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KPI in LTE Radio Network

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

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

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 …

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.

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

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

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:

4G LTE - RF Optimization Objects and Target Baseline | Page 9

Accessibility (7) – Counter Mapping for CSSR

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

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

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

4G LTE - RF Optimization Objects and Target Baseline | Page 13

Retainability (4) - Counter Mapping for CSCR

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

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

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

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

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.

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

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