S01M02_2 Indicators Overview

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Module 2Indicators Overview

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Section 1B11 GSM QoS Monitoring

GSM B11BSS B11 GSM Quality of Service & Traffic Load Monitoring

TMO18096 D0 SG DEN I1.0 Issue 1




GSM B11 · BSS B11 GSM Quality of Service & Traffic Load MonitoringB11 GSM QoS Monitoring · Indicators Overview1 · 2 · 2

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First edition B11 MR1Xavier Pourtauborde29-June-201001

RemarksAuthorDateEdition

Document History





Module Objectives

Upon completion of this module, you should be able to:

Explain what is a detailed indicator and what are the different classifications of the detailed indicators provided by the Alcatel-Lucent BSS





Module Objectives [cont.]






Table of Contents

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1 Indicators Reference Name 7Description 8

2 Indicators Classification 9BSS Counter Collection Mechanism 10BSS Performance Measurement Types 11Classification of GSM Indicators 12Formalism of Telecom Procedures 13SDCCH Traffic 14TCH Traffic 15QoS SDCCH 16QoS RTCH 17QoS Call Statistics 18Handover Causes 19Outgoing Handovers 20Incoming Handovers 21Intracell Handovers 22Handover Statistics per Couple of Cells 23Self-assessment on the Objectives 24End of Module 25





Table of Contents [cont.]

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1 Indicators Reference Name





1 Indicators Reference Name

Description

Each QOS indicator has a unique REFERENCE NAME of 10 characters.

UnitFamily

Procedure Type JokerPrefix Sub-type

mandatory

optionalTechnology

B11

Tehnology: G (GSM), U (UMTS), W (WiMaX)





2 Indicators Classification






BSS Counter Collection Mechanism

CumulativeThe counter is incremented at the occurrence of a specific event.Abis or A message, or internal event.At the end of a collection period, the result is the sum of the events.

InspectionEvery 20 or 10 seconds, a task quantifies an internal resource status (usually a table).At the end of a collection period, the result is the mean value.

ObservationSet of recorded information about a telecom procedure (handover, channel release, UL & DL measurements reporting).

Radio Measurement StatisticsAggregation of all "Measurement Results" for a day and a TRX/Cell.






BSS Performance Measurement Types

2G Traffic flow meas.180Overview meas.110

B11IP transport35B9Voice Group Call Services34B9Electro-Magnetic Emission 33B8Change of frequency band meas.32

Radio Measurement Statistics31SMS CB meas.30Directed retry meas.29SDCCH HO28

1 cell2G TCH incoming HO per adj. meas.2740 cellsTCH outgoing HO per adj. meas.26

SCCP meas.25SMS PP meas.19A interface meas.18

15 cellsTCH observation1515 cellsOutgoing external HO obs.1415 cellsIncoming external HO obs.1315 cellsInternal HO obs.121 cellTCH meas. obs.11

15 cellsSDCCH obs.10N7 meas.9X25 meas.8LapD meas.7

40 cellsTCH HO meas.640 cellsResource usage on TCH meas.540 cellsResource usage on SDCCH meas.440 cellsResource usage on CCCH meas.340 cellsResource availability meas.240 cellsTraffic meas.1

Since …LimitationsNameType

B11

A standard PM type can be activated for the whole network. It means that the related counters are reported for all the Network Elements they are implemented on (TRX, CELL, N7 link, X25 link, LAPD link, Adjacency).

A detailed PM type can be activated only on a sub-set of the network. It means that the related counters are reported only for a limited number of Network Elements:

40 cells per BSS for PM types 1, 2, 3, 4, 5, 6, 26, 29

15 cells per BSS for PM types 10, 12, 13, 14, 15

1 cell per BSS for PM types 11, 27

Counter numbering rules:

Cyz: cumulative or inspection counters in PM types 1, 2, 3, 4, 5, 6, 18, 19, 25, 26, 27, 28, 29, 30, 32, 180

Ly.z: cumulative counters in PM type 7 (L stands for LAPD link)

Xy.z: cumulative counters in PM type 8 (X stands for X25 link)

Ny.z: cumulative counters in PM type 9 (N stands for N7 link)

Syz: observation counters in PM type 10 (S stands for SDCCH)

Ryz:: observation counters in PM type 11 (R stands for Radio measurements)

HOyz: observation counters in PM type 12, 13, 14 (HO stands for HandOver)

Tyz: observation counters in PM type 15 (T stands for TCH)

RMSyz: cumulative counters in PM type 31 (RMS stands for Radio Measurement Statistics)

MCyz or MNy.z: cumulative counters in PM type 110 (M stands for Major)






Classification of GSM Indicators

Control Channels

Traffic load

Call statistics

Global QoS Handover Resource availability

Multiband

Densification techniques

GSM indicators

3G to 2G HOA Channel availability

SCCP

TCH

RTCH

Couple of cell

SDCCH/TCH HO

Intracell HO

Multilayer / Multiband Network

Concentric cells

Inter-PLMN HO

SDCCH availability

RTCH availability

SDCCH

Outgoing HO Directed retryDynamic SDCCHSDCCH

Incoming HO

HO causes






Formalism of Telecom Procedures

“Telecom procedure”-ATTEMPT

“Telecom procedure”-SUCCESS

“Telecom procedure”-whose channel is ALLOCATED in BSC

channel activationfailure

assignment/HOexecution failure

PREPARATION phase

EXECUTION phase failure in channel

established phase

the MS has seized the channel

- radio link failure- handover execution failure(with or without reversionto the old channel)- BSS problem- NSS problem

- radio link failure- BSS problem- NSS problem

“Telecom procedure”-REQUEST

- BSS problem- NSS problem

- congestion

no resource availablein BSC

resource availablein the BSC

channel activationsuccess

(start)

(end)Success Rate = (Success) / (Request)Efficiency Rate = (Success) / (Allocated)Unsuccessful Rate = (Preparation & Execution Failures) / (Request)Failure Rate = (Failure) / (Request)






SDCCH Traffic

Traffic Load and Traffic Model SDCCH traffic

Estab

SDCCH Traffic

TrafficMT

TrafficMO

Loc. Update

IMSI Detach

Sup. Service

Call

LU Follow on

SMS

CallRe-Estab

Other

MSPenetration Rate

TrafficDual Band

ResourceOccupancy

SDCCHErlang

SDCCH MeanHolding TimeGlobal

Traffic

GlobalRequests

TrafficModel

HandoverNormalAssignment

NormalAssignment

Handover

The Traffic model section includes indicators for:

number of SDCCH connection requests and successes (Immediate Assignment, HO).

distribution of SDCCH connection success (MO and MT connections versus all MO+MT connections, type of MO connections versus all MO connection types).

The MS penetration rate section includes the indicator for percentage of multiband MS SDCCH access (except LU) versus all MS SDCCH accesses.

The Resource occupancy section includes indicators for:

SDCCH traffic in Erlang.

average duration in seconds of SDCCH channel usage.






TCH Traffic

Traffic Load and Traffic ModelTCH traffic RTCH Traffic

ResourceOccupancy

TCHErlang

Full RateErlang

Full RateAllocated

Full RateMean TCH

Time

Half RateErlang

Half RateAllocated

Half RateMean TCH

Time

Blocking Peak

Ratio ofHR Traffic

TCHMultibandOccupancy

Traffic Model

REQUESTSAssign / HO / DR

SUCCESSAssign/ HO/ DR

HO PER CALL

REQUESTSFR, DR, DR/EFR, AMR, DATA

Speech Version&

Channel Type

ALLOCATIONSFR, HR, EFR, AMR, DATA

SUCCESSAMR / TFO

The Speech Version and Channel Type section includes indicators for:

distribution of TCH allocation requests (FR/DR/DR+EFR/AMR/DATA).

distribution of TCH allocation successes (FR/DR/DR+EFR/AMR/DATA).

rate of TCH AMR allocation successes.

rate of TFO calls versus all speech calls.

The Traffic model section includes indicators for:

number of TCH connection requests and successes (Normal Assignment, HO, DR).

rate of TCH allocation successes for HO+DR versus all TCH allocations (NA+HO+DR).

number of HOs per call.

The Resource occupancy section includes indicators for:

RTCH traffic in Erlang (FR+HR, FR, HR, multiband).

average duration in seconds of RTCH channel usage (FR+HR, FR, HR).

number of TCH FR allocations and number of TCH HR allocations.

rate of TCH HR allocations versus all TCH allocations (FR+HR).

TCH peak of blocking (TCH congestion time).






QoS SDCCH

GLOBAL Quality of ServiceSDCCH

SDCCH

EstablishedPhase

Drop Rate

Drop Radio Drop HO

Unsuccess

Congestion

Assignment Phase/

Handover

RadioFailure

BSS Failure

Access Reject

Dynamic Allocation

Drop BSS






QoS RTCH

GLOBAL Quality of service RTCH

DirectedRetry

RTCH

Unsuccess

Assignment Phase/

Handover

Global RadioCongestion Level

Congestion

RadioFailure

BSSFailure

EstablishedPhase

Drop rate

Drop Radio

Drop BSS

Drop HO

Preemption

PreemptionPhase

PCI =1 PVI =1

Requests

Allocationwith / withoutPreemption

Failure

Success

Success

QueuingPhase

Queue Length

AssignQueuing Fail

AssignQueued

& Reject

QueuedSuccess

Queue Full

HigherPriority

Timeout

AssignQueued

NormalAssign.






QoS Call Statistics

GLOBAL Quality of serviceCall statistics Call Statistics

Call Success

Call SetupSuccess Rate

CallSuccess Rate

Cell QualityFactor Absolute

Cell QualityFactor Relative

Call Drop

Call Drop Rate

Drop Radio Drop BSSDrop HO

Transcoder Failure

BSS Internal Failure

Call DropEnd User Rate

Preemption

End to End Call Setup

Success Rate






Handover Causes

Handover STATISTICSHandover causes

Handover causes

HO causes

All HO

cause distribution

Outgoing HO Incoming HO

HO standardcause

distribution

HO cause category

distribution

HO causes per Adjacency

HO cause category

distribution

Fast traffic HO taken into account type of counter for dual band HO






Outgoing Handovers

Handover STATISTICSOutgoing handovers

Failure With Reversion

Call Drop Rate

Efficiency

Preparation Success Rate

Intra-BSC


Call Drop Rate

Efficiency


External

Call Drop Rate

Efficiency

Success Rate

Intra-BSC & External

Outgoing HO

LAPD counter to analyze the cause of delay in HO procedures






Incoming Handovers

Handover STATISTICSIncoming handovers

Failure BSS

Failure Radio

Congestion

Efficiency

Intra-BSC

Failure BSS

Failure Radio

Failure No CIC

Congestion

Efficiency

External

Efficiency

Intra-BSC & External

Incoming HO

Incoming external HO 3G - > 2G

Incoming external HO 2G - > 2G only






Intracell Handovers

Handover STATISTICSIntracell handovers

New B9 counters: HO Cause 30NB_TCH_HO_REQ_30_ReturnCSZone=MC480 (Type 110)NB_TCH_HO_ATPT_30_ReturnCSZone=MC481 (Type 110)

CDR Radio CDR BSS


Failure BSS

Call Drop Rate

Congestion

Efficiency

Intracell HO






Handover Statistics per Couple of Cells

Handover STATISTICSHandover statistics per couple of cell

HO Success Distribution

Success Rate

Efficiency


HO statisticsper Couple of Cell





Self-assessment on the Objectives

Please be reminded to fill in the formSelf-Assessment on the Objectivesfor this moduleThe form can be found in the first partof this course documentation





End of ModuleIndicators Overview

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S01M02_2 Indicators Overview