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WCDMA UTRAN KPI

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IntroductionIntroduction

z KPI definit ion

Key performance indicator

z KPI enti ty

RNC level Cell level

Clutter/region level (customized)

z KPI analysis

Network performance surveillance

Trouble shooting network problems

Network trend analysis

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UTRAN KPI OverviewUTRAN KPI Overview

z The UTRAN KPI can be divided into 5 catalogs

AccessibilityUTRAN Call Setup

RetainabilityUTRAN Call Drop

MobilityUTRAN Mobility Management

TrafficResource and Traffic management

Algorithm Radio Resource Management Algorithm Management

KPI

Accessib il ity Retainability Mobility Traffic Algori thm

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ContentsContents

UTRAN Call Setup

UTRAN Call Drop

UTRAN Mobil ity Management

Traffic Management

Algorithm Management

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UTRAN Call SetupUTRAN Call Setup

z 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

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RRC Setup CounterRRC Setup Counter

z Measurement Point

Stat. 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 CONNECTIONREQUEST

RRC CONNECTIONSETUP COMPLETE

RRC CONNECTIONSETUP

UE RNC

A

RRC CONNECTION REQUEST

RRC CONNECTIONREJECT

UE RNC

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

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RRC Setup CounterRRC Setup Counter

z RRC Setup KPI

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

Connection Request

z Main counter RRC Connection Request

RRC Connection Setup

RRC Connection Reject

RRC Connection Setup complete

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RRC Setup CounterRRC Setup Counter

z Request cause counter

Originating conversational call

Terminating conversational call

Inter-RAT cell re-selection Inter-RAT cell change order

Registration

z Failure cause counter

RRC Reject

RRC setup no response

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RAB Setup CounterRAB Setup Counter

z 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 ASSIGNMENT

REQUEST

UE RNC CN

A

B

RADIO BEARERSETUP

RADIO BEARER

SETUP COMPLETE

RAB ASSIGNMENTRESPONSE

RAB ASSIGNMENT

REQUEST

UE RNC CN

A

B

RADIO BEARERSETUP

RADIO BEARERSETUP FAILURE

RAB ASSIGNMENT

RESPONSE

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

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RAB Setup CounterRAB Setup Counter

z

RAB 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

z 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

z Traffic class based counter

Conversational

Streaming

Interactive

Background

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RAB setup counterRAB setup counter

z Typical bearer based counter

AMR speech

CS64kbps

PS64kbps

PS128kbps

PS384kbps

z Failure cause counter

Invalid parameters

Unavailable

Transport Layer failure

Other cause

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ContentsContents

UTRAN Call Setup

UTRAN Call Drop

UTRAN Mobil ity Management

Traffic Management

Algorithm Management

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Call Drop CounterCall Drop Counter

z 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 REQUES

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

A

IURELEASE COMMAND

IU RELEASE COMPLETE

RNC CN

IU RELEASE REQUEST

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Call Drop CounterCall Drop Counter

z 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

z Overall counter

CS call drop

PS call drop

z Traffic class based counter

Conversational

Streaming

Interactive

Background

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Call Drop CounterCall Drop Counter

z Typical bearer based counter

AMR speech

CS64kbps

PS64Kbps PS128Kbps

PS384Kbps

z Call drop cause counter

RF loss

RLC reset

AAL2 failure

GTPU loss

Other cause

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ContentsContents

UTRAN Call Setup

UTRAN Call Drop

UTRAN Mobil ity Management

Traffic Management

Algorithm Management

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UTRAN Mobile ManagementUTRAN Mobile Management

z The UTRAN Mobile Management focus on the KPIs of the handover

procedures.

Soft handover

Hard handover InterRAT handover

InterRAT cell change order

Cell update

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SHO counterSHO counter

z Measurement Point

Stat. 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

z F1: Successful SHO procedure F2: SHO failure procedure (activesetupdate 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 UPDATECOMPLETE TIME OUT

UE RNC

A

B

MEASUREMENT REPORT

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SHO counterSHO counter

z Soft handover KPI

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

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

z Overall counter Soft HO request

Soft HO success

Softer HO request

Softer HO success

z Typical Service based counter

AMR speech

CS64kbps

PS64kbps

PS128kbps

PS384kbps

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SHO counterSHO counter

z Failure cause counter

configuration unsupported

incompatible simultaneous reconfiguration

invalid configuration No response

Other cause

z 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)

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HHO counterHHO counter

z Measurement Point

Stat. 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 SETUP

REQUEST

UE NodeB RNC

RADIO LINK SETUPRESPONSE

A

B

PHYSICAL CHANNEL RECONFIGURATION

PHYSICAL CHANNELRECONFIGURATION COMPLETE

C

MEASUREMENT REPORT

z 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

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HHO counterHHO counter

z 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

z 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

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HHO counterHHO counter

z Typical Service based counter

AMR speech

CS64kbps

PS64kbps

PS128kbps

PS384kbps

z Failure cause counter

Configuration unsupported

Physical channel failure

Incompatible simultaneous reconfiguration

Cell update occurred

Invalid configuration

No response

Other cause

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Inter-RAT Handover out counterInter-RAT Handover out counter

z Measurement Point

Stat. 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

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Inter-RAT handover out counterInter-RAT handover out counter

z 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

z Overall counter

Handover outgoing prepare

Handover outgoing prepare success

Handover outgoing attempt

Handover outgoing success

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Inter-RAT handover out counterInter-RAT handover out counter

z Failure cause counter

Prepare failure

9 Relocation Failure in Target CN/RNC or Target System

9 TRELOCalloc Expiry

9 Relocation not supported in Target RNC or Target system

9 No Resource Available

9 Unknown Target RNC

9 No response

9

Handover failure

9 Configuration Unsupported

9Physical Channel Failure

9 Unspecified

9 Relocation abort

9 No response

9 Other cause

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Inter-RAT handover in counterInter-RAT handover in counter

z 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

RELOCATION

REQUESTACKNOWLEDGE

B

CRELOCATION

COMPLETE

D

NodeB UE

RADIO LINKRESTORE

INDICATION

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Inter-RAT handover in counterInter-RAT handover in counter

z 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

z Overall counter

Handover incoming request

Handover incoming prepare success

Handover incoming success

I RAT h d i

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Inter-RAT handover in counterInter-RAT handover in counter

z Failure cause Prepare failure

9 No Resource Available

9 Relocation Failure in Target CN/RNC or Target System

9 Relocation not supported in Target RNC or Target system

9 Relocation abort

9 Other cause

Handover failure

9 Relocation abort

9 No response

9 Other cause

I RAT ll hI t RAT ll h t

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Inter-RAT cell change counterInter-RAT cell change counter

z 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 Figure2

UE SRNC CN

CELL C HANGEORDER 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 RESPON

SRNS CONTEXT REQUES

SRNC CN

IU RELEASE COMMAND

IU RELEASE COMPLETEB

Inter-RAT cell change counterInter-RAT cell change counter

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Inter-RAT cell change counterInter-RAT cell change counter

z Inter-RAT cell change KPI

Success rate = Cell change success / Cell change outgoing request

z Overall counter

Cell change outgoing request Cell change outgoing success

z Typical bearer based counter

PS64kbps

PS128kbps

PS384kbps

z Failure cause counter

Configuration unacceptable

Physical Channel Failure

Unspecified

No response

Other

C ll d t tC ll d t t

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Cell update counterCell update counter

z 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

C ll d t tCell update counter

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Cell update counterCell update counter

z Cell update KPI

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

z Overall Counter

Cell update request Cell update success

z 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

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ContentsContents

UTRAN Call Setup

UTRAN Call Drop

UTRAN Mobil ity Management

Traffic Management

Algorithm Management

Traffic CounterTraffic Counter

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Traffic CounterTraffic Counter

z User number

RRC state based user number

9 Cell DCH, Cell FACH, Cell PCH, URA PCH

Traffic class based equivalent user

9 Conversational

9 Streaming

9 Interactive and background

z Cell throughput Directional counter

9 Cell uplink throughput

9 Cell downlink throughput

Traffic class based counter

9 Conversational, streaming, interactive, background

All supported bandwidth

Traffic CounterTraffic Counter

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Traffic CounterTraffic Counter

z Iub bandwidth utilization

Common channel (RACH, FACH, PCH) volume

Traffic class based service volume

Uplink and downlink volume

z OVSF code utilization

SF based

9 SF=4

9 SF=8

9

9 SF=512

z RTWP and Carrier Power

Cell RTWP

Transmission Carrier Power

ContentsContents

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ContentsContents

UTRAN Call Setup

UTRAN Call Drop

UTRAN Mobil ity Management

Traffic Management

Algorithm Management

Algorithm CounterAlgorithm Counter

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Algorithm CounterAlgorithm Counter

z DCCC Overall counter

9 Channel switch request

9 Channel switch success

DCHDCH channel switch counter

9 Channel switch success (DL Bit Rate upgrade )

9 Channel switch success (DL Bit Rate degrade )

DCHFACH/RACH channel switch counter

9 Channel switch success (To common channel)

9 Channel switch success (From common channel)

z AMRC

Uplink AMR control counter (degrade)

Downlink AMR control counter (upgrade)

z CAC

UL Admission deny counter

DL Admission deny counter

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Appendix: Nastar KPI Analysis RoutineAppendix: Nastar KPI Analysis Routine

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pp ypp y

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

Appendix: Nastar KPI Analysis Example

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z Step1: Check RRC metric item by RRC setup analysis issue

RRC SetupRate is

lower

Appendix: Nastar KPI Analysis Example

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

Appendix: Nastar KPI Analysis Example

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z Step3: Find the worst cell in TopN list

Appendix: Nastar KPI Analysis Example

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z Step4: Query RRC reject cause in specified cell by Forward

Appendix: Nastar KPI Analysis Example

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z Step5: Find the RRC reject cause in the worst cell