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WCDMA UTRAN KPI

IntroductionIntroduction

KPI definitionKey performance indicator

KPI entityRNC level

Cell level

Clutter/region level (customized)

KPI analysis Network performance surveillance

Trouble shooting network problems

Network trend analysis

UTRAN KPI OverviewUTRAN KPI Overview

The UTRAN KPI can be divided into 5 catalogsAccessibility：UTRAN Call Setup

Retainability：UTRAN Call Drop

Mobility：UTRAN Mobility Management

Traffic：Resource and Traffic management

Algorithm： Radio Resource Management Algorithm Management

KPI

Accessibility Retainability Mobility Traffic Algorithm

ContentsContents

UTRAN Call Setup

UTRAN Call Drop

UTRAN Mobility Management

Traffic Management

Algorithm Management

UTRAN Call Setup UTRAN Call Setup

UTRAN Call Setup includes the RRC connection setup and the RAB

establish procedure. The Successful call setup involves the success

RRC and RAB setup. The main indicators are

RRC Setup Success Rate

RAB Setup Success Rate

RRC Setup CounterRRC Setup Counter

Measurement PointStat. Number of RRC Connection Request in Point A1 of Figure1

Stat. Number of RRC Connection Setup in Point B of Figure1

Stat. Number of RRC Connection Setup complete in Point C of Figure1

Stat. Number of RRC Connection Reject in point A of Figure2

A1

B

A2

C

RRC CONNECTION REQUEST

RRC CONNECTION SETUP COMPLETE

RRC CONNECTION SETUP

UE RNC

A

RRC CONNECTION REQUEST

RRC CONNECTION REJECT

UE RNC

F1:successful RRC connection setup procedure F2: RRC connection reject procedure


RRC Setup KPI

RRC Connection Setup Success Rate = RRC Connection Setup complete / RRC

Connection Request

Main counter

RRC Connection Request

RRC Connection Setup

RRC Connection Reject

RRC Connection Setup complete


Request cause counter

Originating conversational call

Terminating conversational call

Inter-RAT cell re-selection

Inter-RAT cell change order

Registration

……

Failure cause counter

RRC Reject

RRC setup no response

RAB Setup CounterRAB Setup Counter

Measurement Point

Stat. Number of RAB Setup Request in Point A of Figure1

Stat. Number of RAB Setup Success in Point B of Figure1

Stat. Number of RAB Setup Failure in Point B of Figure2

RAB ASSIGNMENTREQUEST

UE RNC CN

A

B

RADIO BEARERSETUP

RADIO BEARERSETUP COMPLETE

RAB ASSIGNMENTRESPONSE

RAB ASSIGNMENTREQUEST

UE RNC CN

A

B

RADIO BEARERSETUP

RADIO BEARERSETUP FAILURE

RAB ASSIGNMENTRESPONSE

F1: Successful RAB setup procedure F2: RAB setup failure procedure

RAB Setup CounterRAB Setup CounterRAB Setup KPI

CS RAB Success rate = CS RAB Setup Success/CS RAB Setup Request

PS RAB Success rate = PS RAB Setup Success/CS RAB Setup Request

Overall counter

CS RAB Setup Request

CS RAB Setup Success

CS RAB Setup Failure

PS RAB Setup Request

PS RAB Setup Success

PS RAB Setup Failure

Traffic class based counter

Conversational

Streaming

Interactive

Background

RAB setup counterRAB setup counter

Typical bearer based counterAMR speech

CS64kbps

PS64kbps

PS128kbps

PS384kbps

Failure cause counterInvalid parameters

Unavailable

Transport Layer failure

Other cause

ContentsContents

UTRAN Call Setup

UTRAN Call Drop


Traffic Management


Call Drop CounterCall Drop Counter

Measurement Point

Stat. Number of Call Drop in Point A of Figure1 and in Point A of Figure2

Definition of Call Drop : Abnormal RAB release triggered by RNC

A

RNC CN

RAB RELEASE REQUEST

F1: RAB release request procedure F2: Iu connection release request procedure

A

IU RELEASE COMMAND

IU RELEASE COMPLETE

RNC CN

IU RELEASE REQUEST


Call Drop KPI

AMR Call Drop Rate = AMR Call Drop / AMR RAB Setup Success

VP Call Drop Rate = VP Call Drop / VP RAB Setup Success

PS Call Drop Rate = PS Call Drop / PS RAB Setup Success

Overall counter

CS call drop

PS call drop


Conversational

Streaming

Interactive

Background


Typical bearer based counter

AMR speech

CS64kbps

PS64Kbps

PS128Kbps

PS384Kbps

Call drop cause counter

RF loss

RLC reset

AAL2 failure

GTPU loss

Other cause

ContentsContents

UTRAN Call Setup

UTRAN Call Drop


Traffic Management


UTRAN Mobile Management UTRAN Mobile Management

The UTRAN Mobile Management focus on the KPIs of the handover procedures.

Soft handover

Hard handover

InterRAT handover

InterRAT cell change order

Cell update

SHO counterSHO counter

Measurement PointStat. Number of SHO request in Point B of Figure1

Stat. Number of SHO success in Point C of Figure1

Stat. Number of SHO failure in Point C of Figure2 and in Point C of Figure3

C

ACTIVE SET UPDATE

ACTIVE SET UPDATE COMPLETE

UE RNC

A

B

MEASUREMENT REPORT

F1: Successful SHO procedure F2: SHO failure procedure (activeset update failure) F3:SHO failure procedure (time out)

C

ACTIVE SET UPDATE

ACTIVE SET UPDATE FAILURE

UE RNC

A

B

MEASUREMENT REPORT

C

ACTIVE SET UPDATE

WAITING ACTIVE SET UPDATE COMPLETE TIME OUT

UE RNC

A

B

MEASUREMENT REPORT


Soft handover KPI

Soft HO Success rate=Soft HO success / Soft HO request

Softer HO Success rate=Softer HO success / Softer HO request

Overall counter

Soft HO request

Soft HO success

Softer HO request

Softer HO success

Typical Service based counter

AMR speech

CS64kbps

PS64kbps

PS128kbps

PS384kbps



configuration unsupported

incompatible simultaneous reconfiguration

invalid configuration

No response

Other cause

SHO factor counter

(1 radio link, 2 radio links, 3 radio links) active set

SHO factor (based on radio link) = active set average link number -1

SHO factor (based on UE) = (2 radio links active set + 3 radio links active set) / (1

radio links active set + 2 radio links active set + 3 radio links active set)

HHO counterHHO counter

Measurement PointStat. Number of HHO request in Point B of Figure1

Stat. Number of HHO success in Point C of Figure1

Stat. Number of HHO failure in Point A of Figure2 and in Point A of Figure3

RADIO LINK SETUPREQUEST

UE NodeB RNC

RADIO LINK SETUPRESPONSE

A

B

PHYSICAL CHANNEL RECONFIGURATION

PHYSICAL CHANNELRECONFIGURATION COMPLETE

C

MEASUREMENT REPORT

F1: Successful HHO procedure F2: HHO failure (physical channel configuration failure) F3:HHO failure (time out)

UE RNC

A

PHYSICAL CHANNELRECONFIGURATION

PHYSICAL CHANNELRECONFIGURATION FAILURE

UE RNC

A

PHYSICAL CHANNELRECONFIGURATION

WAITING PHYSICAL CHANNELRECONFIGURATION TIME OUT


HHO KPI

Intra-frequency HHO Success rate = Intra-frequency HHO success / Intra-

frequency HHO request

Inter-frequency HHO Success rate = Inter-frequency HHO success / Inter-

frequency HHO request

Overall counter

Intra-frequency HHO request

Intra-frequency HHO success

Intra-frequency HHO failure

Inter-frequency HHO request

Inter-frequency HHO success

Inter-frequency HHO failure


Typical Service based counter

AMR speech

CS64kbps

PS64kbps

PS128kbps

PS384kbps


Configuration unsupported

Physical channel failure

Incompatible simultaneous reconfiguration

Cell update occurred

Invalid configuration

No response

Other cause

Inter-RAT Handover out counterInter-RAT Handover out counter

Measurement PointStat. Number of Handover outgoing prepare in Point A

Stat. Number of Handover outgoing prepare success in Point B

Stat. Number of Handover outgoing attempt in Point C

Stat. Number of Handover outgoing success in Point D

RELOCATIONREQUIRED

UE SRNC CN

HANDOVER FROMUTRAN COMMAND

RELOCATIONCOMMAND

IU RELEASECOMMAND

A

B

C

D

F1: Successful inter-RAT HO outgoing procedure

Inter-RAT handover out counterInter-RAT handover out counter

Inter-RAT handover KPI

Inter-RAT handover out prepare success rate = Handover outgoing prepare

success/Handover outgoing prepare

Handover outgoing success rate = Handover outgoing success/Handover

outgoing attempt

Overall counter

Handover outgoing prepare

Handover outgoing prepare success

Handover outgoing attempt

Handover outgoing success

Inter-RAT handover out counterInter-RAT handover out counter


Prepare failure

Relocation Failure in Target CN/RNC or Target System

TRELOCalloc Expiry

Relocation not supported in Target RNC or Target system

No Resource Available

Unknown Target RNC

No response

……

Handover failure

Configuration Unsupported

Physical Channel Failure

Unspecified

Relocation abort

No response

Other cause

Inter-RAT handover in counterInter-RAT handover in counter

Measurement Point

Stat. Number of Handover incoming request in Point A

Stat. Number of Handover incoming prepare success in Point B

Stat. Number of Handover incoming success in Point C

F1: Successful inter-RAT HO incoming procedure

RELOCATIONREQUEST

CN TRNC

A

HANDOVER TOUTRAN COMPLETE

RELOCATIONREQUEST

ACKNOWLEDGE

B

CRELOCATIONCOMPLETE

D

NodeB UE

RADIO LINKRESTORE

INDICATION


Inter-RAT handover in KPI

Handover in prepare success rate = Handover incoming prepare

success/Handover incoming request

Handover in success rate = Handover incoming success/Handover incoming

request

Overall counter

Handover incoming request

Handover incoming prepare success

Handover incoming success


Failure cause

Prepare failure

No Resource Available

Relocation Failure in Target CN/RNC or Target System

Relocation not supported in Target RNC or Target system

Relocation abort

Other cause

Handover failure

Relocation abort

No response

Other cause

Inter-RAT cell change counterInter-RAT cell change counter

Measurement Point

Stat. Number of cell change outgoing request in Point B of Figure1 and Point A

of Figure2

Stat. Number of cell change outgoing success in Point D of Figure1 and Point B

of Figure2UE SRNC CN

CELL CHANGEORDER FROM

UTRAN

IU RELEASECOMMAND

A

B

C

MEASUREMENTREPORT

IU RELEASECOMPLETE

D

F1: UTRAN-controlled cell change outgoing procedure F2: UE-controlled cell change outgoing procedure

A SRNS CONTEXT RESPONS

SRNS CONTEXT REQUESTSRNC CN

IU RELEASE COMMAND

IU RELEASE COMPLETEB

Inter-RAT cell change counterInter-RAT cell change counter

Inter-RAT cell change KPI

Success rate = Cell change success / Cell change outgoing request

Overall counter

Cell change outgoing request

Cell change outgoing success

Typical bearer based counter

PS64kbps

PS128kbps

PS384kbps


Configuration unacceptable

Physical Channel Failure

Unspecified

No response

Other

Cell update counterCell update counter

Measurement Point

Stat. Number of cell update request in Point A

Stat. Number of cell update success in Point B in case1 or case2

Stat. Number of cell update success in Point C in case3

Case1:the UE camps on the same cells and keeps in CELL_PCH state before and after cell update

Case2:the UE camps on the same cells and keeps in CELL_FACH state before and after cell update,

also the update cause is not cell reselection

Case3: all cases except case1 and case2

B

CELL UPDATE

CELL UPDATE CONFIRM

UE RNC

PHYSICAL CHANNEL RECONFIGURATIO

C

A

F1: cell update procedure

Cell update counterCell update counter

Cell update KPI

Cell update success rate = Cell update success/Cell update request

Overall Counter

Cell update request

Cell update success

Cell update cause counter

Cell reselection

Periodical cell update

Uplink data transmission

Paging response

Re-entered service area

Radio link failure

RLC unrecoverable error

ContentsContents

UTRAN Call Setup

UTRAN Call Drop


Traffic Management


Traffic CounterTraffic Counter

User number

RRC state based user number

Cell DCH, Cell FACH, Cell PCH, URA PCH

Traffic class based equivalent user

Conversational

Streaming

Interactive and background

Cell throughput

Directional counter

Cell uplink throughput

Cell downlink throughput


Conversational, streaming, interactive, background

All supported bandwidth

Traffic CounterTraffic Counter

Iub bandwidth utilization

Common channel (RACH, FACH, PCH) volume

Traffic class based service volume

Uplink and downlink volume

OVSF code utilization

SF based

SF=4

SF=8

……

SF=512

RTWP and Carrier Power

Cell RTWP

Transmission Carrier Power

ContentsContents

UTRAN Call Setup

UTRAN Call Drop


Traffic Management


Algorithm CounterAlgorithm Counter

DCCC

Overall counter

Channel switch request

Channel switch success

DCH<->DCH channel switch counter

Channel switch success (DL Bit Rate upgrade )

Channel switch success (DL Bit Rate degrade )

DCH<->FACH/RACH channel switch counter

Channel switch success (To common channel)

Channel switch success (From common channel)

AMRC

Uplink AMR control counter (degrade)

Downlink AMR control counter (upgrade)

CAC

UL Admission deny counter

DL Admission deny counter

Appendix: Nastar KPI Analysis RoutineAppendix: Nastar KPI Analysis Routine

Define monitor area: RNC group or cell group

Query Performance Item

Query Top N cell list

Query related item

Import raw data

Define cluster

Select Issue

Find out trouble cause

Raw counter Analysis

Select performance analysis issue

Query metric item, find the fault or trouble

Query TopN cell list in pre-defined cluster, find the worst cell or cell group

Query related metric item in the specified worst cells

Query and find out the fault or trouble cause

Analyze raw counter if necessary

Import performance counter from NE M2000

Step1: Check RRC metric item by “RRC setup analysis” issue

RRC Setup Rate islower

Appendix: Nastar KPI Analysis Example

Step2: Find the worst TopN cell list in former cluster by “Forward”


Step3: Find the worst cell in TopN list


Step4: Query RRC reject cause in specified cell by “Forward”


Step5: Find the RRC reject cause in the worst cell


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