LTE eRAN6.0 KPI Introduction.pptx

8/11/2019 LTE eRAN6.0 KPI Introduction.pptx

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Copyright 2013 Huawei Technologies Co., Ltd. All rights reserved.

LTE eRAN6.0 KPIIntroduction


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Copyright 2013 Huawei Technologies Co., Ltd. All rights reserved. Page2

Objectives

Upon completion of this course, you will be able to:

Describe the classification of major KPI in LTE RAN

Describe the details of each KPI, eg. definition and calculation

formula

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Contents

1. KPI Overview

2. Performance KPI Details

3. Driver test KPI

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Classification of KPI Measurement

The quality of network performance is mainly evaluated by KPI(Key Performance Index)

Drive Test KPI/ Stationary Test : Some KPIs should be attainedby drive test, such as such as coverage KPI and latency KPI,

measurement results are coming from driver test toolsPerformance Measurement KPI: Most of KPIs are attained bythis approach, such as RRC success Rate, HHO success rate,eg,these KPIs are coming from eNodeB performance statistic.

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eRAN Performance KPI Overview

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Accessability

Retainability

Mobility

Utilization/availability

Majorperformance

KPI

RRC setup success rate

ERAB setup success rateCall setup success rate

Call drop rate (VoIP)Service drop rate (all)

Intra_fre HO out success rateInter_fre HO out success rateHO in success rateInter_RAT HO out success rate

RB utilizing rate Average CPU loadRadio network unavailability rate

Service intergrityCell download averagethroughputCell uplink average throughput


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Measurement KPI - Attributes

DescriptionMeasurementScope

Formula

AssociatedCounters

Measurement KPIKPI name


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Performance Measurement System

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Measurement Object

Measurement

Unit 1

Measurement

Unit 2

Counter 1 Counter 2 Counter 3 Counter 4 Counter 5 Counter 6 Counter 7

Measurement

Family 1

Measurement

Family 2


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Performance Measurement Counter


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Contents

2. KPI Details

2.1 Accessibility KPI

2.2 Retainability KPIs

2.3 Mobility KPIs

2.4 Service Integrity KPIs

2.5 Utilization/Availability KPIs

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Contents

2. KPI Details


2.1.1 RRC Setup Success Rate

2.2.2 E-RAB Setup Success Rate

2.2.3 Call Setup Success Rate

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RRC Connection Cause

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RRC Connection

UE - eNB

RRC causes:MO signaling (Signaling)MO data (Service)MT access (Service)

Emergency (Service)High Priority Access


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RRC Setup Success Rate

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KPI name RRC Setup Successful Rate

Measurementscope

Cell/Cluster

Formula

Unit Percentage(%)

%100 _ ionAttempt RRCConnect ionSuccess RRCConnect

SR RRC


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Associated Counters

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RRC Setup Failure Reason

Possible reason:

Resource allocation failure (admission failure)

No response from UE ( Poor coverage or terminal problem)

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Figure 1 Figure 2


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Contents

2. KPI Details


2.1.1 RRC Success Rate

2.2.2 E-RAB Success Rate


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Radio Access Bearer (E-RAB)

SGW

E-RAB

UE - SGWUser-Data

E-RAB

UE

Type of bearers

Default bear: With default QCI which is specified in HSS Dedicate bear: With dedicated QCI which is negotiated byPDN-GW and PCRF


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E-RAB Setup Success Rate (VoIP)

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KPI name ERAB Setup Success Rate (VoIP)

Measurement scope Cell/Cluster

Formula

Unit Percentage(%)

%100 _ tupAttempt VoIPERABSetupSuccessVoIPERABSe

SRVoIPERABS

VoIP is related with QCI 1 bearer


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E-RAB Setup Success Rate (All Service)

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KPI name ERAB Setup Success Rate (All service)

Measurementscope

Cell/Cluster

Formula

Unit Percentage(%)

%100 _ ttempt ERABSetupAuccess ERABSetupS SR ERABS


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Associated Counters Initial E-RAB Setup

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L.E-RAB.IntialAttEst.QCI.x

L.E-RAB.InitialSuccEst.QCI.x


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Associated Counters Dedicated E-RAB Setup

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L.E-RAB.AttEst.QCI.x

L.E-RAB.SuccEst.QCI.x


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Contents

2. KPI Details


2.1.1 RRC Setup Success Rate

2.2.2 E-RAB Success Rate


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Call Setup Success Rate

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KPI name Call Setup Success Rate

Measurement scope

Cell/Cluster

Formula

Unit Percentage(%)

%100

1

1

ttemp ERABSetupAucess ERABSetupS

shAttempt ionEstabliSigConnect S shSuccessionEstabliSigConnect S

ionAttempt RRCConnect ionSuccess RRCConnect

CSSR service

service


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Counters For S1 Dedicated SignalingSetup

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L.S1Sig.ConnEst.Att

L.S1Sig.ConnEst.Succ


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Contents

2. KPI Details



2.3 Mobility KPIs

2.4 Equipment Related

2.5 Utilization KPIs / Traffic KPI

2.6 Transport Performance Counter

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VoIP Call Drop Rate

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KPI name VoIP call drop rate

Measurementscope

Cell/Cluster

Formula

Unit Percentage(%)

%100Re Re _

leaseVoIPERAB leasenormal VoIPERABABCDRVoIP


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Service Drop Rate (All)

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KPI name ERAB drop rate

Measurementscope

Cell/Cluster

Formula

Unit Percentage(%)

%100Re

Re

_

lease ERAB

leaseal ERABABnorm

CDRService


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E-RAB Release

Normal releaseReleased with the normal procedure, the statistic is based on each QCIindex

Abnormal release

Considered as service(call) drop, the statistic can be based on differentrelease cause and each QCI index

Possible causes:

EPC failure

Radio link failure

Handover failureTransport failure

Network congestion

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Abnormal Release

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Figure 1 Figure 2

Figure 3 Figure 4

L.E-RAB.AbnormalRel.QCI.x


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Normal Release

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Figure 1

Figure 2L.E-RAB.NormalRel.QCI.x


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Intra/Inter-frequency Handover OutSuccess Rate

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KPI name Intra/Inter-frequency Handover Out SuccessRate

Measurementscope

Cell/Cluster

Formula

Unit Percentage(%)

%100 _

t OOutAttemp IntraFreqH

sOOutSucces IntraFreqH SROOut IntraFreqH

%100 _ t OOutAttemp InterFreqH

sOOutSucces InterFreqH SROOut InterFreqH

Note: In HW eNodeB, all the handover attempt statistic is calculated afteradmission control in target cell, which means HO failure statistic excludeadmission failure


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Associated Counters (Intra eNB)

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L.HHO.IntraeNB.IntraFreq.ExecAttOut

L.HHO.IntraeNB.IntraFreq.ExecSuccOut

L.HHO.IntraeNB.InterFreq.ExecAttOut

L.HHO.IntraeNB.InterFreq.ExecSuccOut

Note: In HW eNodeB, all the handover attempt statistic is calculated afteradmission determination in target cell,


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Associated Counters (Inter eNB)X2 Based Handover

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Handover Based on X2 interface

L.HHO.IntereNB.IntraFreq.ExecAttOutL.HHO.IntereNB.InterFreq.ExecAttOut

L.HHO.IntereNB.IntraFreq.ExecSuccOutL.HHO.IntereNB.InterFreq.ExecSuccOut


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Associated Counters (Inter eNB)S1 based Handover

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Handover Based on S1 interface

L.HHO.IntereNB.IntraFreq.ExecAttOutL.HHO.IntereNB.InterFreq.ExecAttOut

L.HHO.IntereNB.IntraFreq.ExecSuccOut

L.HHO.IntereNB.InterFreq.ExecSuccOut


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Handover In Success Rate

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KPI name Handover In Success Rate

Measurement scope Cell/Cluster

Formula

Unit Percentage(%)

%100 _ t HOInAttemp

s HOInSuccesSR HOIn


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Associated Counters (Intra eNB)

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L.HHO.IntraeNB.ExecAttIn

L.HHO.IntraeNB.ExecSuccIn


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Related Counters (Inter eNB)X2 Handover

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Handover Based on X2 interface

L.HHO.IntereNB.ExecAttIn

L.HHO.IntereNB.ExecSuccIn


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Related Counters (Inter eNB)S1 Handover

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Handover Based on S1 interface

L.HHO.IntereNB.ExecAttIn

L.HHO.IntereNB.ExecSuccIn


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Inter_RAT Handover Out SuccessRate (LTE to WCDMA)

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KPI name Inter-RAT Handover Out Success Rate (LTE toWCDMA)

Measurementscope

Cell/Cluster

Formula

Unit Percentage(%)

%100 _ 2 _ _ 2 _ _ 2 _

Attempt W E IRATHOSuccessW E IRATHOSRW E IRATHO


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Associated Counters

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L.IRATHO.E2W.ExecAttOut

L.IRATHO.E2W.ExecSuccOut


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Inter_RAT Handover Out SuccessRate (LTE to GSM)

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KPI name Inter-RAT Handover Out Success Rate (LTE to GSM)

Measurement

scope

Cell/Cluster

Formula

Unit Percentage(%)

%100 _ 2 _ _ 2 _

_ 2 _ Attempt G E IRATHOSuccessG E IRATHO

SRG E IRATHO


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Associated Counters

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L.IRATHO.E2G.ExecAttOut

L.IRATHO.E2G.ExecSuccOut


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Contents

2. KPI Details2.1 Accessibility KPI


2.3 Mobility KPIs2.4 Service Integrity KPIs

2.5 Utilization/Availability KPIs / Traffic KPI

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Cell Downlink Average Throughput

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KPI name Downlink Average Throughput

Measurementscope

Cell/Cluster

Formula

Unit bps

sferTimeCellDLTran

ficVolumeCellDLTraf hpCellDLAveT


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Related Counter - DL Traffic Volume

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Description:The counters measure the total traffic volume of transmitted

PDCP SDUs for each service with a specific QCI ranging from

1 to 9 in a cell.

Measurement Point

The size of the payloads in the transmitted PDCP SDUs of

each service with a specific QCI is sampled in a cell. At the end

of a measurement period, the sum of these sampling results isused as the value of the corresponding counter.


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Related Counter DL TransmissionTime

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Description:The counters measure the transmit duration of downlink PDCP

SDUs for services with a specific QCI ranging from 1 to 9 in a cell.

Measurement Point

The transmit duration of downlink PDCP SDUs for each service

with a specific QCI ranging from 1 to 9 in a cell is sampled per

millisecond. If there is downlink data transmission within this

millisecond, the sampling result of the corresponding counter is 1.

At the end of a measurement period, the sum of these samplingresults is used as the value of the corresponding counter.


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Cell Uplink Average Throughput

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KPI name Downlink Average Throughput

Measurementscope

Cell/Cluster

Formula

Unit bps

sferTimeCellULTran

ficVolumeCellULTraf hpCellULAveT


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Related Counter - UL Traffic Volume

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Description:The counters measure the total traffic volume of received

PDCP SDUs for each service with a specific QCI ranging from

1 to 9 in a cell.

Measurement Point

The size of the payloads in the received PDCP SDUs of each

service with a specific QCI is sampled in a cell. At the end of a

measurement period, the sum of these sampling results is

used as the value of the corresponding counter.


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Related Counter UL Receiving Time

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Description:The counters measure the receive duration of uplink PDCP SDUs

for services with a specific QCI ranging from 1 to 9 in a cell.

Measurement Point

The receive duration of uplink PDCP SDUs for each service with a

specific QCI ranging from 1 to 9 in a cell is sampled per

millisecond. If there is uplink data receiving within this millisecond,

the sampling result of the corresponding counter is 1. At the end

of a measurement period, the sum of these sampling results isused as the value of the corresponding counter.


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Contents

2. KPI Details2.1 Accessibility KPI


2.3 Mobility KPIs2.4 Service Integrity KPIs

2.5 Utilization/Availability KPIs

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CPU Usage Measurement

LMPT LTE Main Processing & Transmission Unit (in slot 7)LBBP LTE BaseBand Processing Unit (First LBBP in Slot 3)

Measurement Object: Cabinet No.=0,Subrack No.=0, Slot No.=7

Measurement Object: Cabinet No.=0,Subrack No.=0, Slot No.=3

Slot No.=2Slot No.=1


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Resource Block Utilizing Rate

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KPI name Resource Block Utilizing Rate

Measurementscope

Cell/Cluster

Formula

Unit Percentage(%)

%100 _

_ _

DL

DL

DL

Available RB

Used RBUR RB

%100 _

_ _ UL

UL

UL

Available RBUsed RB

UR RB


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Associated Counters

Average number of used downlink PRBsMeasurement point: The number of used downlink PRBs in a cell

is sampled per second. At the end of a measurement period, the

average of these sampling results is used as the value of the

counter

Average number of used uplink PRBs

Measurement point: The number of PRBs over the PUCCH in a

cell is sampled per second .At the end of a measurement period,

the average of these sampling results is used as the value of the

counter.

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Radio Network Unavailability Rate

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KPI name Radio Network Unavailability Rate

Measurementscope Radio network (Cluster)

Formula

SP:indicates the report period of counters in minute

Unit Percentage(%)

% 100 60 * } { *

_ _ x SP TheTotalNumberOfCellsInCluser

CellUnavailTime Rate Unavail RAN


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Contents

1. KPI Overview2. Performance KPI

3. Driver test KPI

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Coverage Ratio

Object : Coverage test (RSRQ & RSRP)Evaluation formula:

Coverage radio = valid test kilometers / total test kilometers

Standard:

The valid test kilometers should be satisfied for RSRP -

110dBm RSRQ -3dB

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KPI category in EUTRANKPI introduction

Counter details

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Summary


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Abbreviation

ERAB: E-UTRAN Radio Access BearerRRC: Radio Resource Control

MRC: Maximum Ratio Combining

PSIC: Parallel Soft Interference Cancellation

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Documents

LTE eRAN6.0 KPI Introduction.pptx