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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