04.LTE - KPI in LTE Radio Network

KPI in LTE Radio Network

http://www.linkedin.com/pub/ray-khastur/36/965/b7a

KPI System Overview LTE KPIs

Accessability • RRC SETUP SR • ERAB Setup SR (VoIP/ALL) • Call Setup SR (VoIP/ALL)

Retainability

Mobility

• Call Drop Rate (VoIP/ALL)

• HHO SR ( Intra/Inter Frequency)

• Call Setup Complete Rate (VoIP/ALL)

• HO in SR

Availability • Radio Network Unavailabil ity Rate

Utilization • UL/DL RB Utility Rate

• Inter-RAT HHO SR

Traffic • Cell UL/DL Traffic Volume • Radio Bearer Number

Latency • Access Latency • Service Latency

Integrity • Service UL/DL Throughput

• Interrupt Latency

Radio Network KPI :

Service KPI :

Focus on the radio network performance

Focus on the user experience 4G LTE - RF Optimization Objects and Target Baseline | Page 2

Accessibility (1) – RRC Setup Success Rate  RRC Setup Success Rate (service) The RRC setup procedure is trigged by different reasons as identified by the establishmentCause field in the RRCConnctionRequest message: emergency, highPriorityAccess, mt-Access, mo-Signalling, mo-Data, delayTolerantAccess-v1020. The UE sets the establishmentCause and received by eNodeB. Causes except mo-Signalling are categorized as service related ones, and the cause of mo-Signalling is categorized as signal related ones. This KPI evaluates the RRC setup success rate with service related causes in a cell or cluster. RRC _ SSRService 

RRC _ Connection Success service 100% RRC _ Connection Attempt service

 RRC Setup Success Rate (Signal) This KPI evaluates the RRC setup success rate with signal related causes (mo-Signalling) in a cell or cluster. RRC _ SSRSignal 

RRC _ Connection Success Signal RRC _ Connection Attempt Signal

100%

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Accessibility (2) – Counter Mapping for RRC SSR

L.RRC.ConnReq.Att…

L.RRC.ConnReq.Succ …

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Accessibility (3) – QCI Definition  LTE-SAE QoS Class Identifier There are 9 QCIs defined in 3GPP TS 23.203. Each of QCI has its QoS requirements, and each E-RAB will has the attribute of QCI.

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Accessibility (4) – ERAB Setup Success Rate VoIP ERAB Setup Success Rate This KPI can be used to evaluate the ERAB setup success rate of VoIP service (QCI 1 service) in a cell or cluster. VoIP _ ERAB _ SSR 

VoIP _ ERAB _ SetupSuccess 100% VoIP _ ERAB _ SetupAttempt

 ERAB Setup Success Rate (All) This KPI can be used to evaluate the ERAB setup success rate of all services including the VoIP service in a cell or a cluster. ERAB _ SSR( ALL) 

ERAB _ SetupSuccess 100% ERAB _ SetupAttempt

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Accessibility (5) – Counter Mapping for ERAB SSR

ERAB Setup Attempt Counters

ERAB Setup Success Counters

ERAB Setup Attempt Counters

ERAB Setup Success Counters

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Accessibility (6) – Call Setup Success Rate VoIP Call Setup Success Rate (VoIP CSSR) This KPI evaluates the success rate of the whole setup procedure for VoIP service (QCI 1 service) in a cell or cluster, which mainly includes three phases : RRC setup phase, S1 Signaling connection establishment phase and VoIP E-RAB setup phase: VoIP _ CSSR 

RRC _ ConnectionSuccessService S1SIGConnectionEstablishSuccess VoIP _ ERAB _ SetupSuccess * * 100% RRC _ ConnectionAttempt Service S1SIGConnectionEstablishAttempt VoIP _ ERAB _ SetupAttempt

CSSR( ALL) 

RRC _ ConnectionSuccessService S1SIGConnectionEstablishSuccess ERAB _ SetupSuccess * * 100% RRC _ ConnectionAttemptService S1SIGConnectionEstablishAttempt ERAB _ SetupAttempt

Call Setup Success Rate (ALL)

This KPI can be used to evaluate the call setup success rate of all services including the VoIP service in a cell or a cluster. This KPI mainly includes three phases : RRC setup phase, S1 Signaling connection establishment phase and service E-RAB setup phase:

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Accessibility (7) – Counter Mapping for CSSR

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Retainability (1) – Call Drop Rate VoIP Call Drop Rate This KPI can be used to evaluate the call drop rate of VoIP service (QCI 1 service) in a cell or cluster, the call drops happen when eNode initiate active ERAB (with data in buffer) release process by E-RAB Release Indication or UE Context Release Request message with Cause field with abnormal reasons (the cause other than : Normal Release, Detach,User Inactivity, cs fallback triggered, UE Not Available For PS Service,or Inter-RAT redirection), and all of the other E-RAB releases are consider as normal E-RAB release. VoIP _ CDR  VoIP _ ERAB _ Abnormal Re lease 100% VoIP _ ERAB _ Re lease

Call Drop Rate(ALL) This KPI can be used to evaluate the call drop rate of all services in a cell or a cluster, including VoIP service. CDR( ALL) 

ERAB _ Abnormal Re lease 100% ERAB _ Re lease

Call Drop Rate(Always Online)

This KPI can be used to evaluate the call drop rate of all the services, including the VoIP services, when the always online state is active. In always online state, the E-RAB number of UE entering the un-synchronous state from synchronous state will be considered for the KPI calculating. AlwaysOnline _ CDR 

ERABAbnormalReleaseOfAlwaysOnline 100% ERAB Re leaseOfAlwaysOnline

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Retainability (2) – Counter Mapping for Call Drop Rate

Normal and Abnormal release Counters based on the cause

Normal and Abnormal release Counters based on the cause

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Retainability (3) - Call Setup Complete Rate VoIP Call Setup Complete Rate (VoIP CSTR) This KPI evaluates the call Setup Complete Rate for VoIP service (QCI 1 service) in a cell or cluster, which means the rate of the VoIP service can be normally terminated once user do the attempt to setup the service. And it can include 4 phases: RRC setup phase, S1 Signaling connection establishment phase, VoIP E-RAB setup phase and VoIP service E-RAB release phase; VoIP _ CSTR 

RRC _ ConnectionSuccessService S1SIGConnectionEstablishSuccess VoIP _ ERAB _ SetupSuccess VoIP _ ERAB _ Normal Re lease * * * 100% RRC _ ConnectionAttemptService S1SIGConnectionEstablishAttempt VoIP _ ERAB _ SetupAttempt VoIP _ ERAB _ Re lease

Call Setup Complete Rate (ALL) The similar as upper KPI, this KPI will evaluate the success rate in totally for 4 phases: RRC setup phase, S1 Signaling connection establishment phase, service E-RAB setup phase and service E-RAB release phase; CSTR( ALL) 

RRC _ ConnectionSuccessService S1SIGConnectionEstablishSuccess ERAB _ SetupSuccess ERAB _ Normal Re lease * * * 100% RRC _ ConnectionAttemptService S1SIGConnectionEstablishAttempt ERAB _ SetupAttempt ERAB _ Re lease

Call Setup Complete Rate (Always Online) The similar as upper KPI, this KPI will evaluate the success rate in totally for 4 phases: RRC setup phase, S1 Signaling connection establishment phase, service E-RAB setup phase and service E-RAB release phase (when the always online state is active); CSTR( AlwaysOnline) 

RRC _ ConnectionSuccessService S1SIGConnectionEstablishSuccess ERAB _ SetupSuccess ERABAbnormalReleaseOfAlwaysOnline * * * 100% RRC _ ConnectionAttemptService S1SIGConnectionEstablishAttempt ERAB _ SetupAttempt ERAB Re leaseOfAlwaysOnline

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Retainability (4) - Counter Mapping for CSCR

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Mobility (1) – Intra-LTE Handover (Out) Success Rate Intra-frequency Handover Out Success Rate This KPI can be used to evaluate the intra-frequency handover out success rate in a cell or cluster. IntraF _ HOOut _ SR 

IntraF _ HOOutSuccess 100% IntraF _ HOOutAttem pt

Inter-frequency Handover Out Success Rate This KPI can be used to evaluate the inter-frequency handover out success rate in a cell or cluster. InterF _ HOOut _ SR 

InterF _ HOOutSuccess 100% InterF _ HOOutAttem pt

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Mobility (2) – Counter Mapping for Intra-LTE HO SR

Handover Attempt Counters

Handover Success Counters

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Mobility (3) - Intra-LTE Handover In Success Rate Handover In Success Rate This KPI can be used to evaluate the handover in success rate in a cell or cluster. HOIn _ SR 

HOInSuccess 100% HOInAttempt

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Mobility (4) - Counter Mapping for Intra-LTE HO In SR

HO in Attempt Counters

HO in Success Counters

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Mobility (5) – Inter-RAT Handover Success Rate Inter-RAT Handover Success Rate (LTE to WCDMA) This KPI can be used to evaluate the inter-RAT handover success rate from LTE to WCDMA in a cluster. IRATHO _ L2W _ SRout 

IRATHO _ L 2W _ SuccessOut 100% IRATHO _ L2W _ AttemptOut

IRATHO _ L2G _ SRout 

IRATHO _ L2G _ SuccessOut 100% IRATHO _ L2G _ AttemptOut

Inter-RAT Handover Success Rate (LTE to GERAN) This KPI can be used to evaluate the inter-RAT handover success rate from LTE to GERAN in a cluster.

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Mobility (6) – Inter-RAT Handover Success Rate Inter-RAT Handover Success Rate (LTE to CDMA2000) This KPI can be used to evaluate the inter-RAT handover success rate from LTE to CDMA2000 in a cluster. IRATHO _ L2C _ SRout 

IRATHO _ L2C _ SuccessOut 100% IRATHO _ L2C _ AttemptOut

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Mobility (7) – Counter Mapping for Inter-RAT HO SR

B point , HO attempt, and distinguish the target system by an element “targetRAT-Type ” in the message

C point, HO Success 4G LTE - RF Optimization Objects and Target Baseline | Page 20