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

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  • 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