6 wcdma ran12 call drop kpi and relative counters issue 1.01

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WCDMA RAN12 Call Drop KPI and Relative Counters ISSUE 1.01

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  • WCDMA RAN Call Drop KPI and Relative

    Counters

    Confidential Information of Huawei. No Spreading Without Permission

  • WCDMA RAN Call Drop KPI and Relative

    Counters

    Confidential Information of Huawei. No Spreading Without Permission

  • WCDMA RAN Call Drop KPI and Relative

    Counters

    Confidential Information of Huawei. No Spreading Without Permission

  • The scenario for User inactivity:

    If a user with PS service has no data transmission after a certain timer expires

    (this timer is set by RNC), RNC can send signaling IU RELEASE REQUEST

    to CN to release the service. This is not considered as call drop.

    The scenario for UE generated signaling connection release

    Some type of UE can release signaling connection automatically be sending

    signaling SIGNALLING CONNECTION RELEASE INDICATION to RNC, then

    RNC will send signaling IU RELEASE REQUEST to CN to release the service.

    This is not considered as call drop neither.

    WCDMA RAN Call Drop KPI and Relative

    Counters

    P-4Confidential Information of Huawei. No Spreading Without Permission

  • WCDMA RAN Call Drop KPI and Relative

    Counters

    P-5Confidential Information of Huawei. No Spreading Without Permission

  • WCDMA RAN Call Drop KPI and Relative

    Counters

    P-6Confidential Information of Huawei. No Spreading Without Permission

  • WCDMA RAN Call Drop KPI and Relative

    Counters

    Confidential Information of Huawei. No Spreading Without Permission

    CDR: call drop ratio

  • WCDMA RAN Call Drop KPI and Relative

    Counters

    Confidential Information of Huawei. No Spreading Without Permission

  • WCDMA RAN Call Drop KPI and Relative

    Counters

    Confidential Information of Huawei. No Spreading Without Permission

  • WCDMA RAN Call Drop KPI and Relative

    Counters

    Confidential Information of Huawei. No Spreading Without Permission

  • WCDMA RAN Call Drop KPI and Relative

    Counters

    Confidential Information of Huawei. No Spreading Without Permission

  • WCDMA RAN Call Drop KPI and Relative

    Counters

    Confidential Information of Huawei. No Spreading Without Permission

  • WCDMA RAN Call Drop KPI and Relative

    Counters

    Confidential Information of Huawei. No Spreading Without Permission

    VP: video phone

  • WCDMA RAN Call Drop KPI and Relative

    Counters

    Confidential Information of Huawei. No Spreading Without Permission

  • WCDMA RAN Call Drop KPI and Relative

    Counters

    Confidential Information of Huawei. No Spreading Without Permission

  • WCDMA RAN Call Drop KPI and Relative

    Counters

    Confidential Information of Huawei. No Spreading Without Permission

  • WCDMA RAN Call Drop KPI and Relative

    Counters

    Confidential Information of Huawei. No Spreading Without Permission

  • WCDMA RAN Call Drop KPI and Relative

    Counters

    Confidential Information of Huawei. No Spreading Without Permission

  • WCDMA RAN Call Drop KPI and Relative

    Counters

    Confidential Information of Huawei. No Spreading Without Permission

  • WCDMA RAN Call Drop KPI and Relative

    Counters

    Confidential Information of Huawei. No Spreading Without Permission

  • WCDMA RAN Call Drop KPI and Relative

    Counters

    Confidential Information of Huawei. No Spreading Without Permission

    Why

    VS.HSDPA.H2D.Succ+VS.HSDPA.H2F.Succ+VS.HSDPA.HHO.H2D.SuccOutIntra

    Freq+VS.HSDPA.HHO.H2D.SuccOutInterFreq is added in the denominator to

    calculate the HSDPA service drop ratio?

    If one user switch from HS-DSCH to other channel types due to some reason

    (mobility e.g.), it should be consider as a normal HS-DSCH release (refer to

    second item in Notes).

  • WCDMA RAN Call Drop KPI and Relative

    Counters

    Confidential Information of Huawei. No Spreading Without Permission

    VS.HSDPA.RAB.AbnormRel

    Number of HSDPA RABs abnormal released for cell

    VS.HSDPA.RAB.NormRel

    Number of HSDPA RABs normal released for cell

    VS.HSDPA.H2D.Succ

    Number of successful handovers from HS-DSCH to DCH for cell

    VS.HSDPA.H2F.Succ

    Number of successful handovers from HS-DSCH to CCH for cell

    VS.HSDPA.HHO.H2D.SuccOutIntraFreq

    Number of successful Intra-Frequency H2D hard handovers for cell

    VS.HSDPA.HHO.H2D.SuccOutInterFreq

    Number of successful Inter-Frequency H2D hard handovers for cell

    UE RNC

    RB Reconfiguration

    RB Reconfiguration Complete

    Counter VS.HSDPA.H2D.Succ /

    VS.HSDPA.H2F.Succ /

    VS.HSDPA.HHO.H2D.SuccOutIntraFreq /

    S.HSDPA.HHO.H2D.SuccOutInterFreq is added by

    1 in the corresponding scenarios.

    Cpounter VS.HSDPA.H2D.Succ / VS.HSDPA.H2F.Succ is triggered in H2D / H2F channel switch.

    Counter VS.HSDPA.HHO.H2D.SuccOutIntraFreq / S.HSDPA.HHO.H2D.SuccOutInterFreq is triggered in H2D

    inter-frequencty / intra-frequency hard handover.

    H2D / H2F Channel switch and H2D hard handover are both completed by RB Reconfiguration procedure.

  • WCDMA RAN Call Drop KPI and Relative

    Counters

    Confidential Information of Huawei. No Spreading Without Permission

    Why

    VS.HSUPA.E2D.Succ+VS.HSUPA.E2F.Succ+VS.HSUPA.HHO.E2D.SuccOutIntra

    Freq+VS.HSUPA.HHO.E2D.SuccOutInterFreq is added in the denominator to

    calculate the HSUPA service drop ratio?

    If one user switch from E-DCH to other channel types due to some reason

    (mobility e.g.), it should be consider as a normal E-DCH release (refer to

    second item in Notes).

  • WCDMA RAN Call Drop KPI and Relative

    Counters

    Confidential Information of Huawei. No Spreading Without Permission

    VS.HSUPA.RAB.AbnormRel

    Number of HSUPA RABs abnormal released for cell

    VS.HSUPA.RAB.NormRel

    Number of HSUPA RABs normal released for cell

    VS.HSUPA.E2D.Succ

    Number of successful handovers from E-DCH to DCH for cell

    VS.HSUPA.E2F.Succ

    Number of successful handovers from E-DCH to CCH for cell

    VS.HSUPA.HHO.E2D.SuccOutIntraFreq

    Number of successful Intra-Frequency E2D hard handovers for cell

    VS.HSUPA.HHO.E2D.SuccOutInterFreq

    Number of successful Inter-Frequency E2D hard handovers for cell

  • WCDMA RAN Call Drop KPI and Relative

    Counters

    Confidential Information of Huawei. No Spreading Without Permission

  • If the call drop ratio is high, we need to find the reason. Some counters can indicate

    the reason of call drop.

    WCDMA RAN Call Drop KPI and Relative

    Counters

    Confidential Information of Huawei. No Spreading Without Permission

  • Normally RF (radio frequency) problem is the main reason of call drop in real network

    such as bad coverage or handover failure.

    WCDMA RAN Call Drop KPI and Relative

    Counters

    Confidential Information of Huawei. No Spreading Without Permission

  • VS.RAB.AbnormRel.CS.IuAAL2

    Number of CS RABs Abnormally Released for Cell Due to Iu Interface AAL2 Link

    Failure

    This counter is triggered when RNC finds the AAL2 path is abnormal. Maybe it is the

    problem of Iu-CS transmission.

    VS.RAB.AbnormRel.CS.RF

    Number of CS RABs Abnormally Released Due to RF for Cell

    Some RF problems will trigger this counter such as bad coverage, handover failure,

    interference and etc. Normally RF problem is the main reason of call drop in real

    network.

    VS.RAB.AbnormRel.CS.OM

    Number of CS RAB Release Requests for Cell Due to O&M Intervention

    If RAB is release by O&M intervention (For example RAB is released by MML

    command), this counter will be triggered. Normally this is not the main reason of call

    drop in real network.

    VS.RAB.AbnormRel.CS.Preempt

    Number of CS RAB Release Attempts for Cell Due to RAB Preemption

    During access control procedure if system resource is limited and preemption function

    is enabled, a user with higher priority can preempt a user with lower priority. Then this

    counter will be triggered.

    VS.RAB.AbnormRel.CS.UTRANgen

    Number of CS RAB Abnormal Releases Triggered by RNC for Cell Due to UTRAN

    Cause

    If RAB is released because of UTRAN problem, this counter will be triggered. If this

    counter has high value, more detailed information need to be collected and analyzed.

    VS.RAB.AbnormRel.CS.OLC

    Number of CS Domain RABs Released Due to Congestion for Cell

    If the system load is very high and over load control function is enabled, RNC can

    release some RAB to reduce the load. Then this counter will be triggered.

    WCDMA RAN Call Drop KPI and Relative

    Counters

    Confidential Information of Huawei. No Spreading Without Permission

  • Normally RF problem is the main reason of call drop. More sub counters can be used

    to analyze the detailed RF reason of call drop. To find the exact reason maybe more

    detailed information such as drive test result and signaling trace result need to be

    collected.

    VS.RAB.AbnormRel.CS.RF.ULSync

    If NodeB loses the UL synchronization of the UE during service, the RAB will

    be released and this counter will be triggered. Bad coverage or missing

    neighboring cell configuration can triggered this counter.

    VS.RAB.AbnormRel.CS.RF.UuNoReply

    If UE can not respond to the signaling from RNC during service,