3G KPI Guidelines _ Tarun M - Academia

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3G KPI guidelines

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Appendix U12

UMTS Network KPI

NOTES:

This document can be used as an example of defining KPIs in a contract. It is inEricsson’s interest that KPIs are well defined, including:

a KPI target values (keep as few with targets as possible)

b Formula and measurement definitions (for drives and stats)

c Where and how KPI will be measured (locations, setup, tools, drive, statistics)

d Conditions – prerequisites, exclusions

e Statistical considerations

As much of this as practical should be defined in the contract, particularly anythingthat will limit Ericsson’s risks and costs.

Some of the material in this document may best be included in other parts of thecontract, including the Acceptance Procedure and associated documents.

KPI target values have very little meaning until the conditions of measurement aredefined as above. Committing to a target without defining how, when and where it willbe measured leaves Ericsson at great risk.

N.B. The KPIs and their targets included in this document may not be the onesrecommended by Ericsson. Refer to the KPI Technical Guidelines and KPI data basefor current recommendations.

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Table of Contents

UMTS NETWORK KPI.........................................................................................................................................................1

1 INTRODUCTION.................................................................................................................................................................3

SUMMARY OF LEVEL-1 KPI AND TARGETS..........................................................................................................................3

2 PERFORMANCE COMMITMENTS AND REQUIREMENTS.....................................................................................6

MILESTONE DEFINITION........................................................................................................................................................6

SCOPE....................................................................................................................................................................................6

GENERAL R EQUIREMENTS.....................................................................................................................................................6

CONTRACTUAL KPI COMMITMENTS.....................................................................................................................................7

3 UTRAN LEVEL-1 KEY PERFORMANCE INDICATORS............................................................................................7

CIRCUIT SWITCHED LEVEL-1 K EY PERFORMANCE I NDICATORS..........................................................................................7

3.1.1 Circuit Switched Call Setup.............................................................................................................................8

3.1.2 RRC Establishment Causes.............................................................................................................................9

3.1.3 CSV Access Failure.........................................................................................................................................9In the event that there are several consecutive RRC Connection Request only the first RRC connection request

shall be taken into account for the KPI calculation. .....................................................................................................11

Calls are considered as failed during access when a connection is attempted and the UE does not receive

Alerting/Connect message in case of drive test measurement. For OSS RANAP: RAB Assignment Response message

from the RNC to core Network is considered as a call successful setup........................................................................11

3.1.4 CSV Drop.......................................................................................................................................................11

3.1.5 CSV Quality...................................................................................................................................................12

3.1.6 CSV Cell Capacity.........................................................................................................................................143.1.7 CSV Soft/Softer Handover Overhead............................................................................................................15

3.1.8 CSV Inter-Radio Access Technology Handover Failure ..............................................................................16

3.1.9 CSV Call Setup Time.....................................................................................................................................18

3.1.10 CSD Access Failure.....................................................................................................................................19

In case there are several consecutive RRC Connection Requests only the first RRC connection request will be

taken into account for the KPI calculation.....................................................................................................................20

3.1.11 CSD Drop....................................................................................................................................................20

3.1.12 CSD Quality.................................................................................................................................................21

3.1.13 CSD Call Setup time....................................................................................................................................22

PACKET SWITCHED LEVEL-1 K EY PERFORMANCE I NDICATORS.........................................................................................233.1.14 Packet Switched Call Setup.........................................................................................................................23

3.1.15 PSD Access Failure ....................................................................................................................................24

3.1.16 PSD Drop....................................................................................................................................................26

3.1.17 PSD Latency................................................................................................................................................27

3.1.18 PSD Throughput .........................................................................................................................................27

3.1.19 PSD Call Setup Time...................................................................................................................................29

3.1.20 PSD Inter-Radio Access Technology Handover Failure.............................................................................29

3.1.21 PSD IRAT Interruption time........................................................................................................................303.1.22 HSDPA Access Failure................................................................................................................................31

3.1.23 HSDPA Drop...............................................................................................................................................33

3.1.24 HSDPA Latency...........................................................................................................................................34

3.1.25 HSDPA Throughput ............................................................................................................................... .....353.1.26 HSUPA Throughput ............................................................................................................................... .....36

3.1.27 HSDPA Data Session Setup Time................................................................................................................37

SYSTEM AVAILABILITY ......................................................................................................................................................38

3.1.28 Average Cell Availability.............................................................................................................................383.1.29 Average Cell Non-Maintenance Availability...............................................................................................39

COMPARISON OF UMTS AND GSM NETWORK PERFORMANCE.........................................................................................39

IMPACT OF UMTS ON GSM NETWORK PERFORMANCE.....................................................................................................40

4 UTRAN LEVEL-2 KEY PERFORMANCE INDICATORS .........................................................................................40

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1 Introduction

The purpose of this Appendix U12 is to define Network Key Performance Indicators (KPI) for the UMTS



The purpose of this Appendix U12 is to define Network Key Performance Indicators (KPI) for the UMTS

drive test, UTRAN counter based measurements and performance targets and formulas for each of the

KPI. All capitalized terms, acronyms, and definitions used in this Appendix U12 are listed in either the

UMTS Acronyms and Definitions (Appendix U18), or in the Original Agreement.

The UTRAN KPI definition and development effort is performed at the two levels as defined below:

Level-1 KPI: are the high-level metrics used for overall service quality measurement and monitoring

the health of Purchaser’s UTRAN Network. These metric definitions shall be agreed to by Seller,

and Seller‘s implementation of the Level-1 metrics shall be in compliance with Purchaser‘s

definitions defined in this Appendix U12.

Level-2 KPI: are the detailed engineering level metrics that shall be used for engineering,dimensioning the Network, the investigation and troubleshooting of problem areas in the UMTS

Network.

Summary of Level-1 KPI and Targets

NOTE: The selection of KPI and the target values should use theKPI Technical Guidelines and KPI Database. The following is anexample from a real contract and should NOT be seen asEricsson recommendation and must not be used in any contractin this form.

KPI Parameter Table

Reference

Pre-Launch

(Milestone 1)

Launch

(Milestone 2)

Post Launch

(Milestone 3)

CSV Access Failure Rate Table 3 ≤ 2.0 % ≤ 2.0 % ≤ 2.0 %

CSV Drop Rate Table 5 ≤ 2.0 % ≤ 2.0 % ≤ 2.0 %

CSV Quality (DL) Table 8 95th percentile

of samples ≤

2.0 % BLER

95th percentile of

samples ≤ 2.0 %

BLER

95th percentile

of samples ≤

2.0 % BLER

CSV Quality (UL) Table 8 95th percentile

of samples ≤

2.0 % BLER

95th percentile of

samples ≤ 2.0 %

BLER

95th percentile

of samples ≤

2.0 % BLER

Cell Capacity Table 10 ≥ 40 UE AMR

12.2k

(provided it isachieved in RF

design)

≥ 40 UE AMR

12.2k (provided it

is achieved in RFdesign)

Measure and

report

Soft/Softer Handover

Overhead

Table 12 ≤ 1.6 ≤ 1.6 ≤ 1.7

CSV IRAT Failure Rate Table 14 N/A ≤ 5.0 % ≤ 5.0 %

3 of 40

*Voice Call Setup time

(Mobile to PSTN)

Table 15 95th percentile

≤ 6 seconds

95th percentile ≤ 6

seconds

95th percentile ≤

6 seconds

*Voice Call Setup time

(Mobile to Mobile)

Table 15 95th percentile

≤ 9 seconds

95th percentile ≤

9 seconds

95th percentile

≤ 9 seconds

CSD Access Failure Rate Table 17 ≤ 3.0 % ≤ 2.0 % ≤ 2.0 %

CSD Drop Rate Table 19 ≤ 2.5 % ≤ 2.5 % ≤ 3.0 %

(Counter)

≤ 2.5 % (Drive



≤ 2.5 % (Drive

Test)

CSD Quality (DL) Table 21 95th percentileof samples ≤

1.0 % BLER

95th percentile of samples ≤ 1.0 %

BLER

95th percentileof samples ≤

1.0 % BLER

CSD Quality (UL) Table 21 95th percentile

of samples ≤

1.0 % BLER

95th percentile of

samples ≤ 1.0 %

BLER

95th percentile

of samples ≤

1.0 %BLER

*CSD Call Setup time Table 22 N.A 95th percentile ≤ 9

seconds

N.A

PSD Access Failure Rate Table 24 ≤ 2.0 % ≤ 2.0 % ≤ 2.0 %

PSD Drop Rate Table 26 ≤ 2.5 % ≤ 2.0 % ≤ 2.0 %

*PSD Latency (any R99RAB)

Table 28 N.A 95th

percentile

≤ 200ms

N.A

PSD R99 Average DL

throughput (kbps)

(Unloaded)

Table 31 ≥ 240 ≥ 240 ≥ 150 (Counter)

≥ 240 (Drive

Test)

PSD R99 Average DL

throughput (kbps)

(Loaded)

Table 31 ≥ 210 ≥ 210 ≥ 150 (Counter)

≥ 210 (Drive

Test)

PSD R99 Average UL

throughput (kbps)

(Unloaded)

Table 32 ≥ 200 ≥ 200 ≥ 150 (Counter)

≥ 200 (Drive

Test)

PSD R99 Average UL

throughput (kbps)

(Loaded)

Table 32 ≥ 180 ≥ 180 ≥ 150 (Counter)

≥ 180 (Drive

Test)

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