WiMAX BTS Network Impact Report

WiMAX BTSV300R003C01

Network Impact Report (Compared with V300R002C03)

Issue Draft A

Date 2011-07-15

HUAWEI TECHNOLOGIES CO., LTD.

Copyright © Huawei Technologies Co., Ltd. 2011. All rights reserved.No part of this document may be reproduced or transmitted in any form or by any means without prior written consent of Huawei Technologies Co., Ltd.

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Issue Draft A (2011-07-15) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co.,

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WiMAX BTS V300R003C01Network Impact Report (Compared with V300R002C03) About This Document

About This Document

PurposeThis document describes the impacts of the functions added or enhanced in V300R003C01 on V300R002C03. It is useful for you prepare for future network upgrades.

This document is only for reference.

Intended AudienceThis document is intended for:

Network planning engineers System engineers Network operators

Change HistoryChanges between document issues are cumulative. The latest document issue contains all the changes in earlier issues.

Issue Draft A (2011-07-15)This is the draft A release.


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WiMAX BTS V300R003C01Network Impact Report (Compared with V300R002C03) Contents

Contents

About This Document........................................................................ii1 Overview.......................................................................................1

1.1 Capacity and Performance.................................................................................................................................11.1.1 System Capacity.......................................................................................................................................11.1.2 Network Performance...............................................................................................................................2

1.2 Hardware............................................................................................................................................................21.3 Implementation..................................................................................................................................................31.4 License...............................................................................................................................................................41.5 Interfaces............................................................................................................................................................4

1.5.1 Inter-NE Interfaces...................................................................................................................................41.5.2 Man-Machine Interfaces...........................................................................................................................5

1.6 Operation and Maintenance...............................................................................................................................71.7 Other NEs..........................................................................................................................................................91.8 Other Features..................................................................................................................................................10

2 Summary of Function Impacts......................................................113 Impacts of V300R003C01 Functions on V300R002C03....................13

3.1 Enhanced Multi-Carrier Load Balancing.........................................................................................................133.1.1 Description..............................................................................................................................................133.1.2 Capacity and Performance......................................................................................................................133.1.3 Hardware................................................................................................................................................143.1.4 Inter-NE Interfaces.................................................................................................................................143.1.5 Operation and Maintenance....................................................................................................................143.1.6 Other NEs...............................................................................................................................................153.1.7 Other Features.........................................................................................................................................15

3.2 UL EFFR..........................................................................................................................................................153.2.1 Description..............................................................................................................................................153.2.2 Capacity and Performance......................................................................................................................163.2.3 Hardware................................................................................................................................................163.2.4 Inter-NE Interfaces.................................................................................................................................163.2.5 Operation and Maintenance....................................................................................................................173.2.6 Other NEs...............................................................................................................................................22


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3.2.7 Other Features.........................................................................................................................................223.3 DL EFFR..........................................................................................................................................................22

3.3.1 Description..............................................................................................................................................223.3.2 Capacity and Performance......................................................................................................................233.3.3 Hardware................................................................................................................................................233.3.4 Inter-NE Interfaces.................................................................................................................................233.3.5 Operation and Maintenance....................................................................................................................243.3.6 Other NEs...............................................................................................................................................253.3.7 Other Features.........................................................................................................................................25

3.4 UL SDMA........................................................................................................................................................253.4.1 Description..............................................................................................................................................253.4.2 Capacity and Performance......................................................................................................................263.4.3 Hardware................................................................................................................................................263.4.4 Inter-NE Interfaces.................................................................................................................................263.4.5 Operation and Maintenance....................................................................................................................273.4.6 Other NEs...............................................................................................................................................273.4.7 Other Features.........................................................................................................................................28

3.5 Interference Countermeasures.........................................................................................................................283.5.1 Description..............................................................................................................................................283.5.2 Capacity and Performance......................................................................................................................283.5.3 Hardware................................................................................................................................................283.5.4 Inter-NE Interfaces.................................................................................................................................283.5.5 Operation and Maintenance....................................................................................................................283.5.6 Other NEs...............................................................................................................................................293.5.7 Other Features.........................................................................................................................................29

3.6 DL Power Control............................................................................................................................................303.6.1 Description..............................................................................................................................................303.6.2 Capacity and Performance......................................................................................................................303.6.3 Hardware................................................................................................................................................303.6.4 Inter-NE Interfaces.................................................................................................................................303.6.5 Operation and Maintenance....................................................................................................................303.6.6 Other NEs...............................................................................................................................................313.6.7 Other Features.........................................................................................................................................31

3.7 MCS Level Selection Optimized When IRC Is Enabled.................................................................................313.7.1 Description..............................................................................................................................................313.7.2 Capacity and Performance......................................................................................................................323.7.3 Hardware................................................................................................................................................323.7.4 Inter-NE Interfaces.................................................................................................................................323.7.5 Operation and Maintenance....................................................................................................................323.7.6 Other NEs...............................................................................................................................................333.7.7 Other Features.........................................................................................................................................33

3.8 UL SBC-REQ Coverage Optimized................................................................................................................33


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3.8.1 Description..............................................................................................................................................333.8.2 Capacity and Performance......................................................................................................................333.8.3 Hardware................................................................................................................................................333.8.4 Inter-NE Interfaces.................................................................................................................................333.8.5 Operation and Maintenance....................................................................................................................343.8.6 Other NEs...............................................................................................................................................343.8.7 Other Features.........................................................................................................................................34

3.9 Air Interface Synchronization Clock System...................................................................................................353.9.1 Description..............................................................................................................................................353.9.2 Capacity and Performance......................................................................................................................353.9.3 Hardware................................................................................................................................................353.9.4 Inter-NE Interfaces.................................................................................................................................353.9.5 Operation and Maintenance....................................................................................................................353.9.6 Other NEs...............................................................................................................................................363.9.7 Other Features.........................................................................................................................................36

3.10 HARQ Category 5 and Category 6................................................................................................................363.10.1 Description............................................................................................................................................363.10.2 Capacity and Performance....................................................................................................................363.10.3 Hardware..............................................................................................................................................363.10.4 Inter-NE Interfaces...............................................................................................................................363.10.5 Operation and Maintenance..................................................................................................................363.10.6 Other NEs.............................................................................................................................................373.10.7 Other Features.......................................................................................................................................37

3.11 Beamforming.................................................................................................................................................373.11.1 Description............................................................................................................................................373.11.2 Capacity and Performance....................................................................................................................373.11.3 Hardware...............................................................................................................................................373.11.4 Inter-NE Interfaces...............................................................................................................................373.11.5 Operation and Maintenance..................................................................................................................373.11.6 Other NEs.............................................................................................................................................463.11.7 Other Features.......................................................................................................................................46

3.12 UL 64QAM....................................................................................................................................................463.12.1 Description............................................................................................................................................463.12.2 Capacity and Performance....................................................................................................................473.12.3 Hardware..............................................................................................................................................473.12.4 Inter-NE Interfaces...............................................................................................................................473.12.5 Operation and Maintenance..................................................................................................................473.12.6 Other NEs.............................................................................................................................................483.12.7 Other Features.......................................................................................................................................48

3.13 Enhanced Assignment....................................................................................................................................493.13.1 Description............................................................................................................................................493.13.2 Capacity and Performance....................................................................................................................49


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3.13.3 Hardware..............................................................................................................................................493.13.4 Inter-NE Interfaces...............................................................................................................................493.13.5 Operation and Maintenance..................................................................................................................493.13.6 Other NEs.............................................................................................................................................503.13.7 Other Features.......................................................................................................................................50

3.14 Inter-User QoS...............................................................................................................................................513.14.1 Description............................................................................................................................................513.14.2 Capacity and Performance....................................................................................................................513.14.3 Hardware..............................................................................................................................................513.14.4 Inter-NE Interfaces...............................................................................................................................513.14.5 Operation and Maintenance..................................................................................................................513.14.6 Other NEs.............................................................................................................................................563.14.7 Other Features.......................................................................................................................................56

3.15 Power Saving Scheduling..............................................................................................................................563.15.1 Description............................................................................................................................................563.15.2 Capacity and Performance....................................................................................................................573.15.3 Hardware..............................................................................................................................................573.15.4 Inter-NE Interfaces...............................................................................................................................573.15.5 Operation and Maintenance..................................................................................................................573.15.6 Other NEs.............................................................................................................................................573.15.7 Other Features.......................................................................................................................................57

3.16 R6 Interoperability Based on the NWG R1.2 or NWG R1.3........................................................................573.16.1 Description............................................................................................................................................573.16.2 Capacity and Performance....................................................................................................................583.16.3 Hardware..............................................................................................................................................583.16.4 Inter-NE Interfaces...............................................................................................................................583.16.5 Operation and Maintenance..................................................................................................................583.16.6 Other NEs.............................................................................................................................................593.16.7 Other Features.......................................................................................................................................59

A Terms..........................................................................................61B Acronyms and Abbreviations..........................................................................62


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WiMAX BTS V300R003C01Network Impact Report (Compared with V300R002C03) 3 Overview

1 Overview

1.1 Capacity and Performance1.1.1 System CapacityDBS3900

A maximum of three baseband boards can be installed in a DBS3900, and each baseband board supports a maximum of three sector carriers.

Compared with V300R002C03, V300C003C01 has a better the performance of the BWA baseband processing and radio interface unit ver. b (BBBIb) and BBBI.

Each BBBIb or BBBI serves a maximum of 200 active mobile stations (MSs) for each sector carrier in partial usage of subchannels (PUSC) with all subchannels mode when the bandwidth is 10 MHz. 70% of the active MSs are configured with one pair of best effort (BE) service flows and the remaining 30% with one pair of BE service flows and one pair of extended real-time polling service (ertPS) flows.

The long-term evolution baseband processing unit version c (LBBPc) has been added in DBS3900 WiMAX V300R003C01. Each LBBPc serves a maximum of 256 active MSs for each sector carrier in PUSC with all subchannels mode when the bandwidth is 10 MHz. 70% of the active MSs are configured with one pair of BE service flows, and the remaining 30% with one pair of BE service flows and one pair of ertPS service flows.

Compared with V300R002C03, V300R003C01 has a higher peak throughput. The downlink (DL) peak throughput of one sector carrier reaches 31.41 Mbit/s with multiple-input multiple-output (MIMO) Matrix B enabled, and the uplink (UL) peak throughput of one sector carrier reaches 9 Mbit/s with UL collaborative spatial multiplexing (CSM) or space division multiple access (SDMA) enabled− The DL-to-UL subframe ratio is 29:18 in PUSC with all subchannels mode. − The bandwidth is 10 MHz.

BTS3702C BTS3702C WiMAX V300R003C01 provides the same system capacity as BTS3702C

WiMAX V300R002C00. A maximum of two sector carriers can be configured.


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Each BTS3702C serves a maximum of 256 active MSs, and supports a maximum of 300 pairs of service flows when only one sector carrier is configured in PUSC with all subchannels mode and the bandwidth is 10 MHz.

Each BTS3702C serves a maximum of 150 active MSs, and supports a maximum of 150 pairs of service flows for each sector carrier when two sector carriers are configured in PUSC with all subchannels mode and the bandwidth is 10 MHz.

The DL peak throughput of one sector carrier reaches 31.41 Mbit/s with MIMO Matrix B enabled, and the UL peak throughput of one sector carrier reaches 9 Mbit/s with UL CSM enabled− The DL-to-UL subframe ratio is 29:18 in PUSC with all subchannels mode. − The bandwidth is 10 MHz.

BTS3701B The BTS3701B supports only one sector carrier. Each BTS3701B serves a maximum of 100 active MSs and supports a maximum of 100

pairs of service flows in PUSC with all subchannels mode when the bandwidth is 10 MHz.

The DL peak throughput of one sector carrier reaches 31.41 Mbit/s with MIMO Matrix B enabled, and the UL peak throughput of one sector carrier reaches 9 Mbit/s with UL CSM or SDMA enabled− The DL-to-UL subframe ratio is 29:18 in PUSC with all subchannels mode. − The bandwidth is 10 MHz.

1.1.2 Network PerformanceNetwork performance is optimized as follows:

The use of DL enhanced fractional frequency reuse (EFFR), UL EFFR, and DL power control balances interference across sectors, and increases sector throughput in intra-frequency mode.

Beamforming is introduced to increase DL throughput. Loads and BE satisfaction are better balanced among carriers in multi-carrier mode. UL SDMA improves base station (BS) spectral efficiency. Interference detection and countermeasures are provided. The SBC-REQ message handling process is optimized to expand UL network coverage. UL 64QAM is introduced to increase UL throughput.

1.2 HardwareASN-GW

Huawei WASN9770 V300R003C02 is recommended. It can run on the NE40E and Packet Gateway Platform (PGP).

BSThe hardware in DBS3900 WiMAX V300R003C01 is optimized as follows:


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DBS3900 WiMAX V300R003C01 uses a new power board whose output power reaches 360 W.

A new fan with a higher rotation speed is used, and the BBU heat dissipation reaches 650 W.

The main control boards and baseband boards can be upgraded to support Long Term Evolution (LTE) time division duplex (TDD) systems without replacing any of the hardware.

Each RRU3232 supports three carriers in 4T4R mode, and the output power over each antenna port is 20 W. The software can be upgraded to support a WiMAX- LTE TDD dual-mode system or an LTE TDD system. WiMAX is short for Worldwide Interoperability for Microwave Access.

The following power cabinets can be used:− Indoor power cabinet TP48300/A − Enhanced outdoor power cabinet APM30

M2000There is no impact on the M2000.

1.3 ImplementationTable 1-1 lists the network element (NE) upgrade paths.

Table 1-1 NE upgrade paths

NE Upgrade Path

DBS3900 The following versions can be directly upgraded to V300R003C01: V300R002C03 V300R003C00The following versions must be upgraded to V300R002C03 or V300R003C00 and then to V300R003C01: V300R002C01 V300R002C02

BTS3702C BTS3702C WiMAX V300R002C00 can be directly upgraded to V300R003C01.

BTS3701B BTS3701B WiMAX V300R003C01 is the first official release, and therefore no upgrade is required.

M2000 The following M2000 versions must be upgraded to V200R011C01: V200R009C00 V200R010C00

After an upgrade, the M2000 can manage BSs in the versions earlier than V300R003C01.


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BSs in V300R003C01 and an earlier version can be connected to the same access service network gateway (ASN-GW) and M2000.

The M2000, ASN-GW, and BS must be upgraded in sequence.

1.4 LicenseTable 1-1 lists new license control items in V300R003C01.

Table 1-1 New license control items in V300R003C01

License Control Item Description

Beamforming software Controls the beamforming function.

UL enhancement software Controls the UL 64QAM function.

RET antennas software Controls the RET antenna function.

RRU3232 power Required only when RRU3232 transmit power exceeds 40 W. Each license allows a 20 W increase of RRU3232 transmit power.

Operation and maintenance data interface package

Controls interference detection.

Functions under license control can be enabled only after the dedicated license control item is purchased. Table 1-2 describes the license control items for functions in V300R003C01.

Table 1-2 License control items for functions in V300R003C01

Function License Control Item

UL SDMA UL enhancement software package

Air interface synchronization clock system

Enhanced synchronization software package

1.5 Interfaces1.5.1 Inter-NE Interfaces

In V300R002C03, the R6 interface complies with the NWG R1.0 or R1.2. In V300R003C01, the R6 interface complies with the NWG R1.0, R1.2, or R1.3.

The R1 interface between the BS and the subscriber station (SS) or mobile station (MS) is specified in the IEEE 802.16e-2005 Cor2D3 and DRAFT-T23-004-R010v02-B_SRD standard. Some features over the air interface require the support of the MS. For details, see chapter 3 "Impacts of V300R003C01 Functions on V300R002C03."


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Table 1-1 describes the functions that have impacts on R1 and R6 interfaces.

Table 1-1 Functions that have impacts on R1 and R6 interfaces

Interface

NE Protocol Functions

R6 interface

BS and ASN-GW

NWG R1.2 and NWG R1.3

R6 interoperability based on the NWG R1.2 or NWG R1.3

R1 BS -SS/MS IEEE 802.16e- Enhanced multi-carrier load balancing

UL EFFR UL SDMA Interference countermeasures DL power control HARQ category 5 and category 6 UL 64QAM Enhanced assignment

1.5.2 Man-Machine InterfacesTable 1-1 describes the changes to the man-machine interfaces in V300R003C01 when compared with V300R002C03.

Table 1-1 Impacts of functions on BS man-machine interfaces

Item Impact

Man-machine language (MML) commands

MML commands are optimized to meet Huawei SingleRAN requirements. This facilitates the future evolution from a single-mode BS into a multi-mode base station.

MML commands and parameter settings are optimized based on feature types.

MML commands used in internal tests are removed, and the command execution window is more user-friendly.

The number of carrier-level parameters is reduced. The managed object LGCPORT in the transmission configuration is

replaced with RSCGRP. The SBT parameter is added to the following managed objects:

− EthTrunkLink− OMCh− CFMMEP− MPGroup− E1T1LoopPara− BFDSession− EthOAM3AH


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Item Impact

− PingFilter− EthTrunk− PPPLink− MPLink− DevIP− EthPort− IPRoute

Some MML commands are added or modified to support new functions.

Alarms Alarms are optimized to meet Huawei SingleRAN requirements, facilitating the future evolution from a single-mode base station into a multi-mode base station.

Alarm correlation is optimized by removing redundant and invalid alarms.

Alarms related to bidirectional forwarding detection (BFD) and dual-mode systems are used.

Engineering state alarms are supported.

Performance measurement

The function subset Feature Performance Test is added. Performance counters are added to support new functions. The location parameter SubboardType is added to function subsets

EthPort, E1T1, PPP, and MPGRP. The function subset LGCPORT is replaced with RSCGRP. The following location parameters are added to RSCGRP:

− BearType− SubboardType− PhyPortType− PhyPortNo− RscGrp− RscGrpNo

Invalid measurement items are removed.

Web LMT The graphical user interface (GUI) is optimized. Engineering quality self-check is added. Alarms and events are displayed separately in the alarm window.

WCS Wizard-based site deployment, clone-based site deployment, and capacity expansion are supported.

Batch adjustment and cold parameter modification notification are added.

Regular configuration checks are added. WiMAX configuration system (WCS) deployment and capacity

expansion wizards are updated.

NHC The following check items are added:


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Item Impact

R6 link status check Key indicators related to remote electrical tilt (RET) antennas Air interface clock synchronization between the BTS3701B and

neighboring cells Unidirectional configurations of neighboring cellsNetwork health check reports can be compared.

Logs Customized call history record (CHR) is added.

1.6 Operation and MaintenanceTable 1-1 describes new operation and maintenance functions in V300R003C01.

Table 1-1 New operation and maintenance functions in V300R003C01

Function Description

Customized CHR Customized CHR helps you resolve subscriber complaints and analyze MS faults. Upon receiving subscriber complaints, you can collect customized CHR logs, and analyze subscriber call information according to the structure field documentation provided by Huawei.

MS information query optimized

The following parameters are added to the DSP ALLMSINFO command: ULPER NI DLDATARATE ULDATARATE You can run this command to query MS signal quality in real time.

Trial license A trial license enables you to use a function for free for a trial period, and helps you decide whether to purchase the function. A trial license does not affect other functions for which licenses have been purchased. The default trial period is three months.


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WCS In V300R003C01, you can preset the time for a golden check. The system automatically checks benchmark parameters as scheduled.

Template-based and clone-based site deployment wizards are added.

Neighboring cell parameters and radio parameters can be modified in batches on the WCS.

A notification message is displayed when you attempt to modify a cold parameter. After a cold parameter is modified, you must block carriers to make for modification to take effect.

A site capacity expansion wizard is added to facilitate capacity expansion.

Access to BS configuration data is controlled. After the M2000 is upgraded, existing permissions to access BS configuration data are revoked by default.

Soft-commissioning tasks and DHCP data are automatically created when site deployment configuration scripts are generated.

The M2000 provides a northbound interface for BTS configuration data, which is required for site deployment.

Tracing items configurable on the CIT or UIT window

In V300R003C01, you can view parameters in real time in the CIT or UIT window.

Jitter information collection and graphical display

You can collect network latency and jitter information based on the IEEE P1588 protocol and view collected information in real time on the GUI. Only the BTS3702C and BTS3701B support this function.

Alarm correlation This function decreases the number of alarms that are reported. It also enables you to identify the root causes of alarms, which facilitates alarm clearance.

Control over LMT-based manual alarm clearance

You can run an MML command to disable LMT-based manual alarm clearance. This prevents site engineers from manually clearing these alarms.

UL interference stimulation

To simulate UL interference caused when a large number of MSs enter neighboring cells, you can generate interference noises on the BS UL channel by running an MML command. This function is used to test and assess network performance when interference occurs on the UL.

Engineering quality self-check

The Web LMT provides the engineering quality self-check as a routine health check item. This self-check consists of subitems related to engineering quality, including global positioning system (GPS) satellite locking, antenna standing-wave ratio (SWR), and optical port power. The check results indicate whether a BS passes the check and also contain check criteria and related MML command execution results. This facilitates fault analysis and location.


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Enhanced software upgrade

You can upgrade BS software and install cold and hot patches simultaneously on the M2000.

BS software packages are compressed more efficiently. As a result, downloaded and activated more quickly.

BS BootROM software can be upgraded automatically during a BS upgrade.

Version rollback can be performed if necessary after a hot patch is installed.

In addition to CPU hot patches, secondary core hot patches and DSP hot patches can be installed on a BS.

RRU3701s do not support hot patches.

Network management system (NMS) sharing in a WiMAX-LTE system

DBS3900 WiMAX V300R003C01 shares the same BBU with the LTE TDD system. You can use the following M2000 functions to manage and maintain a WiMAX-LTE system: Alarm management: Alarms are reported if configurations

conflict. The M2000 manages common alarms. Device panel: The device panel displays all multi-mode base

station (MBTS) devices. Topology management: The M2000 can display whether the BS

and eNodeB are bound. Binding relationship check: The M2000 can check whether the BS

and eNodeB are bound. Base station binding: The M2000 automatically binds the BS and

eNodeB if the check results indicate that they are not bound. Version matching check: The M2000 checks whether the BS

version and the eNodeB version match before an upgrade is performed. The upgrade is performed only when the versions match.

1.7 Other NEsTable 1-1 lists the impacts of V300R003C01 on other V300R002C03 NEs. For details, see chapter 3 "Impacts of V300R003C01 Functions on V300R002C03."

Table 1-1 Impacts of new functions on NEs in V300R003C00

Function SS/MS DBS3900

BTS3702C

BTS3701B

GW

Enhanced multi-carrier load balancing

Yes Yes Yes No No

UL EFFR Yes Yes Yes Yes No


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Function SS/MS DBS3900

BTS3702C

BTS3701B

GW

DL EFFR No Yes Yes Yes No

UL SDMA Yes Yes No Yes No

Interference Countermeasures

Yes Yes Yes Yes No

DL Power Control Yes Yes No No No

Modulation and coding scheme (MCS) level selection optimization when interference rejection combining (IRC) is enabled

No Yes No Yes No

UL SBC-REQ coverage optimization

Yes Yes Yes Yes No


No No No Yes No

HARQ category 5 and category 6

Yes Yes Yes Yes No

Beamforming No Yes No No No

UL 64QAM Yes Yes Yes Yes No

Enhanced assignment Yes Yes Yes Yes No

Inter-user QoS No Yes Yes Yes Yes

Power saving scheduling No Yes Yes Yes No

R6 interoperability based on the NWG R1.2 or R1.3

No Yes Yes Yes Yes

In the SS/MS and ASN-GW columns, No indicates that new function does not have impact on SSs, MSs, or ASN-GWs because they are not involved in new functions. In the DBS3900, BTS3702C, BTS3701B columns, No indicates that new function does not have impact on DBS3900s, BTS3702Cs, BTS3701Bs because they do not support new functions.

1.8 Other FeaturesFor details, see chapter 3 "Impacts of V300R003C01 Functions on V300R002C03."


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WiMAX BTS V300R003C01Network Impact Report (Compared with V300R002C03) 3 Summary of Function Impacts

2 Summary of Function Impacts

This chapter describes the impacts of new and enhanced functions, and provides the mapping between the functions and the features in the feature list.

Table 2-1 lists the impacts of functions on the system.

Table 2-1 Impacts of functions on the system

Feature ID Feature Name Function Basic or Optional

New or Enhanced

Impact

WBFD-008005001

Load Balancing Enhanced multi-carrier load balancing

Basic Enhanced Minor

WBFD-012005001

UL EFFR Networking

UL EFFR Basic Enhanced Major

WBFD-101001001

DL PUSC+PUSC with All SC FFR Networking

DL EFFR Basic Enhanced Minor

WBFD-150004001

UL SDMA UL SDMA Basic New Minor

WBFD-016020001

Network TDD Interference Detection

Interference countermeasures

Basic New Minor

WBFD-012007001

DL Power Control DL power control Basic New Minor

WBFD-002012001

Two-Antenna UL Diversity Receiving

MCS level selection optimized when IRC is enabled

Basic Enhanced Major

WBFD-019001001

Four-Antenna UL Diversity Receiving

WBFD-010001001

AMC


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WiMAX BTS V300R003C01Network Impact Report (Compared with V300R002C03) 3 Summary of Function Impacts

Feature ID Feature Name Function Basic or Optional

New or Enhanced

Impact

WBFD-006004001

Access Enhancement in RNG and SBC

UL SBC-REQ coverage optimized


WBFD-170002001

Air Interface Synchronization Clock System



WBFD-011001001

CC-HARQ HARQ category 5 and category 6


WBFD-140001001

Beamforming Beamforming optimized


WBFD-150002001

UL 64QAM UL 64QAM Optional New Minor

WBFD-008005001

Load Balancing Enhanced assignment Basic Enhanced Minor

WBFD-007009001

Inter-User QoS Inter-user QoS Basic Enhanced Minor

WBFD-010009001

Power Saving Scheduling

Power saving scheduling

Basic New Minor

NA NA R6 interoperability based on the NWG R1.2 or NWG R1.3

Basic New Major

In Table 2-1, the impacts are classified as Minor and Major. A function has major impacts on the system when it meets the following requirements:

It is supported by all MSs or ASN-GWs in the network. It requires hardware replacement. The processing procedure is fundamentally changed.

Other impacts are classified as Minor.

For details, see chapter 3 "Impacts of V300R003C01 Functions on V300R002C03."


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WiMAX BTS V300R003C01Network Impact Report (Compared with V300R002C03) 3 Impacts of V300R003C01 Functions on V300R002C03

3 Impacts of V300R003C01 Functions on V300R002C03

3.1 Enhanced Multi-Carrier Load Balancing3.1.1 Description

Multi-carrier load balancing is supported in versions earlier than V300R003C01. In V300R003C01, due to the differences of network coverage between carriers, this function is optimized as follows:

Load balancing handovers from an outer carrier to an inner carrier are supported. The thresholds for starting and stopping this type of handover are lower than those for starting and stopping the original load balancing handovers. MSs are highly likely to enter the network over an outer carrier with optimal signal quality. If this happens, the outer carrier load is heavy. This function decreases the load on the outer carrier, and improves the network entry success rate.

The existing algorithms for load balancing handovers and BE satisfaction balancing handovers are optimized. Now, cell edge MSs can be handed over to neighboring sectors and central MSs to other carriers in the same sector. The algorithm optimization ensures that load balancing handovers are performed in a timely manner. It also improves the handover success rate and balances loads and BE satisfaction across carriers on a multi-carrier network.

3.1.2 Capacity and PerformanceSystem Capacity

Enhanced multi-carrier load balancing ensures that loads and BE satisfaction are balanced among carriers on a multi-carrier network, and BSs can serve more MSs and carry more service flows as a result as well.

Network PerformanceThe possibility of BS overloads decreases, and the network entry success rate increases.


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3.1.3 HardwareThe BTS3701B and RRU3701 do not support enhanced multi-carrier load balancing and BE satisfaction balancing, because they do not support multi-carrier configurations.

3.1.4 Inter-NE InterfacesThere is no impact on inter-NE interfaces.

3.1.5 Operation and MaintenanceData Configuration

Table 3-1 describes the modified MML commands.

Table 3-1 Modified MML commands

MML Command Description

ADD CARRIERBASICINFOMOD CARRIERBASICINFO

The MULTICARRIERIND parameter is added.

Configure carriers with high signal quality as outer carriers and carriers with low signal quality as inner carriers on a multi-carrier network.

MOD LOADCTRLPARA The following parameters are added: CENTRALUSERDLMPRTHESH LOADHORESVDLOADTHESH LOADHOSCANDELTATHESH OTILOADHOSTARTTHESH OTILOADHOSTOPTHESH

Performance CountersTable 3-1 describes the new performance counters related to enhanced multi-carrier load balancing.

Table 3-1 New performance counters related to enhanced multi-carrier load balancing

Performance Counter

Description

Number of Handovers Triggered by UL Load Balancing

Number of handovers triggered by uplink load balancing within a measurement period. This counter is used to evaluate how frequently balancing handovers are triggered by uplink load balancing.

Number of Handovers Triggered by DL Load Balancing

Number of handovers triggered by downlink load balancing within a measurement period. This counter is used to evaluate how frequently balancing handovers are triggered by downlink load balancing.


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Performance Counter

Description

Number of Balancing Handovers Triggered by UL BE Satisfaction

Number of balancing handovers triggered by uplink BE satisfaction within a measurement period. This counter is used to evaluate how frequently balancing handovers are triggered by uplink BE satisfaction.

Number of Balancing Handovers Triggered by DL BE Satisfaction

Number of balancing handovers triggered by downlink BE satisfaction within a measurement period. This counter is used to evaluate how frequently balancing handovers are triggered by downlink BE satisfaction.

Number of MSs for Handover Scanning Triggered by Load

Number of MSs that perform scanning after handovers are triggered by load within a measurement period. This counter is used to calculate the percentage of MSs that can be handed over after balancing handovers are triggered by load.

Number of MSs Scanned for Balancing Handover Triggered by BE Satisfaction

Number of MSs that perform scanning after the balancing handover is triggered by BE satisfaction within a measurement period. This counter is used to calculate the percentage of MSs that can be handed over after balancing handovers are triggered by BE satisfaction.

Number of Balancing Handover Requests

Number of balancing handover requests within a measurement period. This counter is used to calculate the percentage of MSs that can be handed over after balancing handovers are triggered by BE satisfaction or load.

Number of Handover Requests Triggered by UL Signal Quality

Number of balancing handover requests triggered by uplink signal quality within a measurement period. This counter is used to calculate the percentage of MSs that can be handed over after balancing handovers are triggered by uplink signal quality.

Fault ManagementThere is no impact on fault management.

3.1.6 Other NEsMSs that support BS-initiated handovers must be used.

3.1.7 Other FeaturesThere is no impact on other features.


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3.2 UL EFFR3.2.1 Description

UL EFFR is a fractional frequency reuse (FFR) technology used in the frequency domain. It ensures that the frequency reuse coefficient for the edge band is close to 3, and allows MSs at the central band to use all of the frequency resources. This expands network coverage and improves sector capacity.

In V300C003C00, UL EFFR without extended bands was introduced.

In V300R003C01, UL EFFR allows the use of the extended band.

In V300R003C01, the first zone in a UL subframe is a PUSC with all subchannels zone. It is divided into a UL common band and a UL extended band. The UL common band occupies the same sub-band as the edge band in the second zone, and the extended band occupies the same sub-band as the central band in the second zone. MSs can be scheduled for the extended band to improve UL spectral efficiency.

Figure 3-1Figure 3-1 shows UL EFFR that uses extended bands.

Figure 3-1 UL EFFR that uses extended bands


BS UL throughput increases.

Network PerformanceScheduling MSs for the extended band increases interference on UL common bands in neighboring sectors at the same frequency band, but does not affect ranging check, channel quality indication channel (CQICH) performance, and acknowledgment (ACK) channel performance.

3.2.3 HardwareThere is no impact on hardware.


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The following MML commands are added:

MOD ULEFFRPARA LST ULEFFRPARA

Performance CountersTable 3-1 describes the new performance counters related to UL EFFR.

Table 3-1 New performance counters related to UL EFFR

Performance Counter

Description

Number of Slots at Center Band

Total number of slots occupied by the center band.

Number of Slots at Border Band

Total number of slots occupied by the border band.

Number of Slots Allocated to Center User by Center Band

Number of slots allocated to the user by the center band, including wasted resources caused by lengthened bursts.

Number of Slots Allocated to Border User by Border Band

Number of slots allocated to the border user by the border band, including wasted resources caused by lengthened bursts.

Number of Slots Allocated to Center User by Border Band

Number of slots allocated to center user bursts by the border band, including wasted resources caused by lengthened bursts.

Rate of Occupied Slots at Center Band

Ratio of the number of slots allocated to the center band user to the total number of slots allocated by the BS to the center band.

Rate of Slots Occupied by Border User at Border Band

Ratio of the number of slots allocated to the border band user to the total number of slots allocated by the BS to the border band.

Rate of Slots Occupied by Center User at Border Band

Proportion of border band slots allocated to the center user to measure the actual allocation.

Average Number of Users at Center Band

Average number of users at the center band within a measurement period.

Average Number of Users at Border Band

Average number of users at the border band within a measurement period.


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Performance Counter

Description

Traffic of User at Center Band

Total data received by the user at the center band, including the traffic obtained from border band but not including padding and dropped bytes, within a measurement period.

Traffic of User at Border Band

Total data received by the user at the border band, not including padding and dropped bytes, within a measurement period.

Average Throughput at Center Band

Average throughput at the center band on a carrier within a measurement period.

Average Throughput at Border Band

Average throughput at the border band on a carrier within a measurement period.

Times of DL Measurement CINR Difference Between Reuse1 and Reuse3 Not Higher Than 5dB

CINR of Reuse1 and that of Reuse3 are compared on the BS. If the CINR difference between Resue1 and Reuse3 is small, it indicates that the interference signals received by the MS are weak. If there is a big difference, it indicates that the interference signals are strong. This measurement counter is used to count the times when the CINR difference is not higher than 5 dB.

Times of DL Measurement CINR Difference Between Reuse1 and Reuse3 Higher Than 5dB and Not Higher Than 6dB

CINR of Reuse1 and that of Reuse3 are compared on the BS. If the CINR difference between Resue1 and Reuse3 is small, it indicates that the interference signals received by the MS are weak. If there is a big difference, it indicates that the interference signals are strong. This measurement counter is used to count the times when the CINR difference is above 5 dB but not higher than 6 dB.








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Performance Counter

Description

Times of DL Measurement CINR Difference Between Reuse1 and Reuse3 Higher Than 9dB

CINR of Reuse1 and that of Reuse3 are compared on the BS. If the CINR difference between Resue1 and Reuse3 is small, it indicates that the interference signals received by the MS are weak. If there is a big difference, it indicates that the interference signals are strong. This measurement counter is used to count the times when the CINR difference is higher than 9 dB.

Times of Path Loss Not Lower Than 130dB

Times of path loss not lower than 130 dB within a measurement period.

Times of Path Loss Lower Than 130dB and Not Lower Than 120dB

Times of path loss lower than 130 dB but not lower than 120 dB within a measurement period.


Times of path loss lower than 120 dB and but lower than 110 dB within a measurement period.


Times of path loss lower than 110 dB but not lower than 100 dB within a measurement period.







Times of Path Loss Lower Than 70dB

Times of path loss lower than 70 dB within a measurement period.

Number of Occupied Slots at Extended Band on the Uplink

Number of slots used in the uplink extension band within a measurement period. This counter is used to evaluate the possibility of enabling the uplink extension band and resource usage in the uplink extension band.

Number of Extended Band Slots on the Uplink

Total number of slots used in the uplink extension band within a measurement period. This counter is used to evaluate the possibility of enabling the uplink extension band and resource usage in the uplink extension band.

Throughput of Extended Band on the Uplink

Throughput in the uplink extension band within a measurement period. This counter is used to calculate the average throughput in the extension band.


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Performance Counter

Description

Total Number of Packets Received by Extended Band on the Uplink

Total number of packets received in the uplink extension band within a measurement period. This counter is used to calculate the error packet rate in the extension band.

Number of Error Packets Received by Extended Band on the Uplink

Total number of error packets received in the uplink extension band within a measurement period. This counter is used to calculate the error packet rate in the extension band.

Number of Successful MS Handovers from Edge Band to Center Band on the Uplink

Number of successful MS handovers from uplink edge band to uplink center band within a measurement period. This counter is used to evaluate how frequently the MS handovers from edge band to center band and calculate the success rate of the handover.

Number of Failures in MS Handovers from Edge Band to Center Band on the Uplink

Number of unsuccessful MS handovers from uplink edge band to uplink center band within a measurement period. This counter is used to evaluate how frequently the MS handovers from edge band to center band and calculate the success rate of the handover.

Number of Successful MS Handovers from Center Band to Edge Band on the Uplink

Number of successful MS handovers from uplink center band to uplink edge band within a measurement period. This counter is used to evaluate how frequently the MS handovers from center band to edge band and calculate the success rate of the handover.

Number of Failures in MS Handovers from Center Band to Edge Band on the Uplink

Number of unsuccessful MS handovers from uplink center band to uplink edge band within a measurement period. This counter is used to evaluate how frequently the MS handovers from center band to edge band and calculate the success rate of the handover.

NI of Extended Band Average noise index (NI) in the extension band within a measurement period. This counter is used to evaluate the average interference level in the extension band.

NI of Center Band Average NI in the center band within a measurement period. This counter is used to evaluate the average interference level in the center band.

NI of Edge Band Average NI in the edge band within a measurement period. This counter is used to evaluate the average interference level and channel quality in the edge band.

NI-Based Interference Density (Edge Band)

Interference density based on the NI in the edge band within a measurement period. This counter is used to calculate the ratio of interference duration to the measurement period.

NI-Based Interference Intensity (Edge Band)

Average value of edge band NI that exceeds the threshold (119 dBm) within a measurement period. This counter is used to evaluate the average interference level in the edge band.


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Performance Counter

Description

NI of Common Region Average NI in the uplink common zone within a measurement period. This counter is used to evaluate the average interference level in the uplink common zone and channel quality in the common zone.

NI-Based Interference Density (Common Region)

Interference density based on the NI in the common zone within a measurement period. This counter is used to calculate the ratio of interference duration to the measurement period.

NI-Based Interference Intensity (Common Region)

Average value in the common zone NI that exceeds the threshold (119 dBm) within a measurement period. This counter is used to evaluate the interference level in the common zone.

Average Load of the UL Center Band

Average load in the uplink center band within a measurement period. This counter is used to evaluate the congestion level in the uplink center band.

Number of SDMA Decisions for MSs on the Border

Total number of decisions on whether to enable SDMA for cell edge MSs within a measurement period. This counter is used to calculate the total number of SDMA decisions due to the changes in the modulation and coding scheme (MCS) for cell edge MSs that support SDMA.

Number of Times SDMA Is Enabled for MSs on the Border

Number of times SDMA is enabled for cell edge MSs within a measurement period. This counter is used to calculate the number of times that the uplink carrier-to-interference-and-noise ratio (CINR) of cell edge MSs reaches the SDMA NI threshold.

Number of Slots Used for SDMA Partnership at the Edge Band

Number of slots available for SDMA multiplexing for MSs in the edge band within a measurement period. This counter is used to calculate the total number of slots that can be used for SDMA multiplexing for MSs in the edge band.

Number of Slots Successfully Paired for SDMA-enabled Center Users at the Edge Band

Number of slots used for SDMA multiplexing for center MSs in the edge band within a measurement period. This counter is used to calculate the number of slots successfully used for SDMA multiplexing for center MSs in the edge band.

Number of Slots Successfully Paired for SDMA-enabled Edge Users at the Edge Band

Number of slots used for SDMA multiplexing for cell edge MSs in the edge band within a measurement period. This counter is used to calculate the number of slots successfully used for SDMA multiplexing for cell edge MSs in the edge band.

Number of Bytes Used for SDMA Partnership at the Edge Band

Number of bytes available for SDMA multiplexing for MSs in the edge band within a measurement period. This counter is used to calculate the total number of bytes that can be used for SDMA multiplexing for MSs in the edge band.


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Performance Counter

Description

Number of Bytes Successfully Paired for SDMA-enabled Center Users at the Edge Band

Number of bytes used for SDMA multiplexing for center MSs in the edge band within a measurement period. This counter is used to calculate the number of bytes transmitted in slots successfully used for SDMA multiplexing for center MSs in the edge band.

Number of Bytes Successfully Paired for SDMA-enabled Edge Users at the Edge Band

Number of bytes used for SDMA multiplexing for cell edge MSs in the edge band within a measurement period. This counter indicates the number of bytes transmitted in slots successfully used for SDMA multiplexing for cell edge MSs in the edge band.


3.2.6 Other NEsThe MS must support the division of a UL subframe into two zones. If the first UL zone is a PUSC with all subchannels zone, the MS must automatically identify and skip the common band, or the MS allows the BS to specify the start of the extended band using OFDMA symbol offset and Subchannel offset in the UL Allocation Start IE or HARQ UL-MAP IE.

3.2.7 Other FeaturesUL EFFR and UL CSM cannot be in the active state simultaneously, but UL EFFR and UL SDMA can.

3.3 DL EFFR3.3.1 Description

DL EFFR is a key technology in intra-frequency networking mode. When DL EFFR is enabled, sector coverage is close to that in PUSC with 1/3 subchannels mode, and time-frequency resources are effectively used. This improves spectral efficiency.

Similar to DL FFR, DL EFFR divides a subframe into a PUSC with partial subchannels zone and a PUSC with all subchannels zone. The PUSC with partial subchannels zone can be a PUSC with 1/2 subchannels zone or a PUSC with 1/3 subchannels zone. The PUSC with all subchannels zone has a fixed boundary, and all sectors are aligned along the boundary. This reduces interference between the edge areas of neighboring sectors.

In the PUSC with partial subchannels zone, subchannel power is high. Subchannels in PUSC with partial subchannels zones in neighboring sectors do not overlap. This type of zone serves cell edge MSs on the UL common channel.

In the PUSC with all subchannels zone, subchannel power is low. This type of zone serves cell center MSs. Figure 3-1 shows the subframe structure.


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Figure 3-1 Subframe structure

In V300R003C01, MSs are scheduled between zones to maximize modulation order product code rates (MPRs) and improve BS spectral efficiency. MS scheduling between zones can be triggered based on BE satisfaction to improve average BE satisfaction in a BS.

When DL EFFR is enabled, MS switches between beamforming mode and MIMO B+beamforming mode are optimized.


DL EFFR increases BS DL throughput.

Network PerformanceDL EFFR improves BE subscriber experience.




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MOD DLEFFRPARA LST DLEFFRPARA

The following MML commands are removed:

MOD FFRPARA LST FFRPARA

The meaning and value range of the DLZONEIND parameter are modified in the following MML commands:

MOD CARRIERZONEINFO LST CARRIERZONEINFO

Performance CountersTable 3-1 describes the new performance counters related to DL EFFR.

Table 3-1 New performance counters related to DL EFFR

Performance Counter

Description

Number of Times MSs Exit the Network Due to Air Link Failures in the DL PUSC All Zone

Number of times MSs exit the network due to air link failures in the downlink PUSC All zone within a measurement period. This counter is used to analyze the network exit due to air link failures in multiple downlink zones.

Downlink PUSC Partial Zone Mean Load

Average load in the downlink PUSC Partial zone on a carrier within a measurement period. This counter is used to calculate the load in the downlink PUSC Partial zone on a carrier.

Downlink PUSC All Zone Mean Load

Average load in the downlink PUSC All zone on a carrier within a measurement period. This counter is used to calculate the load in the downlink PUSC All zone on a carrier.

Number of Satisfactory BE Service Flows at the DL Partial Zone

Number of satisfactory BE service flows in the downlink PUSC Partial zone within a measurement period. This counter is used to evaluate the BE satisfaction level in the downlink PUSC Partial zone.

Total Number of BE Service Flows at the DL Partial Zone

Total number of BE service flows in the downlink PUSC Partial zone within a measurement period. This counter is used to evaluate the BE satisfaction level in the downlink PUSC Partial zone.

BE Satisfaction at the DL Partial Zone

Satisfaction level of BE service flows in the downlink PUSC Partial zone within a measurement period. This counter is used to evaluate user experience of services in the downlink PUSC Partial zone.


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Performance Counter

Description

Number of Satisfactory BE Service Flows at the DL All Zone

Number of satisfactory BE service flows in the downlink PUSC All zone within a measurement period. This counter is used to evaluate BE satisfaction level in the downlink PUSC All zone.

Total Number of BE Service Flows at the DL All Zone

Total number of BE service flows in the downlink PUSC All zone within a measurement period. This counter is used to evaluate BE satisfaction level in the downlink PUSC All zone.

BE Satisfaction at the DL All Zone

Satisfaction level of BE service flows in the downlink PUSC All zone within a measurement period. This counter is used to evaluate user experience of services in the downlink PUSC All zone.


3.3.6 Other NEsThere is no impact on other NEs.


3.4 UL SDMA3.4.1 Description

When UL SDMA is enabled, the spatial multiplexing technology allows multiple MSs to use the same UL time-frequency resources. This increases UL throughput over the air interface.

The BS allows single-transmit-antenna MSs to use SDMA in the UL PUSC zone. The BS selects the MSs based on the measurement results on the physical layer (PHY) and the information reported by the MSs.

SDMA gain is obtained by multiplexing UL time-frequency resources, as shown in Figure 3-1.


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Figure 3-1 UL SDMA gain principle

BS

MS3

MS2MS1

MS1 resource MS2 resource

MS3 resource

Layer 1 schedule

Layer 2 schedule

MS1 & MS2 pi l ot MS3 pi l ot Nul l

MS1 data MS2 data MS3 data

As shown in Figure 3-1, Layer 1 and Layer 2 belong to the same time-frequency resource set, the amount of resources occupied by MS 1 and MS 2 are equal to that of resources occupied by MS 3. The pilot structure of MS 1 and MS 2 does not overlap with that of MS 3, and the BS demodulates data sent from two MSs based on the pilot structure. This increases UL throughput.


UL SDMA increases BS average UL throughput and cell edge MS throughput.

Network PerformanceThere is no impact on network performance.




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The following parameters are added to the MOD MIMOPARA and LST MIMOPARA commands:

ULVIRTUALMIMOMODE SDMAENTHDOFFSET SDMADISTHDOFFSET

Performance CountersTable 3-1 describes the new performance counters related to UL SDMA.

Table 3-1 New performance counters related to UL SDMA

Performance Counter Description

Number of Decisions on Whether to Enable UL SDMA

Number of decisions on whether to enable uplink SDMA within a measurement period. This counter is used to calculate the possibility of enabling SDMA.

Number of Times UL SDMA Is Enabled

Number of times uplink SDMA is enabled within a measurement period. This counter is used to calculate the possibility of enabling SDMA.

Number of Slots Used for Partnership Between UL SDMA MSs

Number of slots available for uplink SDMA multiplexing within a measurement period. This counter is used to calculate the MS matching success rate.

Number of Bytes Used for Partnership Between UL SDMA MSs

Number of bytes available for uplink SDMA multiplexing within a measurement period. This counter is used to calculate the MS matching efficiency.

Number of Slots Used for Successful Partnership Between UL SDMA MSs

Number of slots used for uplink SDMA multiplexing within a measurement period. This counter is used to calculate the MS matching success rate.

Number of Bytes Used for Successful Partnership Between UL SDMA MSs

Number of bytes used for uplink SDMA multiplexing within a measurement period. This counter is used to calculate the MS matching efficiency.


3.4.6 Other NEsMSs that support CSM negotiation and HARQ must be used.


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3.4.7 Other Features MSs do not support interference rejection combining (IRC) demodulation when using

UL SDMA to enter the network. UL SDMA is incompatible with UL repetition coding. UL SDMA is incompatible with UL 64QAM 5/6 in the DBS3900. UL SDMA is incompatible with UL 64QAM 3/4 and 64QAM 5/6 in the BTS3701B.

3.5 Interference Countermeasures3.5.1 Description

TDD interference occurs between two distant BSs when the latency exceeds the transmit transition gap (TTG).

To prevent TDD interference, Interference countermeasures are introduced and BSs perform the following operations:

1. Measures the NI of the UL common band to detect interference 2. Reports an alarm if interference is detected3. Scans the preamble to locate interference sources4. Reserves the last symbols of the DL frame to cancel interference between BSs, or

configures a safety zone in the front of the UL common band to prevent interference


There is no impact on system capacity.

Network PerformanceInterference countermeasures decrease the call drop rate.

3.5.3 Hardware8HP BBIs do not support DL symbol reservation.

BTS3701Bs do not support preamble scanning.




MOD ANTIINTERFERE


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STR PREAMBLESCAN STP PREAMBLESCAN DSP PREAMBLESCAN

Performance CountersTable 3-1 describes the new performance counters related to interference countermeasures.

Table 3-1 New performance counters related to interference countermeasures

Performance Counter

Description

NI of Uplink Safety Zone Average NI in the first three symbols in the uplink safety zone within a measurement period. This counter is used to evaluate the average interference level and channel quality in the safety zone.

Number of Times the First Three UL Symbols Are Interfered With

Number of times there is interference in the first three symbols in the uplink safety zone within a measurement period. This counter is used to evaluate interference level in the first three symbols and indicate whether the safety zone must be configured.

Number of Times Interference in the First Three UL Symbols Is Cleared

Number of times there is no interference in the first three symbols in the uplink safety zone within a measurement period. This counter is used to evaluate interference level in the first three symbols and indicate whether the safety zone must be canceled.

Fault Management The BS reports an interference alarm upon detecting that the difference between the

common band NI and the data region NI exceeds the value of the ULNIDETECTTH parameter or that the absolute value of the common band NI is higher than the specified threshold.

The BS clears the interference alarm upon detecting that the difference between the safety zone NI and the data region NI is smaller than the value of the ULNIDETECTTH parameter.

3.5.6 Other NEsThe MS must allow adding of a safety zone before the common band.

3.5.7 Other Features Preamble scanning has higher priority than any other functions such as reverse spectral

scanning. Therefore, other commands are terminated when they conflict with the STR PREAMBLESCAN command.

Interference on the UL common band increases if UL EFFR is enabled and safety zones are configured. Therefore, enable IRC to maintain UL EFFR performance.


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3.6 DL Power Control3.6.1 Description

When DL power control is enabled, a lower-level MCS is used and the DL transmit power of some MSs is decreased to reduce intra-frequency interference between BSs without affecting the MS quality of service (QoS) performance.

To maintain sector throughput, MCS levels can be reduced only when the DL load is light.


DL power control helps increase the number of online MSs if loads are unbalanced on the network.

Network PerformanceIntra-frequency interference decreases between sectors.

3.6.3 HardwareOnly the DBS3900 using the 4HP BWA baseband processing and radio interface unit (BBBI) supports DL power control.



The DLPCMODESWITCH parameter is added to the following MML commands:

MOD PCAMCPARA LST PCAMCPARA

The DLPCMODESWITCH parameter is set to OFF by default.

Performance CountersTable 3-1 describes the new performance counters related to DL power control.


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Table 3-1 New performance counters related to DL power control

Performance Counter

Description

Average Number of MSs Under DL Power Control

Average number of MSs in the downlink power control within a measurement period. This counter is used to evaluate how frequently the downlink power control takes effect.

Average Power Decrease Under DL Power Control

Average decreased amount of MS power in the downlink power control within a measurement period. This counter is used to evaluate the impact of the downlink power control on co-channel interference decrease.


3.6.6 Other NEsDL power control is applicable only to the MSs that support dedicated pilots.

3.6.7 Other FeaturesDL power control is not effective in the PUSC with partial subchannels zone.

3.7 MCS Level Selection Optimized When IRC Is Enabled3.7.1 Description

When IRC is enabled, the BS measures the post-processing carrier-to-interference-and-noise ratio (CINR) after the pre-processing CINR measurement. The pre-processing CINR is obtained at the baseband antenna port after linear combination, and the post-processing CINR is obtained after maximum ratio combining (MRC) or IRC self-adaptation.

In versions earlier than V300R003C01, only the pre-processing CINR is used to determine MCS levels. As a result, the CINR does not improve after IRC is enabled.

In V300R003C01, the BS dynamically determines the UL receiving mode based on pre-processing and post-processing CINRs on the MS. This maximizes UL link spectral efficiency.

This function defines three UL receiving modes:

Single-stream mode: CSM and SDMA are disabled, and the BS determines the MCS level based on the pre-processing CINR. This ensures link reliability and normal service running when the radio conditions are poor.

Single-stream enhanced mode: CSM and SDMA are disabled, and the BS determines the MCS level based on the post-processing CINR. Compared with single-stream mode, this mode improves spectral efficiency and link availability when there is interference.


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CSM-SDMA mode: CSM or SDMA is enabled, and space multiplexing is used. This mode uses the pre-processing CINR to determine the MCS level. Compared with single-stream mode, CSM-SDMA mode doubles spectral efficiency in optimal channel conditions.

The BS selects the optimal UL receiving mode that can maximize spectral efficiency.


This function helps increase UL throughput when interference is strong.

Network PerformanceThis function helps increase MS UL throughput when interference is strong.

3.7.3 HardwareThis function cannot be used on the BTS3702C, because it does not support IRC.



The following parameters are added to the MOD PCAMCPARA and LST PCAMCPARA commands:

ULESNGLMODESWITCH ULSNGLMODEPERTH ULPARTNERPROB

The ULESNGLMODESWITCH parameter is set to OFF by default.

Performance CountersTable 3-1 describes the new performance counters related to MCS level selection optimized when IRC is enabled.

Table 3-1 New performance counters related to MCS level selection optimized when IRC is enabled


Number of Slots Received by Using IRC at the Center Band on the Uplink

Total number of slots that the BS receives using IRC at the center band on the uplink within a measurement period. This counter is used to evaluate the IRC efficiency. The measured value is invalid if EFFR is not used on the uplink.


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Number of Slots Received by Using IRC on the Uplink

Number of slots the BS receives using IRC on the uplink. This counter is used to evaluate the IRC efficiency.




3.8 UL SBC-REQ Coverage Optimized3.8.1 Description

The SBC-REQ message used during MS network entry is large in size, and cannot be segmented. Three subchannels are used to transmit the SBC-REQ message, which increases the possibility of transmission failures. This decreases UL network coverage and reduces the network entry success rate.

In V300R003C01, a BS sends an MS the SBC-RSP message containing the minimum capability set attribute if it does not receive an SBC-REQ message from the MS. This helps expand BS coverage.



Network PerformanceThis function helps expand network coverage and improve the radio access success rate.




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There is no impact on data configuration.

Performance CountersTable 3-1 describes the new performance counters related to UL SBC-REQ coverage optimization.

Table 3-1 New performance counters related to UL SBC-REQ coverage optimization


Number of SBC-RSP Messages Sent by BS for the First Time

Number of times the BS actively sends the SBC-RSP messages when the BS does not receive the SBC-REQ from the MS within a measurement period. This counter is used to evaluate the effect of the uplink SBC-REQ optimization coverage solution.

Number of Times the BS Fails to Send SBC-RSP After the Maximum of Retransmissions

Number of times the BS does not receive the BR header from the MS requesting bandwidth for the primary connection identifier (CID) when the number of SBC-RSP message resending times reach the maximum value. This counter is used to evaluate the effect of the uplink SBC-REQ optimization coverage solution.

Number of BR MAC Headers from MSs for Requesting Bandwidth for SBC-REQ

Number of times the BS receives BR headers from the MS requesting bandwidth for the SBC-REQ message within a measurement period.


3.8.6 Other NEsThis function is subject to the BS minimum capability set and the MS capability on the PHY. If an MS does not support a function specified in the SBC-RSP message, the following conditions may occur:

The MS exits the network. The MS does not exit the network, but the function is performed abnormally.



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3.9 Air Interface Synchronization Clock System3.9.1 Description

This function is applicable to indoor coverage where Global Positioning System (GPS) clock synchronization usually fails due to weak indoor GPS signals. Preamble signals travel over a longer distance than broadcast signals and service signals do in a WiMAX BS. The air interface synchronization clock system enables a BS to demodulate preamble signals sent from neighboring BSs to obtain a synchronization clock source. Then, the BS synchronizes its time and frequency with those of a neighboring BS. This function achieves clock synchronization in indoor coverage at a low cost.


Throughput decreases by less than 3%, because several data frames are not used for data transmission periodically over the air interface when the BTS3701B is receiving preamble signals from the clock source.


3.9.3 HardwareOnly the BTS3701B supports this function.




ADD AIRITFSYNCCLK LST AIRITFSYNCCLK RMV AIRITFSYNCCLK

Performance CountersThere is no impact on performance counters.



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3.9.7 Other FeaturesWhen this function is enabled, a BS synchronizes only frequencies and radio frames with neighboring BSs. Therefore, fast ranging is not supported when this function is enabled.

3.10 HARQ Category 5 and Category 63.10.1 Description

In V300R003C01, HARQ category 5 and category 6 are introduced to increase single-subscriber peak throughput on the UL and DL.

Compared with HARQ category 4, HARQ category 5 increases the DL buffering size and the number of UL HARQ channels, and therefore UL and DL throughput improves. Compared with HARQ category 5, HARQ category 6 increases the UL buffering size and further improves UL peak throughput.



Network PerformanceThis function increases the single-subscriber peak rate.




The value range of the HARQCHASEBUFCAP parameter is modified in the MOD HARQPARA command to support HARQ category 5 and category 6.



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3.10.6 Other NEsMSs that support HARQ category 5 and category 6 must be used.

3.10.7 Other FeaturesHARQ category 5 and category 6 may fail to reach the theoretical single-subscriber peak rate when beamforming is enabled.

3.11 Beamforming3.11.1 Description

Beamforming is a smart antennas antenna technology. It allows a BS to weight DL data based on channel information, which improves the quality of signals that MSs receive.

The combination of beamforming and MIMO has the following benefits:

CINR and signal quality are improved due to antenna array gain. Network coverage is expanded due to antenna diversity gain. Spectral efficiency and the peak rate are improved on the BS.


Network throughput increases.

Network PerformanceMS DL signal quality is improved.

3.11.3 Hardware 8HP BBBIs do not support beamforming. RRUs support beamforming only in 4T4R mode.




MOD BFPARA


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LST BFPARA

Performance CountersTable 3-1 describes new performance counters related to beamforming.

Table 3-1 New performance counters related to beamforming

Performance Counter

Description

Number of Times Resources Are Scheduled for BF Users

Number of times resources are scheduled for all BF MSs in MIMO-B+DP-PW-AW, MIMO-A+DP-PW-AW, and DP-PW-AW modes on a sector carrier within a measurement period. This counter indicates how frequently the BS enables BF.

Number of Shifts Between BF Users and N-BF users

Number of times all MSs switch between BF and non-BF modes on a sector carrier within a measurement period.

Number of Switches Between the DP Mode and Non-DP Mode

Number of times all MSs switch between DP and non-DP modes on a sector carrier within a measurement period.

Number of Bytes Scheduled for MIMO-BF Users

Total number of bytes scheduled for all MIMO-BF users on a carrier within a measurement period. This counter is used to indicate the traffic volume of MIMO-BF users. The measurement result does not include the number of bytes used for HARQ retransmission.

Number of Slots Scheduled for MIMO-BF Users

Number of slots occupied by all MIMO-BF users on a carrier within a measurement period. This counter is used to indicate how time and frequency resources are occupied by MIMO-BF users. The measurement result includes the number of slots used by newly transmitted packets and for HARQ retransmission. If a user uses repetition coding, the measurement result also includes the number of slots occupied by this user for repetition coding.

Number of Bytes Scheduled for Matrix B+BF Users

Total number of bytes scheduled for all Matrix B+BF users on a carrier within a measurement period. This counter is used to indicate the traffic volume of Matrix B+BF users. The measurement result includes only the number of bytes used by newly transmitted packets.

Number of Slots Scheduled for Matrix B+BF Users

Number of slots occupied by all Matrix B+BF users on a carrier within a measurement period. This counter is used to indicate how time and frequency resources are occupied by Matrix B+BF users. The measurement result includes the number of slots used by newly transmitted data and for HARQ retransmission. If a user uses repetition coding, the measurement result also includes the number of slots occupied by this user for repetition coding.


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Performance Counter

Description

Average Number of Non-MIMO-B MSs in the Partial Zone with Dedicated Pilots

A+DP-AW, MIMO-A+DP-PW-AW, DP-PW-AW, and DP-AW modes within a measurement period.

Average Number of MIMO-B MSs in the Partial Zone with Dedicated Pilots

Average number of MIMO-B MSs (using dedicated pilots) in the PUSC Partial zone in MIMO B+DP-AW and MIMO B+DP-PW-AW modes within a measurement period.

Average Number of Non-MIMO-B MSs in the PUSC All Zone with Dedicated Pilots

Average number of MIMO-A and non-MIMO MSs (using dedicated pilots) in the PUSC All zone in MIMO-A+DP-AW, MIMO-A+DP-PW-AW, DP-PW-AW, and DP-AW modes within a measurement period.

Average Number of MIMO-B MSs in the PUSC All Zone with Dedicated Pilots

Average number of MIMO-B MSs (using dedicated pilots) in the PUSC All zone in MIMO B+DP-AW and MIMO B+DP-PW-AW modes.

Number of Slots Occupied by Non-MIMO-B Users in DL PUSC All Zone QPSK1/2Rep6 with Dedicated Pilots

Total number of slots occupied by MIMO-A and non-MIMO MSs (using dedicated pilots) in the PUSC All zone on the downlink when the MCS mode is QPSK1/2REP6. The number of slots occupied by management connections and traffic connections is counted, including the number of slots used for HARQ retransmission of subbursts.





Number of Slots Occupied by Non-MIMO-B Users in DL PUSC All Zone QPSK1/2 with Dedicated Pilots

Total number of slots occupied by MIMO-A and non-MIMO MSs (using dedicated pilots) in the PUSC All zone on the downlink when the MCS mode is QPSK1/2. The number of slots occupied by management connections and traffic connections is counted, including the number of slots used for HARQ retransmission of subbursts.


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Performance Counter

Description

Number of Slots Occupied by Non-MIMO-B Users in DL PUSC All Zone QPSK3/4 with Dedicated Pilots

Total number of slots occupied by MIMO-A and non-MIMO MSs (using dedicated pilots) in the PUSC All zone on the downlink when the MCS mode is QPSK3/4. The number of slots occupied by management connections and traffic connections is counted, including the number of slots used for HARQ retransmission of subbursts.

Number of Slots Occupied by Non-MIMO-B Users in DL PUSC All Zone 16QAM1/2 with Dedicated Pilots

Total number of slots occupied by MIMO-A and non-MIMO MSs (using dedicated pilots) in the PUSC All zone on the downlink when the MCS mode is 16QAM1/2. The number of slots occupied by management connections and traffic connections is counted, including the number of slots used for HARQ retransmission of subbursts.









Number of Slots Occupied by Non-MIMO-B Users in DL Partial Zone QPSK1/2Rep2 with Dedicated Pilots

Total number of slots occupied by MIMO-A and non-MIMO MSs (using dedicated pilots) in the PUSC Partial zone on the downlink when the MCS mode is QPSK1/2REP2. The number of slots occupied by management connections and traffic connections is counted, including the number of slots used for HARQ retransmission of subbursts.


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Performance Counter

Description





Number of Slots Occupied by Non-MIMO-B Users in DL Partial Zone QPSK1/2 with Dedicated Pilots

Total number of slots occupied by MIMO-A and non-MIMO MSs (using dedicated pilots) in the PUSC Partial zone on the downlink when the MCS mode is QPSK1/2. The number of slots occupied by management connections and traffic connections is counted, including the number of slots used for HARQ retransmission of subbursts.

Number of Slots Occupied by Non-MIMO-B Users in DL Partial Zone QPSK3/4 with Dedicated Pilots

Total number of slots occupied by MIMO-A and non-MIMO MSs (using dedicated pilots) in the PUSC Partial zone on the downlink when the MCS mode is QPSK3/4. The number of slots occupied by management connections and traffic connections is counted, including the number of slots used for HARQ retransmission of subbursts.

Number of Slots Occupied by Non-MIMO-B Users in DL Partial Zone 16QAM1/2 with Dedicated Pilots

Total number of slots occupied by MIMO-A and non-MIMO MSs (using dedicated pilots) in the PUSC Partial zone on the downlink when the MCS mode is 16QAM1/2. The number of slots occupied by management connections and traffic connections is counted, including the number of slots used for HARQ retransmission of subbursts.






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Performance Counter

Description





Number of Slots Occupied by MIMO-B Users in DL PUSC All Zone QPSK1/2 with Dedicated Pilots

Total number of slots occupied by MIMO-B MSs (using dedicated pilots) in the PUSC All zone on the downlink when the MCS mode is QPSK1/2. The number of slots occupied by management connections and traffic connections is counted, including the number of slots used for HARQ retransmission of subbursts.

Number of Slots Occupied by MIMO-B Users in DL PUSC All Zone QPSK3/4 with Dedicated Pilots

Total number of slots occupied by MIMO-B MSs (using dedicated pilots) in the PUSC All zone on the downlink when the MCS mode is QPSK3/4. The number of slots occupied by management connections and traffic connections is counted, including the number of slots used for HARQ retransmission of subbursts.

Number of Slots Occupied by MIMO-B Users in DL PUSC All Zone 16QAM1/2 with Dedicated Pilots

Total number of slots occupied by MIMO-B MSs (using dedicated pilots) in the PUSC All zone on the downlink when the MCS mode is 16QAM1/2. The number of slots occupied by management connections and traffic connections is counted, including the number of slots used for HARQ retransmission of subbursts.






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Performance Counter

Description







Number of Slots Occupied by MIMO-B MSs in the DL Partial Zone QPSK1/2 with Dedicated Pilots

Total number of slots occupied by MIMO-B MSs (using dedicated pilots) in the PUSC Partial zone on the downlink when the MCS mode is QPSK1/2. The number of slots occupied by management connections and traffic connections is counted, including the number of slots used for HARQ retransmission of subbursts.

Number of Slots Occupied by MIMO-B MSs in the DL Partial Zone QPSK3/4 with Dedicated Pilots

Total number of slots occupied by MIMO-B MSs (using dedicated pilots) in the PUSC Partial zone on the downlink when the MCS mode is QPSK3/4. The number of slots occupied by management connections and traffic connections is counted, including the number of slots used for HARQ retransmission of subbursts.

Number of Slots Occupied by MIMO-B MSs in the DL Partial Zone 16QAM1/2 with Dedicated Pilots

Total number of slots occupied by MIMO-B MSs (using dedicated pilots) in the PUSC Partial zone on the downlink when the MCS mode is 16QAM1/2. The number of slots occupied by management connections and traffic connections is counted, including the number of slots used for HARQ retransmission of subbursts.




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Performance Counter

Description









Number of Bytes Scheduled by MIMO-B MSs in the DL PUSC All Zone with Dedicated Pilots

Total number of bytes scheduled for MIMO-B MSs (using dedicated pilots) in the PUSC All zone of a sector carrier within a measurement period. This counter indicates the traffic volume of MIMO-B MSs using dedicated pilots.

Number of Bytes Scheduled by Non-MIMO-B MSs in the DL PUSC All Zone with Dedicated Pilots

Total number of bytes scheduled for MIMO-A and non-MIMO MSs (using dedicated pilots) in the PUSC All zone of a sector carrier within a measurement period. This counter indicates the traffic volume of MIMO-A and non-MIMO MSs using dedicated pilots.

Number of Bytes Scheduled by MIMO-B MSs in the DL Partial Zone with Dedicated Pilots

Total number of bytes scheduled for MIMO-B MSs (using dedicated pilots) in the PUSC Partial zone of a sector carrier within a measurement period. This counter indicates the traffic volume of MIMO-B MSs using dedicated pilots.

Number of Bytes Scheduled by Non-MIMO-B MSs in the DL Partial Zone with Dedicated Pilots

Total number of bytes scheduled for MIMO-A and non-MIMO MSs (using dedicated pilots) in the PUSC Partial zone of a sector carrier within a measurement period. This counter indicates the traffic volume of MIMO-A and non-MIMO MSs using dedicated pilots.


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Performance Counter

Description

Number of Slots Scheduled For Non-MIMO-B MSs in the DL Partial Zone with Dedicated Pilots

Number of slots scheduled for MIMO-A and non-MIMO MSs (using dedicated pilots) in the PUSC Partial zone of a sector carrier within a measurement period, including the number of slots used for HARQ retransmission. Scheduled slots are less than occupied slots because scheduled slots do not include any slots wasted due to resource allocation limitation.

Number of Slots Scheduled For Non-MIMO-B MSs in the DL PUSC All Zone with Dedicated Pilots

Number of slots scheduled for MIMO-A and non-MIMO MSs (using dedicated pilots) in the PUSC All zone of a sector carrier within a measurement period, including the number of slots used for HARQ retransmission. Scheduled slots are less than occupied slots because scheduled slots do not include any slots wasted due to resource allocation limitation.

Number of Slots Scheduled For MIMO-B MSs in the DL Partial Zone with Dedicated Pilots

Number of slots scheduled for MIMO-B MSs (using dedicated pilots) in the PUSC Partial zone of a sector carrier within a measurement period, including the number of slots used for HARQ retransmission. Scheduled slots are less than occupied slots because scheduled slots do not include any slots wasted due to resource allocation limitation.

Number of Slots Scheduled For MIMO-B MSs in the DL PUSC All Zone with Dedicated Pilots

Number of slots scheduled for MIMO-B MSs (using dedicated pilots) in the PUSC All zone of a sector carrier within a measurement period, including the number of slots used for HARQ retransmission. Scheduled slots are less than occupied slots because scheduled slots do not include any slots wasted due to resource allocation limitation.

Average Number of MIMO-BF Users

Average number of users that support MIMO but use only BF (MIMO-BF users) on a carrier within a measurement period. This counter is used to indicate the distribution of MIMO-BF users on a carrier.

Average Number of MIMO B+BF Users

Average number of users that use MIMO B and BF at the same time (MIMO B+BF users) on a carrier within a measurement period. This counter is used to indicate the distribution of MIMO B+BF users on a carrier.

Number of Attempts to Detect the CQICH

Total number of times the BS checks CQICHs on a sector carrier within a measurement period. This counter is used to calculate the percentage of missing CQICH checks.

Number of Times the CQICH Is Not Detected

Number of missing CQICH checks on a sector carrier. This counter is used to calculate the percentage of missing CQICH checks.


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Performance Counter

Description

Number of Slots Unoccupied in the CDD Zone

Total number of slots unoccupied in the CDD zone within a measurement period. This counter indicates whether resources are wasted in the CDD zone. If a large number of slots are unoccupied during busy hours, scheduling may be inefficient.

Number of Slots Unoccupied in the STC Zone

Total number of slots unoccupied in the STC zone within a measurement period. This counter indicates whether resources are wasted in the STC zone. If a large number of slots are unoccupied during busy hours, scheduling may be inefficient.

Number of Slots Unoccupied in the DP Zone

Total number of slots unoccupied in the DP zone within a measurement period. This counter indicates whether resources are wasted in the DP zone. If a large number of slots are unoccupied during busy hours, scheduling may be inefficient.

Number of Slots Unoccupied in the STC+DP Zone

Total number of slots unoccupied in the STC+DP zone within a measurement period. This counter indicates whether resources are wasted in the STC+DP zone. If a large number of slots are unoccupied during busy hours, scheduling may be inefficient.

Fault ManagementA BS attempts to calibrate channels when beamforming is enabled. If channel calibration fails, the BS reports the alarm ALM-28642 Carrier Channel Calibration Failed, and attempts to periodically calibrate channels until the alarm is cleared.

3.11.6 Other NEsMSs that support dedicated pilots must be used.


3.12 UL 64QAM3.12.1 Description

UL 64QAM enables a BS to modulate data packets with high modulation and coding efficiency. It significantly increases UL throughput in optimal radio channel conditions.


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BS UL throughput increases.

Network PerformanceUL throughput increases on MSs with strong UL signals.




The value range of the FECTYPE parameter is changed in the MOD ULAMCTHRESH command to support the setting of AMC thresholds in UL 64QAM mode.

The FECTYPE parameter is modified in the following commands to support the setting of UCD profiles in UL 64QAM mode: − ADD UCDBURSTPROFILE− MOD UCDBURSTPROFILE

Performance CountersTable 3-1 describes new performance counters related to UL 64QAM.

Table 3-1 New performance counters related to UL 64QAM

Performance Counter

Description

Online Duration of Users in UL 64QAM1/2(CTC) Non-MIMO-B User

User online duration on the uplink when the MCS is 64QAM1/2 (CTC). The accumulated duration is measured within a measurement period. the accumulated duration is measured. The measurement result includes the duration of users using this MCS during network access. The measurement targets at the users in All Zone and Partial Zone. The duration of non-MIMO and MIMO-A users and the duration of MIMO-B users are measured separately. This measurement counter cooperates with other measurement counters to evaluate the quality of uplink channels on a sector carrier and the distribution of users' MCS modes.


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Performance Counter

Description








3.12.6 Other NEsMSs that support UL 64QAM must be used.



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3.13 Enhanced Assignment3.13.1 Description

In V300R002C03, assignment is supported between intra-sector carriers. After this function is enabled, the BS assigns an MS to enter the network through another intra-sector carrier if both of the following conditions are met:

The MS fails to enter the network through a carrier, because the load is greater than the network entry threshold.

The load of the intra-sector carrier whose network the MS attempts to enter is less than the network entry threshold.

In V300R003C01, assignment can be performed between sectors or between BSs. If the load of all intra-sector carriers is greater than the network entry threshold, the BS assigns an MS to the network through another intra-BS sector or a neighboring BS.



Network PerformanceThe network entry success rate increases.




The NBRHASWITCH parameter is added in the MOD LOADCTRLPARA command to specify whether assignment is enabled for neighboring BSs.


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Performance CountersTable 3-1 describes new performance counters related to enhanced assignment.

Table 3-1 New performance counters related to enhanced assignment

Performance Counter

Description

Inter-Sector Round-Robin Assignment Times

Times of successful inter-sector round-robin assignment initiated when the BS determines admission within the measurement period. This measurement counter is used to discriminate intra-sector round-robin assignment times from inter-sector round-robin assignment times.

Times of Admission Assignment in Initial Network Entry

Times of successful admission assignment when assignment is implemented due to MS admission failure in initial network entry. This measurement counter reflects the times of successful inter-frequency assignment implemented when the load reaches its threshold in MS initial network entry on a sector carrier. In this way, you can find out whether the MS network entry is affected by the load of the sector carrier.

Times of Admission Assignment in Network Re-Entry After Idle Mode

Times of successful admission assignment when assignment is implemented due to MS admission failure in network re-entry after the idle mode. This measurement counter reflects the times of successful inter-frequency assignment implemented when the load reaches its threshold in MS network re-entry after the idle mode on a sector carrier. In this way, you can find out whether the load of the sector carrier affects MS network re-entry after the idle mode.

Number of Network Entry Failures due to Inter-Frequency Assignment Caused by No Access Permission

Number of times the MS is assigned to another sector due to causes such as system load within a measurement period. This counter is used when the feature of inter-frequency assignment is enabled. It is used to measure system load and to obtain the state of inter-frequency assignment.


3.13.6 Other NEsMSs that support assignment must be used.



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3.14 Inter-User QoS3.14.1 Description

There are four subscriber classes in Huawei WiMAX system: gold, silver, bronze, and common. Using different subscriber classes allows you to provide differentiated services for subscriber classes based on their priorities, which ensures service quality for high-priority MSs.

Inter-user QoS polices are implemented as follows:

For network entry, high-priority MSs preempt bandwidth resources allocated to low-priority online MSs if BS bandwidth resources are insufficient. This increases the network entry success rate of high-priority MSs.

Low-priority MSs are preferentially selected for a load balancing handover or for data rate reduction.

High-priority MSs are preferentially selected for service scheduling.



Network PerformanceThis function improves the service experience of high-priority MSs, but may affect service experience of low-priority MSs if the BS load is heavy.




The following parameters are added to the MOD LOADCTRLPARA and LST LOADCTRLPARA commands:− WEIGHTFORGOLDUSER− WEIGHTFORSILVERUSER− WEIGHTFORCUPRUMUSER− WEIGHTFORCOMMONUSER − REAVESWITCH − REAVETHRES− LOADCTRLPRI− LOADHOPRI


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In V300C003C01, the following commands are used to set and query the settings of weight factors for MS scheduling: − MOD QOSFACTOR− LST QOSFACTOR

These two commands were added to V300C002C03 but weight factors for MS scheduling were not used.

Performance CountersTable 3-1 describes new performance counters related to inter-user QoS.

Table 3-1 New performance counters related to inter-user QoS

Performance Counter

Description

Times of Successful UL Preemption in Initial Network Entry

Times of successful UL preemption after service flow admission failure within a measurement period during initial network entry. This measurement counter indicates the times when preemption of UL resources is successful in initial network entry.

Times of Successful DL Preemption in Initial Network Entry

Times of successful DL preemption after service flow admission failure within a measurement period during initial network entry. This measurement counter indicates the times when preemption of DL resources is successful in initial network entry.

Times of Successful UL Preemption in Network Re-Entry After Idle Mode

Times of successful UL preemption after service flow admission failure within a measurement period during network re-entry after the idle mode. This measurement counter indicates the times when preemption of UL resources is successful in network re-entry after the idle mode.

Times of Successful DL Preemption in Network Re-Entry After Idle Mode

Times of successful DL preemption after service flow admission failure within a measurement period during network re-entry after the idle mode. This measurement counter indicates the times when preemption of DL resources is successful in network re-entry after the idle mode.

Times of Successful UL Preemption in Network Re-Entry After Handover

Times of successful preemption after service flow admission failure within a measurement period during handover and network re-entry. This measurement counter indicates the times when preemption of UL resources is successful in handover and network re-entry.

Times of Successful DL Preemption in Network Re-Entry After Handover

Times of successful preemption after service flow admission failure within a measurement period during handover and network re-entry. This measurement counter indicates the times when preemption of DL resources is successful in handover and network re-entry.


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Performance Counter

Description

Successful UL Preemption Times of Dynamical Service Flow (DSA)

Times of successful UL preemption after DSA admission failure within a measurement period.

Successful DL Preemption Times of Dynamical Service Flow (DSA)

Times of successful DL preemption after DSA admission failure within a measurement period.

Successful UL Preemption Times of Dynamical Service Flow (DSC)

Times of successful UL preemption after DSC admission failure within a measurement period.

Successful DL Preemption Times of Dynamical Service Flow (DSC)

Times of successful DL preemption after DSC admission failure within a measurement period.

UL Rate Decrease Times of Gold User on Sector Carrier

Times of UL rate decrease of the gold user triggered by the load balancing algorithm within a measurement period. Rate decrease is aimed at connections. Any rate decrease of UL connections of the gold user is measured. The measurement is accumulated if the rates of several UL connections of the gold user are decreased at the same time. This measurement counter reflects the influence of load balancing algorithm on the UL service of the gold user.

UL Rate Decrease Times of Silver User on Sector Carrier

Times of UL rate decrease of the silver user triggered by the load balancing algorithm within a measurement period. Rate decrease is aimed at connections. Any rate decrease of UL connections of the silver user is measured. The measurement is accumulated if the rates of several UL connections of the silver user are decreased at the same time. This measurement counter reflects the influence of load balancing algorithm on the UL service of the silver user.

UL Rate Decrease Times of Copper User on Sector Carrier

Times of UL rate decrease of the copper user triggered by the load balancing algorithm within a measurement period. Rate decrease is aimed at connections. Any rate decrease of UL connections of the copper user is measured. The measurement is accumulated if the rates of several UL connections of the copper user are decreased at the same time. This measurement counter reflects the influence of load balancing algorithm on the UL service of the copper user.


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Performance Counter

Description

UL Rate Decrease Times of Ordinary User on Sector Carrier

Times of UL rate decrease of the ordinary user triggered by the load balancing algorithm within a measurement period. Rate decrease is aimed at connections. Any rate decrease of UL connections of the ordinary user is measured. The measurement is accumulated if the rates of several UL connections of the ordinary user are decreased at the same time. This measurement counter reflects the influence of load balancing algorithm on the UL service of the ordinary user.

DL Rate Decrease Times of Gold User on Sector Carrier

Times of DL rate decrease of the gold user triggered by the load balancing algorithm within a measurement period. Rate decrease is aimed at connections. Any rate decrease of DL connections of the gold user is measured. The measurement is accumulated if the rates of several DL connections of the gold user are decreased at the same time. This measurement counter reflects the influence of load balancing algorithm on the DL service of the gold user.

DL Rate Decrease Times of Silver User on Sector Carrier

Times of DL rate decrease of the silver user triggered by the load balancing algorithm within a measurement period. Rate decrease is aimed at connections. Any rate decrease of DL connections of the silver user is measured. The measurement is accumulated if the rates of several DL connections of the silver user are decreased at the same time. This measurement counter reflects the influence of load balancing algorithm on the DL service of the silver user.

DL Rate Decrease Times of Copper User on Sector Carrier

Times of DL rate decrease of the copper user triggered by the load balancing algorithm within a measurement period. Rate decrease is aimed at connections. Any rate decrease of DL connections of the copper user is measured. The measurement is accumulated if the rates of several DL connections of the copper user are decreased at the same time. This measurement counter reflects the influence of load balancing algorithm on the DL service of the copper user.

DL Rate Decrease Times of Ordinary User on Sector Carrier

Times of DL rate decrease of the ordinary user triggered by the load balancing algorithm within a measurement period. Rate decrease is aimed at connections. Any rate decrease of DL connections of the ordinary user is measured. The measurement is accumulated if the rates of several DL connections of the ordinary user are decreased at the same time. This measurement counter reflects the influence of load balancing algorithm on the DL service of the ordinary user.

UL Rate Restoration Times of Gold User on Sector Carrier

Times of UL rate increase of the gold user triggered by the load balancing algorithm within a measurement period. Rate restoration is aimed at connections. Any rate restoration of UL connections of the gold user is measured. The measurement is accumulated if the rates of several UL connections of the gold user are restored at the same time. This measurement counter reflects the influence of load balancing algorithm on the UL service of the gold user.


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Performance Counter

Description

UL Rate Restoration Times of Silver User on Sector Carrier

Times of UL rate increase of the silver user triggered by the load balancing algorithm within a measurement period. Rate restoration is aimed at connections. Any rate restoration of UL connections of the silver user is measured. The measurement is accumulated if the rates of several UL connections of the silver user are restored at the same time. This measurement counter reflects the influence of load balancing algorithm on the UL service of the silver user.

UL Rate Restoration Times of Copper User on Sector Carrier

Times of UL rate increase of the copper user triggered by the load balancing algorithm within a measurement period. Rate restoration is aimed at connections. Any rate restoration of UL connections of the copper user is measured. The measurement is accumulated if the rates of several UL connections of the copper user are restored at the same time. This measurement counter reflects the influence of load balancing algorithm on the UL service of the copper user.

UL Rate Restoration Times of Ordinary User on Sector Carrier

Times of UL rate increase of the ordinary user triggered by the load balancing algorithm within a measurement period. Rate restoration is aimed at connections. Any rate restoration of UL connections of the ordinary user is measured. The measurement is accumulated if the rates of several UL connections of the ordinary user are restored at the same time. This measurement counter reflects the influence of load balancing algorithm on the UL service of the ordinary user.

DL Rate Restoration Times of Gold User on Sector Carrier

Times of DL rate increase of the gold user triggered by the load balancing algorithm within a measurement period. Rate restoration is aimed at connections. Any rate restoration of DL connections of the gold user is measured. The measurement is accumulated if the rates of several DL connections of the gold user are restored at the same time. This measurement counter reflects the influence of load balancing algorithm on the DL service of the gold user.

DL Rate Restoration Times of Silver User on Sector Carrier

Times of DL rate increase of the silver user triggered by the load balancing algorithm within a measurement period. Rate restoration is aimed at connections. Any rate restoration of DL connections of the silver user is measured. The measurement is accumulated if the rates of several DL connections of the silver user are restored at the same time. This measurement counter reflects the influence of load balancing algorithm on the DL service of the silver user.

DL Rate Restoration Times of Copper User on Sector Carrier

Times of DL rate increase of the copper user triggered by the load balancing algorithm within a measurement period. Rate restoration is aimed at connections. Any rate restoration of DL connections of the copper user is measured. The measurement is accumulated if the rates of several DL connections of the copper user are restored at the same time. This measurement counter reflects the influence of load balancing algorithm on the DL service of the copper user.


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Performance Counter

Description

DL Rate Restoration Times of Ordinary User on Sector Carrier

Times of DL rate increase of the ordinary user triggered by the load balancing algorithm within a measurement period. Rate restoration is aimed at connections. Any rate restoration of DL connections of the ordinary user is measured. The measurement is accumulated if the rates of several DL connections of the ordinary user are restored at the same time. This measurement counter reflects the influence of load balancing algorithm on the DL service of the ordinary user.


3.14.6 Other NEsHuawei AAA server and ASN-GW that support inter-user QoS must be used.


3.15 Power Saving Scheduling3.15.1 Description

Power saving scheduling enables a BS to transmit service data using the start part of a DL subframe and to stop power amplification after data transmission. This eliminates power consumption due to pilot transmission and static power consumption due to power amplifiers when no data is transmitted on the DL. As a result, BS power consumption decreases.

Figure 3-1 shows data transmission in the DL subframe when power saving scheduling is enabled.


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Figure 3-1 Data transmission in the DL subframe when power saving scheduling is enabled







The TXPWRSAVSWITCH parameter is added to the MOD BSSWITCH command.



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3.15.7 Other FeaturesIf a large number of DL zones are configured, BS power consumption does not significantly decrease due to zone boundary limitations. In this case, this function should be disabled.

3.16 R6 Interoperability Based on the NWG R1.2 or NWG R1.33.16.1 Description

V300R002C03 supports the R6 interface complying with the NWG R1.0 and R1.2.

In addition to the R6 interface based on the NWG R1.0 and R1.2, V300C003C01 also supports the R6 interface based on the NWG R1.3. This facilitates interoperability between NEs supplied by different vendors, and reduces the requirements for matching R6 interfaces between the BS and the ASN-GW.





3.16.4 Inter-NE InterfacesR6 interfaces based on the NWG R1.0, R1.2, and R1.3 are supported.


The NWGVERSION parameter is added to the following commands:

MOD SIGENHCFG LST SIGENHCFG


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The NWGVERSION parameter can be set to one of the following values:

PRE_12: The BS uses the R6 interface based on the NWG R1.0. NWG_12: The BS uses the R6 interface based on the NWG R1.2. NWG_13: The BS uses the R6 interface based on the NWG R1.3. AUTO: The BS uses the R6 interface based on the NWG R1.2 or R1.3, which is

determined in the first message that the ASN-GW sends to the BS over the R6 interface during MS network entry. In the message header, if S bit is set to 1, the R6 interface complies with the NWG R1.3, and if S bit is set to 0, the R6 interface complies with the NWG R1.2 or earlier.

For a new BS of V300C003C01, the default value of the NWGVERSION parameter is AUTO.

For a BS upgraded from V300C002C03 to V300C003C01, the R6 interface is used based on the same NWG version as that used before the upgrade. This ensures that the R6 interfaces on the BS and the ASN-GW complies with the same NWG protocol.



3.16.6 Other NEsThe R6 interfaces on the ASN-GW and the BS must comply with the same NWG protocol.

3.16.7 Other FeaturesBSs of V300C003C01 do not support NWG R1.3-based R6 messages or TLV if they communicate with the ASN-GW over the R6 interface that complies with the NWG R1.2 or an earlier version.


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WiMAX BTS V300R003C01Network Impact Report (Compared with V300R002C03) B Terms

A Terms

S

Safety zone A zone configured to prevent interference on UL common bands. No data is transmitted in the safety zone.

P

Prepared handover A handover during which the serving BS notifies the target BS of a handover and then an MS reenters the network on the target BS.


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WiMAX BTS V300R003C01Network Impact Report (Compared with V300R002C03) B Acronyms and Abbreviations

B Acronyms and Abbreviations

A

AMC adaptive modulation and coding

ARQ automatic repeat request

ASN access service network

ASN-GW access service network gateway

B

BBBI BWA baseband processing and radio interface unit

BE best effort

BF beamforming

BS base station

C

CINR carrier-to-interference-and-noise ratio

CSM collaborative spatial multiplexing

D

DI data integrity

E

EFFR enhanced fractional frequency reuse

ertPS extended real-time polling service


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F

FFR fractional frequency reuse

G

GPS Global Positioning System

H

HO handover

I

IRC interference rejection combining

L

LTE long term evolution

M

MAC media access control

MCS modulation and coding scheme

MML man-machine language

MIMO multiple-input multiple-output

MPR modulation order product code rate

MS mobile station

N

NI noise index

NWG network working group

P

PHS payload header suppression

PUSC partial usage of subchannels

RRU remote radio unit

S


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SDMA space division multiple access

SRD system requirements document

SS subscriber station

T

TDD time division duplex

TLV type/length/value

TTG transmit transition gap

W

WCS WiMAX configuration system

WiMAX World Interoperability for Microwave Access


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Documents

WiMAX BTS Network Impact Report