KPI in LTE Radio Networkhttp://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 • Call Drop Rate (VoIP/ALL) • Call Setup Complete Rate (VoIP/ALL) Mobility • HHO SR ( Intra/Inter Frequency) • HO in SR • Inter-RAT HHO SR Availability • Radio Network Unavailabil ity Rate Utilization • UL/DL RB Utility Rate Traffic • Cell UL/DL Traffic Volume • Radio Bearer Number Latency • Access Latency • Service Latency • Interrupt Latency Integrity • Service UL/DL Throughput Radio Network KPI : Focus on the radio network performance Service KPI : Focus on the user experience 4G LTE - RF Optimization Objects and Target Baseline | Page 2 mo-Data.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. mt-Access.RF Optimization Objects and Target Baseline | Page 3 . delayTolerantAccess-v1020. Causes except mo-Signalling are categorized as service related ones. 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. This KPI evaluates the RRC setup success rate with service related causes in a cell or cluster. highPriorityAccess. and the cause of mo-Signalling is categorized as signal related ones. mo-Signalling. The UE sets the establishmentCause and received by eNodeB. RRC _ SSRSignal RRC _ Connection Success Signal RRC _ Connection Attempt Signal 100% 4G LTE . Accessibility (2) – Counter Mapping for RRC SSR L.RRC.ConnReq.RF Optimization Objects and Target Baseline | Page 4 .Succ … 4G LTE .ConnReq.Att… L.RRC. Accessibility (3) – QCI Definition LTE-SAE QoS Class Identifier There are 9 QCIs defined in 3GPP TS 23.203.RF Optimization Objects and Target Baseline | Page 5 . Each of QCI has its QoS requirements. and each E-RAB will has the attribute of QCI. 4G LTE . 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 4G LTE .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.RF Optimization Objects and Target Baseline | Page 6 . 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 4G LTE . This KPI mainly includes three phases : RRC setup phase.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.RF Optimization Objects and Target Baseline | Page 8 . S1 Signaling connection establishment phase and service E-RAB setup phase: 4G LTE . 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) Call Setup Success Rate (ALL) RRC _ ConnectionSuccessService S1SIGConnectionEstablishSuccess ERAB _ SetupSuccess * * 100% RRC _ ConnectionAttemptService S1SIGConnectionEstablishAttempt ERAB _ SetupAttempt 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. RF Optimization Objects and Target Baseline | Page 9 .Accessibility (7) – Counter Mapping for CSSR 4G LTE . including the VoIP services. the E-RAB number of UE entering the un-synchronous state from synchronous state will be considered for the KPI calculating.User Inactivity.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. CDR( ALL) VoIP _ ERAB _ Re lease Call Drop Rate(Always Online) ERAB _ Abnormal Re lease 100% ERAB _ Re lease This KPI can be used to evaluate the call drop rate of all the services. In always online state. AlwaysOnline _ CDR ERABAbnormalReleaseOfAlwaysOnline 100% ERAB Re leaseOfAlwaysOnline 4G LTE . 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. UE Not Available For PS Service. VoIP _ CDR VoIP _ ERAB _ Abnormal Re lease 100% Call Drop Rate(ALL) This KPI can be used to evaluate the call drop rate of all services in a cell or a cluster.RF Optimization Objects and Target Baseline | Page 10 . including VoIP service. cs fallback triggered. when the always online state is active. Detach.or Inter-RAT redirection). and all of the other E-RAB releases are consider as normal E-RAB release. 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 4G LTE .RF Optimization Objects and Target Baseline | Page 11 . Retainability (3) .RF Optimization Objects and Target Baseline | Page 12 . this KPI will evaluate the success rate in totally for 4 phases: RRC setup phase. And it can include 4 phases: RRC setup phase. VoIP E-RAB setup phase and VoIP service E-RAB release phase. CSTR( AlwaysOnline) RRC _ ConnectionSuccessService S1SIGConnectionEstablishSuccess ERAB _ SetupSuccess ERABAbnormalReleaseOfAlwaysOnline * * * 100% RRC _ ConnectionAttemptService S1SIGConnectionEstablishAttempt ERAB _ SetupAttempt ERAB Re leaseOfAlwaysOnline 4G LTE . this KPI will evaluate the success rate in totally for 4 phases: RRC setup 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. which means the rate of the VoIP service can be normally terminated once user do the attempt to setup the service. 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. S1 Signaling connection establishment phase.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. S1 Signaling connection establishment phase. service E-RAB setup phase and service E-RAB release phase (when the always online state is active). S1 Signaling connection establishment phase. service E-RAB setup phase and service E-RAB release phase. RF Optimization Objects and Target Baseline | Page 13 .Retainability (4) .Counter Mapping for CSCR 4G LTE . 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. InterF _ HOOut _ SR InterF _ HOOutSuccess 100% InterF _ HOOutAttem pt 4G LTE . 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.RF Optimization Objects and Target Baseline | Page 14 . RF Optimization Objects and Target Baseline | Page 15 .Mobility (2) – Counter Mapping for Intra-LTE HO SR Handover Attempt Counters Handover Success Counters 4G LTE . 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.Mobility (3) .RF Optimization Objects and Target Baseline | Page 16 . HOIn _ SR HOInSuccess 100% HOInAttempt 4G LTE . Counter Mapping for Intra-LTE HO In SR HO in Attempt Counters HO in Success Counters 4G LTE .Mobility (4) .RF Optimization Objects and Target Baseline | Page 17 . 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.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.RF Optimization Objects and Target Baseline | Page 18 . 4G LTE . RF Optimization Objects and Target Baseline | Page 19 . IRATHO _ L2C _ SRout IRATHO _ L2C _ SuccessOut 100% IRATHO _ L2C _ AttemptOut 4G LTE .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. RF Optimization Objects and Target Baseline | Page 20 . HO Success 4G LTE . HO attempt. and distinguish the target system by an element “targetRAT-Type ” in the message C point.Mobility (7) – Counter Mapping for Inter-RAT HO SR B point .