WCDMA UTRAN KPI
IntroductionIntroduction
KPI definitionKey performance indicator
KPI entityRNC level
Cell level
Clutter/region level (customized)
KPI analysis Network performance surveillance
Trouble shooting network problems
Network trend analysis
UTRAN KPI OverviewUTRAN KPI Overview
The UTRAN KPI can be divided into 5 catalogsAccessibility:UTRAN Call Setup
Retainability:UTRAN Call Drop
Mobility:UTRAN Mobility Management
Traffic:Resource and Traffic management
Algorithm: Radio Resource Management Algorithm Management
KPI
Accessibility Retainability Mobility Traffic Algorithm
ContentsContents
UTRAN Call Setup
UTRAN Call Drop
UTRAN Mobility Management
Traffic Management
Algorithm Management
UTRAN Call Setup UTRAN Call Setup
UTRAN Call Setup includes the RRC connection setup and the RAB
establish procedure. The Successful call setup involves the success
RRC and RAB setup. The main indicators are
RRC Setup Success Rate
RAB Setup Success Rate
RRC Setup CounterRRC Setup Counter
Measurement PointStat. 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
RRC Setup CounterRRC Setup Counter
RRC Setup KPI
RRC Connection Setup Success Rate = RRC Connection Setup complete / RRC
Connection Request
Main counter
RRC Connection Request
RRC Connection Setup
RRC Connection Reject
RRC Connection Setup complete
RRC Setup CounterRRC Setup Counter
Request cause counter
Originating conversational call
Terminating conversational call
Inter-RAT cell re-selection
Inter-RAT cell change order
Registration
……
Failure cause counter
RRC Reject
RRC setup no response
RAB Setup CounterRAB Setup Counter
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
RAB Setup CounterRAB Setup CounterRAB Setup KPI
CS RAB Success rate = CS RAB Setup Success/CS RAB Setup Request
PS RAB Success rate = PS RAB Setup Success/CS RAB Setup Request
Overall counter
CS RAB Setup Request
CS RAB Setup Success
CS RAB Setup Failure
PS RAB Setup Request
PS RAB Setup Success
PS RAB Setup Failure
Traffic class based counter
Conversational
Streaming
Interactive
Background
RAB setup counterRAB setup counter
Typical bearer based counterAMR speech
CS64kbps
PS64kbps
PS128kbps
PS384kbps
Failure cause counterInvalid parameters
Unavailable
Transport Layer failure
Other cause
ContentsContents
UTRAN Call Setup
UTRAN Call Drop
UTRAN Mobility Management
Traffic Management
Algorithm Management
Call Drop CounterCall Drop Counter
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
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
Call Drop CounterCall Drop Counter
Call Drop KPI
AMR Call Drop Rate = AMR Call Drop / AMR RAB Setup Success
VP Call Drop Rate = VP Call Drop / VP RAB Setup Success
PS Call Drop Rate = PS Call Drop / PS RAB Setup Success
Overall counter
CS call drop
PS call drop
Traffic class based counter
Conversational
Streaming
Interactive
Background
Call Drop CounterCall Drop Counter
Typical bearer based counter
AMR speech
CS64kbps
PS64Kbps
PS128Kbps
PS384Kbps
Call drop cause counter
RF loss
RLC reset
AAL2 failure
GTPU loss
Other cause
ContentsContents
UTRAN Call Setup
UTRAN Call Drop
UTRAN Mobility Management
Traffic Management
Algorithm Management
UTRAN Mobile Management UTRAN Mobile Management
The UTRAN Mobile Management focus on the KPIs of the handover procedures.
Soft handover
Hard handover
InterRAT handover
InterRAT cell change order
Cell update
SHO counterSHO counter
Measurement PointStat. Number of SHO request in Point B of Figure1
Stat. Number of SHO success in Point C of Figure1
Stat. Number of SHO failure in Point C of Figure2 and in Point C of Figure3
C
ACTIVE SET UPDATE
ACTIVE SET UPDATE COMPLETE
UE RNC
A
B
MEASUREMENT REPORT
F1: Successful SHO procedure F2: SHO failure procedure (activeset update failure) F3:SHO failure procedure (time out)
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
SHO counterSHO counter
Soft handover KPI
Soft HO Success rate=Soft HO success / Soft HO request
Softer HO Success rate=Softer HO success / Softer HO request
Overall counter
Soft HO request
Soft HO success
Softer HO request
Softer HO success
Typical Service based counter
AMR speech
CS64kbps
PS64kbps
PS128kbps
PS384kbps
SHO counterSHO counter
Failure cause counter
configuration unsupported
incompatible simultaneous reconfiguration
invalid configuration
No response
Other cause
SHO factor counter
(1 radio link, 2 radio links, 3 radio links) active set
SHO factor (based on radio link) = active set average link number -1
SHO factor (based on UE) = (2 radio links active set + 3 radio links active set) / (1
radio links active set + 2 radio links active set + 3 radio links active set)
HHO counterHHO counter
Measurement PointStat. Number of HHO request in Point B of Figure1
Stat. Number of HHO success in Point C of Figure1
Stat. Number of HHO failure in Point A of Figure2 and in Point A of Figure3
RADIO LINK SETUPREQUEST
UE NodeB RNC
RADIO LINK SETUPRESPONSE
A
B
PHYSICAL CHANNEL RECONFIGURATION
PHYSICAL CHANNELRECONFIGURATION COMPLETE
C
MEASUREMENT REPORT
F1: Successful HHO procedure F2: HHO failure (physical channel configuration failure) F3:HHO failure (time out)
UE RNC
A
PHYSICAL CHANNELRECONFIGURATION
PHYSICAL CHANNELRECONFIGURATION FAILURE
UE RNC
A
PHYSICAL CHANNELRECONFIGURATION
WAITING PHYSICAL CHANNELRECONFIGURATION TIME OUT
HHO counterHHO counter
HHO KPI
Intra-frequency HHO Success rate = Intra-frequency HHO success / Intra-
frequency HHO request
Inter-frequency HHO Success rate = Inter-frequency HHO success / Inter-
frequency HHO request
Overall counter
Intra-frequency HHO request
Intra-frequency HHO success
Intra-frequency HHO failure
Inter-frequency HHO request
Inter-frequency HHO success
Inter-frequency HHO failure
HHO counterHHO counter
Typical Service based counter
AMR speech
CS64kbps
PS64kbps
PS128kbps
PS384kbps
Failure cause counter
Configuration unsupported
Physical channel failure
Incompatible simultaneous reconfiguration
Cell update occurred
Invalid configuration
No response
Other cause
Inter-RAT Handover out counterInter-RAT Handover out counter
Measurement PointStat. Number of Handover outgoing prepare in Point A
Stat. Number of Handover outgoing prepare success in Point B
Stat. Number of Handover outgoing attempt in Point C
Stat. Number of Handover outgoing success in Point D
RELOCATIONREQUIRED
UE SRNC CN
HANDOVER FROMUTRAN COMMAND
RELOCATIONCOMMAND
IU RELEASECOMMAND
A
B
C
D
F1: Successful inter-RAT HO outgoing procedure
Inter-RAT handover out counterInter-RAT handover out counter
Inter-RAT handover KPI
Inter-RAT handover out prepare success rate = Handover outgoing prepare
success/Handover outgoing prepare
Handover outgoing success rate = Handover outgoing success/Handover
outgoing attempt
Overall counter
Handover outgoing prepare
Handover outgoing prepare success
Handover outgoing attempt
Handover outgoing success
Inter-RAT handover out counterInter-RAT handover out counter
Failure cause counter
Prepare failure
Relocation Failure in Target CN/RNC or Target System
TRELOCalloc Expiry
Relocation not supported in Target RNC or Target system
No Resource Available
Unknown Target RNC
No response
……
Handover failure
Configuration Unsupported
Physical Channel Failure
Unspecified
Relocation abort
No response
Other cause
Inter-RAT handover in counterInter-RAT handover in counter
Measurement Point
Stat. Number of Handover incoming request in Point A
Stat. Number of Handover incoming prepare success in Point B
Stat. Number of Handover incoming success in Point C
F1: Successful inter-RAT HO incoming procedure
RELOCATIONREQUEST
CN TRNC
A
HANDOVER TOUTRAN COMPLETE
RELOCATIONREQUEST
ACKNOWLEDGE
B
CRELOCATIONCOMPLETE
D
NodeB UE
RADIO LINKRESTORE
INDICATION
Inter-RAT handover in counterInter-RAT handover in counter
Inter-RAT handover in KPI
Handover in prepare success rate = Handover incoming prepare
success/Handover incoming request
Handover in success rate = Handover incoming success/Handover incoming
request
Overall counter
Handover incoming request
Handover incoming prepare success
Handover incoming success
Inter-RAT handover in counterInter-RAT handover in counter
Failure cause
Prepare failure
No Resource Available
Relocation Failure in Target CN/RNC or Target System
Relocation not supported in Target RNC or Target system
Relocation abort
Other cause
Handover failure
Relocation abort
No response
Other cause
Inter-RAT cell change counterInter-RAT cell change counter
Measurement Point
Stat. Number of cell change outgoing request in Point B of Figure1 and Point A
of Figure2
Stat. Number of cell change outgoing success in Point D of Figure1 and Point B
of Figure2UE SRNC CN
CELL CHANGEORDER FROM
UTRAN
IU RELEASECOMMAND
A
B
C
MEASUREMENTREPORT
IU RELEASECOMPLETE
D
F1: UTRAN-controlled cell change outgoing procedure F2: UE-controlled cell change outgoing procedure
A SRNS CONTEXT RESPONS
SRNS CONTEXT REQUESTSRNC CN
IU RELEASE COMMAND
IU RELEASE COMPLETEB
Inter-RAT cell change counterInter-RAT cell change counter
Inter-RAT cell change KPI
Success rate = Cell change success / Cell change outgoing request
Overall counter
Cell change outgoing request
Cell change outgoing success
Typical bearer based counter
PS64kbps
PS128kbps
PS384kbps
Failure cause counter
Configuration unacceptable
Physical Channel Failure
Unspecified
No response
Other
Cell update counterCell update counter
Measurement Point
Stat. Number of cell update request in Point A
Stat. Number of cell update success in Point B in case1 or case2
Stat. Number of cell update success in Point C in case3
Case1:the UE camps on the same cells and keeps in CELL_PCH state before and after cell update
Case2:the UE camps on the same cells and keeps in CELL_FACH state before and after cell update,
also the update cause is not cell reselection
Case3: all cases except case1 and case2
B
CELL UPDATE
CELL UPDATE CONFIRM
UE RNC
PHYSICAL CHANNEL RECONFIGURATIO
C
A
F1: cell update procedure
Cell update counterCell update counter
Cell update KPI
Cell update success rate = Cell update success/Cell update request
Overall Counter
Cell update request
Cell update success
Cell update cause counter
Cell reselection
Periodical cell update
Uplink data transmission
Paging response
Re-entered service area
Radio link failure
RLC unrecoverable error
ContentsContents
UTRAN Call Setup
UTRAN Call Drop
UTRAN Mobility Management
Traffic Management
Algorithm Management
Traffic CounterTraffic Counter
User number
RRC state based user number
Cell DCH, Cell FACH, Cell PCH, URA PCH
Traffic class based equivalent user
Conversational
Streaming
Interactive and background
Cell throughput
Directional counter
Cell uplink throughput
Cell downlink throughput
Traffic class based counter
Conversational, streaming, interactive, background
All supported bandwidth
Traffic CounterTraffic Counter
Iub bandwidth utilization
Common channel (RACH, FACH, PCH) volume
Traffic class based service volume
Uplink and downlink volume
OVSF code utilization
SF based
SF=4
SF=8
……
SF=512
RTWP and Carrier Power
Cell RTWP
Transmission Carrier Power
ContentsContents
UTRAN Call Setup
UTRAN Call Drop
UTRAN Mobility Management
Traffic Management
Algorithm Management
Algorithm CounterAlgorithm Counter
DCCC
Overall counter
Channel switch request
Channel switch success
DCH<->DCH channel switch counter
Channel switch success (DL Bit Rate upgrade )
Channel switch success (DL Bit Rate degrade )
DCH<->FACH/RACH channel switch counter
Channel switch success (To common channel)
Channel switch success (From common channel)
AMRC
Uplink AMR control counter (degrade)
Downlink AMR control counter (upgrade)
CAC
UL Admission deny counter
DL Admission deny counter
Appendix: Nastar KPI Analysis RoutineAppendix: Nastar KPI Analysis Routine
Define monitor area: RNC group or cell group
Query Performance Item
Query Top N cell list
Query related item
Import raw data
Define cluster
Select Issue
Find out trouble cause
Raw counter Analysis
Select performance analysis issue
Query metric item, find the fault or trouble
Query TopN cell list in pre-defined cluster, find the worst cell or cell group
Query related metric item in the specified worst cells
Query and find out the fault or trouble cause
Analyze raw counter if necessary
Import performance counter from NE M2000
Step1: Check RRC metric item by “RRC setup analysis” issue
RRC Setup Rate islower
Appendix: Nastar KPI Analysis Example
Step2: Find the worst TopN cell list in former cluster by “Forward”
Appendix: Nastar KPI Analysis Example
Step3: Find the worst cell in TopN list
Appendix: Nastar KPI Analysis Example
Step4: Query RRC reject cause in specified cell by “Forward”
Appendix: Nastar KPI Analysis Example
Step5: Find the RRC reject cause in the worst cell
Appendix: Nastar KPI Analysis Example
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