Basic 3G Performance and Statistic Analysis

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By : Fajar Primadi A

Date : 6-Jan-2010


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genda

INTRODUCTION

ACCESSIBILITY ANALYSIS

RETAINABILITY ANALYSIS

INTEGRITY ANALYSIS


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ccessibility program

Acce

ssibilityAna

lysis

RAN Capacity utilization Analysis and monitoring

Transport and RNC Load Capacity utilization analysisand monitoring

Audit Node B HW and License Capacity

Consistency check RBS and RNC parameter

PeriodicEvaluation

Admission parameter adjustment


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RAN Capacity utilization Analysis andmonitoringOBJECTIVE

Monitor utilization of RAN capacity to prevent performances degradation due to

lack of resources.

Analyze capacity trend and network growing for upgrade proposal

CE UL and CE DL utilization

DL power utilization

DL code utilization

HS user utilization

Grace period of license monitoring.

Capacity monitored


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Transport and RNC Load Capacityutilization analysis and monitoringOBJECTIVE

Monitor utilization of transport capacity to prevent performances degradation

due to lack of resources.

Analyze capacity trend and network growing for upgrade proposal

Iub (Node to RXI) Utilization

Iub (RXI to RNC) Utilization

Cid Utilization

IuCS Utilization

IuPS Utilization

Iur Utilization

RNC Mpload

Capacity monitored


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Audit Node B HW and License CapacityOBJECTIVE

Audit actual RBS configuration

Audit and consistency check RBS parameter

Monitor actual RBS HW capacity and license capacity

HW Capacity : RAXB, TXB, RU, E1

License Key Capacity

RBSLocalCell Parameter

NodeBFunction Parameter

RBS Product type

GraceTimePeriod

AAL2 Configuration

IMA Configuration

E1

IubDataStream

AntennaRef

Capacity monitored


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RBS Parameter dumpOBJECTIVE

Utilize of available resources in RBS

Utilize of available license in RBS

Consistency of RBS parameter and RNC parameter

maxDlPowerCapability

maxNumHsPdschCodes

maxNumHsdpaUsers

supportOf16qam

maxHsRate

electricalUlDelay, ulAttenuation

electricalDlDelay, dlAttenuation

Capacity monitored


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Admission parameter adjustmentOBJECTIVE

Optimize of available resources by admission parameter adjustment

dlCodeAdm

hsdpaUsersAdm

pwrAdm

sf16Adm

sf16AdmUl

sf4AdmUl

sf8Adm

sf8AdmUl

numHsPdschCodes

maximumTransmissionPower

Capacity monitored


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ccessibility Study Case

Below is HSDPA accessibility success rate of PBR037W3

HSDPAAccSR

Degraded ?


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ccessibility Study Case cont

Counter to be checked:

1. pmNoFailedRabEstAttemptExceedConnLimit

2. pmNoFailedRabEstAttemptLackDlChnlCode

3. pmNoFailedRabEstAttemptLackDlPwr

Number of failed PS RAB establishment attempts due to exceeding the configured

connection limit when allocating Spreading Factor

Number of failed RAB establishment attempts due to lack of DL channelization codes

Number of failed RAB establishment attempts due to lack of DL power. Counter is steppedwhen admission control fails with reject reason lack of DL power

Parameter related: e.g sf16admUl, sf8admUl

Parameter related: dlCodeAdm

Parameter related: pwrAdm


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ccessibility Study Case COnt

Action: Create NCCR for changing dlCodeAdm &

pwrAdm parameter

NCCR #279

Lack of DL Code

& DL Power


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For most of the drop causes related to RF conditions issues, the speech RAB is

considered as a reference, hence some counters for speech drop call causeshave been defined in order to spot possible radio conditions problems. Followingthe RAB speech drop causes are described:

.

Retainability

1. Drop speech due to soft handover actionsIt is dropped Speech calls due to Soft Handover action, which are network initiated call releases dueto inability to include a non-valid or valid cell in the active set. This means that missing neighbourdrops due to releaseConnOffset exceeding are included. In general every cause that does not allowexecuting a SHO is triggering the counter at numerator

Counter related : pmNoSysRelSpeechSoHo

2. Drop speech due to missing neighbor

It is dropped Speech call due to unknown measured cell (missing neighbor relation).

Counter related : pmNoSysRelSpeechNeighbr


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Retainability

3. Drop speech due to UL Synchronization lostIt is dropped Speech call due to UL Synchronization Lost. It has to be noted that the counter at

numerator is only pegged as a UL synch drop if dchRcLostT (default 5s) expires.

Counter related : pmNoSysRelSpeechUlSynch


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Retainability Study Case

Mostly below KPI

threshold (< 99%)?

Below is CCSR Voice for PAD012W1


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Retainability Study Case cont

Action: check and add some missing neighbor

NCCR #346

High count in pmNoSysRelSpeechSoHo&

pmNoSysRelSpeechNeighbr


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Integrity

Integrity consist of Soft Handover (SHO) and IRAT Handoverperformance:

1. SHO SR:100 * (1 - pmNoTimesCellFailAddToActSet / (pmNoTimesCellFailAddToActSet + pmNoTimesRlAddToActSet)

pmNoTimesCellFailAddToActSet

Number of times a cell fails to be added to an active set

pmNoTimesRlAddToActSet

Number of times an RL is added to an active set


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Integrity

2. IRAT HO SR:100 * (pmNoSuccessOutIratHoSpeech / (pmNoAttOutIratHoSpeech)

pmNoSuccessOutIratHoSpeech

Number of successful outgoing (to GSM) inter-RAT handover forConversationalspeech RAB for the best cell in the active set

pmNoAttOutIratHoSpeech

Number of attempted outgoing (to GSM) inter-RAT handover for Conversationalspeech RAB for the best cell in the active set.


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integrity Study Case

Below is SHO performance of RNPAD02.There was SHO degradation on 24 and 25 Nov 09


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integrity Study Case cont cont

The worst cell are: BKT091WA, BKT091WB and BKT091WC

Check worst cell list:Date/Time Region Cluster Utran_Cell SHOSR mNoTimesCellFailAddToActSe mNoTimesRlAddToActSet24-Nov-09 Sumbagteng Bukittinggi BKT091W2 0 28247 0

24-Nov-09 Sumbagteng Bukittinggi BKT091W3 0.001894406 158358 3






24-Nov-09 Sumbagteng Bukittinggi BKT023W1 100 0 6583


24-Nov-09 Sumbagteng Bukittinggi BKT023W3 100 0 34224-Nov-09 Sumbagteng Bukittinggi BKT024W1 100 0 9975








24-Nov-09 Sumbagteng Bukittinggi PAY250W1 100 0 2

24-Nov-09 Sumbagteng Bukittinggi PAY250W2 100 0 61


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integrity Study Case cont cont

RNC SITE ID CFRPHEM1 CFRPHEM2 CFRPHEM3 ICDS TN

RNPAD02 BKT091W 10001 10001 10001 1110 A

Check site status from RNC:

Check alarm in BKT091W:

Conclusion: SHO was degraded due to transmission problem


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Documents

Basic 3G Performance and Statistic Analysis