Download - 51977338 huawei-wcdma-call-drop-counter-and-kpi-introduction

HUAWEI TECHNOLOGIES CO., LTD.

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HUAWEI Confidential

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WCDMA Call Drop Counter System and KPI

ISSUE 1.0

HUAWEI TECHNOLOGIES CO., LTD. HUAWEI 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


� Upon completion of this course, you will be able to:

� Describe call drop counter system

� Know the call drop KPI


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


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


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


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


▪ RAB preempted


▪ OM intervention

▪ GTPU abnormity

▪ UE Signaling Connection Release

▪ CELL congestion



▪ signalling RLC reset

▪ Traffic RLC reset

− Normal release


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



� 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



� 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



� 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




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


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


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


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


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


Cell Call Drop Counters System� RAB.RelAbnormal.Cell

� CS

− Based on QoS: Conversational & Streaming

− Based on Services: AMR


▪ RAB preempted


▪ CELL congestion


▪ Uplink synchronization failure

▪ No reply

− Normal release

▪ AMR normal release

▪ OM intervention

▪ Iu interface AAL2 link abnormity

▪ Signalling RLC reset

▪ Other


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


▪ RAB preempted


▪ 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


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



� 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



� 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



� 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





� 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





� 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




Cell Call Drop KPI

� Service Call Drop Rate (Cell)

� Formula


− 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


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


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


� PS128KAbnormalRelease:


� PS128KRelease:




Cell Call Drop KPI


� PS384KAbnormalRelease:


� PS384KRelease:




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


HSDPA Call Drop Counter

� HSDPA service release (Cell)

� Due to Abnormal reasons:

− RF reasons : VS.HSDPA.RAB.Loss.RF

▪ Radio Connection With UE Lost


− 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


HSDPA Call Drop KPI

� Service Call Drop Rate (Cell)

� Formula


− 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


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


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

Download - 51977338 huawei-wcdma-call-drop-counter-and-kpi-introduction

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