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WCDMA UTRAN KPI
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IntroductionIntroduction
z KPI definit ion
Key performance indicator
z KPI enti ty
RNC level Cell level
Clutter/region level (customized)
z KPI analysis
Network performance surveillance
Trouble shooting network problems
Network trend analysis
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UTRAN KPI OverviewUTRAN KPI Overview
z The UTRAN KPI can be divided into 5 catalogs
AccessibilityUTRAN Call Setup
RetainabilityUTRAN Call Drop
MobilityUTRAN Mobility Management
TrafficResource and Traffic management
Algorithm Radio Resource Management Algorithm Management
KPI
Accessib il ity Retainability Mobility Traffic Algori thm
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ContentsContents
UTRAN Call Setup
UTRAN Call Drop
UTRAN Mobil ity Management
Traffic Management
Algorithm Management
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UTRAN Call SetupUTRAN Call Setup
z 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
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RRC Setup CounterRRC Setup Counter
z 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 CONNECTIONREQUEST
RRC CONNECTIONSETUP COMPLETE
RRC CONNECTIONSETUP
UE RNC
A
RRC CONNECTION REQUEST
RRC CONNECTIONREJECT
UE RNC
F1:successful RRC connection setup procedure F2: RRC connection reject procedure
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RRC Setup CounterRRC Setup Counter
z RRC Setup KPI
RRC Connection Setup Success Rate = RRC Connection Setup complete / RRC
Connection Request
z Main counter RRC Connection Request
RRC Connection Setup
RRC Connection Reject
RRC Connection Setup complete
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RRC Setup CounterRRC Setup Counter
z Request cause counter
Originating conversational call
Terminating conversational call
Inter-RAT cell re-selection Inter-RAT cell change order
Registration
z Failure cause counter
RRC Reject
RRC setup no response
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RAB Setup CounterRAB Setup Counter
z 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 ASSIGNMENT
REQUEST
UE RNC CN
A
B
RADIO BEARERSETUP
RADIO BEARER
SETUP COMPLETE
RAB ASSIGNMENTRESPONSE
RAB ASSIGNMENT
REQUEST
UE RNC CN
A
B
RADIO BEARERSETUP
RADIO BEARERSETUP FAILURE
RAB ASSIGNMENT
RESPONSE
F1: Successful RAB setup procedure F2: RAB setup failure procedure
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RAB Setup CounterRAB Setup Counter
z
RAB 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
z 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
z Traffic class based counter
Conversational
Streaming
Interactive
Background
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RAB setup counterRAB setup counter
z Typical bearer based counter
AMR speech
CS64kbps
PS64kbps
PS128kbps
PS384kbps
z Failure cause counter
Invalid parameters
Unavailable
Transport Layer failure
Other cause
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ContentsContents
UTRAN Call Setup
UTRAN Call Drop
UTRAN Mobil ity Management
Traffic Management
Algorithm Management
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Call Drop CounterCall Drop Counter
z 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 REQUES
F1: RAB release request procedure F2: Iu connection release request procedure
A
IURELEASE COMMAND
IU RELEASE COMPLETE
RNC CN
IU RELEASE REQUEST
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Call Drop CounterCall Drop Counter
z 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
z Overall counter
CS call drop
PS call drop
z Traffic class based counter
Conversational
Streaming
Interactive
Background
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Call Drop CounterCall Drop Counter
z Typical bearer based counter
AMR speech
CS64kbps
PS64Kbps PS128Kbps
PS384Kbps
z Call drop cause counter
RF loss
RLC reset
AAL2 failure
GTPU loss
Other cause
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ContentsContents
UTRAN Call Setup
UTRAN Call Drop
UTRAN Mobil ity Management
Traffic Management
Algorithm Management
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UTRAN Mobile ManagementUTRAN Mobile Management
z The UTRAN Mobile Management focus on the KPIs of the handover
procedures.
Soft handover
Hard handover InterRAT handover
InterRAT cell change order
Cell update
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SHO counterSHO counter
z Measurement Point
Stat. 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
z F1: Successful SHO procedure F2: SHO failure procedure (activesetupdate 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 UPDATECOMPLETE TIME OUT
UE RNC
A
B
MEASUREMENT REPORT
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SHO counterSHO counter
z Soft handover KPI
Soft HO Success rate=Soft HO success / Soft HO request
Softer HO Success rate=Softer HO success / Softer HO request
z Overall counter Soft HO request
Soft HO success
Softer HO request
Softer HO success
z Typical Service based counter
AMR speech
CS64kbps
PS64kbps
PS128kbps
PS384kbps
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SHO counterSHO counter
z Failure cause counter
configuration unsupported
incompatible simultaneous reconfiguration
invalid configuration No response
Other cause
z 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)
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HHO counterHHO counter
z Measurement Point
Stat. 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 SETUP
REQUEST
UE NodeB RNC
RADIO LINK SETUPRESPONSE
A
B
PHYSICAL CHANNEL RECONFIGURATION
PHYSICAL CHANNELRECONFIGURATION COMPLETE
C
MEASUREMENT REPORT
z 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
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HHO counterHHO counter
z 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
z 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
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HHO counterHHO counter
z Typical Service based counter
AMR speech
CS64kbps
PS64kbps
PS128kbps
PS384kbps
z Failure cause counter
Configuration unsupported
Physical channel failure
Incompatible simultaneous reconfiguration
Cell update occurred
Invalid configuration
No response
Other cause
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Inter-RAT Handover out counterInter-RAT Handover out counter
z Measurement Point
Stat. 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
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Inter-RAT handover out counterInter-RAT handover out counter
z 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
z Overall counter
Handover outgoing prepare
Handover outgoing prepare success
Handover outgoing attempt
Handover outgoing success
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Inter-RAT handover out counterInter-RAT handover out counter
z Failure cause counter
Prepare failure
9 Relocation Failure in Target CN/RNC or Target System
9 TRELOCalloc Expiry
9 Relocation not supported in Target RNC or Target system
9 No Resource Available
9 Unknown Target RNC
9 No response
9
Handover failure
9 Configuration Unsupported
9Physical Channel Failure
9 Unspecified
9 Relocation abort
9 No response
9 Other cause
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Inter-RAT handover in counterInter-RAT handover in counter
z 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
RELOCATION
REQUESTACKNOWLEDGE
B
CRELOCATION
COMPLETE
D
NodeB UE
RADIO LINKRESTORE
INDICATION
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Inter-RAT handover in counterInter-RAT handover in counter
z 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
z Overall counter
Handover incoming request
Handover incoming prepare success
Handover incoming success
I RAT h d i
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Inter-RAT handover in counterInter-RAT handover in counter
z Failure cause Prepare failure
9 No Resource Available
9 Relocation Failure in Target CN/RNC or Target System
9 Relocation not supported in Target RNC or Target system
9 Relocation abort
9 Other cause
Handover failure
9 Relocation abort
9 No response
9 Other cause
I RAT ll hI t RAT ll h t
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Inter-RAT cell change counterInter-RAT cell change counter
z 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 Figure2
UE SRNC CN
CELL C HANGEORDER 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 RESPON
SRNS CONTEXT REQUES
SRNC CN
IU RELEASE COMMAND
IU RELEASE COMPLETEB
Inter-RAT cell change counterInter-RAT cell change counter
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Inter-RAT cell change counterInter-RAT cell change counter
z Inter-RAT cell change KPI
Success rate = Cell change success / Cell change outgoing request
z Overall counter
Cell change outgoing request Cell change outgoing success
z Typical bearer based counter
PS64kbps
PS128kbps
PS384kbps
z Failure cause counter
Configuration unacceptable
Physical Channel Failure
Unspecified
No response
Other
C ll d t tC ll d t t
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Cell update counterCell update counter
z 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
C ll d t tCell update counter
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Cell update counterCell update counter
z Cell update KPI
Cell update success rate = Cell update success/Cell update request
z Overall Counter
Cell update request Cell update success
z 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
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ContentsContents
UTRAN Call Setup
UTRAN Call Drop
UTRAN Mobil ity Management
Traffic Management
Algorithm Management
Traffic CounterTraffic Counter
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Traffic CounterTraffic Counter
z User number
RRC state based user number
9 Cell DCH, Cell FACH, Cell PCH, URA PCH
Traffic class based equivalent user
9 Conversational
9 Streaming
9 Interactive and background
z Cell throughput Directional counter
9 Cell uplink throughput
9 Cell downlink throughput
Traffic class based counter
9 Conversational, streaming, interactive, background
All supported bandwidth
Traffic CounterTraffic Counter
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Traffic CounterTraffic Counter
z Iub bandwidth utilization
Common channel (RACH, FACH, PCH) volume
Traffic class based service volume
Uplink and downlink volume
z OVSF code utilization
SF based
9 SF=4
9 SF=8
9
9 SF=512
z RTWP and Carrier Power
Cell RTWP
Transmission Carrier Power
ContentsContents
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ContentsContents
UTRAN Call Setup
UTRAN Call Drop
UTRAN Mobil ity Management
Traffic Management
Algorithm Management
Algorithm CounterAlgorithm Counter
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Algorithm CounterAlgorithm Counter
z DCCC Overall counter
9 Channel switch request
9 Channel switch success
DCHDCH channel switch counter
9 Channel switch success (DL Bit Rate upgrade )
9 Channel switch success (DL Bit Rate degrade )
DCHFACH/RACH channel switch counter
9 Channel switch success (To common channel)
9 Channel switch success (From common channel)
z AMRC
Uplink AMR control counter (degrade)
Downlink AMR control counter (upgrade)
z CAC
UL Admission deny counter
DL Admission deny counter
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Appendix: Nastar KPI Analysis RoutineAppendix: Nastar KPI Analysis Routine
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pp ypp y
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
Appendix: Nastar KPI Analysis Example
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z Step1: Check RRC metric item by RRC setup analysis issue
RRC SetupRate is
lower
Appendix: Nastar KPI Analysis Example
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z Step2: Find the worst TopN cell list in former cluster by Forward
Appendix: Nastar KPI Analysis Example
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z Step3: Find the worst cell in TopN list
Appendix: Nastar KPI Analysis Example
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z Step4: Query RRC reject cause in specified cell by Forward
Appendix: Nastar KPI Analysis Example
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z Step5: Find the RRC reject cause in the worst cell
Top Related