microsoft powerpoint - 08 oeo207010 lte eran6.0 kpi introduction issue1

Course Name 22.01.2014

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

LTE eRAN6.0 KPI Introduction

Copyright © 2013 Huawei Technologies Co., Ltd. All rights reserved. Page1

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

Page1





Contents

1. KPI Overview

2. Performance KPI Details

3. Driver test KPI

Page2


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 attained

by drive test, such as such as coverage KPI and latency KPI,

measurement results are coming from driver test tools

� Performance Measurement KPI: Most of KPIs are attained by

this approach, such as RRC success Rate, HHO success rate,eg,

these KPIs are coming from eNodeB performance statistic.

Page3





eRAN Performance KPI Overview

Page4

Accessability

Retainability

Mobility

Utilization/availa

bility

Major performance

KPI

RRC setup success rate

ERAB setup success rate

Call setup success rate

Call drop rate (VoIP)

Service drop rate (all)

Intra_fre HO out success rate

Inter_fre HO out success rate

HO in success rate

Inter_RAT HO out success rate

RB utilizing rate

Average CPU load

Radio network unavailability rate

Service intergrity Cell download average

throughput

Cell uplink average throughput


Measurement KPI - Attributes

Description

Measurement

Scope

Formula

Associated

Counters

Measurement KPI

KPI name





Performance Measurement System

Page6

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

…… ……


Performance Measurement Counter





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

Page8


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

Page9





RRC Connection Cause

Page10

RRC ConnectionUE - eNB

RRC causes:MO signaling (Signaling)MO data (Service)MT access (Service)Emergency (Service)High Priority Access


RRC Setup Success Rate

Page11

KPI name RRC Setup Successful Rate

Measurement scope

Cell/Cluster

Formula

Unit Percentage(%)

%100_ ×=

ionAttemptRRCConnect

ionSuccessRRCConnectSRRRC





Associated Counters

Page12







RRC Setup Failure Reason

� Possible reason:

� Resource allocation failure (admission failure)

� No response from UE ( Poor coverage or terminal problem)

Page15

Figure 1 Figure 2





Contents

2. KPI Details


2.1.1 RRC Success Rate

2.2.2 E-RAB Success Rate


Page16


Radio Access Bearer (E-RAB)

SGW

E-RABUE - 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 by

PDN-GW and PCRF





E-RAB Setup Success Rate (VoIP)

Page18

KPI name ERAB Setup Success Rate (VoIP)

Measurement scope Cell/Cluster

Formula

Unit Percentage(%)

%100_ ×=

tupAttemptVoIPERABSe

tupSuccessVoIPERABSeSRVoIPERABS

� VoIP is related with QCI 1 bearer


E-RAB Setup Success Rate (All Service)

Page19

KPI name ERAB Setup Success Rate (All service)

Measurement

scope

Cell/Cluster

Formula

Unit Percentage(%)

%100_ ×=

ttemptERABSetupA

uccessERABSetupSSRERABS





Associated Counters – Initial E-RAB Setup

Page20

L.E-RAB.IntialAttEst.QCI.x

L.E-RAB.InitialSuccEst.QCI.x






Associated Counters – Dedicated E-RAB Setup

Page22

L.E-RAB.AttEst.QCI.x

L.E-RAB.SuccEst.QCI.x







Contents

2. KPI Details


2.1.1 RRC Setup Success Rate

2.2.2 E-RAB Success Rate


Page25





Call Setup Success Rate

Page26

KPI name Call Setup Success Rate

Measurement scope

Cell/Cluster

Formula

Unit Percentage(%)

%100

1

1

×

××=

ttempERABSetupA

ucessERABSetupS

shAttemptionEstabliSigConnectS

shSuccessionEstabliSigConnectS

ionAttemptRRCConnect

ionSuccessRRCConnectCSSR

service

service


Counters For S1 Dedicated Signaling Setup

Page27

L.S1Sig.ConnEst.Att

L.S1Sig.ConnEst.Succ





Contents

2. KPI Details



2.3 Mobility KPIs

2.4 Equipment Related

2.5 Utilization KPIs / Traffic KPI

2.6 Transport Performance Counter

Page28


VoIP Call Drop Rate

Page29

KPI name VoIP call drop rate

Measurement scope

Cell/Cluster

Formula

Unit Percentage(%)

%100Re

Re_ ×=

leaseVoIPERAB

leasenormalVoIPERABABCDRVoIP





Service Drop Rate (All)

Page30

KPI name ERAB drop rate

Measurement scope

Cell/Cluster

Formula

Unit Percentage(%)

%100Re

Re_ ×=

leaseERAB

leasealERABABnormCDRService


E-RAB Release

� Normal release

� Released with the normal procedure, the statistic is based on each QCI

index

� Abnormal release

� Considered as service(call) drop, the statistic can be based on different

release cause and each QCI index

� Possible causes:

� EPC failure

� Radio link failure

� Handover failure

� Transport failure

� Network congestion

Page31





Abnormal Release

Page32

Figure 1 Figure 2

Figure 3 Figure 4

L.E-RAB.AbnormalRel.QCI.x







Normal Release

Page35

Figure 1

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





Contents

2. KPI Details



2.3 Mobility KPIs


2.5 Utilization/Availability KPIs / Traffic KPI

Page38


Intra/Inter-frequency Handover Out Success Rate

Page39

KPI name Intra/Inter-frequency Handover Out Success

Rate

Measurement scope

Cell/Cluster

Formula

Unit Percentage(%)

%100_ ×=

tOOutAttempIntraFreqH

sOOutSuccesIntraFreqHSROOutIntraFreqH

%100_ ×=

tOOutAttempInterFreqH

sOOutSuccesInterFreqHSROOutInterFreqH

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

admission failure





Associated Counters (Intra eNB)

Page40

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 after admission determination in target cell,


Associated Counters (Inter eNB)

X2 Based Handover

Page41

Handover Based on X2 interface

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

L.HHO.IntereNB.IntraFreq.ExecSuccOut

L.HHO.IntereNB.InterFreq.ExecSuccOut





Associated Counters (Inter eNB)

S1 based Handover

Page42

Handover Based on S1 interface

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

L.HHO.IntereNB.IntraFreq.ExecSuccOut

L.HHO.IntereNB.InterFreq.ExecSuccOut






Handover In Success Rate

Page44

KPI name Handover In Success Rate

Measurement scope Cell/Cluster

Formula

Unit Percentage(%)

%100_ ×=

tHOInAttemp

sHOInSuccesSRHOIn


Associated Counters (Intra eNB)

Page45

L.HHO.IntraeNB.ExecAttIn

L.HHO.IntraeNB.ExecSuccIn





Related Counters (Inter eNB)

X2 Handover

Page46

Handover Based on X2 interface

L.HHO.IntereNB.ExecAttIn

L.HHO.IntereNB.ExecSuccIn


Related Counters (Inter eNB)

S1 Handover

Page47

Handover Based on S1 interface

L.HHO.IntereNB.ExecAttIn

L.HHO.IntereNB.ExecSuccIn






Inter_RAT Handover Out Success Rate (LTE to WCDMA)

Page49

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

Measurement scope

Cell/Cluster

Formula

Unit Percentage(%)

%100_2_

_2__2_ ×=

AttemptWEIRATHO

SuccessWEIRATHOSRWEIRATHO





Associated Counters

Page50

L.IRATHO.E2W.ExecAttOut

L.IRATHO.E2W.ExecSuccOut


Inter_RAT Handover Out Success Rate (LTE to GSM)

Page51

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

Measurement scope

Cell/Cluster

Formula

Unit Percentage(%)

%100_2_

_2__2_ ×=

AttemptGEIRATHO

SuccessGEIRATHOSRGEIRATHO





Associated Counters

Page52

L.IRATHO.E2G.ExecAttOut

L.IRATHO.E2G.ExecSuccOut






Contents

2. KPI Details



2.3 Mobility KPIs


2.5 Utilization/Availability KPIs / Traffic KPI

Page54


Cell Downlink Average Throughput

Page55

KPI name Downlink Average Throughput

Measurement scope

Cell/Cluster

Formula

Unit bps

sferTimeCellDLTran

ficVolumeCellDLTrafhpCellDLAveT =





Related Counter - DL Traffic Volume

Page56

� 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 is

used as the value of the corresponding counter.


Related Counter – DL Transmission Time

Page57

� 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.


� 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 sampling

results is used as the value of the corresponding counter.





Cell Uplink Average Throughput

Page58

KPI name Downlink Average Throughput

Measurement scope

Cell/Cluster

Formula

Unit bps

sferTimeCellULTran

ficVolumeCellULTrafhpCellULAveT =


Related Counter - UL Traffic Volume

Page59

� 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.


� 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






Related Counter – UL Receiving Time

Page60

� 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.


� 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 is



Contents

2. KPI Details



2.3 Mobility KPIs


2.5 Utilization/Availability KPIs

Page61





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


Related Counters

Page63

Counter ID Counter name Description

1526727013VS.Board.CPUload.Max

Maximum Board CPU Usage

1526727014VS.Board.CPUload.

MeanAverage Board CPU Usage

1526728332VS.Board.CPULoad.CumulativeHighloadCount

Number of Times that the CPU Usage of Boards

Exceeds the Preconfigured Threshold





Resource Block Utilizing Rate

Page64

KPI name Resource Block Utilizing Rate

Measurement scope

Cell/Cluster

Formula

Unit Percentage(%)

%100_

__ DL ×=

DL

DL

AvailableRB

UsedRBURRB

%100_

__ UL ×=

UL

UL

AvailableRB

UsedRBURRB


Associated Counters

� Average number of used downlink PRBs

� Measurement 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.

Page65






Radio Network Unavailability Rate

Page67

KPI name Radio Network Unavailability Rate

Measurement scope

Radio network (Cluster)

Formula

SP:indicates the report period of counters in minute

Unit Percentage(%)

%10060*}{*

__ x=∑

SPTheTotalNumberOfCellsInCluser

CellUnavailTimeRateUnavailRAN





Contents

1. KPI Overview

2. Performance KPI

3. Driver test KPI

Page68


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

Page69





� KPI category in EUTRAN

� KPI introduction

� Counter details

Page70

Summary


Abbreviation

� ERAB: E-UTRAN Radio Access Bearer

� RRC: Radio Resource Control

� MRC: Maximum Ratio Combining

� PSIC: Parallel Soft Interference Cancellation

Page71




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