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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
8/11/2019 LTE eRAN6.0 KPI Introduction.pptx
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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 Accessibility KPI
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
Page12
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 Accessibility KPI
2.1.1 RRC Success Rate
2.2.2 E-RAB Success Rate
2.2.3 Call Setup 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)
Page19
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)
Page20
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 Accessibility KPI
2.1.1 RRC Setup Success Rate
2.2.2 E-RAB Success Rate
2.2.3 Call Setup 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
2.1 Accessibility KPI
2.2 Retainability KPIs
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
2.2 Retainability KPIs
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
Page59
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
2.2 Retainability KPIs
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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