04. lte kpi in lte radio network
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1) The document describes key performance indicators (KPIs) for measuring the performance of an LTE radio network. It discusses KPIs related to accessibility, retainability, mobility, and latency. 2) Accessibility KPIs measure aspects like call setup success rate, RRC setup success rate, and E-RAB setup success rate. Retainability KPIs measure call drop rate and call setup completion rate. Mobility KPIs measure handover success rates within LTE and between LTE and other technologies. 3) For each KPI, the document provides a definition, calculation formula, and description of which network events and counters are needed to measure the KPI. Baseline
04. lte kpi in lte radio network
- 2. 4G LTE - RF Optimization Objects and Target Baseline | Page 2 KPI System Overview LTE KPIs Accessability Retainability IntegrityMobility Latency • RRC SETUP SR • ERAB Setup SR (VoIP/ALL) • Call Setup SR (VoIP/ALL) • Call Drop Rate (VoIP/ALL) • Call Setup Complete Rate (VoIP/ALL) • Service UL/DL Throughput • HHO SR ( Intra/Inter Frequency) • HO in SR • Inter-RAT HHO SR • Access Latency • Service Latency • Interrupt Latency • Radio Network Unavailabil ity Rate Availability • Cell UL/DL Traffic Volume • Radio Bearer Number Utilization Radio Network KPI : Focus on the radio network performance Service KPI : Focus on the user experience • UL/DL RB Utility Rate Traffic
- 3. 4G LTE - RF Optimization Objects and Target Baseline | Page 3 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. %100 _ _ _ Service service service AttemptConnectionRRC SuccessConnectionRRC SSRRRC RRC Setup Success Rate (Signal) This KPI evaluates the RRC setup success rate with signal related causes (mo-Signalling) in a cell or cluster. %100 _ _ _ Signal Signal Signal AttemptConnectionRRC SuccessConnectionRRC SSRRRC
- 4. 4G LTE - RF Optimization Objects and Target Baseline | Page 4 Accessibility (2) – Counter Mapping for RRC SSR L.RRC.ConnReq.Att… L.RRC.ConnReq.Succ …
- 5. 4G LTE - RF Optimization Objects and Target Baseline | Page 5 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.
- 6. 4G LTE - RF Optimization Objects and Target Baseline | Page 6 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. _ _ _ _ 100% _ _ VoIP ERAB SetupSuccess VoIP ERAB SSR 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. _ _ ( ) 100% _ ERAB SetupSuccess ERAB SSR ALL ERAB SetupAttempt
- 7. 4G LTE - RF Optimization Objects and Target Baseline | Page 7 Accessibility (5) – Counter Mapping for ERAB SSR ERAB Setup Attempt Counters ERAB Setup Success Counters ERAB Setup Attempt Counters ERAB Setup Success Counters
- 8. 4G LTE - RF Optimization Objects and Target Baseline | Page 8 Accessibility (6) – Call Setup Success Rate _ 1 _ ( ) * * 100% _ 1 _ Service Service RRC ConnectionSuccess S SIGConnectionEstablishSuccess ERAB SetupSuccess CSSR ALL RRC ConnectionAttempt S SIGConnectionEstablishAttempt ERAB SetupAttempt 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: _ 1 _ _ _ * * 100% _ 1 _ _ Service Service RRC ConnectionSuccess S SIGConnectionEstablishSuccess VoIP ERAB SetupSuccess VoIP CSSR RRC ConnectionAttempt S SIGConnectionEstablishAttempt VoIP 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:
- 9. 4G LTE - RF Optimization Objects and Target Baseline | Page 9 Accessibility (7) – Counter Mapping for CSSR
- 10. 4G LTE - RF Optimization Objects and Target Baseline | Page 10 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. 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. %100 Re__ Re__ _ leaseERABVoIP leaseAbnormalERABVoIP CDRVoIP _ Re ( ) 100% _ Re ERAB Abnormal lease CDR ALL ERAB 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. _ 100% Re ERABAbnormalReleaseOfAlwaysOnline AlwaysOnline CDR ERAB leaseOfAlwaysOnline
- 11. 4G LTE - RF Optimization Objects and Target Baseline | Page 11 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
- 12. 4G LTE - RF Optimization Objects and Target Baseline | Page 12 Retainability (3) - Call Setup Complete Rate _ 1 _ _ Re ( ) * * * 100% _ 1 _ _ Re Service Service RRC ConnectionSuccess S SIGConnectionEstablishSuccess ERAB SetupSuccess ERAB Normal lease CSTR ALL RRC ConnectionAttempt S SIGConnectionEstablishAttempt ERAB SetupAttempt ERAB lease _ 1 _ _ _ _ Re _ * * * _ 1 _ _ Service Service RRC ConnectionSuccess S SIGConnectionEstablishSuccess VoIP ERAB SetupSuccess VoIP ERAB Normal lease VoIP CSTR RRC ConnectionAttempt S SIGConnectionEstablishAttempt VoIP ERAB SetupAttempt Vo 100% _ _ ReIP ERAB lease 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; 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; 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); _ 1 _ ( ) * * * _ 1 _ Service Service RRC ConnectionSuccess S SIGConnectionEstablishSuccess ERAB SetupSuccess ERABAbnormalReleaseOfAlway CSTR AlwaysOnline RRC ConnectionAttempt S SIGConnectionEstablishAttempt ERAB SetupAttempt 100% Re sOnline ERAB leaseOfAlwaysOnline
- 13. 4G LTE - RF Optimization Objects and Target Baseline | Page 13 Retainability (4) - Counter Mapping for CSCR
- 14. 4G LTE - RF Optimization Objects and Target Baseline | Page 14 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. %100 _ _ __ ptHOOutAttemIntraF ssHOOutSucceIntraF SRHOOutIntraF 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. %100 _ _ __ ptHOOutAttemInterF ssHOOutSucceInterF SRHOOutInterF
- 15. 4G LTE - RF Optimization Objects and Target Baseline | Page 15 Mobility (2) – Counter Mapping for Intra-LTE HO SR Handover Attempt Counters Handover Success Counters
- 16. 4G LTE - RF Optimization Objects and Target Baseline | Page 16 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. %100_ tHOInAttemp sHOInSucces SRHOIn
- 17. 4G LTE - RF Optimization Objects and Target Baseline | Page 17 Mobility (4) - Counter Mapping for Intra-LTE HO In SR HO in Attempt Counters HO in Success Counters
- 18. 4G LTE - RF Optimization Objects and Target Baseline | Page 18 Mobility (5) – Inter-RAT Handover Success Rate %100 _2_ _2_ _2_ AttemptOutGLIRATHO SuccessOutGLIRATHO SRGLIRATHO out 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. %100 _2_ _2_ _2_ AttemptOutWLIRATHO SuccessOutWLIRATHO SRWLIRATHO out 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.
- 19. 4G LTE - RF Optimization Objects and Target Baseline | Page 19 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. _ 2 _ _ 2 _ 100% _ 2 _ out IRATHO L C SuccessOut IRATHO L C SR IRATHO L C AttemptOut
- 20. 4G LTE - RF Optimization Objects and Target Baseline | Page 20 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