51977338-Huawei-WCDMA-Call-Drop-Counter-and-KPI-Introduction.pdf
March 27, 2017 | Author: Mihai Nitescu | Category: N/A
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WCDMA Call Drop Counter System and KPI ISSUE 1.0 www.huawei.com
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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
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Upon completion of this course, you will be able
to: Describe call drop counter system Know the call drop KPI
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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
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Chapter 1 RNC Call Drop Counter system and KPI Chapter 2 Cell Call Drop Counter system and KPI
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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.
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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.
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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
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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
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RNC Call Drop Counters System
RAB Release triggered by RNC due to Abnormal Reason (RNC)
CS: VS.RAB.Loss.CS.Abnorm.RNC
PS: VS.RAB.Loss.PS.Abnorm.RNC
− RAB.RelReqCS.RABPreempt
− RAB.RelReqPS.RABPreempt
− RAB.RelReqCS.UTRANGen
− RAB.RelReqPS.UTRANGen
− RAB.RelReqCS.OM
− RAB.RelReqPS.OM
− VS.RAB.Loss.CS.Aal2Loss.RNC
− VS.RAB.Loss.PS.GTPULoss.RNC
− VS.RAB.Loss.CS.RelUEGen.RNC
− VS.RAB.Loss.PS.RelUEGen.RNC
− VS.RAB.Loss.CS.Congstion.RNC
− VS.RAB.Loss.PS.Congstion.RNC
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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
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RNC Call Drop KPI Call Drop Rate (RNC)
Formula
Service _ CDR =
ServiceRABAbnormal Re lease × 100% ServiceRAB Re lease
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
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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
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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
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Chapter 1 RNC Call Drop Counter system and KPI Chapter 2 Cell Call Drop Counter system and KPI
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Chapter 1 Cell Call Drop Counter system and KPI 1.1 R99/R4 service call drop counter system and KPI
1.2 HSDPA service call drop counter system and KPI
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Cell Call Drop Counters System RAB.RelAbnormal.Cell CS − Based on QoS: Conversational & Streaming − Based on Services: AMR − Based abnormal reasons: ▪ RAB preempted
▪ OM intervention
▪ UTRAN generated reason
▪ Iu interface AAL2 link abnormity
▪ CELL congestion − Based on RF reasons: ▪ Uplink synchronization failure
▪ Signalling RLC reset
▪ No reply
▪ Other
− Normal release ▪ AMR normal release
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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
▪ OM intervention
▪ UTRAN generated reason
▪ GTPU abnormity
▪ 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
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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
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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
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Cell Call Drop Counters System
RAB Release triggered by RNC due to Abnormal based on different reasons (Cell)
CS: VS.RAB.Loss.CS.Abnorm
PS: VS.RAB.Loss.PS.Abnorm
− VS.RAB.RelReqCS.OM
− VS.RAB.RelReqPS.OM
− VS.RAB.RelReqCS.RABPreempt
− VS.RAB.RelReqPS.RABPreempt
− VS.RAB.RelReqCS.UTRANgen
− VS.RAB.RelReqPS.UTRANgen
− VS.RAB.Loss.CS.Aal2Loss
− VS.RAB.Loss.PS.GTPULoss
− VS.RAB.Loss.CS.Congstion.CELL
− VS.RAB.Loss.PS.Congstion.CELL
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Cell Call Drop Counters System
RAB Release triggered by RNC due to Abnormal based on different services (Cell)
CS: VS.RAB.Loss.CS.Abnorm
PS: VS.RAB.Loss.PS.Abnorm
− VS.RAB.Loss.CS.Abnorm.AMR
− VS.RAB.Loss.PS.Abnorm.DL64 − VS.RAB.Loss.PS.Abnorm.DL128 − VS.RAB.Loss.PS.Abnorm.DL384
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Cell Call Drop Counters System
RAB Release triggered by RNC due to Normal based on different services (Cell)
CS: VS.RAB.Loss.CS.Norm
PS: VS.RAB.Loss.PS.Norm
− VS.RAB.Loss.CS.Norm.AMR
− VS.RAB.Loss.PS.Norm.DL64 − VS.RAB.Loss.PS.Norm.DL128 − VS.RAB.Loss.PS.Norm.DL384
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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
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Cell Call Drop KPI Service Call Drop Rate (Cell)
Formula
Service _ CDR =
ServiceRABAbnormal Re lease ×100% ServiceRAB Re lease
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
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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
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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
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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
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Chapter 1 Cell Call Drop Counter system and KPI
1.1 R99/R4 service call drop counter system and KPI 1.2 HSDPA service call drop counter system and KPI
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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
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HSDPA Call Drop KPI Service Call Drop Rate (Cell)
Formula
HSDPARABAb normal Re lease HSDPA _ CDR = × 100 % HSDPARAB Re lease
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
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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
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Summary
Summary
This slide mainly explained the KPIs about call
drop RNC − AMR, VP, PS Cell − AMR, VP, PS64, PS128, PS384 − HSDPA
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Thank you www.huawei.com
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