04.LTE - KPI in LTE Radio Network
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Transcript of 04.LTE - KPI in LTE Radio Network
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http://www.linkedin.com/pub/ray-khastur/36/965/b7a
KPI in LTE Radio Network
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4G LTE - RF Optimization Objects and Target Baseline | Page 2
KPI System Overview
LTE KPIs
Accessability Retainability Integrity Mobility 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
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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
SuccessConnectionRRCSSRRRC
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
SuccessConnectionRRCSSRRRC
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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
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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.
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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 SetupSuccessVoIP 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 SetupSuccessERAB SSR ALL
ERAB SetupAttempt
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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
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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 SetupSuccessCSSR 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 SetupSuccessVoIP 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:
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4G LTE - RF Optimization Objects and Target Baseline | Page 9
Accessibility (7) Counter Mapping for CSSR
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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.
%100Re__
Re___
leaseERABVoIP
leaseAbnormalERABVoIPCDRVoIP
_ Re( ) 100%
_Re
ERAB Abnormal leaseCDR 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
ERABAbnormalReleaseOfAlwaysOnlineAlwaysOnline CDR
ERAB leaseOfAlwaysOnline
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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
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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 leaseCSTR ALL
RRC ConnectionAttempt S SIGConnectionEstablishAttempt ERAB SetupAttempt ERAB lease
_ 1 _ _ _ _ Re_ * * *
_ 1 _ _
Service
Service
RRC ConnectionSuccess S SIGConnectionEstablishSuccess VoIP ERAB SetupSuccess VoIP ERAB Normal leaseVoIP 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 ERABAbnormalReleaseOfAlwayCSTR AlwaysOnline
RRC ConnectionAttempt S SIGConnectionEstablishAttempt ERAB SetupAttempt 100%
Re
sOnline
ERAB leaseOfAlwaysOnline
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4G LTE - RF Optimization Objects and Target Baseline | Page 13
Retainability (4) - Counter Mapping for CSCR
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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
ssHOOutSucceIntraFSRHOOutIntraF
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
ssHOOutSucceInterFSRHOOutInterF
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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
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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
sHOInSuccesSRHOIn
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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
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4G LTE - RF Optimization Objects and Target Baseline | Page 18
Mobility (5) Inter-RAT Handover Success Rate
%100_2_
_2__2_
AttemptOutGLIRATHO
SuccessOutGLIRATHOSRGLIRATHO 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
SuccessOutWLIRATHOSRWLIRATHO 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.
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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 SuccessOutIRATHO L C SR
IRATHO L C AttemptOut
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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