HUAWEI 3G KPI

7/30/2019 HUAWEI 3G KPI

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Introduction to UMTSRadio KPI

3G network planning introduce

www.huawei.com

Huawei Northwest Africa Region

RNP Solution Manage: William.chen

[email protected]

HUAWEI TECHNOLOGIES CO., LTD.

PDF created with pdfFactory Pro trial version www.pdffactory.com


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Agenda

n UMTS Radio KPI overview n 3G

Network Optimization n Case

Study of KPI Optimization

HUAWEI TECHNOLOGIES CO., LTD. Page 2



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3G KPIs Principle: S.M.A.R.T

the KPI has clear and complete definition andSpecific

formula, include check point and procedure. KPIs are

measurable by given condition, Measurable

measurement equipment and procedure. all the KPIs should be

reachable, it is refer to the Attainable

commercial network.

Relevant the KPI can show the subscriber experience

Time-bound the KPI target should be on the base of time-bound




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3G KPIs : Specific

Complete KPI definition include the formula combine with the check point

orprocedure.

The example: RRC Connection Successful Rate

n formula

RRCConnectionSuccessserviceRRCS_SR = 100%Service RRCConnect

ionAttemptservice

n Check point

The number of RRC Connection Attempt is A1

orA2?

A2 represent the effective number ofRRC

Connection Attempt.




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3G KPIs : Measurable - Drive Test

Driver test route is based onn Field Test -> Drive Testcluster, it is involved about 20

Evaluate the overall network sites in one cluster usually.

performance, usually on the network

pre-launch phase and initial stage of

commercial launch.

Test platform

Multiple test modelUEs can performdifferent tests.

Data analysis

Probe & Assistant is usedfor analyzing test data




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3G KPIs : Measurable - Stationary test

System KPI is suggested to ben Field Test ->stationary Test

test by stationary:

Evaluate the system / equipment performance. n Throughput KPI

n Delay KPI

n Quality KPICore Network

Stationary test condition is fixed,

NodeB and usually used in indoor test

scenario.

RNC

NodeB Radio Network KPI test issuggested to be test by drive test

System performance Radio Networkperformance n Call drop rate

nEquipment abilityn Handover successful raten

Radio networknTransmission planningnNetwork construct

nSpecial environmentn. condition




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3G KPIs : Measurable - Statistic test

n Statistic Test

Nastar

server

Monitoring & analysiscenter

Recommended for securityEssential

Optimization teamOM system

Pre-Condition for Statistic TestSubscriber care center

There must be enough statistic sample, thatTerminal: ordinary PC or laptop, no distance

mean network traffic should be reach highlimitationlevel.

Local networksAny corresponding dept.




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Huawei KPI test platform

comprehensive analysis of the iManagerTM M2000performance, configuration,

alarm obtaining test data

GENEX Nastar 3G

sharing of

analysis results Node BRNC

v GENEX ProbeGENEX Assistant

v AGILENT 3G Node Bv QUALCOMM HLR/AC

multiple test datav HUAWEI RNC

Node B

RNS

PSTNGENEX ProbeMSC/SSP/ PLMN

WCDMAwireless test data ISDNVLRNode B

RNCGMSC/SSP

CNGENEX U- Node B

Net

Node B RNS

network pre-planning/planning




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3G KPIs: RelevantExamples of User Experience (QoE)

completion of a End-to-end response The voice and video

download file is fast is Clare

Voice, Video Phone, MMS, WAP, Email, FTP, HTTP

Service Performance

Radio Network KPIAMR12.2, CS64k,PS64k/128k/384k, HSDPA/HSUPA

Accessibility Retainability Integrity Mobility Utilization Availability

Statistic / Measurement data




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Huawei 3G KPIs Architecture

3G KPIs

Accessability Retainability Service Integrity Mobility Delay/Latency Availability

Call Setup Call Drop PS Throughput SHO Call Setup Delay Worst CellSuccess Rate Rate Success (Voice/VP) Rate

(Voice/VP) (Voice/VP) Rate PDP Context

PDP Context PDP Hard Activation Time

Activation Context Handover RTT

Success Rate Drop Rate SuccessRate

SMS/MMS

Success Rate Inter-RAT

Handover

SuccessRate




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3G KPIs: It is not only a value

3G KPI is not only a value, but a system, for example ofCDR (Call Drop Rate)

Network Planning Network Construct Transmission optimization

Root cause drop-call

cause59.45% 10.02% 7.29% 4.56% 0.68% 0.68% 3% 2.28% 11.94%




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3G KPIs: Attainable

3G KPI is output of combination with investment include technology,

HR, cost, competition strategy etc. Cost

Huawei KPI comply principle:

nHuawei will be responsibility for every complied KPI; le

n Cooperate with Mobilis to work out a Competitive KPI; t

n Use the experience from other commercial network;

TechnicalAttainableCommon target for Mobilis and Huawei




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3G KPIs: Time-boundnMature Network

10 90

80

Drive Test KPIs 70 6050nOngoing Optimization40 30

Stationary test KPIs 20 10Number of Sites Number of Sites Network Statistics

Network StatisticsnCommercial Launch

Benchmark testNastar

Probe & Assistant

Probe & Assistant

n Pre-LaunchProbe & AssistantKPI Acceptance

Drive Test KPIs

Stationary test KPIs

nNetwork construct Site verification




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Recommend test methodology

Test Methodology Pre-launch Acceptance On-going Optimization

RRC connection success rate Drive Test -

Call setup success rate Drive Test Statistic Test

PDP activation success rate Drive Test Statistic Test

CS Call drop rate Drive Test Statistic Test

PS Call drop rate Drive Test Statistic Test

CS Call complete rate - Statistic Test

PS Call Complete rate - Statistic Test

HSPA Call drop rate Stationary Stationary

R99 PS Throughput Stationary Stationary

HSPA Throughput Stationary Stationary

Soft handover success rate Drive Test Statistic Test

Inter-RAT handover success Drive Test Statistic Test

rate




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Contents

UMTS Radio KPI overview 3G

Radio Network Optimization

Case Study of KPI Optimization




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Optimization throughout Life Cycle

RF adjustmentDrop call

Para. adjustmentCongestion

Maintenance and upgradePoor quality

Contingency planningAccess failure

Network expansionPre-launch optimization

.

Customized anddifferentiatedservices

Single site verificationBilling strategies

ReturnInvestment

RF plan review DT & CQT KPI Complaintsanalysis

ConstructionBooming phase Mature phase TimeCommercia

phaseOptimizing Balancingl launchTroubleshooting




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Network Optimization Phases

Optimization

preparation RF optimization

Service test andNew site integratedparameter optimization

Routine drive test andstats. analysisSingle site verification

Acceptance criteriaN satisfied?

Y80 sites in the YN cluster ready?

Acceptance




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RF Optimization Target

n To optimize coverage n To

minimize pilot pollution n To

optimize cell dominance n To

optimize neighbor cell listn

Toresolve RF-related drop calls




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RF Parameters Optimization

n Engineering parameters adjustment

To adjust antenna down tilt

To adjust antenna azimuth

To adjust antenna location

To adjust antenna height

To replace antenna Toreplace site To add new

cell

n Radio part parameters adjustment

To optimize neighbor cell list




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Pilot Pollution Minimization

Pilot pollution definition:

Pilot pollution will result in:n SHO candidates (A)(1) low signal quality

n Active set size (B)(2) decreased system

n If A>B, pilot pollution exists capacity

(3) Call drops easier

-60

-65 Margin

-70 Ways to optimize:

(1) Antenna adjustment-75 -62-64 -66 (e.g. azimuth or down tilt)

-68 -69-80 (2) Pilot power optimization

-85 -81

-90SC1 SC2 SC3 SC4 SC5 SC6

NotActive Set Pilot Pollution

Pilot Pollution




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Pilot Pollution: Example




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RF-related Drop Calls

Problems Appearance

n Poor coverage Poor RSCP & Ec/Io

n High interference Poor Ec/Io or RTWP

n Poor UL coverage UE max Tx power

n Poor dominance many SHO events

n Pilot pollution many cells present

n Missing neighbors

Fast change of RF conditions usuallycauses drop calls, e.g. turning a corner.




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Para. Optimization Target

Para. optimizationn To reduce access failuresis an important step

after RF optimizationn To reduce drop calls

n To enhance service quality

Service quality and network resources

utilization will be improved after para.optimization




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Parameters to be Optimized

n CCCH power allocation para.

n RL maximum power para.Seldom

adjustedn Cell re-selection para.

nIntra-freq. handover para.

An effective way ton Inter-RAT handover para. reduce drop calls

n Power control para.

n Access power para. The influence caused by the

cell parameters adjustmentn Other related para. should be analyzed carefully.




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Intra-freq. Re-selection Para.

Optimize Treselection, Qhysts andSintrasearch so as tohave minimum ping-pongandminimum camped ontowrong cell

The black dotted lineQhyst2 CPICH_Ec/Io is the serving cells.CPICH_Ec/Io

Qhyst2Qhyst2

Qhyst2

Qhyst2

The black dotted line

UEdoesntcamp is the serving cells.

onto the best cells. SintrasearchUEdoesntcamp

onto the best cells.Qqualmin

Qqualmin

Treselection TreselectionTreselection Treselection

Treselection Treselection Time

Treselection, Qhyst2, Sintrasearch = 0 Treselection, Qhyst2, Sintrasearch != 0




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Contents

UMTS Radio KPI overview 3G

Radio Network Optimization

Case Study of KPI Optimization




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Case study from commercial projects

Example of Accessibility KPI analysis

Example of Call Drop KPI issue & solution

Example of Throughput KPI issue analysis




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Example of accessibility KPIs issue

Trouble-shooting of RRC

setup and RAB assignment Breakdown of CS RAB failure (Counters)

problems: VS.RAB.FailEstCS.I VS.RAB.FailEstabCS. VS.RAB.FailEstPS. STEP1: Identify the counter with the UB.Band Other.Cell RIPFailhighest number

STEP2: Identify the Top 10 cells withBreakdown of CS RRC failure (Counters)the same problem

VS.RRC.Rej.R VS.RRC.Rej.Cod VS.RRC.Rej.UL.C RRC.FailConnEstab.Definition of Counters

L.Fail e.Cong E.Cong NoReplyl VS.RAB.FailEstPs.IUB.Band: The number of

RABs unsuccessfully established in a cell due

to IUB resource congestion causes. VS.RAB.FailEstabCS.Other.Cell: VS.RRC.Rej.UL.CE.Cong: RRC

Pre-admission control module reports setup failure due to lack of UL CE

a resource congestion. resources




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Analysis

The worstsites (cells) that have been found to have both IUB and CEcongestion issues:

n0109TO (cell id 578/579/580)

n0111TO (3882/3883/3884)

n0070TO (18641/18642/18643)

NodeB UL CE Occupation Rate

Name2007-02-19 2007-02-20 2007-02-21 2007-02-22

0070TO 120.83% 132.29% 132.29% 171.88%

0109TO 142.71% 175.00% 175.00% 180.21%

0111TO 158.33% 132.29% 132.29% 148.96%




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Suggested solution

A comparative analysis shows that, if excluding the problematic sites,the KPI would improve substantially, say, AMR RAB assignment successrate from 97.79% to 98.09%:

KPIs (including IUB KPIs (without IUB

Congestion sites) Congestion sites)

RRC Connection Setup Success99.17%(313992/316615) 99.35%(256449/258126)

Rate (CS)(>98%)

AMR RAB Assignment Success Suggested action plan:97.79%(294499/301169) 98.09%(241127/245815)

Rate(>98%) CE/IUB expansion

Video Call RAB Assignment98.31%(3314/3371) 98.67%(2891/2930) Perform regular neighbour list

Success Rate(>98%)check to further tune the

PS64 RAB Assignment Success performance84.93%(2462/2899) 83.10%(1981/2384)

Rate(>97%)

PS128 RAB Assignment98.48%(16674/16932) 98.80%(13638/13803)

Success Rate(>97%)

PS384 RAB Assignment97.53%(58114/59584) 97.81%(48854/49946)

Success Rate(>97%)




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Example of Throughput KPI issue analysis




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Example of Call drop rate issues

Drop Call Rate Voice(3G)Drop Call Rate Video(3G)AMR12.2 Call Drop Rate Drop Call Rate (2G)

3.5%

Voice call drop rate3.0%

2.5%changes over a three-

2.0% month optimization1.5% period1.0%

0.5%

0.0%

Zone1 Zone2Solving Voice call drop Zone3rate problems in Top 3

zones




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What measures were taken to solvethe call drop problems?

Zone Action time Call drop rate Optimization measures

reduction

Zone 1 Feb. 14-17 1.57%->1.27% Scrambling code planning

adjustment

System/handoverZone 2 Feb. 23-25 1.38%->1.21%parameter tuning

Neighbour list optimization

RF optimization, etc.Zone 3 Mar.2-6 1.34%->1.10%

HUAWEI TECHNOLOGIES CO., LTD.Page 33



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Example of Throughput issue analysis




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Analysis: coverage problems

RNC 123

RNC 122

Areas that lackdominant pilot

Drive test routeinvolves 3 HuaweiRNCs and 1 NortelRNC

RNC 121




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The impact of missing neighbours

DL R99 throughput has been impacted by the interference generated by missingneighbors, mostly concerning the new sites that had been recently put on air

Areas with low throughput corresponds to bad Ec/Io figures and HHO to 2G

Low throughput

UE handover to GSM




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Other causes

In addition to coverage and missing neighbour causes, the HSDPAminimum throughput problem is due to:

DT route crosses the IUR area where HSDPA calls are reconfigured to DCH(H2D)

UE moves from a non-hotspot to a hotspot site in HSDPA connected mode

RNC 122RNC 123 RNC 122

RNC 123

RNC 121 RNC 121




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Documents

HUAWEI 3G KPI