1 umts radio network kpi-108

UMTS Radio Network KPI

ZTE University

Content

KPI Classification RAN KPI Definition and Measurement KPI Optimization KPI monitor KPI Case study

KPI Overview

NetNumen™M31 (RAN) Mobile Network Element Management System is ZTE Element Management System of operation and management for one or more NEs. (FM, PM, CM)

Performance Monitor (according to the importance and usage):

KPI PI: Performance Indicator SPI: statistical performance indicator: with statistical rule such as

call completion rate>95%. Customized performance index

EMS KPI Monitor Tools: Performance management Fault Management Configuration Management

Coverage Probability

Coverage Class Mobility Class

RNC Soft Handover Success rate Inter-Frequency Hard Handover Success rate Inter-RAT Hard Handover Success rate (CS domain and PS domain) …

QoS Class

RRC Establishment success rate RAB Establishment success rate Radio Access Success Rate Call drop rate Average UL/DL Throughput RTT Ping with 32 Bytes …

Resource Usage Class

Trouble Cell rate Busy Cell rate Sleeping Cell rate …

Capacity Class

CS Capacity PS Capacity Cell UL Load Factor Block Call rate …

RAN KPI Class

RAN KPI Category

Content


Statistic Period ：－

Statistic Area ： Clutter-wise

Indoor or Outdoor ： BOTH

Measurement Methods ： DT or CQT

Index Meaning ： The coverage probability reflects the RF coverage strength and RF signal quality.

Statistic Period ：－

Statistic Area ： Clutter-wise


Measurement Methods ： DT or CQT

Index Meaning ： The coverage probability reflects the RF coverage strength and RF signal quality.

Indicator Indicator DescriptionDescription

Indicator Indicator

DefinitionDefinitionSignaling FlowSignaling Flow Indicator Indicator

ExtensionExtension


Indicator Indicator ExtensionExtensionSignaling FlowSignaling Flow

Indicator Indicator

DefinitionDefinitionIndicator Indicator DescriptionDescription

Downlink: F=RSCP > R & Ec/Io > S

Uplink: TxPwr < T

Coverage Probability is defined as the percentage of the samples whose F=1 for all the measured samples(Note ： Unreasonable samples are not included ）

R and S are different for different services



Indicator Indicator DefinitionDefinition Signaling FlowSignaling Flow Indicator Indicator

ExtensionExtension

Statistic Period :15 Mins, 30 Mins,1 Hour…. 1Day….

Statistic Area ： cell-wise


Measurement Method ： calculate based on the OMC Counters’ value

Indicator Meaning ： this indicator reflects the accessibility of the Cell

Statistic Period :15 Mins, 30 Mins,1 Hour…. 1Day….

Statistic Area ： cell-wise


Measurement Method ： calculate based on the OMC Counters’ value

Indicator Meaning ： this indicator reflects the accessibility of the Cell

RRC Establishment Success Rate



ExtensionExtension


＝ RRC Connection Setup Complete Times/RRC Connection Request Times×100%


UE RNC CN

RRC Connection Request

RRC Connection Setup

RRC Connection Complete

DT Message Exchange

Radio Bearer Setup

RAB Assignment Request

Established

Radio Bearer Setup Complete

RAB Assignment Response

RRC Connection Setup Request Times

RRC Connection Setup Complete Times



ExtensionExtension


Statistic Period : 15 Mins, 30 Mins,1 Hour…. 1 Day….

Statistic Area: RNC & Cell-wise

Indoor or Outdoor: BOTH

Measurement Method: calculate based on the OMC Counters’ value

Indicator Meaning: RAB assignment is the last step of the service connection. If it is successfully assigned, the connection to the User Panel is Successfully Setup

Statistic Period : 15 Mins, 30 Mins,1 Hour…. 1 Day….

Statistic Area: RNC & Cell-wise



Indicator Meaning: RAB assignment is the last step of the service connection. If it is successfully assigned, the connection to the User Panel is Successfully Setup



ExtensionExtension

RAB Establishment Success Rate

RAB Establishment Success rate

＝（ CS RAB Assignment Success Times +PS RAB Assignment Success Times ）

/(CS RAB Assignment Request Times＋ PS RAB Assignment Request Times ） ×100%



ExtensionExtension


UE RNC CN




DT Message Exchange

Radio Bearer Setup


Established



RAB Assignment Request Times

RAB Assignment Success Times



ExtensionExtension


CS RAB Establishment Success rate PS RAB Establishment Success rate AMR RAB Establishment Success rate CS C 64/64 RAB Establishment Success rate PS I 64/64 RAB Establishment Success rate PS I 64/128 RAB Establishment Success rate PS I 64/384 RAB Establishment Success rate ……

CS RAB Establishment Success rate PS RAB Establishment Success rate AMR RAB Establishment Success rate CS C 64/64 RAB Establishment Success rate PS I 64/64 RAB Establishment Success rate PS I 64/128 RAB Establishment Success rate PS I 64/384 RAB Establishment Success rate ……


Indicator Indicator

DefinitionDefinitionSignaling FlowSignaling Flow

Indicator Indicator

ExtensionExtension


Statistic Period: 15 Mins, 30 Mins, 1 Hour…. 1 Day….

Statistic Area: Cell-wise


Measurement Method: calculate based on the OMC counters’ value

Indicator Meaning: this indicator reflects the accessibility of the service of the Cell

Statistic Period: 15 Mins, 30 Mins, 1 Hour…. 1 Day….

Statistic Area: Cell-wise



Indicator Meaning: this indicator reflects the accessibility of the service of the Cell


Indicator Indicator


Indicator Indicator

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Radio Access Success Rate

Call Setup Success Rate

＝ RRC Establishment Success Rate (Service Related)×RAB Establishment Success rate×100%


Indicator Indicator


Indicator Indicator

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UE RNC CN




DT Message Exchange

Radio Bearer Setup


Established




RABEstablishmentSuccess Rate


Indicator Indicator


Indicator Indicator

ExtensionExtension


AMR Call Setup Success rate CS C 64/64 Call Setup Success rate PS I 64/64 Call Setup Success rate PS I 64/128 Call Setup Success rate PS I 64/384 Call Setup Success rate PS S 64/64 Call Setup Success rate ……

AMR Call Setup Success rate CS C 64/64 Call Setup Success rate PS I 64/64 Call Setup Success rate PS I 64/128 Call Setup Success rate PS I 64/384 Call Setup Success rate PS S 64/64 Call Setup Success rate ……


Indicator Indicator


Indicator Indicator

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Statistic Period: 15 Mins, 30 Mins, 1 Hour…. 1Day….

Statistic Area: RNC & Cell-wise Indoor or Outdoor: BOTH


Indicator Meaning: this indicator reflects the Retainability of the network, it is one of the most important indicators of the customer’s experience.

Statistic Period: 15 Mins, 30 Mins, 1 Hour…. 1Day….

Statistic Area: RNC & Cell-wise Indoor or Outdoor: BOTH


Indicator Meaning: this indicator reflects the Retainability of the network, it is one of the most important indicators of the customer’s experience.


Indicator Indicator


Indicator Indicator

ExtensionExtension

Call Drop Rate

Call Drop Rate

＝（ RNC Triggered CS RAB Release Number＋ RNC Triggered PS RAB Release Number ）

/(Total RAB Release number for CS+ Total RAB Release number for PS)

×100%


Indicator Indicator


Indicator Indicator

ExtensionExtension

Call Drop Rate

CN

RABRELEASE REQUEST

RNC

RNC Triggered RAB Release Times


Indicator Indicator


Indicator Indicator

ExtensionExtension

Call Drop Rate

CS Call Drop rate PS Call Drop rate AMR Call Drop rate CS C 64/64 Call Drop rate PS 64/64 Call Drop rate PS 64/128 Call Drop rate PS 64/384 Call Drop rate ……

CS Call Drop rate PS Call Drop rate AMR Call Drop rate CS C 64/64 Call Drop rate PS 64/64 Call Drop rate PS 64/128 Call Drop rate PS 64/384 Call Drop rate ……


Indicator Indicator


Indicator Indicator

ExtensionExtension

Call Drop Rate

Statistic Period: 15 Mins, 30 Mins, 1 Hour…. 1Day

Statistic Area: Cell-wise Indoor or Outdoor: BOTH


Indicator Meaning: Rate of blocked calls due to resource shortage.

This index partially reflects the degree of congestion in the cell.

Statistic Period: 15 Mins, 30 Mins, 1 Hour…. 1Day

Statistic Area: Cell-wise Indoor or Outdoor: BOTH


Indicator Meaning: Rate of blocked calls due to resource shortage.

This index partially reflects the degree of congestion in the cell.


Indicator Indicator


Indicator Indicator

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Call Blocking Rate

Call Blocking Rate

＝ The number of blocked calls/ The number of call admission requests Times×100%


Indicator Indicator


Indicator Indicator

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Call Blocking Rate

Statistic Period: 15 Mins, 30Mins, 1Hour…. 1Day Statistic Area: RNC-wise



Indicator Meaning: this indicator reflects the soft handover mobility in the RNC control area.

Statistic Period: 15 Mins, 30Mins, 1Hour…. 1Day Statistic Area: RNC-wise



Indicator Meaning: this indicator reflects the soft handover mobility in the RNC control area.


Indicator Indicator


Indicator Indicator

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Soft Handover Success Rate


＝（ Soft Handover Attempted Times－ Soft Handover Failure Times ）

/Soft Handover Attempted Times×100%


Indicator Indicator


Indicator Indicator

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UE UTRAN

ACTIVE SET UPDATE

ACTIVE SET UPDATE COMPLETE

A

B

Success flow

Soft Handover Attempted Times

Soft Handover Failure Times.

Failure Flow UE UTRAN

ACTIVE SET UPDATE

ACTIVE SET UPDATE FAILURE

A

B


Indicator Indicator


Indicator Indicator

ExtensionExtension


Configuration unsupported failure caused handover failure rate Physical channel failure caused handover failure rate Incompatible simultaneous reconfiguration caused handover

failure rate Protocol error caused handover failure rate Cell update occurred caused handover failure rate Invalid configuration caused handover failure rate No reply caused handover failure rate ……

Configuration unsupported failure caused handover failure rate Physical channel failure caused handover failure rate Incompatible simultaneous reconfiguration caused handover

failure rate Protocol error caused handover failure rate Cell update occurred caused handover failure rate Invalid configuration caused handover failure rate No reply caused handover failure rate ……


Indicator Indicator


Indicator Indicator

ExtensionExtension


Statistic Period: 15Mins, 30Mins, 1Hour…. 1Day Statistic Area: cell-wise



Indicator Meaning: this indicator reflects the hard handover mobility in the RNC control area.

Statistic Period: 15Mins, 30Mins, 1Hour…. 1Day Statistic Area: cell-wise



Indicator Meaning: this indicator reflects the hard handover mobility in the RNC control area.


Indicator Indicator


Indicator Indicator

ExtensionExtension

Inter-Frequency Hard Handover Success Rate


＝（ Inter-Frequency Hard Handover Attempted Times－ Inter-Frequency Hard Handover Failure Times ）

/ Inter-Frequency Hard Handover Attempted Times ×100%

Inter-Frequency Hard Handover should Include Intra-RNC Hard Handover and Inter-RNC Hard Handover


Indicator Indicator


Indicator Indicator

ExtensionExtension


UE SRNC

PHYSICAL CHANNEL RECONFIGURATION

PHYSICAL CHANNEL RECONFIGURATION COMPLETE

UE SRNC

PHYSICAL CHANNEL RECONFIGURATION

PHYSICAL CHANNEL RECONFIGURATION FAILURE

Success Flow

Failure Flow

Inter-frequency hard handover Attempted times

Inter-frequency hard handover failure times

Intra-RNCInter-FrequencyHard HandoverFlow


Indicator Indicator


Indicator Indicator

ExtensionExtension


UE Serving RNCDrift RNC MSC/SGSN

Decision to executeHard Handover

RANAP RANAP

RelocationRequired

RANAP RANAPRelocation Request

RANAP RANAPRelocation Request Ack.

RANAP RANAP

RelocationCommand

RANAP RANAPRelocation Detect

RANAP RANAPRelocation Complete

RANAP RANAP

Iu ReleaseCommand

RANAP RANAP

Iu ReleaseComplete

Node BDrift RNS

Node BServing RNS

NBAP NBAPRadio Link Setup

NBAP NBAPRadio Link Setup Response

RRCRRCPhysical Channel Reconfiguration

NBAP NBAPRadio Link Restore Indication

RRCRRCPhysical Channel Reconfiguration Complete

RRCRRCUE Mobility Information

RRCRRCUE Mobility Information CONFIRM

NBAPNBAPRadio Link Deletion Request

NBAPNBAPRadio Link Deletion Response

[A1]

[B1]

[A2]

[B2]

Sent from SRNC

Feedback to DRNC

Inter-RNCInter-FrequencyHard HandoverFlow


Configuration unsupported caused intra-NodeB inter-frequency hard handover failure rate

Configuration unsupported caused intra-RNC inter-frequency hard handover failure rate

Configuration unsupported caused inter-RNC inter-frequency hard handover failure rate

Physical channel failure caused intra-NodeB inter-frequency hard handover failure rate

Physical channel failure caused intra-RNC inter-frequency hard handover failure rate

Physical channel failure caused inter-RNC inter-frequency hard handover failure rate

……

Configuration unsupported caused intra-NodeB inter-frequency hard handover failure rate

Configuration unsupported caused intra-RNC inter-frequency hard handover failure rate

Configuration unsupported caused inter-RNC inter-frequency hard handover failure rate

Physical channel failure caused intra-NodeB inter-frequency hard handover failure rate

Physical channel failure caused intra-RNC inter-frequency hard handover failure rate

Physical channel failure caused inter-RNC inter-frequency hard handover failure rate

……


Indicator Indicator


Indicator Indicator

ExtensionExtension


Statistic Period: 15Mins, 30Mins, 1Hour…., 1Day Statistic Area: cell-wise or RNC-wise


Measurement Method ： Calculate based on OMC Counters’ value

Indicator Meaning: this indicator reflects the Inter-RAT CS handover mobility, the handover is from UMTS system to GSM system.




Indicator Meaning: this indicator reflects the Inter-RAT CS handover mobility, the handover is from UMTS system to GSM system.



ExtensionExtension

Inter-RAT CS Outgoing Handover Success rate （ UMTS->GSM ）

CS Inter-RAT Handover Success Rate （ UMTS->GSM ）

＝ 1 － CS Inter-RAT Handover From UTRAN Failure Times/CS Inter-RAT Handover From UTRAN Required Times×100%



ExtensionExtension

Inter-RAT CS Outgoing Handover Success Rate （ UMTS->GSM ）

Prepare handover

Handover fromUTRAN command

Prepare handoverresponse

Relocationrequired

Handover complete

Relocationcommand

UE RNC CN 2GMSC

UE UTRAN

HANDOVER FROM UTRAN COMMAND

HANDOVER FROM UTRAN FAILURE

CS Inter-RAT Handover From UTRAN Required Times

CS Inter-RAT Handover From UTRAN Failure Times, if the handover is failed, RNC will receive this message

Success Flow

Failure Flow



ExtensionExtension


Configuration unsupported caused CS Inter-RAT handover from UTRAN failure rate

Physical channel failure caused CS Inter-RAT handover from UTRAN failure rate

Configuration incomplete caused CS Inter-RAT handover from UTRAN failure rate

Protocol error caused CS Inter-RAT handover from UTRAN failure rate Cell update occurred caused CS Inter-RAT handover from UTRAN failure

rate Invalid configuration caused CS Inter-RAT handover from UTRAN failure

rate No reply caused CS Inter-RAT handover from UTRAN failure rate ……

Configuration unsupported caused CS Inter-RAT handover from UTRAN failure rate

Physical channel failure caused CS Inter-RAT handover from UTRAN failure rate

Configuration incomplete caused CS Inter-RAT handover from UTRAN failure rate

Protocol error caused CS Inter-RAT handover from UTRAN failure rate Cell update occurred caused CS Inter-RAT handover from UTRAN failure

rate Invalid configuration caused CS Inter-RAT handover from UTRAN failure

rate No reply caused CS Inter-RAT handover from UTRAN failure rate ……


Indicator Indicator


Indicator Indicator

ExtensionExtension


Statistic Period: 15Mins, 30Mins, 1Hour…. 1Day Statistic Area: cell-wise or RNC-wise



Indicator Meaning: this indicator reflects the Inter-RAT handover mobility, the handover is from UMTS system to GPRS system.

Statistic Period: 15Mins, 30Mins, 1Hour…. 1Day Statistic Area: cell-wise or RNC-wise



Indicator Meaning: this indicator reflects the Inter-RAT handover mobility, the handover is from UMTS system to GPRS system.



ExtensionExtension

Inter-RAT PS Outgoing Handover Success Rate （ UMTS->GPRS ）

PS Inter-RAT Handover Success Rate （ UMTS->GPRS ）

＝ 1 － PS Inter-RAT Handover From UTRAN Failure Times/PS Inter-RAT Handover From UTRAN Required Times×100%



ExtensionExtension


UE NODEB RNC 3G SGSN

Cell change order from UTRAN Iu Release Command

RL Del Resp

RL Del Req

Iu Release Complete

UE UTRAN

CELL CHANGE ORDER FROM UTRAN

CELL CHANGE ORDER FROM UTRAN FAILURE

Success Flow

Failure Flow

PS Inter-RAT handover from UTRAN required Times

PS Inter-RAT handover from UTRAN failure times. If the RNC received this message, or response message of Iu Release Command is not received by RNC, it means the PS handover from UTRAN is failed.



ExtensionExtension


configuration unsupported caused PS Inter-RAT handover from UTRAN failure rate

physical channel failure caused PS Inter-RAT handover from UTRAN failure rate

configuration incomplete caused PS Inter-RAT handover from UTRAN failure rate

protocol error caused PS Inter-RAT handover from UTRAN failure rate cell update occurred caused PS Inter-RAT handover from UTRAN

failure rate invalid configuration caused PS Inter-RAT handover from UTRAN

failure rate No reply caused PS Inter-RAT handover from UTRAN failure rate ……

configuration unsupported caused PS Inter-RAT handover from UTRAN failure rate

physical channel failure caused PS Inter-RAT handover from UTRAN failure rate

configuration incomplete caused PS Inter-RAT handover from UTRAN failure rate

protocol error caused PS Inter-RAT handover from UTRAN failure rate cell update occurred caused PS Inter-RAT handover from UTRAN

failure rate invalid configuration caused PS Inter-RAT handover from UTRAN

failure rate No reply caused PS Inter-RAT handover from UTRAN failure rate ……


Indicator Indicator


Indicator Indicator

ExtensionExtension

Inter-RAT outgoing PS Handover Success Rate （ UMTS->GPRS ）




Indicator Meaning: this indicator reflects the Inter-RAT handover mobility, the handover is from GRRS system to UMTS system.




Indicator Meaning: this indicator reflects the Inter-RAT handover mobility, the handover is from GRRS system to UMTS system.



ExtensionExtension

Inter-RAT Incoming PS Handover Success Rate （ GPRS->UMTS ）


Indicator Indicator


ExtensionExtension

PS Inter-RAT Handover to UTRAN Success rate （ GPRS->UMTS ）

＝ PS Inter-RAT Handover to UTRAN Success Times/PS Inter-RAT Handover to UTRAN Attempted Times×100%

Inter-RAT Incoming PS Handover Success Rate （ GPRS->UMTS ）

UE Serving RNC

1. UE initiated signaling connection establishment

CN

2. Direct Transfer

3. Radio Access Bearer Establishment

The flow of PS Inter-RAT handover to UTRAN is similar to the PS setup flow on the UTRAN Side

RNC received message RRC Connection Request （ from UE, the cause is Inter-RAT cell reselection ） can be used for calculating the PS Inter-RAT handover to UTRAN required times ； RNC received message RRC Connection Complete (From UE) can be used for calculating the PS Inter-RAT handover to UTRAN success times


Indicator Indicator


ExtensionExtension

Inter-RAT Incoming PS Handover Success Rate (GPRS->UMTS ）

Statistic Period: －

Statistic Area: －


Measurement Method ： DT&CQT

Indicator Meaning: this indicator reflects the integrity of CS 12.2K service. It is one of the most important indicators of the customer’s experience.


Statistic Area: －



Indicator Meaning: this indicator reflects the integrity of CS 12.2K service. It is one of the most important indicators of the customer’s experience.

IndicatorIndicator

DescriptionDescription

IndicatorIndicator


IndicatorIndicator

ExtensionExtension

CS12.2K Service Access Time


＝ Average 【 T （ CC Alert)－ T （ RRC Connection Request ）】

IndicatorIndicator


Indicator Indicator


IndicatorIndicator

ExtensionExtension


UEUE RNSRNS CNCN Incoming CNIncoming CN

ISUP IAM

RRC DT(Call Proceeding)

RRC DT(CM Service Request)

CN Signaling Connection Process

Authority and Safe Mode Process

RRC DT(Setup)

RAB Assignment Process

ISUP ACMRRC DT (Alert) ISUP ANM RRC DT(Connect)

RRC DT(Connect ACK)

Service data （ talking… ）

CN Bear Setup ProcessT （ CC Alert ）



RRC Connection Setup Complete

T （ RRC Connection Request ）

IndicatorIndicator


Indicator Indicator


IndicatorIndicator

ExtensionExtension



Statistic Area: －



Indicator Meaning: this indicator reflects the integrity of CS 64K service. It is one of the most important indicators of the customer’s experience.


Statistic Area: －



Indicator Meaning: this indicator reflects the integrity of CS 64K service. It is one of the most important indicators of the customer’s experience.

IndicatorIndicator


IndicatorIndicator


IndicatorIndicator

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CS64K Service Access Time


＝ Average 【 T （ RRC Request)－ T （ CM Service Request ）】

IndicatorIndicator


Indicator Indicator


IndicatorIndicator

ExtensionExtension


ISUP IAM


RRC DT (Call Proceeding)




RRC DT (Setup)


ISUP ACMRRC DT (Alert) ISUP ANM RRC DT (Connect)

RRC DT (Connect ACK)


CN bear setup processT （ CC Alert ）




T （ RRC Connection Request ）

IndicatorIndicator


IndicatorIndicator


IndicatorIndicator

ExtensionExtension



Statistic Area: －



Indicator Meaning: this indicator reflects the integrity of PS service. It is one of the most important indicators of the customer’s experience.


Statistic Area: －



Indicator Meaning: this indicator reflects the integrity of PS service. It is one of the most important indicators of the customer’s experience.

IndicatorIndicator


IndicatorIndicator


IndicatorIndicator

ExtensionExtension

PS Service Access Time


＝ Average 【 T （ Active PDP Context Accept)－ T （ Activate PDP Context Request ）】

IndicatorIndicator


Indicator Indicator


IndicatorIndicator

ExtensionExtension


ISUP IAM


RRC DT (Active PDP Context Accept )




RRC DT (Activate PDP Context Request )


ISUP ACMRRC DT (Alert) ISUP ANM RRC DT (Connect)

RRC DT (Connect ACK)


CN bear setup process

Activate PDP Context Request




IndicatorIndicator


Indicator Indicator


IndicatorIndicator

ExtensionExtension


Active PDP Context Accept

Statistic Period: 15Mins, 30Mins, 1Hour…., 1Day Statistic Area: cell-wise



Indicator Meaning: this indicator reflects the traffic Erlang of the CS conversation service




Indicator Meaning: this indicator reflects the traffic Erlang of the CS conversation service

IndicatorIndicator


IndicatorIndicator


Indicator Indicator

ExtensionExtension

CS Service Traffic Erlang

CS Call Duration

＝∑【 Time （ Radio Link Setup Response ）－ Time （ Radio Link Deletion Response ）】

CS Service Traffic ERL ＝ Total CS Call Duration of a Certain Period/3600

IndicatorIndicator


Indicator Indicator


IndicatorIndicator

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CS AMR Voice Service Traffic Erlang

CS Video Phone Service Traffic Erlang

CS AMR Voice Service Traffic Erlang

CS Video Phone Service Traffic Erlang

IndicatorIndicator


Indicator Indicator


Indicator Indicator

ExtensionExtension





Indicator Meaning: this indicator reflects the total throughput of PS service




Indicator Meaning: this indicator reflects the total throughput of PS service

IndicatorIndicator


IndicatorIndicator


Indicator Indicator

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PS Service Throughput

UL PS Service Throughput ＝ RNC Received Total RLC PDU BytesDL PS Service Throughput ＝ RNC Sent Total RLC PDU Bytes

（ Including user data ， RLC head data ， retransfer data ， signaling data ， Unit ： Kbytes）

IndicatorIndicator


Indicator Indicator


IndicatorIndicator

ExtensionExtension


PS I 64/64 UL Throughput PS I 64/64 UL Throughput PS B 64/64 UL Throughput PS B 64/64 UL Throughput PS S 64/64 UL Throughput PS S 64/64 UL Throughput ……

PS I 64/64 UL Throughput PS I 64/64 UL Throughput PS B 64/64 UL Throughput PS B 64/64 UL Throughput PS S 64/64 UL Throughput PS S 64/64 UL Throughput ……

IndicatorIndicator


Indicator Indicator


IndicatorIndicator

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Statistic Period: 15Mins, 30Mins, 1Hour…., 1Day

Statistic Area: cell-wise


Measurement Method: Calculate based on Measurement Report value

Indicator Meaning: this indicator reflects the cell average UL load factor in a defined period, it is calculated based on the RTWP value on a certain frequency.

Statistic Period: 15Mins, 30Mins, 1Hour…., 1Day

Statistic Area: cell-wise



Indicator Meaning: this indicator reflects the cell average UL load factor in a defined period, it is calculated based on the RTWP value on a certain frequency.

IndicatorIndicator


Indicator Indicator


IndicatorIndicator

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UL Interference Load Factor


＝（ UL RTWP measurement value － N0 ）/UL RTWP measurement value×100%

IndicatorIndicator


Indicator Indicator


IndicatorIndicator

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Indicator Meaning: this indicator reflects the cell average DL load degree in a defined period, it is calculated based on the base station Tx power.




Indicator Meaning: this indicator reflects the cell average DL load degree in a defined period, it is calculated based on the base station Tx power.

IndicatorIndicator


Indicator Indicator


IndicatorIndicator

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DL Power Load Factor


＝ DL Average Transmitting Carrier Power/Configured DL Maximal Transmitting Carrier Power×100%

IndicatorIndicator


Indicator Indicator


IndicatorIndicator

ExtensionExtension


Statistic Period: 15Mins, 30Mins, 1Hour…., 1Day Statistic Area: RNC-wise



Indicator Meaning: this indicator reflects the rate of dead cells to total cells, it is an assistant to analyze the QoS of whole network.




Indicator Meaning: this indicator reflects the rate of dead cells to total cells, it is an assistant to analyze the QoS of whole network.

IndicatorIndicator


Indicator Indicator


IndicatorIndicator

ExtensionExtension

Trouble Cell Rate

Trouble Cell Rate

＝ Trouble Cell Number/ Active Cell Number×100%

Trouble Cell is the cell whose call drop rate >a ％ or Radio Access Success rate <b％

IndicatorIndicator


Indicator Indicator


IndicatorIndicator

ExtensionExtension

Trouble Cell Rate




Indicator Meaning: this indicator reflects the rate of busy cells to total cells, it is an assistant to analyze the QoS of whole network.




Indicator Meaning: this indicator reflects the rate of busy cells to total cells, it is an assistant to analyze the QoS of whole network.

IndicatorIndicator


Indicator Indicator


IndicatorIndicator

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Busy Cell Rate

Busy Cell rate

＝ Busy Cell Number/Active Cell Number×100 ％

Busy cell is the cell whose DL Power Load factor >c ％or Code Resource Occupation Factor >d ％

IndicatorIndicator


Indicator Indicator


IndicatorIndicator

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Busy Cell Rate




Indicator Meaning: this indicator reflects the rate of idle cells to total cells, it is an assistant to analyze the QoS of whole network.




Indicator Meaning: this indicator reflects the rate of idle cells to total cells, it is an assistant to analyze the QoS of whole network.

IndicatorIndicator


Indicator Indicator


IndicatorIndicator

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Sleeping Cell Rate

Sleeping Cell rate

＝ Sleeping Cell Number/Active Cell Mumber×100%

Sleeping Cell is the cell whose DL power load factor <e ％

IndicatorIndicator


Indicator Indicator


IndicatorIndicator

ExtensionExtension

Sleeping Cell Rate

Content


EMS KPI Optimization Process

Key KPIs Worth Your Attention


Cell RAB Establishment Success Rate, CS domain

Cell RAB Establishment Success Rate, PS domain

Cell RAB Establishment Success Rate


Call Drop Rate - Voice

Cell PS Call Drop Rate

Cell Success Rate of SHO

Cell Inter-RAT CS Outgoing Handover Success Rate(UMTS->GSM)


Radio access success rate = RRC establishment success rate × RAB establishment success rate

This formula indicates that RRC establishment rate and RAB establishment rate need to be considered in the background statistics.

RRC establishment success rate = Number of successful RRC connection setup times of each cell / Number of RRC connection request times of each cell × 100 ％

Note: related with services (RRC connection) RAB establishment success rate = Number of successful

RAB establishment times / Number of RAB establishment attempts × 100%

RAB establishment success rate is categorized by service.

Access Success Rate Analysis Process

Access Failure Caused by RAB Establishment Failure There are two restraints in RAB establishment process.

One is RB establishment which is the UE configuration process (usually no problems occur in this process); and the other is radio link re-configuration process in which NodeB links are configured. Failures often occur in the latter process. The usual causes for these failures include radio link re-configuration preparation failure (it occurs when problems occur in NodeB resources.), and radio link re-configuration cancellation (it occurs when problems occur in RNC internal resources or process). Another factor may also cause RAB failures, that is, when the load of a cell is relatively heavy, RNC sends out a reject command via admission control.

Call Drop Optimization

Handover Success Rate Optimization

Factors affecting handover success rate Handover area is too small, so that UEs have not enough time to

complete handover. Handover parameters are wrongly set, so that neighbor cells

cannot be added or deleted timely, or causing ping-pong handover. Neighbor cells are not configured. This may cause damage to the

network, not only directly causing call drop, but also brings extra interference towards the network.

Content


Resource KPI monitor One reason for resource limitation is number of 3G user increase, and operator

changing fee decrease also lead to the increase of average erlang. The other reason is the strategy for design is focus on user feeling and KPI but not system capacity. For example HK user average Erl could be up to 0.5E.

Resource KPI monitor Single user erlang could be 0.45erl on BH ：

Resource KPI monitor

Resource KPI and threshold. Resource KPI mainly include DL power, UL capacity, code resource and

CE resource.

Resource Type KPI id and name threshold

TCP

C301320150 Number of rejected services,DCH downlink TCP limit 50

PI30167 Average non-HSDPA TCP 40%

PI30092 Maximum Cell TCP (%) 100%

PI30093 Average Cell TCP 70%

UL TrafficPI30029 Handover Blocking Rate 0.5%

KPI RTWP （ in busy hour ） -98dBm

Code

C301320153 Number of rejected services, DCH no code 50

PI30205 Average Cell HSUPA Users 12

PI30172 Cell Average HSDPA Users 16

CEPI301830006 Maximum use Ratio of Uplink NodeB CE 60%

PI301830010 Maximum use Ratio of Downlink NodeB CE 60%

Resource KPI monitor

Related KPI

DL power monitor

RNC TCP limitation with CS call drop 2009-06-09 　 RNC Call Drop Rate,CS Traffic Volume, CS AMR(Erl) Number of rejected services,DCH downlink TCP limit

00:00:00 01:00:00 1.24% 851.54 5601:00:00 02:00:00 1.07% 481.2097 22 02:00:00 03:00:00 1.09% 253.1742 12 03:00:00 04:00:00 0.70% 134.0175 5 04:00:00 05:00:00 0.61% 84.9817 11 05:00:00 06:00:00 0.54% 66.0458 11 06:00:00 07:00:00 0.64% 102.6633 31 07:00:00 08:00:00 1.06% 259.94 235 08:00:00 09:00:00 1.31% 658.3644 2262 09:00:00 10:00:00 1.11% 1242.4528 1875 10:00:00 11:00:00 0.91% 1798.6944 3261 11:00:00 12:00:00 1.04% 2266.3008 7064 12:00:00 13:00:00 1.09% 2629.905 8398 13:00:00 14:00:00 0.99% 2488.7411 3719 14:00:00 15:00:00 1.05% 2494.8219 7936 15:00:00 16:00:00 1.05% 2598.1903 10515 16:00:00 17:00:00 1.16% 2762.4531 11489 17:00:00 18:00:00 1.20% 2930.3844 9926 18:00:00 19:00:00 1.45% 3336.4133 22875 19:00:00 20:00:00 1.29% 2674.1925 5196 20:00:00 21:00:00 1.04% 1946.7989 1288 21:00:00 22:00:00 1.13% 1858.4106 616 22:00:00 23:00:00 1.32% 1818.2567 575 23:00:00 00:00:00 1.35% 1445.835 216

DL power monitor Modify reserve HSDPA power according to system algorithm. MinHsdpaPower （ MinHspaPwrRto ） +NoHsPower >Node B

admission threshold （ MinHsdpaPower stands for HSDPA reserved power ）， DL congestion control will start (downgrade DL DCH rate)。 MinHspaPwrRto default value is 20%.

Number of rejected services,Handover

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2009-6-12 6 1 1 0 0 0 0 2 22 99 556649108471821954108121201760 66 9 19 13

2009-6-17 0 2 0 0 0 0 2 0 6 28 113187252 95 214261285367643 86 10 11 4 3

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DL power monitor

Because high load cell often be with high admission failure, normally we should fast downgrade to release radio resource ASAP. Avoid handover user could not handover in the cell then call dropped.(this action is only take effect in cell with much more PS users, if all users in the cell is in CS service. It will not take effect).

Abbreviated Name

Parameter nameRange

and StepCurrent Value

Update value

remark

UlDnMaxStgMaximum Number of Degraded Uplink Load Steps Every Time

[1, 8] 1 2Downgrade from

384kbps to 16kbps

DlDnMaxStgMaximum Number of Degraded

Downlink Load Steps Every Time[1, 8] 1 3

Downgrade from 384kbps to 8kbps

DL power monitor

Through decrease DL Eb/No could lead to reduced congestion. While we need detailed evaluation to avoid some other bad effect. Table showed record for the modification, and can be consider as the reference. ZTE engineering experience showed downgrade Eb/No for 13.6K signaling channel could reduce TCP limitation effectively, while the performance of access will not be affect so much.

Abbreviated Name

Parameter name

Current Value

Update value

remarkModify purpose

DlEbNoDownlink

Traffic Eb/No7.5 5.1

B class parameter ， service related parameter, modify 13.6K signaling only

(service class 5)

Reduce TCP Limit

UL capacity monitor

Call drop rate increasing not means UL capacity limitation, but call drop increasing is the most common scene for limitation. Because call drop rate is most cared KPI, and be observed every day.

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Cel l Cal l Drop Rate, CS1 Cel l Cal l Drop Rate, CS2

UL capacity monitor

RTWP increasing is the most directly representation for UL limitation, while sometimes reason for RTWP increasing could be external interference. And it’s hard to eliminate this reason.

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Maxi mum RTWP(dBm)1 Maxi mum RTWP(dBm)2

UL capacity monitor

Erlang is determining factor for UL limitation either. There are many factors related to the erlang of a cell. Normally we should care for cell capacity, if erlang in a cell exceed 20 erlang in BH.

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Cel l Traffi c Vol ume, CS(Er l )1 Cel l Traffi c Vol ume, CS(Er l )2

UL capacity monitor

UL Power control parameter modification. The quality of users will be down as a consequent of capacity increasing. Optimization will do trade-off between capacity and quality.

Abbreviated Name

Parameter meaning Modification objectCurrent Value

new value

effect

ULINITSIRUplink Initial SIR target (dB)

Uplink 3.4k/13.6k Signaling ， Uplink 12.2k AMR

4-5 3.5 Obviously

ULMAXSIRMaximum Uplink SIR target (dB)


15 10 Obviously

B class parameter

BLER Period Factor / Tolerance BLER Period


2/250 1/70 Obviously

UlSirTargDnStep

Uplink SIR Target Down Step Size (dB)


0.1 0.2A few improvement

UL capacity monitor

Through UL power control parameter optimization we can improve RTWP increasing, but some cells will be in trouble for user increasing. And further modification to SIRtarget will affect subscriber feeling. For this case ZTE suggest to define another set of power control parameter which is special for these high load cells. The following table is comparison of parameters for special site and parameters for normal site.

SRVTYPE ULINITSIR ULMAXSIR ULMINSIR

0 3.5->1.5 10.0->3.5 2.0->1.0

104 4.0->2.0 15.0->5.0 0.5->0

28 3.5->1.5 10.0->3.5 0.5->0

50 6.0->2.0 15.0->5.0 2.0->0

54 6.0->2.0 15.0->5.0 2.0->0

Code resource monitor

Through observing "Number of rejected services, DCH no code” we could know cell is in code limitation. Also “average code resource usage” and “HSDPA user number” could be factor for determination and optimization. We could modify the code allocation to reduce code limitation.

OcuRateNoHspdsch+OcuRateHspdsch+DpchCodeHy+32<=512 formula 1

OcuRateNoHspdsch+OcuRateHspdsch+CodeUptHyA>512 formula 2

“OcuRateHspdsch” is the number of code (SF=512) which is blocked by the code occupied by HS-PDSCH channel.

“OcuRateNoHspdsch” is the number of code (SF=512) which is blocked by the code occupied by not HS-PDSCH channel.

“DpchCodeHy” is the number of code (SF=512) reserved for DPCH channel. “CodeUptHyA” is the threshold to determine if we need decrease HS-PDSCH

channel number. When formula1 is fulfilled NO. of HS-PDSCH +1. When formula 2 is fulfilled NO. of HS-PDSCH -1.

Code resource monitor

To assure R99 user accessibility, the modification is apply.

Abbreviated Name

Parameter name

Range and Step

Current Value

Update value

remark

DpchCodeHy DPCH Code Hysteresis

0..512 16 28To decrease the number of rejected services for DCH no code

CodeUptHyACode Update Hysteresis A

0..512 16 28To decrease the number of rejected services for DCH no code

Content


Case 1: TCP Congestion at Victory Park

Background Victory Park more than

100,000 People Gathering Time is 20:00 June 4th

KPI Indication Performance deteriorate for

site VPK at Victory Park Call Drop Rate Increase Site VPK Transmission

Code Power Congestion

Case 1:Call Drop Rate & Number is high in VPK

Case 1:VPK Radio Access Rate and Rejected Services by TCP limit

Case 2: Wrong LAC Configuration

After the configuration data check, we found that there are several cells with a wrong LAC configuration.

We need KPI monitor tools to give us an evidence. Use SAY Site as an example:

Number of attempted RRC Establishment is more than 100,000 times while only around 6,000 times for services.

Case 3 ： High Call Drop Rate Due To The NSN Sites Interference Background

After the KPI monitoring, we found the drop rate around Convention and Exhibition Center is quite high.

After the drive test and KPI analysis, we found the reason is that the NSN LUR site F1 is still open.

After the site is turned off on 12th May the call drop rate decreased.

Case 3 ： High Call Drop Rate Due To The NSN Sites Interference

Site CTW has very high call drop rate. After checking the Fault management Alarm, there are a

lot of “board reboots alarm”. After checking the NodeB, the reason for this alarm is non-

sufficient power supply due to GSM, UMTS and NSN BTS in very narrow space with a temporary power solution.

Three times “Node B is out of service(198083023)” during 15:00 to 16:00 on June 11th.

Case 4: High Call Drop Rate due to Power Alarm

Case 4: High Call Drop Rate due to Power Alarm

Case 5: Iub E1/T1 Bandwidth Limitation

Background: After 80% NSN UMTS users are cut into the network on may 11th,

subscriber number increased a lot

KPI Indication: “Cell RAB establishment success rate” decreased a lot.

Analysis Capacity related. After checking the related configuration, Iub interface E1/T1

bandwidth limitation is a key reason for the problem.

Solution: Decrease some of the cells Pilot Channel Power Increase Iub interface bandwidth

Case 5: Iub E1/T1 Bandwidth Limitation

1 umts radio network kpi-108

Documents

measurement

dl power monitor

wrong lac

physical channel

tcc alertrrc

nsn sites

trrc connection

utran required