02 WCDMA KPI
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Transcript of 02 WCDMA KPI
HUAWEI TECHNOLOGIES CO., LTD.
www.huawei.com
HUAWEI Confidential
Security Level:
WCDMA KPI Introduction
HUAWEI TECHNOLOGIES CO., LTD. Page 2HUAWEI Confidential
Foreword
Key performance indicators (KPIs) are a set of selected indicators used for measuring the current network performance and trends
KPIs highlight the key factors of network monitoring and warn in time of potential problems
KPIs are also used to prioritize the corrective actions
HUAWEI TECHNOLOGIES CO., LTD. Page 3HUAWEI Confidential
Objectives
Upon completion of this course, you will be able to:
Describe the definitions of KPI
List the important KPIs and their benchmarks
HUAWEI TECHNOLOGIES CO., LTD. Page 4HUAWEI Confidential
Contents
1. Accessibility KPIs
2. Retainability KPIs
3. Mobility KPIs
4. Other Available KPIs
HUAWEI TECHNOLOGIES CO., LTD. Page 5HUAWEI Confidential
Accessibility KPI
UTRAN Call Setup mainly includes
RRC connection setup
RAB establish procedure
Call setup success rate includes
Radio Access Success Rate
RRC Setup Success Rate
RAB Setup Success Rate
HUAWEI TECHNOLOGIES CO., LTD. Page 6HUAWEI Confidential
Measurement Point
Stat. Number of RRC Connection Request in Point A1 of Figure1
Stat. Number of RRC Connection Setup in Point B of Figure1
Stat. Number of RRC Connection Setup complete in Point C of Figure1
Stat. Number of RRC Connection Reject in point A of Figure2
A1
B
A2
C
RRC CONNECTION REQUEST
RRC CONNECTION SETUP COMPLETE
RRC CONNECTION SETUP
UE RNC
A
RRC CONNECTION REQUEST
RRC CONNECTION REJECT
UE RNC
F1:successful RRC connection setup procedure F2: RRC connection reject procedure
Accessibility KPI - RRC connection setup
HUAWEI TECHNOLOGIES CO., LTD. Page 7HUAWEI Confidential
Formula of RRC Setup Success Rate
For service
For other
Main counter
RRC Connection Request
RRC Connection Setup
RRC Connection Setup complete
%100_ Service ×=service
service
ionAttemptRRCConnectionSuccessRRCConnectSRRRCS
%100_ other ×=other
other
ionAttemptRRCConnectionSuccessRRCConnectSRRRCS
Accessibility KPI - RRC connection setup
HUAWEI TECHNOLOGIES CO., LTD. Page 8HUAWEI Confidential
Accessibility KPI - RRC connection setup
RRC connection reject causes
Power Congestion
RL Fail
AAL2 Fail
FP Fail
CE Congestion
Code Congestion
HUAWEI TECHNOLOGIES CO., LTD. Page 9HUAWEI Confidential
Measurement Point
Stat. Number of RAB Setup Request in Point A of Figure1
Stat. Number of RAB Setup Success in Point B of Figure1
Stat. Number of RAB Setup Failure in Point B of Figure2
RAB ASSIGNMENTREQUEST
UE RNC CN
A
B
RADIO BEARERSETUP
RADIO BEARERSETUP COMPLETE
RAB ASSIGNMENTRESPONSE
RAB ASSIGNMENTREQUEST
UE RNC CN
A
B
RADIO BEARERSETUP
RADIO BEARERSETUP FAILURE
RAB ASSIGNMENTRESPONSE
F1: Successful RAB setup procedure F2: RAB setup failure procedure
Accessibility KPI - RAB setup
HUAWEI TECHNOLOGIES CO., LTD. Page 10HUAWEI Confidential
CS RAB Setup Success Ratio
Calculation formula :
Description
− This value can be divided into voice service and VP service
PS RAB Setup Success Ratio
Calculation formula :
Description:
− This KPI can be used to evaluate the RAB setup success ratio of all PS
service in one RNC
Accessibility KPI - RAB setup
%100_ ×=AttemptCSRABSetupSuccessCSRABSetupSRCSRABS
%100_ ×=AttemptPSRABSetupSuccessPSRABSetupSRPSRAB
HUAWEI TECHNOLOGIES CO., LTD. Page 11HUAWEI Confidential
Accessibility KPI - RAB setup
Radio Access Success Rate
Calculation formula
Description
− A complete call setup procedure contains the RRC, Direct
Transfer procedure and RAB.
− This KPI can be used to evaluate the radio access success ratio
in one RNC
%100)(__ Service ××=AttePSRABSetupAttCSRABSetupSucPSRABSetupSucCSRABSetupSRRRCSSRRA
+
+
HUAWEI TECHNOLOGIES CO., LTD. Page 12HUAWEI Confidential
Accessibility KPI - RAB setup
RAB establishment failure causes
POWER_CONG_CELL: No enough power
TNL_CELL: No enough transmission resource
CE_CONG_CELL: No enough CE
CODE_CONG_CELL: No enough OVSF code
UNSUP_CELL: QoS not support or admission failure
PARAM_CELL: CN signaling illegal
CONG_CELL: RNC problem
OTHER_CELL
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Contents
1. Accessibility KPIs
2. Retainability KPIs
3. Mobility KPIs
4. Other Available KPIs
HUAWEI TECHNOLOGIES CO., LTD. Page 14HUAWEI Confidential
A
RNC CN
RAB RELEASE REQUEST
F1: RAB release request procedure F2: Iu connection release request procedure
A
IU RELEASE COMMAND
IU RELEASE COMPLETE
RNC CN
IU RELEASE REQUEST
Retainability KPI
Measurement Point
Stat. Number of Call Drop in Point A of Figure1 and in Point A of Figure2
Definition of Call Drop : Abnormal RAB release triggered by RNC
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Retainability KPI
CS Service Drop Ratio
Calculation formula:
Description:
− This KPI can be used to evaluate the call drop ratio of CS service in one
RNC.
− The call drops will happen due to RNC abnormal release trigged by RAB
RELEASE REQUEST or IU RELEASE REQUEST messages
− AMR service drop ratio and VP service drop ration can represent the
problems in details if possible
%100Re_ ×=SuccessCSRABSetup
leasemalCSRABAbnorCDRCS
HUAWEI TECHNOLOGIES CO., LTD. Page 16HUAWEI Confidential
Retainability KPI
PS Service Drop Ratio
Calculation formula:
Description:
− This KPI can be used to evaluate the call drop ratio of all PS service in
one RNC
− The call drops happened due to RNC abnormal release trigged by RAB
RELEASE REQUEST or IU RELEASE REQUEST messages
%100Re_ ×=SuccessPSRABSetup
leasemalPSRABAbnorCDRPS
HUAWEI TECHNOLOGIES CO., LTD. Page 17HUAWEI Confidential
Retainability KPI
Call drop cause
RF cause
− Uplink synchronization failure
− No reply
− Signaling RLC reset
Abnormal cause
− RAB preempted
− UTRAN generated reason
− CELL congestion
− OM intervention
− Iu interface AAL2 link abnormity
HUAWEI TECHNOLOGIES CO., LTD. Page 18HUAWEI Confidential
Contents
1. Accessibility KPIs
2. Retainability KPIs
3. Mobility KPIs
4. Other Available KPIs
HUAWEI TECHNOLOGIES CO., LTD. Page 19HUAWEI Confidential
Mobility KPI
Soft Handover Success Ratio
Measurement Point:
C
ACTIVE SET UPDATE
ACTIVE SET UPDATE COMPLETE
UE RNC
A
B
MEASUREMENT REPORT
F1: Successful SHO procedure F2: SHO failure procedure F3:SHO failure procedure
C
ACTIVE SET UPDATE
ACTIVE SET UPDATE FAILURE
UE RNC
A
B
MEASUREMENT REPORT
C
ACTIVE SET UPDATE
WAITING ACTIVE SET UPDATE COMPLETE TIME OUT
UE RNC
A
B
MEASUREMENT REPORT
HUAWEI TECHNOLOGIES CO., LTD. Page 20HUAWEI Confidential
Mobility KPI
Soft Handover Success Ratio
Calculation formula:
Description:
− This KPI can be used to evaluate the soft handover success ratio in one RNC,
which includes softer handover
− This SHO events contain 1A, 1B and 1C
Softer Handover Success Ratio
Calculation formula:
Description:
− This KPI can be used to evaluate the softer handover success ratio in one RNC
− This SHO events contain 1A, 1B and 1C
%100_ ×=temptetUpdateAtSHOActiveSccessetUpdateSuSHOActiveSSRSHO
%100_ ×=ateAttempttiveSetUpdSofterHOAcateSuccesstiveSetUpdSofterHOAcSRSoHO
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Mobility KPI
SHO failure causes
SHO_RL_ADD_FAIL_NO_RSP: Coverage reason
SHO_RL_DEL_FAIL_NO_RSP : Coverage reason
SHO_PREP_RL_SETUP_FAIL: No enough power
SHO_PREP_AAL2_SETUP_FAIL: No enough transmission resource
SHO_PREP_FP_SYNC_FAIL: Transmission unstable
SHO_PREP_ FAIL_OTHER_CELL
HUAWEI TECHNOLOGIES CO., LTD. Page 22HUAWEI Confidential
Mobility KPI
Inter-frequency Hard Handover Success Ratio
Measurement points
RADIO LINK SETUPREQUEST
UE NodeB (old) RNC
RADIO LINK SETUPRESPONSE
A
BPHYSICAL CHANNEL RECONFIGURATION
PHYSICAL CHANNELRECONFIGURATION COMPLETE C
MEASUREMENT REPORT(2D Event)
Compress mode
NodeB (new)
PHYSICAL CHANNEL
MEASUREMENT Control(2D Event)
MEASUREMENT REPORT (several)
HUAWEI TECHNOLOGIES CO., LTD. Page 23HUAWEI Confidential
Mobility KPI
Inter-frequency Hard Handover Success Ratio
Calculation formula:
Description:
− This KPI can be used to evaluate the inter-frequency hard handover
success ratio in one RNC
%100_ ×=temptInterHHOAtccessInterHHOSuSRInterHHO
HUAWEI TECHNOLOGIES CO., LTD. Page 24HUAWEI Confidential
Mobility KPI
Intra-frequency Hard Handover Success Ratio
Intra-frequency Hard Handover signaling procedure
RADIO LINK SETUPREQUEST
UE NodeB (new) RNC
RADIO LINK SETUPRESPONSE
A
B
PHYSICAL CHANNEL RECONFIGURATION
PHYSICAL CHANNELRECONFIGURATION COMPLETE
C
MEASUREMENT REPORT (1D Event)
HUAWEI TECHNOLOGIES CO., LTD. Page 25HUAWEI Confidential
Mobility KPI
Intra-frequency Hard Handover Success Ratio
Calculation formula:
Description:
− This KPI can be used to evaluate the intra-frequency hard handover
success ratio in one RNC
− These counters do not contain RAT hard handover
%100_ ×−−
=temptInterHHOAtHHOAttemptccessInterHHOSuHHOSuccessSRIntraHHO
HUAWEI TECHNOLOGIES CO., LTD. Page 26HUAWEI Confidential
Mobility KPI
CS Inter-RAT Handover Success Ratio (WCDMA to GSM)
Inter-RAT Handover measurement counter:
− Handover outgoing attempt in Point C
− Handover outgoing success in Point D
RELOCATIONREQUIRED
UE SRNC CN
HANDOVER FROMUTRAN COMMAND
RELOCATIONCOMMAND
IU RELEASECOMMAND
A
B
C
D
HUAWEI TECHNOLOGIES CO., LTD. Page 27HUAWEI Confidential
Mobility KPI
CS Inter-RAT Handover Success Ratio (WCDMA to GSM)
Calculation formula:
Description:
− This KPI can be used to evaluate the CS inter-RAT handover success
ratio in one RNC
%100_ ×=HOAttemptCSInterRATHOSuccessCSInterRATSRHOCSInterRAT
HUAWEI TECHNOLOGIES CO., LTD. Page 28HUAWEI Confidential
Mobility KPI
PS Inter-RAT Handover Success Ratio (WCDMA to GPRS)
Calculation formula:
Description:
− This KPI can be used to evaluate the PS inter-RAT handover success
ratio in one RNC
%100_ ×=utHOAttemptOPSInterRATutHOSuccessOPSInterRATSRHOPSInterRAT out
HUAWEI TECHNOLOGIES CO., LTD. Page 29HUAWEI Confidential
Mobility KPI
PS Inter-RAT Handover Success Ratio (GPRS to WCDMA)
Calculation formula:
Description:
− This KPI can be used to evaluate the PS inter-RAT handover success
ratio in one RNC
%100_ ×=nHOAttemptIPSInterRATnHOSuccessIPSInterRATSRHOPSInterRAT in
HUAWEI TECHNOLOGIES CO., LTD. Page 30HUAWEI Confidential
Contents
1. Accessibility KPIs
2. Retainability KPIs
3. Mobility KPIs
4. Other Available KPIs
HUAWEI TECHNOLOGIES CO., LTD. Page 31HUAWEI Confidential
Other Available KPI
Traffic Counter
AMR Erlang
Cell throughput
− PS UL or DL traffic
− Based on traffic class: Streaming, Interactive and background
Iub bandwidth utilization
OVSF code utilization
RTWP (UL capacity) and Carrier Power (DL capacity)
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Other Available KPI
VIP cells performance
The following items should be taken more consideration
− RRC setup success rate
− RTWP value
− Transmission power
− Call drop rate
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Other Available KPI
Worst Cell Ratio (WCR)
Calculation formula:
Description:
− A1 is AMR RAB Setup Success Ratio, A2 is VP RAB Setup Success Ratio
− B1 is AMR Call Drop Ratio, B2 is VP Call Drop Ratio
− 95% and 3% are referred by the experience from commercial network while
the traffic with AMR voice and video phone is bigger than 0.1 Erlang
− This KPI can be used to evaluate the effect of cells with poor call drop rate or call setup success rate to the deteriorating of network performance in one RNC
%100%)321(%)9521( ,×
><=
sInRNCmberOfCellTheTotalNuandBBorandAAwhichfCellsTheNumberOWCR
HUAWEI TECHNOLOGIES CO., LTD. Page 34HUAWEI Confidential
Other Available KPI
UL Interference Cell Ratio
Calculation formula:
Notes:
− -98dBm is referred by the experience from commercial network
− In KPI reports, UL interference level should be given by cells ID
Description:
− This KPI can be used to evaluate how serious the UL capacity is
limited by the UL interference of all cells in one RNC
%10098 ,×
−>=
sInRNCmberOfCellTheTotalNudBmMeanRTWPWhichfCellsTheNumberOULICR
HUAWEI TECHNOLOGIES CO., LTD. Page 35HUAWEI Confidential
Other Available KPI
Soft Handover Ratio
Calculation formula:
where A is number of UE with 1 RL, B is number of UE with 2 RLs, and C is number of UE with 3 RLs
Description:
− This KPI can be used to evaluate the consumption to network
resources due to soft handover in one RNC
− The benchmark can be different with the different network stage
%1001111
312111×⎟⎠⎞
⎜⎝⎛ −
++×+×+×
=CBA
CBASHR
HUAWEI TECHNOLOGIES CO., LTD. Page 36HUAWEI Confidential
Summary
KPI Categories KPI
RRC Setup Success RateAccess success rate
RAB Setup Success Rate
Voice Call Drop Rate
VP Call Drop Rate
PS Call Drop Rate
Soft Handover Success Rate
Inter-Frequency HO Success Rate
CS InterRAT HO Success Rate
PS InterRAT HO Success Rate
Cell Update Success Rate
Equivalent User
Cell Throughput
Cell Resource Allocation
Traffic volume
Mobility management
Call drop rate
HUAWEI TECHNOLOGIES CO., LTD. Page 37HUAWEI Confidential
KPI Values
CS User Based on Equivalent User 15.34(11:00 ~ 12:00)
PS User Based on Equivalent User 92.47(15:00 ~ 16:00)
RRC)(>95%) 98.97%(9396/9494)
RRC Connection Setup Success Rate (other)(>95%) 96.02%(39688/41334)
AMR RAB Assignment Success Rate(>95%) 99.73%(4726/4739)
Video Call RAB Assignment Success Rate(>95%) 99.24%(130/131)
PS RAB Assignment Success Rate(>95%) 99.12%(3148/3176)
RB Setup Success Rate(>95%) 99.74%(8004/8025)
Access
Traffic
Daily reportDaily report
Example
HUAWEI TECHNOLOGIES CO., LTD. Page 38HUAWEI Confidential
KPI Values
Soft Handover Success Rate(>98%) 99.88%(123452/123595)
Softer Handover Success Rate(>98%) 99.91%(18522/18538)
Soft Handover Factor based on Radio Link Number(<40%)
48.21%
Inter-Freq Hard Handover Success Rate(>85%) 99.29%(139/140)
CS Inter-RAT Handover Success Rate( from UTRAN to GSM)(>85%)
100.00%(53/53)
PS Inter-RAT Handover Success Rate( from UTRAN to GSM)(>85%)
83.33%(5/6)
CS AMR Call Drop Rate(<1.5%) 1.54%(73/4726)
Video Call Drop Rate(<1.5%) 0.77%(1/130)
PS Service Drop Rate(<30%) 2.13%(67/3148)
CDR
HO
Daily reportDaily report
Example
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