HUAWEI TECHNOLOGIES CO., LTD. www.huawei.com HUAWEI Confidential Security Level: WCDMA Call Drop Counter System and KPI ISSUE 1.0
HUAWEI TECHNOLOGIES CO., LTD.
www.huawei.com
HUAWEI Confidential
Security Level:
WCDMA Call Drop Counter System and KPI
ISSUE 1.0
HUAWEI TECHNOLOGIES CO., LTD. Page 2HUAWEI Confidential
� Call drop is an very important index for evaluating network performance.
� Call drop can be calculated based on different cells and RNC for different services
HUAWEI TECHNOLOGIES CO., LTD. Page 3HUAWEI Confidential
� Upon completion of this course, you will be able to:
� Describe call drop counter system
� Know the call drop KPI
HUAWEI TECHNOLOGIES CO., LTD. Page 4HUAWEI Confidential
Preface
� Call Drop Rate Signaling Procedure
� After RAB is setup successfully, Iu release command is sent by CN due to Iu release
request or RAB release request from RNC. And the corresponding reasons are not:
− Successful Relocation
− User Inactivity
− Normal Release
Figure 1 Figure 2
HUAWEI TECHNOLOGIES CO., LTD. Page 5HUAWEI Confidential
Chapter 1 RNC Call Drop Counter system and KPI Chapter 1 RNC Call Drop Counter system and KPI
Chapter 2 Cell Call Drop Counter system and KPI Chapter 2 Cell Call Drop Counter system and KPI
HUAWEI TECHNOLOGIES CO., LTD. Page 6HUAWEI Confidential
RNC Call Drop Counters System� RAB.RelAbnormal.RNC
� CS
− Based on QoS: Conversational & Streaming
− Based on Services: AMR & CS64K
− Based abnormal reasons:
▪ RAB preempted
▪ UTRAN generated reason
▪ OM intervention
▪ Iu interface AAL2 link abnormity
▪ UE Signaling Connection Release
▪ CELL congestion
− Based on RF reasons:
▪ Failure in the Radio Interface Procedure
▪ signalling RLC reset
− Normal release
HUAWEI TECHNOLOGIES CO., LTD. Page 7HUAWEI Confidential
RNC Call Drop Counters System� RAB.RelAbnormal.RNC
� PS
− Based on QoS: Conversational, Streaming, Interactive & Background
− Based on Services: PS 64K, PS 128K & PS 384K
− Based abnormal reasons:
▪ RAB preempted
▪ UTRAN generated reason
▪ OM intervention
▪ GTPU abnormity
▪ UE Signaling Connection Release
▪ CELL congestion
− Based on RF reasons:
▪ Failure in the Radio Interface Procedure
▪ signalling RLC reset
▪ Traffic RLC reset
− Normal release
HUAWEI TECHNOLOGIES CO., LTD. Page 8HUAWEI Confidential
RNC Call Drop Counters System
� RAB Release (RNC)
� CS
− Due to RF: VS.RAB.Loss.CS.RF.RNC
− Abnormal: VS.RAB.Loss.CS.Abnorm.RNC (exclude RF reason)
− Normal: VS.RAB.Loss.CS.Norm.RNC
� PS
− Due to RF: VS.RAB.Loss.PS.RF.RNC
− Abnormal: VS.RAB.Loss.PS.Abnorm.RNC (exclude RF reason)
− Normal: VS.RAB.Loss.PS.Norm.RNC
HUAWEI TECHNOLOGIES CO., LTD. Page 9HUAWEI Confidential
RNC Call Drop Counters System
� RAB Release triggered by RNC due to RF reason (RNC)
� CS: VS.RAB.Loss.CS.RF.RNC
− Due to Failure in the Radio Interface Procedure: VS.RAB.Loss.CS.RF.UuNoReply.RNC
− Due to signaling RLC reset: VS.RAB.Loss.CS.SRBReset.RNC
� PS: VS.RAB.Loss.PS.RF.RNC
− Due to Failure in the Radio Interface Procedure: VS.RAB.Loss.PS.RF.UuNoReply.RNC
− Due to signaling RLC reset: VS.RAB.Loss.PS.SRBReset.RNC
− Due to traffic Radio Link Control (RLC) Reset: VS.RAB.Loss.PS.TRBReset.RNC
HUAWEI TECHNOLOGIES CO., LTD. Page 10HUAWEI Confidential
RNC Call Drop Counters System
� RAB Release triggered by RNC due to Abnormal Reason (RNC)
� CS: VS.RAB.Loss.CS.Abnorm.RNC
− RAB.RelReqCS.RABPreempt
− RAB.RelReqCS.UTRANGen
− RAB.RelReqCS.OM
− VS.RAB.Loss.CS.Aal2Loss.RNC
− VS.RAB.Loss.CS.RelUEGen.RNC
− VS.RAB.Loss.CS.Congstion.RNC
� PS: VS.RAB.Loss.PS.Abnorm.RNC
− RAB.RelReqPS.RABPreempt
− RAB.RelReqPS.UTRANGen
− RAB.RelReqPS.OM
− VS.RAB.Loss.PS.GTPULoss.RNC
− VS.RAB.Loss.PS.RelUEGen.RNC
− VS.RAB.Loss.PS.Congstion.RNC
HUAWEI TECHNOLOGIES CO., LTD. Page 11HUAWEI Confidential
RNC Call Drop Counters System
� RAB Release triggered by RNC based on different services (RNC)
� CS
− AMR: VS.RAB.Loss.CS.AMR.RNC
− VP: VS.RAB.Loss.CS.Conv64K.RNC
� PS
− PS64: VS.RAB.Loss.PS.64K.RNC
− PS128: VS.RAB.Loss.PS.128K.RNC
− PS384: VS.RAB.Loss.PS.384K.RNC
HUAWEI TECHNOLOGIES CO., LTD. Page 12HUAWEI Confidential
RNC Call Drop KPI
� Call Drop Rate (RNC)
� Formula
� Measurement scope:
− RNC
� Description
− This KPI can be used to evaluate the call drop ratio of different services
in one RNC. The call drops will happen due to RNC abnormal release
trigged by RAB RELEASE REQUEST or IU RELEASE REQUEST
messages
%100Re
Re_ ×=
leaseServiceRAB
leaseAbnormalServiceRABCDRService
HUAWEI TECHNOLOGIES CO., LTD. Page 13HUAWEI Confidential
RNC Call Drop KPI
� CS AMR Call Drop Rate
� Counters (RNC)
− AMRRABAbnormalRelease: VS.RAB.Loss.CS.AMR.RNC
− AMRRABRelease:
▪ The RNC level counter can be calculated by aggregating all the cell
counters .
� CS VP Call Drop Rate
� Counters (RNC)
− VPRABAbnormalRelease: VS.RAB.Loss.CS.Conv64K.RNC
− VPRABSetupRelease
▪ The RNC level counter can be calculated by aggregating all the cell
counters
HUAWEI TECHNOLOGIES CO., LTD. Page 14HUAWEI Confidential
RNC Call Drop KPI
� PS Service Call Drop Rate
� Formula (RNC):
− PSRABAbnormalRelease:
▪ VS.RAB.Loss.PS.RF.RNC + VS.RAB.Loss.PS.Abnorm.RNC -
VS.RAB.Loss.PS.RelUEGen.RNC
− PSRABRelease:
▪ The RNC level counter can be calculated by aggregating all the cell counters
HUAWEI TECHNOLOGIES CO., LTD. Page 15HUAWEI Confidential
Chapter 1 RNC Call Drop Counter system and KPI Chapter 1 RNC Call Drop Counter system and KPI
Chapter 2 Cell Call Drop Counter system and KPI Chapter 2 Cell Call Drop Counter system and KPI
HUAWEI TECHNOLOGIES CO., LTD. Page 16HUAWEI Confidential
Chapter 1 Chapter 1 Cell Call Drop Counter system and KPICell Call Drop Counter system and KPI
1.1 R99/R4 service call drop counter system and KPI1.1 R99/R4 service call drop counter system and KPI
1.2 HSDPA service call drop counter system and KPI1.2 HSDPA service call drop counter system and KPI
HUAWEI TECHNOLOGIES CO., LTD. Page 17HUAWEI Confidential
Cell Call Drop Counters System� RAB.RelAbnormal.Cell
� CS
− Based on QoS: Conversational & Streaming
− Based on Services: AMR
− Based abnormal reasons:
▪ RAB preempted
▪ UTRAN generated reason
▪ CELL congestion
− Based on RF reasons:
▪ Uplink synchronization failure
▪ No reply
− Normal release
▪ AMR normal release
▪ OM intervention
▪ Iu interface AAL2 link abnormity
▪ Signalling RLC reset
▪ Other
HUAWEI TECHNOLOGIES CO., LTD. Page 18HUAWEI Confidential
Cell Call Drop Counters System� RAB.RelAbnormal.Cell
� PS
− Based on QoS: Conversational, Streaming, Interactive & Background
− Based on Services: PS 64K, PS 128K & PS 384K
− Based abnormal reasons:
▪ RAB preempted
▪ UTRAN generated reason
▪ CELL congestion
− Based on abnormal reasons for different services
▪ PS 64K, PS 128K & PS 384K
− Based on RF reasons
− Based on RF reasons for different services
− Normal release
▪ Based on different services
▪ OM intervention
▪ GTPU abnormity
HUAWEI TECHNOLOGIES CO., LTD. Page 19HUAWEI Confidential
Cell Call Drop Counters System
� RAB Release (Cell)
� CS
− Due to RF: VS.RAB.Loss.CS.RF
− Abnormal: VS.RAB.Loss.CS.Abnorm (Exclude RF reason)
− Normal: VS.RAB.Loss.CS.Norm
� PS
− Due to RF: VS.RAB.Loss.PS.RF
− Abnormal: VS.RAB.Loss.PS.Abnorm (Exclude RF reason)
− Normal: VS.RAB.Loss.PS.Norm
HUAWEI TECHNOLOGIES CO., LTD. Page 20HUAWEI Confidential
Cell Call Drop Counters System
� RAB Release triggered by RNC due to RF reason (Cell)
� CS: VS.RAB.Loss.CS.RF
− VS.RAB.Loss.CS.RF.RLCRst
− VS.RAB.Loss.CS.RF.ULSync
− VS.RAB.Loss.CS.RF.UuNoReply
− VS.RAB.Loss.CS.RF.Oth
� PS: VS.RAB.Loss.PS.RF
− VS.RAB.Loss.PS.RF.RLCRst
− VS.RAB.Loss.PS.RF.ULSync
− VS.RAB.Loss.PS.RF.UuNoReply
− VS.RAB.Loss.PS.RF.Oth
HUAWEI TECHNOLOGIES CO., LTD. Page 21HUAWEI Confidential
Cell Call Drop Counters System
� RAB Release triggered by RNC due to Abnormal based on different reasons (Cell)
� CS: VS.RAB.Loss.CS.Abnorm
− VS.RAB.RelReqCS.OM
− VS.RAB.RelReqCS.RABPreempt
− VS.RAB.RelReqCS.UTRANgen
− VS.RAB.Loss.CS.Aal2Loss
− VS.RAB.Loss.CS.Congstion.CELL
� PS: VS.RAB.Loss.PS.Abnorm
− VS.RAB.RelReqPS.OM
− VS.RAB.RelReqPS.RABPreempt
− VS.RAB.RelReqPS.UTRANgen
− VS.RAB.Loss.PS.GTPULoss
− VS.RAB.Loss.PS.Congstion.CELL
HUAWEI TECHNOLOGIES CO., LTD. Page 22HUAWEI Confidential
Cell Call Drop Counters System
� RAB Release triggered by RNC due to Abnormal based on different services (Cell)
� CS: VS.RAB.Loss.CS.Abnorm
− VS.RAB.Loss.CS.Abnorm.AMR
� PS: VS.RAB.Loss.PS.Abnorm
− VS.RAB.Loss.PS.Abnorm.DL64
− VS.RAB.Loss.PS.Abnorm.DL128
− VS.RAB.Loss.PS.Abnorm.DL384
HUAWEI TECHNOLOGIES CO., LTD. Page 23HUAWEI Confidential
Cell Call Drop Counters System
� RAB Release triggered by RNC due to Normal based on different services (Cell)
� CS: VS.RAB.Loss.CS.Norm
− VS.RAB.Loss.CS.Norm.AMR
� PS: VS.RAB.Loss.PS.Norm
− VS.RAB.Loss.PS.Norm.DL64
− VS.RAB.Loss.PS.Norm.DL128
− VS.RAB.Loss.PS.Norm.DL384
HUAWEI TECHNOLOGIES CO., LTD. Page 24HUAWEI Confidential
Cell Call Drop Counters System
� RAB Release triggered by RNC based on different services (Cell)
� CS services:
− VS.RAB.Loss.CS.AMR
− VS.RAB.Loss.CS.Conv64K
� PS services:
− VS.RAB.Loss.PS.64K
− VS.RAB.Loss.PS.128K
− VS.RAB.Loss.PS.384K
HUAWEI TECHNOLOGIES CO., LTD. Page 25HUAWEI Confidential
Cell Call Drop KPI
� Service Call Drop Rate (Cell)
� Formula
� Measurement scope:
− Cell
� Description
− This KPI can be used to evaluate the call drop ratio of different services
in one cell. The call drops will happen due to RNC abnormal release
trigged by RAB RELEASE REQUEST or IU RELEASE REQUEST
messages
%100Re
Re_ ×=
leaseServiceRAB
leaseAbnormalServiceRABCDRService
HUAWEI TECHNOLOGIES CO., LTD. Page 26HUAWEI Confidential
Cell Call Drop KPI
� CS AMR Call Drop Rate (Cell)
� AMRRABAbnormalRelease:
− VS.RAB.Loss.CS.AMR
� AMRRABRelease:
− VS.RAB.Loss.CS.AMR + VS.RAB.Loss.CS.Norm.AMR
� CS VP Call Drop Rate (Cell)
� VPRABAbnormalRelease:
− VS.RAB.Loss.CS.Conv64K
� VPRABRelease:
− VS.RAB.Loss.CS.Conv64K + VS.RAB.Loss.CS.Norm - VS.RAB.Loss.CS.Norm.AMR
HUAWEI TECHNOLOGIES CO., LTD. Page 27HUAWEI Confidential
Cell Call Drop KPI
� PS 64K Call Drop Rate (Cell)
� PS64KRABAbnormalRelease:
− VS.RAB.Loss.PS.RF.DL64 + VS.RAB.Loss.PS.Abnorm.DL64
� PS64KRABRelease:
− VS.RAB.Loss.PS.RF.DL64 + VS.RAB.Loss.PS.Abnorm.DL64 +
VS.RAB.Loss.PS.Norm.DL64
� PS 128K Call Drop Rate (Cell)
� PS128KAbnormalRelease:
− VS.RAB.Loss.PS.RF.DL128 + VS.RAB.Loss.PS.Abnorm.DL128
� PS128KRelease:
− VS.RAB.Loss.PS.RF.DL128 + VS.RAB.Loss.PS.Abnorm.DL128 +
VS.RAB.Loss.PS.Norm.DL128
HUAWEI TECHNOLOGIES CO., LTD. Page 28HUAWEI Confidential
Cell Call Drop KPI
� PS 384K Call Drop Rate (Cell)
� PS384KAbnormalRelease:
− VS.RAB.Loss.PS.RF.DL384 + VS.RAB.Loss.PS.Abnorm.DL384
� PS384KRelease:
− VS.RAB.Loss.PS.RF.DL384 + VS.RAB.Loss.PS.Abnorm.DL384 +
VS.RAB.Loss.PS.Norm.DL384
HUAWEI TECHNOLOGIES CO., LTD. Page 29HUAWEI Confidential
Chapter 1 Chapter 1 Cell Call Drop Counter system and KPICell Call Drop Counter system and KPI
1.1 R99/R4 service call drop counter system and KPI1.1 R99/R4 service call drop counter system and KPI
1.2 HSDPA service call drop counter system and KPI1.2 HSDPA service call drop counter system and KPI
HUAWEI TECHNOLOGIES CO., LTD. Page 30HUAWEI Confidential
HSDPA Call Drop Counter
� HSDPA service release (Cell)
� Due to Abnormal reasons:
− RF reasons : VS.HSDPA.RAB.Loss.RF
▪ Radio Connection With UE Lost
▪ Failure in the Radio Interface Procedure
− Non RF reasons: VS.HSDPA.RAB.Loss.Abnorm.NonRF
� Due to Normal reasons:
− Due to inactivity of UE: VS.HSDPA.RAB.Loss.InActivity
▪ User Inactivity
− Due to normal reason: VS.HSDPA.RAB.Loss.Norm
▪ Successful Relocation
▪ Normal Release
HUAWEI TECHNOLOGIES CO., LTD. Page 31HUAWEI Confidential
HSDPA Call Drop KPI
� Service Call Drop Rate (Cell)
� Formula
� Measurement scope:
− Cell
� Description
− This KPI can be used to evaluate the HSDPA call drop ratio in one cell.
The call drops will happen due to RNC abnormal release trigged by RAB
RELEASE REQUEST or IU RELEASE REQUEST messages
%100Re
Re_ ×=
leaseHSDPARAB
leasenormalHSDPARABAbCDRHSDPA
HUAWEI TECHNOLOGIES CO., LTD. Page 32HUAWEI Confidential
HSDPA Call Drop KPI
� HSDPA Call Drop Rate (Cell)
� HSDPAAbnormalRelease:
− VS.HSDPA.RAB.Loss.Abnorm.NonRF + VS.HSDPA.RAB.Loss.RF
� HSDPARelease:
− VS.HSDPA.RAB.Loss.Abnorm.NonRF+VS.HSDPA.RAB.Loss.RF+VS.HSDPA.RAB.Loss.In
Activity+VS.HSDPA.RAB.Loss.Norm
HUAWEI TECHNOLOGIES CO., LTD. Page 33HUAWEI Confidential
Summary
� This slide mainly explained the KPIs about call
drop
� RNC
− AMR, VP, PS
� Cell
− AMR, VP, PS64, PS128, PS384
− HSDPA
SummarySummary
Thank youwww.huawei.com