3G & Beyond: What lies ahead for Performance Management? TTI Telecom © 2009Host:Frank CollettaSr. Manager, Solution EngineeringSpeaker:Yaacov BurakDirector, Solution Engineering

Agenda3G and Beyond – Key ConceptsOperational ChallengesInter Domain Performance CorrelationKey Performance Indicators for E-UTRANAudience Poll“When Things Go Wrong…” - Based on a True StoryRadio-to-IP Inter Domain CorrelationAssuring Mobility with Tracking Area LTE Multi-Service MonitoringQ & A2

3G & Beyond: Operational ChallengesA new era in information processing Massive data collection, intensive data processingRadio/IP Inter-Domain CorrelationDisassociation between radio / IP backhaul domains affect customer experience Maintain QoS in Packet Switching/ all-IP network Prioritize mixed services over shared bearer Recognized by 3GPP 'Key Performance Indicators (KPI) for E-UTRAN Definitions’3

Coping with Significantly High Data Volumes4Data CollectionData ProcessingAd-Hoc investigationDistributed collection architecture Early data processing (collection stage)Data prospecting Consider the relevancy of data prior to the collectionFlexible KPI/KQI Creation and modificationTime and hierarchal aggregation functions at this phase Auto-learning thresholdsAd-hoc reporting functionalities (BusineesObjects)Ad-hoc threshold definition

Distributed collection architecture

Early data processing (collection stage)

Data prospecting Consider the relevancy of data prior to the collection

Flexible KPI/KQI Creation and modification

Time and hierarchal aggregation functions at this phase

Auto-learning thresholds

Ad-hoc reporting functionalities (BusineesObjects)

Ad-hoc threshold definition

Inter-Domain Performance Correlation5UMTSDomainIT/ VASDomainGPRSDomainIP Core

LTE: Key Performance Indicators for E-UTRAN6AccessibilityIntegrityHandover Success RateHandover Failure RateTracking Area Configuration ScoreHanover InterruptionS1 Handover RateRRC Connection Establishment RateSAEB initial connection Establishment RateRetainabilityThroughputBlock ACK ratioBlock ERR ratioHARQ FailuresLatencyPacket LossJitterMOSMobilitySAEB Bearer ReleaseSAE Bearer modificationSAE Bearer activityAdded SAE Bearers AttemptsSAE Bearer numberAvailabilityInter/Intra Handover Success/Failure RateTracking Area Configuration ScoreHanover InterruptionS1 Handover RateCell AvailabilityNetwork AvailabilityService AvailabilityBridging the Gap Between RF Performance and End-User IP Services

Handover Success Rate

Handover Failure Rate

Tracking Area Configuration Score

Hanover Interruption

S1 Handover Rate

RRC Connection Establishment Rate

SAEB initial connection Establishment Rate

Throughput

Block ACK ratio

Block ERR ratio

HARQ Failures

Latency

Packet Loss

Jitter

MOS

SAEB Bearer Release

SAE Bearer modification

SAE Bearer activity

Added SAE Bearers Attempts

SAE Bearer number

Inter/Intra Handover Success/Failure Rate

Tracking Area Configuration Score

Hanover Interruption

S1 Handover Rate

Cell Availability

Network Availability

Service Availability

When Things Go Wrong…7 TTI Telecom © 2009

Dropped Calls, Spotty Service, Delayed Text…8 TTI Telecom © 2009The average iPhone owner can also use 10 times the network capacity used by the average smartphone user…The result is dropped calls, spotty service, delayed text and voice messages and glacial download speeds as … cellular network strains to meet the demand. Another result is outraged customers.

Inter-Domain Performance Correlation9UMTSDomainIT/ VASDomainRadius Authentication Failure RateGPRSDomainFailed PDP Context ActivationIP Core

Radio-to-IP Inter Domain Correlation10Radio-to-IP Correlation dramatically Reduce Mean-Time-To-IdentifyIP CoreUMTS Domain VAS Portal WWWRADIUSGnIu-psGiRNC

VAS

Portal

WWW

Integrated Thresholds Alarm Definition1101301100001101301.GGSN FAILED_PDP_ACTIVATION_PCT:%2ExceedExceedExceedExceedExceed2.GGSN FAILED_PDP_ACTIVATION_PCT:DaysAverage7GGSN ATTEMPT_PDP_ACT:30003.4.Radius AUTH_REQ_REJ_PCT:%1Radius AUTH_REJ_REQ:DaysAverage75.Advanced Alarm Condition:1 AND 2 AND 3 AND 4 AND 5Aggregated set of rules identify customer experience degradation

Getting on 3G During Peak Times…12 TTI Telecom © 2009“It’s almost worthless to try and get on 3G during peak times in those cities…When too many users get in the area, the call drops.” The problems seem particularly pronounced in New York and San Francisco, where (senior analyst) estimates …network shoulders as much as 20 percent of all the iPhone users in the United States.

Tracking Area Optimization13Small Tracking AreaLarge Tracking AreaeNBeNBeNB eNBMinimum paging, Many TA updatesMaximum paging, Few TA updatesNeed to find an optimum between these two extremes

What is Tracking Area Configuration Score?14E-RABaccessibilityUL/DL Signaling BitrateCustomer Traffic BitrateTracking Area Configuration ScoreTracking Area Configuration Score is Directly Associated with User Experience

LTE Tracking Area: Weekdays Configuration15AREA A

LTE Tracking Area: Weekend Configuration16AREA A1AREA A2

Tracking Area & Customer ExperienceTA design must be revised over time in order to adapt to changes and trends in user location and mobility patterns.17TA Conf’ Score KQI reflects QoE in a measureable wayActionable short term KQI vs.long term QoE optimizationPredefined usage scenarios for configuration changesSun Mon Tue Wed Thurs Fri SatTracking AreaReconfigurationTriggering

Analyzing Network-Wide Implications18

…. a 27-year-old systems administrator in San Francisco, checks his iPhone 10 to 15 times a day. But he is not making calls. He checks the scores of last night’s baseball game and updates his Twitter stream. He checks the local weather report …then he picks a restaurant on Yelp and maps the quickest way to get there. Or at least, he tries to.LTE Multi-Service Monitoring19 TTI Telecom © 2009

LTE Multi-Service Monitoring20“The success or failure of a call(/session) setup directly impacts the quality level for delivering the service by the networks, and also the feeling of the end user. So the success or failure of call(/session) setup needs be monitored.” (3GPP TS 32.425)

LTE QCI (QoS Class Identifier)21Keep Backward Compatibility with UMTS QoS(From 4 classes in UMTS/CDMA to 9 classes in LTE)

A1  A2 (per QCI) Accesability 22E-UTRANA1A2

Closing Notes23

Operating 3G/4G: Integrated Management ApproachNew approach to Performance data collection, processing and investigationIntegrative inter-domain process significantly shortens MTTINetwork configuration quality directly affects customers’ QoEPrioritizing traffic per service characteristics can no longer be over looked24

Questions and Answers25

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