about frequency planning.

IV. LAC and CI Planning

You should negotiate with the operator concerned to decide the LAC and CI planning. During the

swap, you are suggested to provide new blocks for LAC and CI. The LAC edge of the original

network can be used for the new LAC, but the CI must be re-planned. In this case, you can design

the MSC data and BSC data in advance to ensure the security of the data. If problems are present

at the LAC edge, you can adjust LAC edge from the perspective of total network after the network

has been swapped. If the LAC and CI of the original network are stilled used after the swap, you

need to change lot of MSC data and BSC data on the swap night.

For BSIC planning, the BSICs of the same-frequency BCCHs must be different. When swapping a

project, you are suggested to shift the NCC and follow the BCC of the original network. In this

case, you can configure the adjacent cell relationship in advance; otherwise you must modify the

data on the swap night.

For details, see the related guides about location area capacity planning.

When changing LAC, you should take the charging equipment and MSC routing into

consideration.

V. Radio Parameter Planning

To ensure smooth network transition, you should take the radio parameters of the original network

into consideration. After the completion of the swap, you should optimize these parameters. Some

equipment parameters can be the defaulted ones according to Huawei. If only some of the

parameters can be collected, you should refer to the related parameter planning guides. When

planning radio parameters, you should pay attention to the periodical location update time, uplink

and downlink DTX, radio link expiry, SACCH multi-frame number, ECSC, multi-band report,

minimum access level of RACH, minimum Rxlev of MS, direct retry, CRO, CRH, etc.

VI. Huawei Functional Parameter Planning

Huawei has developed many excellent functional algorithms for its GBSS system, including

handover algorithm and parameter, channel allocation algorithm and parameter, IUO parameter,

etc. To ensure that the network can work normally after swap, you should use the proper handover

algorithms (PBGT handover, emergent handover, edge handover, load handover, or IUO

handover) and plan the related parameters properly. Generally, the PBGT handover algorithm,

load handover algorithm, and IUO handover algorithm, and emergency handover algorithm

(including TA emergency handover algorithm, BQ emergency handover algorithm, and

interference emergency handover algorithm) are needed in a network. In some urban areas where

the traffic volume is heavy, load handover algorithm should be used. For power control, the HW II



power control algorithm is used. For channel allocation algorithm, HW II Channel Allocation

algorithm is used.

VII. Special Scenarios

You should pay attention to the coverage planning in some special scenarios, such as indoor

environment, tunnels, railways, subways, etc. For example, you can use indoor distribution

antenna system to provide the coverage for indoor environment and use big-power TRX and high-

gain antenna to provide the coverage for vast area. Pay attention to use repeaters. If the repeaters

to be used are frequency selection repeaters and if the channel number of the donor antenna needs

to be changed after the swap, you should notify the customer to change the repeater data. For

details, you can refer to related planning guides or seek help from technical support engineers.

4.1.2 Network Swap Planning Data Design

Before designing the data, you should use the parameter conversion tool made by Huawei to

convert the parameters of original operator into Huawei parameters.

I. Designing Network Swap Planning Data

The following table lists the data design methods, precautions, advantages, disadvantages, and suggestions.

Data

Types

Design

MethodsRemarks and precautions Advantages Disadvantages

Suggestions

Frequency Take the

data used in

the original

network for

reference

1. Design the frequency

planning data for each

Huawei site according to

the data used in the

original network.

2. If frequency hopping is

used, pay attention to the

allocation of frequency

hopping mode, MA, HSN,

and MAIO.

1. The problems

concerning the

frequencies at edges do

not exist.

2. The understanding of

project parameters will

be more complete and

thorough.

3. The frequency will

be more rational.

1. If the frequencies

in the original

network are poorly

planned, the network

will not be apparently

improved and the old

problems are still

present.

2. Network

expansion, TRX

construction, and

BTS construction

cannot be performed

at the same time with

swap.

1. You can

inherit the

frequency

planning data

used in the

original

network.

2. If the

frequency

planning

methods used

in the

original

network are

irrational,

you can re-

plan the

frequencies

for the total

network.

Re-plan the

data

Prepare new frequency

planning before swap.

1. The problems

concerning the

frequency planning in

the original network can

be corrected.

2. The network

expansion, TRX

1. The network

quality may become

worse because of the

change of the

frequency planning

methods.

2. You need to make



construction, and BTS

construction can be

performed during the

swap.

transition data to

prevent frequency

interference

occurring at edges.

LAC and

CI

Inherit the

original

LAC but

re-plan the

CI

When using the LAC of

the original network, you

need to consider if the

capacity of the location

area is large enough.

1. The workload is

small at the swap night.

2. The location areas are

clear and there is no

mixed LAC.

1. You need to re-

apply for the CI

number segment;

otherwise you cannot

prepare the MSC data

in advance.

2. You may need to

re-plan the LAC after

swap.

Inherit the

LAC but re-

plan the CI.

Inherit both

of the LAC

and CI

If only some of the

BTSs under the BSC

can be swapped at

that night, you need

to change plenty of

adjacent cell

information, so the

swap risk is high.

BSIC Take the

data used in

the original

network for

reference

Inherit the BSIC

configuration data used in

the original network.

The planning workload

is light.

The same frequency

may have the same

BSCI and you cannot

design the adjacent

cell in advance.

Shift the

NCC and

keep the

BCC

unchanged.

Re-plan the

data

1. When re-planning the

BSIC data, shift the NCC

only. For example, if the

NCCs of the original

network are 0, 1, and 2,

they can be 3, 4, and 5

after the shift. For BCC,

you should keep it

unchanged.

2. Check if the adjacent

cells are using the same

frequency and same BSIC.

3. Pay attention to modify

the BSIC of the external

adjacent cells at the edges

during batch swap.

1. When the frequencies

of the original network

are reused, you can also

design the data for two

sets of adjacent cells.

2. The swap data can be

loaded to the BSC in

advance and the data for

two sets of adjacent

cells can be operated

simultaneously.

Cell

optimizati

Take the

data used in

1. Use parameter

conversion tools to

The network quality can

be ensured after swap,

It is hard to collect all

the data because the

Design the

data



on

parameter

the original

network for

reference

convert the parameters of

the original network into

corresponding Huawei

ones, and then analyze if

these parameters are

applicable according to the

characteristics of Huawei

equipment.

2. If some parameters of

the original network

cannot be obtained, you

can use Huawei empirical

parameters first and

optimize them later.

because most of the

parameters used in the

original network are

inherited.

data format varies

with operators.

according to

the

parameters

used in the

original

network and

use the

related

parameter

collection

tools.

Use

Huawei

empirical

value

1. Take the related

network planning data

guides for example.

2. Configure the data

according to Huawei

empirical value.

The planning method is

simple and the

workload is light.

1. The radio

parameters are no fit

for the actual radio

environment, so the

network indicators

may fluctuate greatly

after swap.

2. The optimization

workload is heavy

after swap.

Adjacent

cell

parameter

Take the

data used in

the original

network for

reference

1. You can make the

adjacent cell data

according to the data used

in the original network,

and then use NASTAR or

MAPINFO for

optimization.

2. For one-time swap, you

need to make the data for

one set of adjacent cells

only. For batch swap, you

need to make the data for

two sets of adjacent cells

at the edges. In addition,

you should notify the

customer to modify the

adjacent cell data designed

by the original operator.

3. If Huawei sites are

under the control of

1. You can inherit the

data of the adjacent

cells that are used for

actual handover to

reduce the planning

workload.

2. The handover will

not be greatly affected

after network

integration, so it is good

for network

optimization.

Some data of the

original adjacent cells

may be missing or

irrational, you need

to check the data for

confirmation.

Modify the

data based on

that used in

the original

network.



multiple BSCs, you should

make the adjacent cell

data accordingly.

4. Pay attention to design

the data for the adjacent

cells outside the BSC

edge. The number of

adjacent cells cannot be

greater than 32. For batch

swap, if you need to make

the data for more than 32

adjacent cells, you are

suggested to reserve the

original cells first, and

then delete the old data

before add new data.

5. After the completion of

the whole swap, you need

to cancel the information

of the redundant adjacent

cells.

The calculation of LAC is based on certain traffic model and paging strategy. Since the traffic

models in cities and countries are different, the capacity of a location area may greatly different

from that of another location area. For details, you can refer to corresponding guides and seek

help from technical support engineers. The following table gives the capacity of a location area.

(If the traffic volume of each subscriber is 0.02Erl at busy hours.)

No.BCCH

allocation

Paging

mode

AGCH

reserved

blocks

PCH

blocks

Frame

number

between

same

pages

Subscribers

supported

Traffic

volume

supported

In average, 3

TRXs are

configured for

each cell.

(Suppose that

the call loss rate

is 0.5% and

each cell

supports 11.8

Erl traffic.)

In average, 2

TRXs are

configured for

each cell.

(Suppose that the

call loss rate is

0.5% and each cell

supports 6.6 Erl.)

Remark

1 Main

BCCHIMSI

2 7 2 83785 1676 424 503

2 1 8 2 95754 1915 484 575

3 0 9 2 107724 2154 545 647Immediate assignment

preferred

4 TMSI 2 7 2 130701 2614 661 785

5 1 8 2 149372 2987 756 897

6 0 9 2 168044 3361 850 1009 Immediate assignment



preferred

7

Combined

BCCH

IMSI

1 2 2 30238 423 107 127


preferred

9

TMSI

1 2 2 48494 679 172 204


preferred

Note that in actual calculation, if the traffic models are used in another occasions, you need to change the traffic volume accordingly. In this case, the calculation results

will be different.

After completing planning the data, you need to design RNP parameter design report and project

parameter table.

II. Designing Other Data

For how to design handover algorithm and related parameters, power control algorithm and

related parameters, and channel allocation algorithm and related parameters, refer to the

corresponding guide and seek help from technical support engineers. In addition, you need to

design the related data specified in the RNP parameter design report.

III. Designing Data for Secondary Integration

If a BTS should be integrated into one BSC before being integrated to the destination BSC, you

should design two sets of data for the BTS. The frequency parameters can keep unchanged. You

need to check if adjacent data and LAC needs to be modified.

4.1.3 RNP Data Review

When reviewing the RNP data, you should pay attention to the following points:

If the corresponding documents are output, including project parameter table, swap planning

report, acceptance indicator confirmation and guide record, and RNP parameter design

report.

If the output documents and RNP data are correct, applicable, and complete.

If the network quality meet the customer’s requirement.

4.2 Network Interconnection Parameter Confirmation

4.2.1 A-interface Interconnection Parameters

The following table lists the A-interface interconnection parameters.

Type Item Remark

Relay and

signalling

Signalling point code Hex or decimal notation. The

signalling point code of BSC must

be consistent with that of MSC.



Signalling network mark

Domestic equipment is defaulted.

The signalling network mark of

BSC must be consistent with that of

MSC.

Coding scheme

It is defaulted to 14 digits. The

coding scheme of BSC must be

consistent with that of MSC.

G9MSC does not support A-

interface 24-digit coding.

CIC range and CIC of each

E1

Each timeslot of each relay circuit

of MSC and BSC must be

consistent.

TCSM maintenance slotThis slot must be set to unavailable

in MSC.

Signalling link slot

Generally, it is 16. The signalling

link slot of BSC must be consistent

with that of MSC.

Signalling link codeThe signalling link of MSC must be

consistent with that of BSC.

Signalling link number

You are suggested to configure 2

CCS7 links and 2 LPN7 boards for

each module.

TimersSCCP-TIAR length and

SCCP-TIAS length

Generally, they are defaulted

values. Sometimes the BSC data

needs to be modified.

Physical

connection

Selection BSC clock sourceSelect two good E1 lines and

extract clock from them.

Matching impedance of E1

The matching impedance of E1

must be consistent with that of the

transmission equipment.

CRC verificationThe CRC of MSC must be

consistent with that of BSC.

Service

function

Voice version supported

(HR, FR, EFR, AMR) The circuit

number must be corresponding to

the voice version.

Half-rate channel allocation

strategy

It is default to the BSC allocation

strategy.

Mobile country mode,

country code, mobile

network number

They must be consistent among

MSCs.



A-interface phase markFor new sites, it is PHASE2+, and

sometimes it is PHASE1.

CGIThe CGI of BSC must be consistent

with that of MSC.

MSC paging mechanism

Paging according to LAC is

recommended; otherwise the A-

interface signalling load will

increase.

Encryption algorithm

(A50, A51, A52). No encryption.

The encryption algorithm of BSC

must be consistent with that of

MSC.

T3212

The location update period of MSC

(VLR) must be longer than that of

BSC (VLR).

Handover relationship

Inter-BSC handover and inter-MSC

handover should be properly

configured.

4.2.2 Gb-interface Interconnection Parameters

Type Item Remark

E1

configuration

FrFormat FR

FR (frame relay) has two formats,

PCM_30 and PCM_31. No matter

which one is used, it should be fit for

SGSN.

CodeClass

There are two code classes, including

hdb3 and ami. No matter which one

is used, it should be fit for SGSN.

FrameType

The Gb-interface frame has two

types, including pcm_df and

crc4_mf. No matter which one is

used, it should be fit for SGSN.

ClockMode

The clock mode is configured as

“master” in SGSN. In PCU, it is

configured as “slave”.

BC

configuration

TimeSlot The timeslot occupied by bearer

channel must be consistent with the

data configured for BC at the SGSN



side.

DLCIType

It stands for data link connection

identifier and it must be consistent

with that in SGSN.

FR Mode

FR mode has two types, including

DTE and DCE. No matter which one

is used, it should be corresponding to

SGSN. Generally, it should be

configured as “DTE” in PCU.

FR protocol

The RF protocol must be fit for

SGSN. You are suggested to

configure it as “q933”.

NS-VC PVC

configurationNSEI

Generally, a NSE should be

configured the PCU and each BSC

that is connected to the PCU. The

NSEI must be consistent with that

configured for the SGSN.

Cell data

CellID

Cell ID is 15 bytes or 16 bytes in

length. The first 5 bytes (when the

cell ID is 15 bytes) or the first 6

bytes (when the cell ID is 16 bytes)

should be BCD. The last 10 bytes

should be hex and must be consistent

with the cell ID of the SGSN. In

addition, the last 10 bytes should also

be corresponding to CGI.

BSSID

BSSID is used to identify one BSS

from another. It should be consistent

with the data configured for SGSN.

4.3 Customer Suggestion

You should collect customers’ suggestions on network parameters and service features. If

contradiction is found in the suggestions, you should communicate with the customer for

confirmation in advance.



Chapter 5 Network Swap Preparations

After the completion of equipment test, you can prepare for the network integration. This section

introduces the network swap preparations.

5.1 Network Swap Solution Design and Review

5.1.1 Overall Swap Solutions

If a network includes multiple network elements, you should output the overall swap solutions

first. Generally, the overall swap solutions should contain the following points:

Introduction of the original network, including networking mode, network configuration,

network identifier, network characteristics, and swap difficulties.

Introduction of the swap characteristics and order.

Swap principles, such as security, smoothness, low cost, and high efficiency.

General swap ideas based on the characteristics of the original network.

Technical solutions used to swap each network elements, including M2000.

Technical parameters used to swap each network elements.

Precautions about the network swap.

Conclusion.

5.1.2 Designing and Reviewing the Solutions Used to Swap Network Elements

After installing the equipment and finishing the test and after the completion of network swap

planning, you can begin to design the solutions used to swap network elements.

For the specific solutions of swap implementation, see Chapter 6.

The whole solutions include network swap planning report and network integration solutions.

A swap project will affect the BTS configuration and combination mode, so you should

implement the swap according to customer’s requirements specified in tender document. In

addition, you should also provide the coverage and capacity solutions based on full

communication with the customer.

Generally, the coverage should become better after swap. However, you should thoroughly

analyze the tender document before beginning the swap. For some rigorous requirements

beyond engineering capability, you should explain the reasons to the customer and give

reasonable suggestions. In this case, R&D engineers, RNP engineers, and marketing

engineers should cooperate with each other to design a competitive solution.



On-site engineers should be familiar with all the coverage solutions provided by Huawei and

use the applicable one according to actual conditions.

Design the detailed swap solutions, including technical solutions, changeover solutions to

swap failure, swap planning, and personnel responsibility matrix. In addition, forms used for

subsequent test are needed, such as dialing test form, data check form, etc.

When designing network integration solutions, you must take all the possible risks into

consideration and communicate fully with the customer on these risks beforehand.

The swap solutions designed for large networks must be submitted to the technical support

engineers of the related regional divisions and the HQ for review before implementation. The

purpose of the review is to ensure the rationality, application, and correctness of the solutions.

Generally, after completing network swap planning report and integration solution, the on-site

project team should send the report and solution to the project monitoring owner and the owner

should organize the engineers concerned to review them. (The project monitoring owner can be

the project manager and the technical owner. If there is no project manager, you should send the

report and solution to the related product manager and RNO manager.). Note that the review

results should be copied to the related technical support engineers. For key projects and sensitive

projects, the on-site project team should organize R&D engineers, RNP engineers, marketing

engineers, and GBSS technical support engineers to hold a meeting to review the project. After

the meeting, a review summary is needed.

To win the customer’s acceptance and recognition of the swap project, you should communicate

fully with the customer on the reviewed swap solutions.

5.1.3 Swap Plan and Customer Confirmation

You should design an applicable swap plan based on manpower resource and confirm the

cooperation affairs from the customer, or you can work together with the customer to design the

swap plan.

5.2 Network Swap Preparations

5.2.1 Coordination Meeting and Customer Cooperation

You should submit the swap solution to the customer before integration and hold a swap

coordination meeting at the necessary time. Hereunder lists the confirmation points:

The swap solution must be recognized by the customer.

The time to start and end the swap; and the mark for successful integration and changeover

conditions.

The responsible swap persons of the customer and Huawei; the responsibility matrix of

project teams; and manpower arrangement. A dispatch management team should be set to



coordinate the implementation of the whole project. A supervisor and a skilled engineers

should be allocated for each project team. In addition, a standby team must be available.

Resource requirements, such as vehicles, test MS, test card, emergency lamp, and multi-

meter, light emitting diode, standby transmission equipment, standby board, keys, and other

common tools.

Customer’s coordination departments and related affairs.

When swapping the network, the engineers responsible for transmission, switch, and BSC should

cooperate with each other. The following table gives the responsibility matrix.

No.Cooperation

departmentCooperation affairs

1Transmission

Debug the A-interface transmission and Abis interface transmission for

BSC and debug the Abis interface transmission for BTS.

2 Switch Cooperate with the project team to modify the related data during swap.

3Original BSC

Modify adjacent cell relationship and take measures to change the BTS

back to the original state if integration failure occurs.

4Customer’s BTS

engineer

Coordinate with the project team to integrate BTS and check if the BTS

works normally after swap.

5RNO

Provide DT and CQT; handle problems in time; and optimize the network

after integration.

5.2.2 Integration Difficulty Analysis and Emergency Measures

You should evaluate possible risks and difficulties before network integration and design

corresponding emergency measures. For details, see the last chapter of this document.

In addition, you need to foresee what should be done if failing to integrate the network.

5.2.3 Personnel Arrangement, Vehicle Arrangement, Test Tool, Installation Tool, Equipment Preparation, and Emergency Measure

I. Personnel Arrangement

Network swap is a systematic project, so on-site owners should make good personnel

arrangement. Generally, Huawei personnel can be divided into the following groups:

Leader team

It is responsible for communication, guidance, and resource coordination. Generally, a leader team

consists of PM and local marketing and service leaders.

BSS project engineering team

It is responsible for implement the swap project. Generally, this group consists of general

technical owner, BSC supervisor, BTS integration test personnel. (Partner’s engineers are usually

responsible for the integration test.)



Emergency/standby group

If a project team cannot finish the corresponding task due to unexpected reasons, the

emergency/standby group will continue the task. In addition, the emergency/standby group is also

responsible for the equipment delivery and test.

RNP&RNO team

It is responsible for network planning and optimization and it consists of Huawei engineers and

partners’ engineers.

Support team

It consists of the experts from regional divisions and Huawei HQ and R&D experts. These experts

are responsible for emergency cases.

Customer’s cooperation group

The customer should arrange the contact persons for each group mentioned above and a general

contact person. In addition, technical engineers responsible for transmission debugging, data

modification, problem elimination, and network changeover are needed.

For the information of personnel arrangement, it should be provided according to the following

table.

Role Name Telephone Responsibility

Customer’s general

coordinator

Monitor and coordinate the whole swap

project.

Huawei general owner Arrange and dispatch Huawei engineers.

Customer’s cooperation

personnel

Coordinate the personnel, vehicle, SIM card,

dialing test, etc.

Cooperate with Huawei engineers on BSC

integration, transmission, and dialing test.

Responsible for BTS integration, equipment

room entry, and lighting.

Responsible for MSC cooperation and BSC

cooperation.

Customer’s RNO engineers are responsible

for cooperating with Huawei engineers on DT

and parameter adjustment. In addition, they

should monitor the network quality on the

next day after integration and handle

emergency cases.

Huawei BSS integration

personnel

Responsible for on-site BSC integration and

acceptance.

Responsible for on-site BTS integration and

check.



Role Name Telephone Responsibility

Owner of network optimization. Responsible

for DT after integration and monitoring the

network on the next day after integration and

handling emergency cases.

Support BSS/NSS/GPRS/M2000 at the

remote end.

Responsible for MSC cooperation if

necessary.

Automotive personnel

Note:Two engineers are needed in BSC room. One is responsible for BSC test and A-interface dialing test. And the other is responsible for confirming the identifiers of A-interface port and Abis-interface port and debugging BTS.

Generally, a team is responsible for integrating two BTSs at most. And the personnel arrangement

depends on actual conditions.

II. Vehicle Arrangement

Vehicles are used to perform DT and send BTS personnel. The vehicle arrangement should be

finished several hours before integration. Generally, each DT team needs a vehicle. For other

cases, the vehicles are arranged according to actual conditions.

III. Test Tool and Installation Tool

Tool Purpose Remark

Digital power meter Test TRX transmit power

Match-terminated line Used for power test

When antennas cannot be

connected, the match-terminated

line can function as the antenna.

Site Master

Test the standing wave of the

antenna and feeder system and

locate antenna failure.

Pay attention to the connectors of

the matching cable and configure

straight filter when installing

tower amplifier.

Test MS

It is used for dialling test and

checking if the handover

relationship, cell direction, and

frequencies are consistent with the

designed ones.

It is used together with the test

card.

Other operators’ SIM cards They are used for the connection

between the equipment room and the

dispatch center when the BTS is

unavailable during integration. Note

It is used to ensure smooth

communication during network

swap.



that you should have a

understanding of the coverage of the

original network first.

Portable computerIt is used for local maintenance and

upgrade.

Serial port, BTS maintenance

software, and BTS host software.

BTS local maintenance lineIt is used to connect the TMUs of

each site.

Cutter

ScrewdriverCross screwdriver and shovel

screwdriver

If there is small BTS, you should

use special screwdriver.

Multi-Meter

It is used to measure the voltage of

the BTS and the current of the tower

amplifier.

Light Emitting DiodeIt is used to check if the transceiver

is normally connected.

8/10 ejector lever

12-inch adjustable wrenchIt is used to connect feeder

connectors.

Packet lamp It is used for night swap.

120-Ω clamp tool It is used for 120-Ω transmission.

120-Ω jumper It is used for 120-Ω transmission.

Electric ironIt is used to make the connectors of

75-Ω transmission cable.

Feeder connector making

tool

It is used to make connectors of

feeder and jumper.

IV. Spare Part Preparation

The spare parts should be prepared according to field needs. The spare parts of the BSC, BTS,

TRX, and TMU should be available. Generally, the spare parts are included in contract; otherwise

you need to prepare the related spare parts in advance and take them to the field at the integration

night.

V. Emergency Measures

The emergency measures must be made in advance.

5.2.4 Version Confirmation and License Application

You need to check if the current version support the functions required in the contract and check if

the old license can still be used. Note that the software versions should match BSC, PCU, BTS,

and M2000. For the project supervisors, they should apply for the correct software version

through related electronic process. And the versions are available after the corresponding

technical support engineers have reviewed the application.



5.2.5 Swap Data Design and BTS Swap Preparation

I. BSC Swap Data

The BSC swap data includes the data of the Huawei BSC and data of the BSC of the original

network, the former of which should be prepared by Huawei engineers and the later of which

should be prepared and collected by the customer.

Huawei BSC data includes adjacent cell relationship and MSC interconnection data. You

need to confirm if the Huawei data is supported by the customer. In addition, you should

note that if the BSCs of the original network are under the control of one MSC and if the

LAI and CGI of the original network can be reallocated.

For the BSC data of the original network, you need to modify the handover-related data

only. That is, add adjacent cell data to the original cells that have been swapped and

configure the Huawei cells as adjacent cells of the ordinal cells.

Hereunder introduces the steps to design Huawei BSC swap data:

1) Submit the reviewed RNP&RNO data to the project supervisor

After the RNP&RNO data has been reviewed, you should submit the RNP parameter design

report to the project supervisor. For details, see the previous introductions.

2) Design BSC hardware data, BTS hardware data, interconnection data, and network planning

data. After that, the project supervisor should check the data according to the following

instructions:

If the data is fit for the version used for deployment.

If all the data is correctly designed.

If the configuration data of the BSC hardware is consistent with the designed file. For

example, the position of the transparent BIE must be fit for the actual connection and the

FTC board configuration must also fit the actual connection.

If the type and port configuration of the BTS are in accordance with the actual connection.

If external cell data is added to Huawei data. In addition, if the parameters (such as phase

mark and CIC) related to A-interface are necessary.

Make sure that the data can be normally converted on BAM.

Make sure that if the functional hardware supports related functions, such as half rate

function, and check the corresponding 14FTC/34BIE.

3) Check DBF data

After designing the project supervisory data, you should submit the DBF data to the network

planning owner for review. And the network planning owner should use OMC program and Nastar

to check the DBF data. In addition, the network planning owner should also check the followings:

If each algorithm is fit for planning design.

If all the parameters are configured and correct.

If the values of the parameters are greater than the suggested values.

If the adjacent cell data is completely and correctly configured.



If the configuration of half rata and MAR is fit for the design.

If any abnormal information is found, you should correct the information. After that, create an

“Autocfg.dat” and put all the above information into the file. And this file should be sent to

engineering personnel for loading.

II. MSC Data

The destination (signaling) point code of the LAC and CI of the BTSs to be swapped should be

changed. Since the BTSs will be under the control of other BSCs after swap, the destination

(signaling) point code stored in the MSC database should be changed accordingly.

To ensure the smooth interconnection and interworking, you should confirm the information of

the Huawei BTSs that need to be added to the original system. In addition, you should also

confirm that the CGIs and LACs of all the cells are defined in MSC. Note that the definitions of

CGI and LAC vary with operators, so you need to check them one by one. If cross-province

handover or cross-region handover will appear, you should notify the customer to modify the

related information after the integration of the network.

For packet service, you need to confirm the data related to LAC and SGSN. For prepaid service,

you need to consider if the routing information of the prepaid subscribers should be modified.

III. PCU Data

You need to check the following data:

IP address configuration (If the IP address is correctly configured.) Routing information (If the routing information is correctly configured.) Hardware data configuration (If the POMU board, RPPU board, L2PU board, and PMC

board are configured at the corresponding slot.) E1 slot configuration (If the RPPU board number, E1 number, and E1 sub-slot number are

correctly configured. And if the E1 slot configuration at the PCIC side is consistent with that of the BSC side.)

LAPD link configuration (If the link configuration is consistent with that configured at the

BSC side.)

ATTR data configuration (Pay attention to check the configuration of CGI and routing area.)

GPRS data configuration (Pay attention to check the network mode of operation and other

defaulted values.)

Dynamic adjustment parameter configuration (CS type and license restriction)

PDCH parameter configuration

E1 configuration at Gb interface (Pay attention to the load sharing principle, the backup

principle, clock, frame format, code, and other interconnection parameters.)

BC configuration (Pay attention to the configuration principle and interconnection setting.)

NS-VC configuration

Cell data configuration at Gb interface (CellID and BSSID)

IV. SGSN Data

The SGSN data is mainly prepared for PCU swap.



V. BTS Integration

You need to get the key to the equipment room. The BTS integration is performed according to BTS survey, but you can finish the preparations in advance.If many BTSs are to be integrated, you need to carry computers to load the software; otherwise the load at the BSC side will become heavy.

VI. Network Optimization Integration Preparations

After testing the original equipment, collecting the swap data, and planning the frequencies and

parameters, you should confirm the test time, place, and lines for the integration. For details, see

RPO401-01 DT preparation self-check list (G/C/W).

Note:A work memo is needed for data design and modification. The memo should include modification

contents, required feedback time, name and ID of engineering personnel, engineering time, etc. At

last, this work memo must be confirmed and loop closed.

In addition, you should confirm the transmission according to the following instructions:

The labels of the A-interface, Abis-interface, and Gb interface (the three interfaces locate at

the GBSS side and GBSS is installed on DDF rack) are confirmed and placed in due

position.

The trunks are normal and the status of the indicators of BIE board and MSM board is

normal.

A-interface transmission is fit for CIC configuration according to project file and data.

The connection between each BTS and the concatenation relationship of each are correct

according to project file and data.

Enough jumpers should be prepared.

The A-interface transmission at the MSC side and the Gb interface transmission at the SGSN

side should be confirmed.

5.2.6 Pre-integration

Pre-integration is often used in a swap project. You should judge if the pre-integration is necessary

according to actual conditions. If yes, the pre-integration should also be implemented according to

strict steps and plans. If any problem is found according to the pre-integration, you should correct

them and make a conclusion immediately. All the information collected according to the pre-

integration should be sent to the related experts for analysis.

If the pre-integration results are very good and win the customer’s reorganization, you should

begin formal integration. Before designing the pre-integration solutions, you can communicate

with the customer in advance to reach an agreement on the integration.



Chapter 6 Swap Implementation

This chapter introduces the swap implementation. Since there is time restriction on network

integration, detailed arrangement and test are important. Hereunder lists the points that need

special attention:

Network swap is a systematic project. To finish the whole project, you need the customer’s

help. Therefore, the project team should be well managed and the clear responsibility matrix

should be divided.

According to past experiences, transmission debugging has the greatest effect against the

swap project, because it can only be performed at the swap night. Therefore, you need to

fully communicate with the customer on whether to delay the network integration if the

transmission conditions are not met.

Customers often pay much attention on duration during network swap. For Huawei,

however, to enhance the customer satisfaction rate, engineers should ensure the engineering

duration, quality, and cost.

6.1 Network Integration on the Swap Day

6.1.1 Network Integration Schedule

The following table details the network integration schedule and responsibility matrix.

Time Product Owner Responsibility

The day before sw

ap

Technical sup

port engineers

If on-site engineers need remote support,

technical support engineers should notify the

related department to make preparations in time

and provide the integration solution and data in

advance. Note that the technical support

engineers for network integration include the

RNO technical support engineers.

PM Organize integration coordination meeting,

deciding integration time, and confirm other

precautions with customer, including vehicle

arrangement, test tool, personnel cooperation,

contact method, and internal problem reporting.

Daytime of the

swap day

Technical ow

ner or PM

Hold a meeting participated by all the engineers

related to the project to detail the integration

arrangement, announce the integration time and

contact method.

BTS BTS personne

l/customer

Check if BTS has been in the equipment room



and if the key to the room is available;

Check if all the hardware is present when

arriving at the engineering site and finishing the

related preparations;

Print the integration steps and precautions.

RNP RNP&RNO engineers prepare for DT, confirm

DT data and DT line with the customer, and

assign the DT task to partner.

Each network el

ement

Check the health condition and status of all the

equipment, and check the necessary terminal

tools and components.

Transmission co

nfirmation

Reconfirm the transmission with the customer.

If the transmission conditions are not met,

cancel the integration.

22:00 o’clock of

the swap day

PM or general

technical

support

coordinator

Communicate problems with the customer’

senior management layer.

General coordinator for on-site affairs.

General

technical

support and

experts of

each network

element

Actual integration, problem collection handling,

HQ contact person.

BSS

Integration problem handling and A-interface int

erconnection.

Supervise engineers to enable BTS;

Perform dialing test for CS/PS;

Check if the antennas of some cells are

inversely connected;

Check if it is necessary to use test MS to test the

environment around the BTS;

Check if the frequency information is consistent

with the corresponding cell;

Locate BTS problems.

Monitor alarming information and traffic

statistics.

Monitor and coordinate the implementation

progress.

RNP Monitor the BSS;

Perform CS test;

Collect and analyze the DT data of each region.

MSC Check A-interface interconnection;

Add handover relationship;



Monitoring signaling;

Analyze alarming information.

Analyze traffic statistical data and bill data;

Locate and handle problems;

Monitor signaling.

Cooperate with each other for related test;

Check UMS alarming information;

Coordinate with each other to handle DDF

problems.

PCU Observe the equipment;

Cooperate with each other for related test;

Correct user data;

Check alarming information;

Monitor each registered cell number.

SGSN Gb-interface interconnection and test.

M2000 OMC management;

Problem checking and handling.

The day next to

swap

PM Customer communication;

Integration confirmation

All Watch equipment room;

Check alarming information;

Analyze traffic statistics;

Respond to user complaints.

RNP Continue drive test (data services, such as GPRS

and EDGE, should be tested);

Compare and analyze the data before and after

the drive test;

Optimize related parameters.

6.1.2 Checking Each Network Element (Before Integration)

I. Checking GBSS Running Status

You should record the running status of the system before integration, including the alarming

information, traffic statistics, and the running status of each board and BTS.

1) Query the running status and alarming information of the BTSs attached to the original BSC

and record them. Meanwhile, report them to the related personnel of XXX Company and

require them to solve the problems affecting network integration as quickly as possible.

2) Check the status of each BSC board at the maintenance console and check if the indicator of

each BSC board is correct.

3) Check the status of the relay circuit of the A-interface. The NSS engineers of XXX

Company should cooperate with Huawei engineers to query the status of the relay-circuit of

the A-interface at the MSC side.



4) Check the status of each No.7 signaling link and query the status of LAPD link.

5) Check the status of each enabled BTS, BTS board, and channel. (For example, check if there

is congested channel.)

6) Check the status of special equipments, such as the semi-permanent connection equipment

and timeslot extraction equipment.

7) Check if there is other abnormal condition.

II. Confirming GPRS Status

At the BSC side, you need to check the status of the corresponding LAPD link. If the status is

multiframe setup, the communication between BSC and PCU is normal. You are suggested to

sample some BTSs to check the PDCH status at the maintenance console.

If you need to log in to PCU, you can query the working status of the PCU with the guide

provided by related support engineers according to Appendix 4.

III. Checking the Status of Related Network Elements

The status of the A-interfaces of the MSC and SGSN, the signaling status, and the CPU load must

be checked.

6.1.3 BSC Integration

This section details the work that should be finished in the equipment room.

Work related to BSC

After confirming that the BSC hardware runs normally, you should load the integration data

and check if the status of the BSC is normal after integration. In addition, you need also

check if each BSC board runs normally, if there is important alarm, if the traffic statistical

indicator is normal, and if there signaling is normal.

Work related to A-interface

The A-interface resource is scarce, so you should expand the network capacity at the

integration night. In this case, you need to confirm the transmission for A-interface

expansion and check the A-interface circuit status.

Work related to BTS cooperation

After BSC runs normally, you need to notify the engineers concerned to begin BTS

integration; Confirm the transmission interface of the original BTS; Pay attention to use light

emitting diode to confirm the relationship between transmission and reception; Notify the

engineers concerned that the new BTS and the original BTS can be disconnected. After

Huawei BTS is powered on and the transmission of the BTS becomes normal, you should

check the running status of the BTS at the BSC side. If necessary, you need to force the

related software to be activated. If any problem is found, you can coordinate the BTS

supervisor to solve the problem together.

Work related to MSC coordination



Confirm that the data of the location area of the corresponding MSC has been set.

Check if the traffic statistics, alarm, and maintenance function of the M2000 network

management system are normal.

Register and observe traffic statistics

Generally, the following tasks should be registered at the traffic statistics console, including

BSC overall performance measurement, CPU performance measurement, MTP link

performance measurement, SDCCH performance measurement, TCH performance

measurement, random access performance measurement, intra-cell handover performance

measurement, power control performance measurement, call drop performance

measurement, Rxqual performance measurement, Rxlev performance measurement, cell

performance measurement (2), cell performance measurement (3), TRX call drop

performance measurement, and A-interface relay performance measurement.

Register the traffic statistical tasks reflecting KPI at the MSC and SGSN.

Alarm query and analysis; alarm solution; abnormal alarms related to BSS; important alarms

related to BSC.

Check the status of the corresponding network element is normal.

Cooperate with the related engineers to handle BTS problems.

Cooperate with the related RNO engineers to correct data.

Record abnormal problems.

6.1.4 MSC-Related Work during BSC Integration

I. Debugging A-interface

The A-interface data should be debugged at the night (from 23:00 to 3:00). In addition, you should

test if the MS can access the network and if the location update and handover can be performed

normally. The overall dialing test contains various services, including intra-office call, calls

corresponding to each handover, toll call, and intelligent service. Moreover, you should verify if

each call procedure is correct.

II. Integrating BSC after A-interface Debugging

To ensure that the transmission between BSC and Huawei MSC is available, you should perform

overall dialing test. The test contains various services, including intra-office call, calls

corresponding to each handover, toll call, intelligent service, call transfer, etc.

If there are multiple BSCs to be integrated, you can perform the integration by steps. During BSC

integration, you need to pay attention to the following points:

If several BSCs belong to the same MSC in the original network, the BSCs must be

integrated to the new MSC in one time.

The handover data applied to the old MSC and new MSC must be adjusted.

During the integration, both the old and new MSC are valid. In this case, you should

preserve adequate inter-change circuit according to the traffic between the old MSC and new

MSC.



III. Conclusion

Hereunder summarize the MSC-related work needs to be done during GBSS integration. The

seamless cooperation between MSC and GBSS is the key to a successful swap.

1) Test phaseThe customer needs to prepare redundant E1 for A-interface. The E1 must be interconnected

with Huawei BSC when the BSC and BTS are powered on. The data related to Huawei BSC

must be added to the core network and interconnected with A-interface. Note that all the

services must be tested.

2) Integration preparation

Huawei is responsible for BSC-side transmission, and the customer is responsible for

transmission layout and debugging from core network to DDF rack.

The data related to BSC integration must be made at the core network.

Adjacent cell relationship must be designed before the swap of BSC and MSC. If there is

cross-MSC cell, you need to design the adjacent cell relationship at other MSCs.

If some BTSs are not successfully swapped, you need to recover the data and adjacent cell

relationship related to the corresponding BTSs.

If new LAI is used, the new LAI must match the charging information and intelligent service

if the information and service are available.

3) Resource requirements at the core network Switching side personnel

DDF rack

Power supplier

Relay device (2M)

Relay signaling

Test card and test MS

Dialing personnel

Personnel cooperating with the modification of MSC-related data

Pre-paid service debugging and voice resource test

6.1.5 BTS Integration

BTS integration involves multiple scenarios. Whether there is adequate room for BTS installation,

whether there is standby transmission equipment, and whether the direct current power supply is

available are three main factors affecting the BTS integration. The antenna feeder does not affect

the integration because it will not be installed at the integration night. Eight possibilities are

included in the three factors. Hereunder details the BTS integration:

Disassemble the original BTS. The disassembly has no side or negative effect against the

network.



Prepare the related tools and vehicles before integration. After the arrival of the integration

team, the BTS door should be opened and the light in the equipment room should be

enabled. In some special cases, engineers must get the permission of the third party before

entering the equipment room, so you should explain this to the customer and make

preparations in advance.

Only the direct current power supply cabinet is discussed in this document. For alternating

current input, you need to communicate with the customer in advance.

To enhance working efficiency and increase test time, you must finish the related work

before integration.

In some places, you have to move not only the BTSs to be swapped but also other networks

or power supply equipment. In this case, you need to communicate with the customer on this

action.

The partner is always responsible for BTS integration, so you must take measures to ensure

the engineering quality

I. Installation Steps

This section introduces the steps to install the BTS when no standby transmission, no power

supply cabinet used for replacement, and no position restriction.

After the arrival of the BTS, you need to check the places where the power supply cable is long or

the transmission needs to be re-arranged in advance.

1) After confirming the BSC port, confirm that the BTS-side transmission port is correct

through self-loop test.

2) Disconnect the power supply of the BTS and move out the original power supply cabinet and

BTS. When moving out the BTS, you do not have to move the connection line and antenna

feeder so that that the BTS can be changed back to the original position in emergency

conditions.

3) Finish installing Huawei power supply cabinet, power on the cabinet with alternating

current, and observe the running status of each module. After that, disconnect the power

supply.

4) Install Huawei BTS at the corresponding location; connect the transmission line, power

supply cable, and grounding line. If the time is urgent, you do not have to fix the BTS and

secondary installation is allowed.

5) When Huawei BTS is powered on, observe the status of the indicator.

6) Connect transmission to Huawei BTS and check if the status of LIU1 is normal. After the

transmission is normal, check if the BTS runs normally. During this period, do not

disconnect the power supply of the BTS. If software needs to be upgraded, you need to

notify the BSC to upgrade the related software or perform near end upgrade.

7) After the BTS runs normally, you can connect the jumpers and the lightening protector. If

the time is urgent, you do not have to fix them and secondary installation is allowed.



8) Finish the standing wave test from the CDU interface is necessary. No instrument can be

used to observe the standing wave indicator of the CDU.

9) After the BTS is initialized, perform dialing test and handover test. In addition, you should

test power and confirm cell direction. Other ATP tests can also be performed.

10) If all the test results are normal, you should perform drive test for network optimization. If

there is no problem, it means that you have succeeded in integrating the network.

11) For the convenience of network maintenance, you should paste labels for the corresponding

cells.

12) Finish connecting the match heads and EAC; install the sensor; and test the EAC connection

and function.

13) Install battery or battery rack.

14) If the drive test results are normal, it means that the BTS has been successfully integrated.

15) Package the old equipment if necessary.

16) Collect the test record and tool; tidy up the engineering field, and return the key.

II. BTS Swap Steps

Hereunder provides a swap example, which specifies the BTS swap steps:

1) Shut down the original BTS

When arriving at the engineering field, the BTS integration team should phone the transmission

changeover team and shout down the power supply of the original BTS. Generally, this action is

taken at 00:00 or later.

In this case, Huawei should wait for the xx company to make preparations, and the xx company is

responsible for shutting down the original BTS.

2) Integrate BTS power supply

After confirming that the polarity, voltage, and label of the power supply are correct, you can

connect the power supply to Huawei BTS.

In this case, Huawei is responsible for providing power cable and putting the cable near the

equipment room, and the xx company is responsible for removing the power supplier of the

original BTS and connecting the Huawei BTS power supplier.

3) Integrate Abis interface relay

Disconnect the Abis interface relay (2M) from the original equipment and connect it to Huawei

BTS through DDF rack.

In this case, Huawei is responsible for providing the transmission from BTS to DDF rack, and the

xx company is responsible for removing the transmission between the original BTS and BSC and

connecting it to the DDF rack for Huawei BTS.

4) Check BTS installation and power-on the BTS



After the power supplier and transmission are connected, you need to confirm that the Huawei

BTS is well installed, and then power-on the BTS. Huawei BTS will send loading application to

BSC after performing self-check.

In this case, Huawei is responsible for checking the BTS installation, powering on the BTS, and

testing the BTS transmit power. (The connector of the lightening protector is the test interface, so

you need to check if the power fluctuates at each connector, because the power should keep stable.

Note that digital power meter is preferred.). And the xx company is responsible for cooperate with

Huawei in the test.

5) Dial test phone

After the BTS has finished loading data automatically and all the cells are available, you should

perform dialing test. The called numbers are decided by test engineers. Ten calls should be made

for each cell. Finally, you need to send the test results to the BSC maintenance team.

In this case, Huawei needs to cooperate with the test engineers to solve problems occurred during

the test, and the xx company should perform the dialing test according to plans and confirm the

BTS working status.

6) Integrate antenna feeder system

After the dialing test, you can integrate the antenna feeder system. That is, remove the indoor soft

jumper of the original antenna feeder and connect the corresponding antenna feeder to Huawei

BTS.

In this case, Huawei is responsible for providing BTS interface for the jumper and finishing

standing wave test. (The test interface locates at the CDU antenna connector. so you need to check

if the standing wave ratio fluctuates at each connector, because this ratio should keep stable.).

7) Check drive test

After all the BTSs are integrated, you can perform drive test for them. The test contents include

cell direction, signal strength, handover, and interference.

In this case, Huawei RNO engineers should perform drive test to check the coverage quality, and

the xx company should provide vehicles and cooperate with Huawei RNO engineers in the drive

test.

8) Analyze the integration

To have an overall understanding of the network after integration, you can analyze the drive test

results. The test results can work as reference for next-phase network optimization.

In this case, Huawei is responsible for analyzing the coverage quality after BTS integration and

providing reference data for the next-phase network optimization, and the xx company is

responsible for analyzing the network quality after BTS integration and putting forward network

optimization requirements.

9) Deal with original BTS



Huawei engineers are not responsible for dealing with the original BTS. The xx company is

responsible for dealing with these old goods either by themselves or with the help of the third

party.

6.1.6 PCU Integration

Pb interface (it is defined by Huawei) connects PCU to BSC. Before integrating PCU, you need to

debug the Pb interface. For details, see the related deployment guides.

I. Gb Interface Integration Steps and Precautions

1) Check Gb interface data configuration, including E1 configuration, BC configuration, NC-

VC configuration, and cell configuration.

2) Check hardware connection to make sure that the Gb interface board is inserted at the right

position.

3) Test transmission self loop to make sure that the E1 line is correctly configured for Gb

interface.

4) Check E1 connection. If the green light of the PMC board flashes slowly, the E1 connection

is normal.

5) Check BC state through “mt fr bc show statinfo all”. If the link consistency check is

available and the user is not blocked, it means that the BC state is normal.

6) Check the NSE state through “MT BVC SIG SHOW <NSEI>” to see if it is normal.

7) Check the NSVC state through “mt nsvc showstate <NSEI><NSVCI>”. If the NSVC is

unlocked, it means that it is normal.

8) Check the Signal BVS state through “mt bvc signal show state <NSEI>” to see if it is

normal.

9) Check the PTP BVC state through “mt bvc ptp show state <NSEI> {<BVCI>|all” to see if it

is normal.

II. Traffic Statistics Indicator Registration (PCU)

You are suggested to register traffic statistics indicators related to PCU. The seven indicators

reflecting the running condition of PCU must be recorded, including BSC overall performance

measurement, Pb interface performance measurement; G-Abis interface performance

measurement, Um interface performance measurement, etc. The six indicators reflecting the cell

details are recommended. For the following indicators, the ones in black must be registered, and

the others are optional.

CPU measurement

BSC overall performance measurement

G-Abis interface performance measurement

Pb interface performance measurement



Cell performance measurement: packet assignment performance measurement; uplink TBF

setup and release performance measurement; downlink TBF setup and release performance

measurement; PDCH resource performance measurement; PDCH peak value performance

measurement, uplink RLC data transmission performance measurement, downlink RLC

transmission performance measurement, radio channel performance measurement, resource

maintenance performance measurement.

6.1.7 Network Optimization Arrangement

The test performed at the swap night is to check if the services are normal and if there are serious

problems.

DT lines should cover each cell and the areas covered by the major lobes of the cells. At least the

bi-directional handover between the edge of one cell and its adjacent cell should be tested. Since

the network integration is often performed at the night; you may not access some areas or section.

In this case, you should plan the DT line in advance.

According to the DT, the coverage should become better after network integration. In addition,

cell parameters should be correctly set, and the frequency and handover should be normal. If some

adjacent cells are missing or the antenna feeder is inversely connected, you should contact the

project team immediately.

The baseband frequency hopping will stop if there is any TRX problem. Therefore, if you

discover the problem of this kind during the test, you should contact the project supervisor

immediately.

In addition, you should check if the GPRS function is available for the GPRS cells.

Note:The RNO team and project team should tell each other the contact persons responsible for the

integration in advance. After enabling the BTS, the project team should notify the standby DT

team to perform drive test. And the project team should wait for the DT results. If the DT team

finds any problem, they should tell the project team to solve the problem immediately. If the

project team has multiple BTSs to be swapped at that night, the nearby BTSs should be swapped

first. In this case, the project team should notify the DT team to perform the drive test after the all

the BTSs are swapped. And the project team should still be present in the field to wait for the DT

results.



6.2 Emergency Measures and Changback for Network Integration

6.2.1 Emergency Measures

I. Emergency Measures for BSC

If you meet difficult problems, you can seek help from the technical support engineers of Huawei

to locate the problem. Meanwhile, BSC supervisor must monitor the data such as interface

messages and BTS log for further analysis. If the problem cannot be solved within the time

required by the customer, you should change back the transmission to the original BTS; otherwise

normal communication will be terminated.

II. Emergency Measures for BTS

If you find any problem concerning BTS transmission, you should notify the problem to the

engineers responsible for guaranteeing transmission.

If there are bad components or boards, the BTS emergency group must replace them immediately.

If the Operation and Maintenance Link (OML) or Radio Signaling Link (RSL) cannot be

established, you should contact the engineers responsible for BSC integration immediately.

6.2.2 Changeback Principle Description

You need to confirm the time and condition of changeback. Generally, the changeback can be

divided into BTS changeback and BSC changeback. BSC changeback should be performed before

BTS changeback, so the BSC changeback is a relatively easy task. It is important to find problems

through changeback and solve them accordingly for subsequent operation.

When designing changeback solution, you need to back up the data to be modified for the original

BSC and MSC. During network swap, you are suggested not to modify and delete other data

except the data of the original BSC and the adjacent cells, because this is convenient for secure

changeback. During changeback, you should pay attention to the following points:

Export the frequency planning data (including frequency hopping, BSIC, etc) according to

the backup data of the original network because the data will be used for the changeback. If

there is changeback failure, you need to check the frequencies planned at edges.

If the whole swap fails, you can completely use the backup data for the adjacent cells. If the

swap for some of the sites fails, you need to design new data for the edge adjacent cells and

modify the corresponding adjacent cell relationship between the original BSC and Huawei

BSC.

The planning data, such as LAC and CI, should be exported according to the backup data

during changeback, because the planning data should be modified in the MSC. When the

swap for some of the sites fails and if the planning data such as LAC and CI is different from

that in the original network, you need to decide if the LAC and CI should be changed back to

the original ones; otherwise the network will be negatively affected.



If the BSC-related data used in the original network does not have to be deleted, you can use

the backup data.

The concatenation BTSs should be changed back.

The data related to the changeback BTSs should be modified in the MSC.

6.2.3 Changeback Measures

I. BSC Changeback

Generally, BSC can be debugged and interconnected successfully in advance, but the possibility

for you to test the network at the integration night is small, because the time is urgent and the

preparations are inadequate. In addition, some important functions are not supported, the

important boards fails, or the customer’s A-interface is not in due position.

1) If all the BSC is changed back and shares one MSC with the original BSC, you should do the

followings:

Ensure the A-interface transmission of the original BSC

Recover the data of the original BSC

Recover the MSC data

Recover the data of the BTSs under the control of the original BSC

2) If all the BSC is changed back and uses another MSC, you should do the followings:

Ensure the A-interface transmission of the original BSC

Recover the data of the original BSC

Recover the data of the two MSCs

Recover the data of the BTSs under the control of the original BSC

II. BTS Changeback

If BTS integration fails, it should be changed back to the original status. If the new BTS cannot be

opened at the 5:00 a.m or the coverage performance decreases rapidly according to drive test, the

BTS should be changed back before 6:00 a.m. In this case, you should do the followings:

Reset the BTS, power supply, and antenna, and check the working status of the BTS.

Reset the transmission.

Modify the neighbor cell relationship between the original BSC and Huawei BSC.

If the two BSC does not belong to one MSC, the inter-MSC handover relationship will be

present.

If the CGI is used for route analysis in the MSC, you need to modify the related data.

For the convenience of problem location and analysis, Huawei BTS engineers should record the

details and test data, and the BSC supervisor should monitor and save the corresponding data.



6.3 Network Monitoring on the Day Next to Swap

The network monitoring on the day next to swap is quite important. You should arrange engineers

to monitor the traffic statistics closely and pay attention to the fluctuation of each indicator and

customer’s complaints. If there is abnormal conditions, engineers should analyze problem from

the following perspectives:

Check if the history alarms of the BTS and BSC are normal, because failures related to

transmission, antenna, and board will affect KPI and result in complaints.

Check if the traffic volume in each cell is normal and if there is no traffic at some sites.

Check if the important indicators, such as call drop rate, handover success rate, and

congestion rate are normal.

Check if the success rate of the handover between different customers’ equipment is normal.

Analyze the customer’s complaints and solve them. After solving the problems, you should

notice the customer immediately. In addition, you need to create a history record for the

complaints to make sure that no problem will be missing.

If no problem is found, the project team should feed back the results (including traffic statistics,

drive test, and dialing test) to the customer. In this case, it can be taken that the network has been

successfully integrated.

Chapter 7 After-Swap Network Quality Monitoring and

Optimization

To ensure that the final network acceptance can pass, you should strictly monitor the network

quality for a period of time after the swap. The tasks involved in network monitoring include

online equipment problem handling, network monitoring, and network optimization.

7.1 Online Equipment Problem Handling

7.1.1 Hardware Problem Handling

The hardware problems occurring after swap must be handled immediately; especially the BTSs

providing converge for VIP areas should be more carefully monitored.

When the project team handles the coverage problems, such inverse connection of antenna feeder

and poor Rxlevel, network optimization supervisor or project supervisor should confirm that the

problems are really solved. To solve conversation problem caused by board failure, you need to

block the OMC and check the utilization of channels and signaling.



No alarm will be generated if the performance of some hardware decreases. Once discovering

such problem, network optimization engineers should solve the problem with the coordination of

BSS engineers.

If the traffic volume of a cell is low, the problem may be related to uplink and downlink.

If the channel utilization rate is low, call drop rate is high, and there is great interference, the

problem may be related to the decrease of the TRX performance and combiner and divider

performance.

7.1.2 Complaint Handling

Users’ complaints must be handled quickly. Generally, complaints can be divided into the

following categories:

Coverage complaints

Voice quality complaints (one way audio, no audio, cross-talking, call drop, echo, noise, etc)

Service failure complaints (incoming call failure, outgoing call failure, fax service

unavailable, etc)

PS complaints (slow network connection, GPRS service unavailable, etc)

7.1.3 Alarm Analysis

I. BSS-Focused Abnormal Alarms

The following table lists the alarm names according to BSC32.

Alarm ID Alarm Name Remark

62 Signalling link layer 2 congestion alarm Signaling alarm65 Destination signalling point unavailable alarm

84 Signalling link layer 3 congestion alarm

86 Signalling link unavailable alarm

107 SCCP remote signalling point failure alarm

113 SCCP destination signalling point forbidden alarm

626 Signalling link service interruption alarm

627 Signalling link location failure alarm

311 Digital relay PCM failure alarm Relay alarm

545 Internal flow class change System load

547 Cell flow control class change Cell load

559 BSC reset alarm Circuit failure560 BSC reset acknowledgment alarm

562 BSC reset circuit alarm

571 MS reset alarm

572 MSC overload alarm

605 BSC unequipped with circuit alarm



612 MSC unequipped with circuit alarm

695 GCKS clock 10 minutes deviated from reference time Clock source failure696 GCKS clock 24 hours deviated from reference time

II. Important MSC-Related Alarms

The important MSC-related alarms are A-interface relay circuit alarm, signaling link alarm, BSC

overload alarm, and BSC reset alarm.

7.2 Network Monitoring and Optimization

After swapping the network, you should closely monitor the feedbacks from the customers or

users. Generally, users are quite sensitive to the network quality several days after the network

integration and may put forward subjective feelings. For example, they may complain that they

cannot make calls in the rooms where the signals were weak before the network integration. Or

they may also complain that there is great noise, the success rate of the fax service is low, and the

data service is unavailable. The reasons for the problems are that the coverage sensitive area

decreases, or the network parameters are irrationally set, or the cooperation between operators’

parameters are not satisfactory. These problems must be solved as quickly as possible. If the

decrease of the coverage area is caused by improper planning, you need to change the planning

accordingly immediately. Note that you should pay special attention to antenna adjustment;

otherwise new coverage problem will be introduced. To prevent sensitive problems from causing

great negative effect, you need to notify marketing personnel to maintain good customer

relationship.

7.2.1 OMC Traffic Statistics Analysis

You can discover the problems of the original network through monitoring and analyzing the daily

traffic statistics. During this period of time, you should try to register as much as traffic statistics

that are used for network optimization. In addition, you should pay special attention to the traffic

statistics related to traffic volume, congestion, call drop, handover, and interference. Furthermore,

you also should compare the traffic statistical indicators before and after network swap. If an

indicator becomes worse after swap, you should find out the reasons and improve it.

I. KPI Analysis (Voice Service)

In addition to the call drop rate, congestion rate, and handover success rate (for cell-level

indicators), you are suggested to pay attention to the following traffic statistical indicators.

For TRX-level indicators, you should check the assignment and utilization of SDCCH and TCH in

the channel allocation performance measurement and discover the abnormal TRXs immediately.

For the statistics in the path balance performance measurement, you need to monitor the uplinks

and downlinks of the corresponding TRX.



You should integrate the Rxlevel performance measurement and Rxqual performance

measurement into consideration, and can analyze the coverage provided by radio signals and also

analyze the interference caused by the radio signals as well.

For the networks with high load, you are suggested to check the signaling link send occupation

percentage (%) and signaling link receive occupation percentage (%) in the MTP link

performance measurement, because these two items indicate the signaling load at the A-interface.

If the values of the two indicators reach 30% respectively, the signaling link will be congested or

signaling may be losing. In this case, you should suggest the customer expand the network.

In BSC overall performance measurement, if the PCH overload times for circuit service at the

Abis interface and the RACH overload times for circuit service at the Abis interface are great, you

should consider readjusting the paging parameters or redividing the location areas.

In LAPD performance measurement, if both the pages discarded due to serious LAPD link

overload and pages discarded due to slight LAPD overload are not 0, it means that the flow

control has been happened during the statistical period.

For the network side, you need to check the following changes.

If the average timeslot occupation time is quite short according to A-interface relay performance

measurement, it is likely that the A-interface relay is inversely connected or mismatched. In this

case, users cannot hear the opposite party’s voice, and then hang up. Therefore, each conversation

only lasts for a short period of time.

The cause values of the inter-BSC outgoing handover failure in cell performance measurement (3)

can be divided into multiple types and they can be used for the analysis of inter-BSC handover.

II. KPI Monitoring (for Each Swap BTS)

You can use NASTAR to monitor the change of the KPIs before and after swap (the traffic data of

the original network should be collected and input into the NASTAR in advance). To discover

problem in time and prevent the traffic fluctuation from reducing analysis deviation, you are

recommended to use the all-day KPIs (24 hours). And you should pay special attention to the

traffic volume, call drop rate, and handover success rate. If there is abnormal case, analyze and

handle it immediately. At last, you need to export a KPI monitoring daily report.

III. KPI Analysis (Packet Service)

The daily GPRS network monitoring is responsible for the monitoring of data throughput,

transmission performance, accessibility, resource utilization rate, and retain ability. The following

table lists the GPRS KPIs.

Data Throughput Downlink NS_PDU mean throughput (kbps)

Transmission

performance

Uplink RLC data block retransmission rate (%)

Downlink RLC data block retransmission rate (%)



Uplink EGPRS RLC data block retransmission rate (%)

Downlink EGPRS RLC data block retransmission rate (%)

Accessibility

Uplink assignment success rate

Downlink assignment success rate

Mean interval for packet access request initiated on CCCH (s)

Uplink TBF congestion rate (%)

Downlink TBF congestion rate (%)

Uplink EGPRS TBF congestion rate (%)

Downlink EGRPS TBF congestion rate (%)

Resource

utilization rate

Uplink PDTCH/PACCH utilization rate

Downlink PDTCH/PACCH utilization rate

PDCH utilization rate

Success rate for BSC to reclaim overload dynamic PDCH

PDCH allocation success rate

Mean downlink throughput per PDCH (kbps)

Mean uplink throughput per PDCH (kbps)

Retain ability

Uplink GPRS TBD call drop rate (%)

Downlink GPRS TBF call drop rate (%)

Uplink EGPRS TBF call drop rate (%)

Downlink EGPRS TBF call drop rate (%)

For details, refer to GPRS Traffic Statistics Analysis Guide.

7.2.2 Analysis of NSS-Related Radio Indicators

I. Paging Success Rate and Location Update Success Rate

One-time page and subsequent pages cannot be told from each other according to the Abis

interface circuit pages measured by BSC, so you are suggested to obtain the one-time paging

success rate from the MSC. If the paging success rate is low, you need to check the location

update success rate measured by the MSC and perform further analysis.



II. Signaling Load

When analyzing the A-interface signaling load measured by the BSC, you need to check the

signaling load measured by MSC. If the load is heavy, you should discuss with the customer on

whether to expand the signaling link.

III. Intra-MSC Handover Success Rate

If the inter-BSC handover success rate is low, you need to check the intra-MSC handover success

rate or inter-MSC handover success rate.

7.2.3 Analysis of Area DT and CQT and Related Suggestions

The optimized DT lines include but are not limited to the DT lines evaluated before swap. For the

convenience of comparison, you are suggested to use the same DT line, test instrument, and

vehicles for drive test. Note that the position of MS antenna and that of the vehicle mounted

station must keep consistent before and after the swap. In addition, the test should be performed at

the same time in a day.

You should perform corresponding optimization according to the drive test, and then compare the

final DT results with the predicted results. Finally, you should output a network comparison

report.

CQT should be performed for VIP areas and the network quality in the VIP areas must become

better after swap. After CQT, you need to further optimize the network.

7.2.4 After-Swap Network Maintenance

NASTAR, GSM network optimization software developed by Huawei, can be used to monitor the

daily network performance (it can output daily report, weekly report, half-monthly report, and

monthly report). In addition, NASTAR can also be used for frequency analysis, adjacent cell

analysis, performance analysis, and geographic location display.

A specialist should be arranged to update the data for NASTAR according to the change of the

network, and the specialist should check the data with the customer periodically.

Traffic data should be sent back to the performance service platform of the regional division for

analysis and handling.

For details, see NASTAR Operation Guide.

7.2.5 Network Optimization

The following tasks are involved in network optimization:

Adjust and optimize BTS coverage area

Adjust and optimize the interference between adjacent cells or frequencies.

Set and adjust adjacent cell relationship

1) Adjust and optimize handover parameters



Prepare dialing test for the cells in which frequency hopping is available

2) Register traffic tasks, monitor and optimize network performance after swap, and check the

change of KPIs.

7.3 Customer Communication

When analyzing and handling network problems, you need to communicate with customers in

time, seek help from them, and notify the results to them in time.

Chapter 8 Swap Acceptance and Document

Transformation

Swap acceptance is based on equipment acceptance. Generally, rough acceptance solution should

be decided in the communication with the customer at the early stage. Swap acceptance includes

preliminary acceptance and network performance acceptance and should be implemented

following the contract strictly.

8.1 Preliminary Acceptance

After the equipment has been running normally for a period of time, you can apply for

preliminary acceptance.

The project supervisor can cooperate with the customer’s engineers to test some indicators during

installation and commissioning. And the test data can be used for the preliminary acceptance if it

is acknowledged by the customer. The project supervisor and the customer should perform the

preliminary acceptance together. If necessary, the customer relationship manager, service

manager, and project manager can be invited to join the acceptance.

The customer’s signature is required for each test item included in the preliminary test.

For the problems which have not been solved yet, you should communicate with the product

manager of the corresponding representative office on them. And the problems cannot be recorded

in the acceptance report. Instead, they should be0020recorded in the project memo.

On the completion of the preliminary test, the customer should leave signature and seal on the

project completion acceptance certificate and system preliminary acceptance certificate.

8.2 Network Performance Acceptance

After the network is monitored for a period of time and all online problems are solved, you can

perform network performance acceptance together with the customer.



Network optimization acceptance is divided into traffic statistical acceptance and drive test

acceptance. Before the test, you should collect and evaluate network information in advance and

make rational acceptance standard based on the evaluation. If the network to be accepted is large,

you can divide the network into several smaller areas and preformed the acceptance accordingly.

For details, refer to RPO202-04 Network Optimization Acceptance Standard and Method (G).

8.3 Document Transformation

On the completion of whole swap acceptance, you should transform the documents for

engineering, acceptance, and maintenance to the customer.

Chapter 9 Swap Risk Analysis

GSM network swap is a complex and systematic project, because the duration is long, many

products are involved, and the project scale is large. Therefore, any irrational plan and improper

operation will cause unexpected results. To control risks, this chapter introduces the methods to

predict and evaluate the risks.

From the perspective of customers, they care about the duration most. From the perspective of

Huawei, however, besides the duration, it also cares about engineering quality and cost. According

to the current experience, there are following risks:

The network indicators fail to reach the standard specified in the contract after swap.

The coverage area decreases after swap.

Network integration fails due to unavailability of transmission.

Duration delay is caused by inefficient communication.

9.1 Network Information Collection and Risk Evaluation

9.1.1 Risks Caused by Inadequate Understanding of the Performance of the Original Equipment

[Risk description]

The risks are caused by inadequate understanding of the performance of the original equipment.

[Solution]

You should gain a full understanding of the network before swap. If there is coverage problem,

you should test power first or communicate with the customer and marketing department on

whether to swap the network.



9.1.2 Risks Caused by Inaccurate Information

[Risk description]

The project parameters and network parameters provided by the customer may be inaccurate. As a

result, risks may happen during project implementation.

[Solution]

Before swapping the network, you should check and evaluate if the information is valid.

9.1.3 Case Study

I. Case 1: Indoor Coverage Configuration Problem

An operator uses macro cell and distribution antenna system for indoor coverage. The distribution

antenna system has no diversity receive antenna and is connected to the BTS with one feeder.

However, double CDUs are used according to Huawei BSS configuration, so two feeders must be

configured. Therefore, Huawei equipment cannot be connected to the distribution antenna system

of the old network. To solve the problem, engineers have to change the contract configuration. In

this case, SCU and CDU are used.

II. Case 2: Customer Complained that the Coverage Area Became Smaller after Huawei Used BTS3002C to Replace Company N’s Outdoor BTS

According to on-site engineers’ analysis, company N’s outdoor BTS was small in size, which

looked like small BTS. Therefore, the project supervisor took it for another BTS whose power

was 10W. According to later measurement, the actual power of the BTS was 34W, but the power

of the Huawei BTS3002C was 20W.

III. Case 3: Repeaters Caused High Call Drop Rate After Swap

According to traffic statistics, the call drop rate was high for the cells covering the countryside. It

is found that these cells have repeaters. All the repeaters were wireless, some of which were

broadband repeaters, and some of which were frequency selective repeaters. The information

related to the repeaters was not fully collected before swap, so the adjacent cell relationship

between the repeaters and neighboring cells was improperly designed. As a result, high call drop

rate occurred. Especially because of the capacity expansion or frequency change after swap, the

calls controlled by frequency selective repeaters will certainly drop.

In the following case, the call drop rate will also rise.

If a call hands over from a repeater cell to a neighbor cell under the control of the same BTS, the

path difference of the source cell and target cell is great. In this case, if the repeater cell is set to

synchronization handover cell, the TA value cannot be adjusted after handover. As a result, call

drop will easily occur. To solve the problem, you need to change the repeater cell to asynchronous

handover cell.



IV. Case 4: Coverage Area Became Smaller Due to Lacking Understanding of the Movable BTS Used in the Original Network

The customer complained that the call quality at a road section was poor after network swap.

According to field survey, it is found that no strong cell was present within this section and the

interference between signals was serious. The call quality was still unsatisfactory even through

adjusting the antennas and frequencies of the surrounding cells. According to further analysis, the

reason was that a movable BTS was used for the coverage of this section. At last, Huawei closed

the movable BTS and installed a new BTS for this section. And the problem was successfully

solved.

V. Case 5: Frequent Intermittence Occurred After Company N’s BTS was Replaced by Huawei BTS3006A

Huawei BTS3006A is configured with 5 PSU power supply modules and the capacity of the

standby battery is 650AH/24V. In addition, 6750W of DC power and 7500W of AC power are

available for BTS3006A. However, in that area the power supply cable was made of aluminum. In

addition, the cable was long and the loop impedance was great. Especially great power was

needed when the battery was in charge. In this case, the power supply system may not be normally

started. Since the difference between the transmit power, battery capacity, and power supply

module of the old equipment and that of the new equipment was great, the AC input power of the

original equipment was required to be lower than that of the BTS3006A. To solve the problem,

engineers reduced the AC power requirement of BTS3006A through changing the charging

current of the power supply module and battery. After that, BTS3006A ran normally.

If you meet problems of this kind later, you should check the power supply network and

communicate with the marketing engineers on the power supply requirement of Huawei

equipment.

VI. Case 6: Information of the Original Network was Not Fully Collected and Analyzed

[Problem]

It was found that the A-interface circuit is inadequate when Huawei BTS was used for a swap

project, which prolonged the project duration. To ease the traffic pressure, the related engineers

expanded the capacity of the A-interface.

[Reason analysis]

The traffic models of the original network were not fully collected and the predict traffic volume

was inconsistent with the actual traffic volume. As a result, the capacity of the A-interface circuit

was inaccurately estimated, and thus the project duration was prolonged. Therefore, the customer

began to doubt Huawei engineers’ capability.

[Reflection]

The traffic information of the original network should be fully collected before swap and provide

the solutions of A-interface expansion to the customer in advance. Though it is GBSS swap, but



the information related to NSS, especially the information related to MSC should be noted and

monitored.

VII. Case 7: The Longtitude and Latitude of the BTS were Not Fully Checked

In a network swap project, engineers failed to check the longitude and latitude of the BTS fully.

After the completion of the project, it is found that the several BTSs were locating in the areas

covered by other BSCs. Therefore, the network structure was irrational. After that, the engineers

had to perform rehoming operation.

VIII. Case 8: The Mark of A-interface Was Not Verified

In an area, the customer found that the mark of the A-interface provided in the interconnection

parameter table is Phase 2, but it was Phase 2+ after network integration. If engineers do not

change the mark immediately, many problems will occur.

9.2 Project Survey, Equipment Installation and Commissioning

9.2.1 Interconnection Risks

[Risk description]

If the MSC of the original network is not provided by Huawei during GBSS swap, engineers may

find it hard to perform IOT test. In addition, if the customer conditions are not met or the

customer does not cooperate with the swap project, the engineering duration will be delayed.

[Solution]

Invite related customer relationship manager, service manager, marketing personnel, and PM

to persuade the customer to cooperate with the swap project actively.

Check the environment of the engineering field in advance to ensure that the equipment

installation and commissioning can be finished within the schedule.

Seek help from technical support engineers.

9.2.2 Problems Related to Interconnection of GBSS and G9

The following table lists the similar problems.

No. Problem Description Solution

1 Clock problem caused by G9

integration

BTS clock is installed outside of the UMG

and IP should not be used for clock

transmission.

2 Decrease of CSSR (call setup success

rate) caused by G9 integration.

Enhance A-interface utilization rate through

late assignment.



9.2.3 Risks Concerning BTS Survey

[Risk description]

In some cases, the antennas of the original network can be reused, but the antenna connector does

not necessarily match the transmission connector, or the capacity of the power supply cannot meet

requirement. If the previous information is not fully checked before the launch of the project, the

project duration will be delayed.

[Solution]

You should confirm the swap project with the customer in detail. If necessary, you should survey

some of the BTSs. If there is any problem, you need to communicate the problem with the

customer and solve the problem immediately.

9.2.4 Quality Risks Caused by Project Installation Team’s Engineering Level

[Risk description]

At present, many project teams are green hands. They may pursue progress while neglect the

engineering quality. And this problem is commonly seen in overseas projects.

[Solutions]

Product manager should have serious quality consciousness.

Experienced project teams are preferred.

The corresponding representative office should exert strict management on the partner.

Perform strict quality management.

Take measures to solve problems quickly and exert penalty on the responsible party if

necessary.

On-site project supervisor should perform careful self-check after engineers finish installing

the hardware and before the equipment is enabled, especially the set-top power and TRX

power must meet requirement and the cell direction must be correct.

In overseas, corresponding trainings must be provided to the local project team. The

trainings should cover operation rules and flows. And the project supervisor is responsible

for guide the project team to install the project according to rules and flows.

The project team should sample some BTSs for quality check.

The corresponding regional division and representative office should routine check the

engineering quality.

Trainings should be provided to the project teams whose techniques have much to be

improved.

The project supervisor should cooperate with the project manager to monitor the network

quality and supervise the project team to follow swap procedures.

9.2.5 Version Risk

[Risk description]



With the evolution of GSM network, many new functions are used, such as half rate and AMR. If

engineers do not understand the functions of the original network or the functions provided in the

contract, the project delivery date may be delayed, and this is especially true at the NSS side.

[Solution]

The on-site project team should check the functions provided in the contract strictly and

communicate with the customer to understand the functions of the original network. In addition,

the features of the current version should also be thoroughly understood.

If the version is available, you can confirm the features of the version from the related

technical owner or the technical support department.

If the version is not provided, you can confirm the features of the version from the product

manager, marketing (CCM) and the general office of the regional division.

The confirmation of functions and needs should be fulfilled in the electronic process of the

requirement and commitment, and each electronic process should be monitored.

The information of the version is inconsistent with the version; you should reach an

agreement with the front marketing and R&D departments.

The plans provided in the version should be listed into the general project plan.

9.2.6 Case Study

I. Case 1: BTS Could Not Run Normally Due to GSM/CDMA Common Transmission

There was alarm generated for a cell of a BTS after network swap and the BTS could not work

normally. However, it could work normally after changeback. According to field survey, engineers

found that this BTS was used for both GSM transmission and CDMA transmission. The network

was expanded after the swap, and thus the transmission resources are inadequate. Therefore, the

BTS could not run normally.

II. Case 2: BTS Clock Synchronization Problem Cause by GSM/CDMA Common Transmission

The clock of the GSM BTS could not synchronize the upper level clock when GSM BTS and

CDMA BTS shared common transmission. The transmission of a swap BTS passed through

CDMA BTS first, and then the timeslot integration equipment extract the transmission. However,

because the synchronization timeslots were not provided, the clock of the GSM BTS could not

synchronize the upper level clock. As a result, the BTS could not work normally after swap.

III. Case 3: Inadequate Capacity of Reused Battery Delayed BTS Installation Progess

In a swap project, the power supply equipment of the original network was reused in the new

network. In addition, the capacity of the BTS was also expanded in the new network. After

installation, however, engineers found that the power supply equipment provided by the customer

could not meet requirement. And it cost some time for engineers to buy new power supply

equipment. Therefore, the BTS installation progress was greatly delayed.



IV. Case 4: BTS Integration Date Was Delayed Because of the Transmission Connector Used in the Original Network Mismatched That Used by Huawei

In a swap project, engineers found that the transmission connector used in the original network

mismatched that used by Huawei. Therefore, on-site engineers must remake the E1 line, but no

SMB connector was available then. In this case, the BTS integration date was delayed.

V. Case 5: BTS Installation Schedule Was Delayed Due to Goods Distribution Problem

According to plans of swap project, the project installation should be performed immediately after

customs clearance, but the distance between sites was large, so the transportation period was long.

Therefore, the goods could not be distributed to each site in time. As a result, multiple BTSs were

integrated twice, which delayed the network swap progress. Meeting this kind of problem, the

customer made many complaints. If you meet similar situation later, you should make proper

arrangement in advance.

VI. Case 6: CIC Mistake Caused by Confusion of Transmission Labels

Engineers found that there were many CIC mistakes present at the A-interface after BSC

installation. Through analysis, engineers found that the transmission labels were totally in a mess.

Therefore, when installing cable, you should pay attention to both the quality and correctness of

the project installation.

VII. Case 7: Engineering Quality Resulted in Customer Complaints

The customer complained that the coverage area of the network became smaller after a BTS was

swapped. Through careful analysis, engineers found that the problem was related to the 1/2

jumper locating between the set top and lightening protector. As far as this swap was concerned,

most of the antennas used in the old network were used in the new network. However, the

standing wave of the 1/2 jumper was not tested. Therefore, if you meet similar problem in the

future, you need to test the standing wave ratio of the 1/2 jumper. If necessary, you can design a

work flow to ensure the operation.

VIII. Case 8: M2000 Was Not Installed in Time

In a swap project, the installation conditions for M2000 installation were not met, so it was very

hard for engineers to monitor the BTS performance and locate problems. In this case, you should

communicate with the customer on how to create mature conditions for M2000 installation.

IX. Case 9: BTS Integration Date Was Delayed Because of the Connector of the Jumper to Be Used Was Different from the One Provided by Huawei

In a swap project, the connector of the jumper to be used was different from the one provided by

Huawei, so it cannot be connected to the lightening protector of Huawei. Therefore, on-site

engineers must remake the connector, but no auxiliary equipment was available then, so the

integration date was delayed. If you meet similar situations in the future, you need to confirm if

the connector is available before in advance.



9.3 Network Planning and Optimization Risk

9.3.1 Risk Related to Network Indicators

It is a common problem that the network indicators may become worse after BTS swap.

[Risk description]

The network quality may become worse after the swap of the local network from the perspective

of the following four aspects:

The network quality is really poor.

The customer thinks that the network quality is poor.

The customer thinks that the network should be optimized when faced with the pressure

from the indicator requirement.

Other equipment problems make the network quality worse.

[Solution]

Before swapping the network, you should collect the necessary data and test the network in

advance together with the customer. In addition, you should perform comparison test after swap.

Furthermore, you should optimize the network if necessary.

To make the comparison more effective, you can obtain the important indicators of original

network from the customer one month before the swap.

If the antennas of the original network need to be reused, you should test the standing wave ratio

of the antennas before swap. In addition, you should also pay attention to the operation of other

related equipment, such as MSC.

Meanwhile, you should guide the customer to believe in the equipment provided by Huawei and

pursued the customer to accept that the problem can be solved through network optimization.

9.3.2 Coverage Risk

It is the greatest risk that may happen during network swap.

[Risk description]

The coverage area of the network may become smaller after network swap, especially the

coverage area of the BTSs in suburban areas, countryside, and roads may become much smaller.

[Solution]

You must record the set-top power of the original BTS and configure the Huawei BTS

accordingly. If the set-top power of the Huawei BTS is lower than that of the original BTS, you

can apply two EDUs, two CDUs, and 60WTRX to the downlink, and apply tower mounted

amplifier to the uplink.

If receiving customer complaints, you can compare the set-top power before and after network

swap, and then locate the problem.



9.3.3 Inadequate Test before Swap

The network integration acceptance test may be affected if the test is inadequate before swap.

To avoid the risk, you should fully understand the coverage and performance of the original

network and design applicable network swap plan according to basic data.

9.3.4 Frequency Planning Risk

If the frequency planning is irrational or the frequencies are inadequate in the original network,

you should adopt new methods to plan the frequencies in the new network; otherwise the

frequency planning will turn out to be a difficult task. In this case, you should communicate with

the customer if new frequencies are to be added to the new network. If new frequencies are not

required, you should lower the customer’s expectation towards the network quality during the

network swap. Note that the parameters of the original network should be used for the swap.

Meanwhile, TRX capacity can be expanded and new sites can be established along with the

network swap. On the completion of the swap, you can plan the frequencies for the overall

network.

9.3.5 Risk Related to Traffic Volume

The traffic volume may become lower after swap, and the reasons are as follows:

The BTS set-top power becomes lower.

The antenna performance becomes worse.

Parameters are irrationally set.

The subscriber number changes.

The methods measuring the traffic volume vary with operators.

9.3.6 Case Study

I. Case 1: BSC Traffic Volume Decreased Sharply After the Swap of Operator A’s BSS System

The reason of this problem was that operator A and Huawei used different methods to measure

BSC traffic volume. In fact, the traffic volume measured at MSC was higher after swap.

II. Case 2: Problems Caused by Imcomplete Parameter Collection

[Risk Description]

The coverage area became smaller after operator N’s large-configuration BTS was replaced by

Huawei equipment in an urban area. In addition, the signals fluctuated greatly after swap.

[Reason Analysis]

The information the original equipment, such as BTS configuration, combiner mode, and antenna

number, were incompletely colleted before swap. After swap, the customer complained that the

combiner loss of Huawei equipment was greater than that of the original equipment, but the set-



top power of Huawei equipment was lower than that of the original equipment. Based on

negotiation with the customer, engineers strengthen the coverage through adding antennas and

PBU to the network and changing the BTS type.

[Reflection]

All the parameters of the original network must be colleted before network swap.

III. Case 3: Frequency Interference Was Generated Because of the Coverage Area of a BTS Was Enlarged After Swap.

The reason was that engineers failed to have an overall understanding of the original network.

Huawei 80W BTS was used to replace the operator N’s 40W BTS, but the frequencies of the

original network was still used in the new network, so frequency interference was generated.

IV. Case 4: Paging Success Rate Was Low Because of the Configuration Parameters of the Original Network Were Imcompletely Collected

The one-time paging success rate became lower after network swap. Through careful test and

analysis, engineers found that the operator N’s BTS did not control RACH minimum access level

but supported paging retransmission, so the one-time paging success rate was low.

Therefore, the information of the original network should be fully understood and analyzed. To

solve the previous problem, engineers can set the RACH minimum access level to 0-1.

V. Case 5: Problem Related to CRO Setting

The network ran normally after integration, but the customer complained that it was difficult to

make calls suddenly. Through careful analysis, engineers found that the CRO was set to 0. To

solve the problem, engineers integrated the BTS to another BSC and set the CRO to the default

value.

VI. Case 6: Call Drop Rate Became Higher After Swap

The call drop rate was doubled after network swap in an area. Test found that the original

equipment provider used different standard to measure call drop rate.

9.4 BSS Integration and Monitoring Risk

9.4.1 Risk Relate to BSS Integration Solution

[Risk description]

A swap project was characterized by short duration, large service volume, and complex

networking, so engineers found it hard to write down the integration solution, which may cause

potential risk.

[Solution]

The integration solutions must be written down.

All aspects concerned should considered into the integration solutions.



The integration solutions should be detailed enough.

The integration solutions should be reviewed.

Customers are required to participate into the solution design.

The solutions should be prepared in advance.

9.4.2 Risk Related to BTS Pre-integration

[Risk description]

If the pre-integration is not performed, potential risk may occur, because Huawei equipment and

the MSC of the original network cannot necessarily cooperate with each other well.

[Solution]

Both network pre-integration and network integration are key points for network swap, so the

network pre-integration cannot be omitted. If the network pre-integration is perfectly done,

customers will be more confident in Huawei’s engineering capability.

9.4.3 Risk Related to Transmission Commissioning

The transmission commissioning is one of the keys to the success of network integration.

[Risk description]

In some cases, the transmission commissioning workload is heavy at the integration night. The

integration progress will be affected if the transmission commissioning speed is low.

[Solution]

Hereunder lists the technical-based solutions:

Test the trunk with E1 card to ensure that the trunks are correctly connected. If necessary,

you can confirm the transmission and CIC for each line and paste label on each line.

Block half of the trunks before integration and unlock them after integration.

Paste labels on the trunks needing intermediate connection.

Simulate and practice pre-integration.

Connect the lines with transmission to avoid signaling congestion.

Arrange a specialist to check the previous operations.

Hereunder lists the non-technical solutions:

Notify related affairs to the customer in advance

Plan the integration progress according to customer’s transmission adjustment capability.

Apply for more time for transmission commissioning and integration from the customer.

Participate into each responsibility matrix actively.

9.4.4 Risk Related to BTS Integration

[Risk description]

BTS integration is a complex task, and any improper operation will result in integration failure.



[Solution]

Hereunder lists the solutions:

Integrate the BTSs by batch and fully consider the BTS location and adjacent cell

relationship.

Discuss the integration solutions with related parties fully and organize the exports for the

HQ of Huawei to review the solutions.

Set up a coordination team.

Make sure each BTS is debugged before integration.

Find the responsible person for each component and arrange a specialist to check if all the

components are available.

Check all the tables needed for the integration, such as BTS project parameter table, BTS

antenna jumper description table, integration time table, etc.

Set up emergency team.

Make related data and simulate the integration.

Create a channel through which engineers can communicate with the customer freely.

Strengthen the project management capability.

Paste labels on the jumpers of the original BTS.

Analyze BSS KPIs and core network KPIs during integration.

Test the dialing test function.

Organize experts from the HQ of Huawei to support the integration and ensure free

communication between experts and on-site engineers.

Optimize and adjust network parameters to ensure network quality.

The parameters of the original network and that of the new network should be consistent

with each other.

9.4.5 Emergency Problems Related to BSC Integration

[Risk description]

Generally, BSC integration should be finished in advance. If emergency problems occur at the

integration night, the whole BSC integration will fail.

[Solution]

You can test the BSC in detail beforehand. If emergency problem occur, you can seek help from

technical support engineers to locate the problem as soon as possible. For further analysis, BSC

supervisor should monitor and save the data such as interface messages and BTS log. If the

problem cannot be solved in time, you should change the data back to recover normal

communication. For details, see BSC Emergency Guide.



9.4.6 Handling of Abnormal Conditions during BTS Integration

I. BTS One-time Integration

The BTSs under the control of the same BSC can be integrated into the new network in one time.

To achieve this goal, engineers should design rigid plans. The VIP sites covering indoor

environment and remote areas should be integrated during day time, and the sites covering urban

areas should be integrated at about 00:00.

II. Antenna Problem Happened During BTS Swap

Generally, the antenna system of the original network can be reused, so you should test the

standing wave ratio of the old antennas to see if there is any problem. If the old antennas cannot

be reused, you should handle the problem immediately. If the antennas are inversely connected,

you need to correct the connection in time. If the standing wave ratio of the antennas is great, you

can consider remake the connector or change the feeder.

III. Repeater Reutilization Problem

If a repeater is attached to the BTS to be swapped, the repeater can be reused after swap. If the

frequency of this BTS needs not to be changed, you do not have to adjust the repeater either. If the

frequency of the BTS changes, you should modify the frequency parameters of the repeater.

IV. Indoor Distribution System Problem

Generally, the indoor distribution system can be reused. After the replacing the original BTS,

Huawei BTS is responsible for providing the signals for the indoor distribution system. Note that

the related transmission and antenna connectors are available.

V. VSWR Alarm Handling

The standby connectors must be available at the swap night. In addition, you should notify the

movable team to use instrument to test if the VSWR alarm is true.

VI. Inverse Connection of Antenna

You should install project following the project parameters and design strictly and use MS to test

if the cell direction is correct. If finding that the antenna is inversely connected, you should take

measures to solve this problem immediately.

VII. Abis Interface Error

Both the BTS operation and Abis interface should be tested after integration. The BTS installation

personnel should confirm the CGI through the local maintenance console or check if the CGI is

correct through test MS.

9.4.7 Case Study

I. Case 1: Monitoring Traffic Statistics After Integration Prevented Problems from Spreading

[Problem]



On the next day after network swap, engineers found that there was traffic volume in a cell, but no

call was present.

[Reason analysis]

Through checking channels, engineers found that the SDCCHs were in idle state. After changing

TRX, engineers found that the cell worked normally. Therefore, you should closely monitor the

important traffic statistics of the site after swap the next after swap to prevent the potential

problems from spreading.

II. Case 2: The Speed for the MS to Access the Network Was Slow Due to Clock Problem

Engineers found that the speed for the MS to access the network was slow in a site. First

engineers thought that the problem was present at the BSC. Through further analysis, engineers

found that UMG and Msoft3000 were located in different places, but the network was organized

according to IP. Therefore, the UMG could not obtain precise clock from IP transmission, which

resulted in BSC problem. As a result, the speed for the MS to access the network was slow.

9.5 Acceptance Risks

9.5.1 Risk Related to Customer Communication

[Risk description]

The acceptance items were not specified in the contract in detail. Because the engineers did not

communicate with the customer fully in advance, the acceptance speed was slow, so the date for

the equipment to access the network was delayed.

[Solution]

If the acceptance items were clarified in the contract, engineers should perform the acceptance

following the contract strictly. If some acceptance items were not specified in the contract,

engineers should communicate with the customer and obtain the customer’s written confirmation.

9.5.2 Risk Related to Acceptance Test before Integration

[Risk description]

The customer will perform acceptance test before integration. According to past experience,

engineers download the related acceptance manuals from http://support.huawei.com for the

customer, and the customer performs the test with the help of the manuals. However, the manual

update rate is relatively slow. Therefore, if the customer performs the acceptance test following

the manuals strictly, many test items will be unqualified.

[Solution]

Engineers should read the acceptance manuals beforehand and make corresponding correction. In

addition, engineers should accompany the customer with the acceptance test. If any problem is


http://support.huawei.com/


found engineers should feed it back to the related personnel and correct the acceptance manuals

accordingly.

9.5.3 Case Study

I. Case 1: Acceptance Test Could Not be Performed Because the Acceptance Standards Were Not Designed in Detail

The acceptance standards were not detailed in the contract, so the customer always created

difficulties for the engineers during the test.

In fact, there were a number of similar cases. To solve the problem, engineers should detail the

acceptance standards in the contract and communicate with the customer as early as possible.

II. Acceptance Progress Was Slow Because the Distance between BTSs Was Large

In an area, the distance between BTSs was large, so it cost test engineers’ lot of time on road. In

this case, the acceptance progress was affected.

To solve the problem, engineer should perform the acceptance test at the network optimization

stage with the company of the customer.

9.6 Non-technical Risk Analysis

9.6.1 Risk Related to Contract Items

At present, many contracts are not made scientifically. For example, the contract configuration is

incorrect, the KPI commitment is irrational, the engineering duration is too short, the acceptance

items are vague, and the service price was low.

To control the contract effectively, pre-sales department should participate into the contract

review. At the pre-sales stage, you should fully communicate with the marketing staff and

organize all the personnel concerned to review and clarify the contract.

After the contract is signed, you should evaluate the contract and find out solutions to potential

problems.

Some customers may require changing the contract. In this case, you cannot agree with or refuse

the customer directly. Instead, you should consult the related marketing personnel first.

9.6.2 Risk Related to Project Duration Risk

[Risk description]

Generally, the project duration is short, which may generate potential problem.

[Solution]

Prepare the related resources in advance.

Make a detailed plan

Spend some of your spare time on the work if necessary.



Implement task parallel.

Seek help from others

9.6.3 Management Risk

[Risk description]

Generally, a swap project involves multiple roles, including PM, Huawei BSC engineers, RNP

engineers, partners, RNO partners, customers, technical support experts, representative offices,

project supervisor, and other equipment providers. Therefore, how to manage these roles

effectively is problem.

[Solution]

Hereunder lists four solutions.

1) Cooperation between network planning and projectHuawei should adapt its networking planning solutions to the local network. The network

adjustment suggestions provided by the RNO teams should be put into practice after confirmed by

both the customer’s RNO owner and Huawei RNO owner. If you need the customer’s cooperation

or modify parameters in MSC, you should prepare corresponding application document. If the

customer or BSS engineers are responsible for the adjustment, you should require them to feed

back the adjustment results. RNO engineers are not allowed to change the BTS configuration by

their own, and RNP engineers are not allowed to change the RNO parameters by their own.

Therefore, the responsibility matrix of the RNO team and RNP team should be clearly defined.

The project team should notify the problem handling progress to the RNO team.

2) Subcontractor Management

Have an understanding of each subcontractor’s engineering capability before beginning the

network. Generally, you should know the experiences, knowledge, team number, vehicles,

and basic instrument owned by the subcontractor.

Set up project report and monitoring system.

Pay more attention to manage teams whose engineering capability is relatively poor.

Keep a good relationship with the engineering team.

Convey responsibility to each person in the contract.

Set up a unified database and report template if multiple subcontractors are responsible for

the project.

3) Customer cooperationFull communication with the customer must be implemented. If necessary, you should prepare

written document for customer cooperation.

4) Supervisor management



Supervisor connects the customer to Huawei, so you should fully communicate with the

supervisor. In some cases, the supervisor can help you manage the engineering team. Therefore,

supervisor management should be properly and strictly implemented.

9.6.4 Risk Related to Communication

[Risk description]

If the communication is not smooth and the responsibility matrix is not divided clearly,

unnecessary conflicts will occur and project duration may be prolonged.

[Solution]

The project manager plays a very important role in the project, so a project manager should have

both network planning skill and communication skill. The communication system should be

perfectly established. For example, weekly report and daily report should be submitted to the

customer’s manager.

Within the project team, daily report and weekly report system should be implemented. In

addition, the members of the project team should fix a period of time to communicate with

each other in a week. The daily report includes project progress, difficulty, and support

needed. The weekly report also includes the project progress in terms of a week, difficulty,

support needed, next week’s plan, etc.

Communicate with the related leaders of the representative office on the project. If there is

emergent problem, you should communicate with the leaders immediately.

Communicate with the customer through meetings, weekly report, and summary report. The

customer is expected to know the progress, difficulty, and future plans related to the project.

Note that the engineers responsible for customer communication should be fixed and the

communication with the customer’s senior management team should be emphasized.

Feed back the field conditions to Huawei according to working flows. If necessary, you can

organize the related departments and engineers to have meetings to solve serious problems

together.

9.6.5 Risk Related to Contract Implementation

[Risk description]

According to some contracts, the antennas, transmission, and power supply should be swapped

together with the equipment, but the customer may require that the equipment should be installed

at the position where the original cabinet located. In this case, it will be difficult for block

integration, which will prolong the integration time and affect network indicators; especially the

handover will be seriously affected. Sometimes MSC A-interface will not be expanded, so BTS

integration always carries A-interface integration. If the BSC is frequently adjusted, the stability

and quality of the network will be affected.

[Solution]



You are suggested to communicate with the customer on the detailed integration solution to win

the customer’s agreement. In addition, you ensure that the manpower, project supervisor, and

engineering team are available in advance. You are not suggested to assign multiple BTSs for a

project team.

9.6.6 Risk Related to Work Flow

[Risk description]

If the project team do not follow the swap procedures made by Huawei but follow their own

manner to implement the project, great potential problems may be generated.

[Solution]

Engineers should be familiar with the work flow and follow the flow strictly.

New comers should learn from experienced engineers.

Self-reflection is encouraged.

Feed back the customer’s extra requirement to the related party and any self-reply is

forbidden.

9.6.7 Case Study

I. Case 1: Customer’s Senior Management Team Sent Complaints to Huawei Marketing Department Because Engineers Did Not Report the Problem Handling Result in Time

[Problem description]

Customers’ senior management departments complained about echo problem to bidding

department directly.

[Reason Analysis]

Engineers from cooperation partners were in charge of the echo problems, but they did not notify

the processing progress to customers, so customers thought that the project was not paid enough

attention to. Considering the seriousness of the complaint, representative offices established a

special group to solve the problem. After four weeks’ effort, engineers found that circuit from the

local exchange to the site A had been adjusted recently and there were two E1 Loop backs. That is

why the echo problem occurred. In addition, Huawei engineers reported the processing progress

to customer’ senior management departments every week. After the problem was solved, Huawei

engineers submitted a formal report to customers. After that, customer’s doubt towards Huawei

gradually changes.

[Reflection]

Problems should be solved in time and real-time communication with customers should be

emphasized.



II. Case 2: Customer Complained About the Document Problem

In a swap project, engineers failed to consider customer’s cooperation needs. The document

submitted to the customer was modified for several times, which was greatly to the unsatisfactory

of the customer.

III. Case 3: Important Cooperation Affairs Should be Confirmed by the Customer’s Senior Management Team at the Project Coordination Meeting

The customer’s engineers promised Huawei that they could perform secondary shipment by their

own, but the vice president refused it, which delay the duration and increased cost.

The project coordination meeting is rather important to Huawei, so you should invite the

customer’s senior manager to participate into the meeting. The cooperation affairs should be

submitted to representative offices for review.

IV. Case 4: Shortage of Project Duration Made the Swap Plan in a Mess.

The customer required a swap to be finished in a shorter time than planned, which made the swap

plan in a mess. As a result, the network quality was greatly affected and customers always

complained about network problems. To solve the problems, Huawei explained the reasons to

customers and guides them to accept the planned swap strategies. Results proved that the planned

strategies were applicable.

V. Case 5: Hastened Progress Caused Secondary Integration

In a swap project, multiple BTSs could not connect to the planned BSC directly due to various

reasons, such as hastened progress, limit of transmission progress, and low speed of BSC

establishment. As a result, the network structure was in a mess. Therefore, the secondary

integration was a must. As for the second handover, however, it both added up to the workload

and brought quality risk to the network.



Appendix: Reference Document Catalog and Network

Integration Checklist

9.7 Reference Document Catalog

All the reference documents are provided in http://support.huawei.com/. You can download the

one you need from the website.

9.8 Network Integration Checklist

9.8.1 BSC Service Test

Note that if the test results are abnormal, you need fill in the remark in the following table.

No. Test Item Sub-item Conclusion Evaluation Standard Remark

1 Basic service Location update

when the MS is

powered on or

powered off.

Normal

Abnormal

1) Location update succeeds and MS can

access network successfully.

2) The complete location update procedure

can be seen through the window

monitoring Um interface, Abis

interface, and A-interface.

2 Call service Both calling party

and called party are

MSs.

Normal

Abnormal

Call is successfully made and there is no

one-way audio, cross talking, and echo.

3 Call service Call made between

MS and fixed phone

Normal

Abnormal



4 Call service Extended cell call test Normal

Abnormal



5 Short

message

service

MS sends and

receives short

message

Normal

Abnormal

Short message can be sent, received, and

displayed correctly.

6 Handover

service

Intra-cell handover Normal

Abnormal

1) Intra-cell handover is successfully made

2) There is record for successful intra-cell

handover according to traffic statistics.


http://support.huawei.com/


7 Handover

service

Overlay-to-underlay

handover

Normal

Abnormal

1) IUO handover is successfully made.

2) There is record for successful IUO

handover according to traffic statistics.

8 Handover

service

Inter-cell handover

within BSC

Normal

Abnormal

1) Inter-cell handover within BSC is

successfully made.

2) There is record for successful inter-cell

handover within BSC according to

traffic statistics.

9 Handover

service

Inter-BSC handover Normal

Abnormal

1) Inter-BSC handover is successfully

made.

2) There is record for successful inter-

BSC handover according to traffic

statistics.

10 Basic service Dual band network Normal

Abnormal

1) MS can perform location update in the

dual band network.

2) MS can work as either calling party or

called party normally.

3) The handover between dual band is

normal.

9.8.2 GPRS Dialing Test Checklist


1 Basic service If the MS attach

function is normal.

Normal

Abnormal

Check if the service is normal through

spot test and drive test.

2 Basic service If the MS PDP

activation function

is normal.

Normal

Abnormal



3 Basic service If the MS cell

update is normal.

Normal

Abnormal


spot test and drive test. Note that the

tests should be performed during and

after cell update.

4 Basic service If the MS routing

area update is

normal.

Normal

Abnormal


spot test and drive test. Note that the

tests should be performed during and

after cell update.




5 Basic service If the MS can enjoy

services normally,

such as www

service.

Normal

Abnormal



6 Basic service If the MS service

rate is normal.

Normal

Abnormal

Record and analyze the MS service rate

through PING and FTP service.

9.8.3 A-interface Dialing Test Checklist

PCM Module

No.

FTC

Board

NO.

BSC

DDF

Port No.

Transmis

sion DDF

Port No.

Starting

CIC

Terminat

ing CIC

Test Results Problem

Timeslot

Problem

CIC

1

2

3

4

5

6

7

8

9

10

Note:

For each blank, if the test result is normal, mark the blank with √; and if the test result is abnormal, mark the blank with ×, and write down the abnormal timeslot and CIC number.

9.8.4 Abis Interface Dialing Test Checklist

BSC Name: Owner: Test Time:

Abis Interface Dialing Test Checklist

Modul

e No.BIE

Group

BIE

Port

BSC-

DDF

Trans

missio

BTS

NameConfi

gurati

Norm

al

Board

StateChann

el

Succe

ss

Chann

el



No. No.Port

No.

n

DDF

Port

No.

onInitiali

zationState

Locati

on

Updat

e

Dialin

g Test

9.8.5 BTS Radio Channel Dialing Test Checklist



Site No. Site Name Site Type Site

Configurati

on

Test Result Problem TRX

No.

Problem

Timeslot No.

Remark

Note:

The site number, site name, site type (such as BTS30), and configuration type (S3/3/3) must be recorded if they

are tested. Each TRX and each timeslot of a site must be tested. If the test result is normal, mark the blank with

√; and if the test result is abnormal, mark the blank with ×, and write down the abnormal timeslot and CIC

number.


Documents

G-GSM BSS Swap Guide-20060430-A-1.0.doc