Huawei KPI Formulas.pdf

Huawei KPI Formulas

Accessibility  Call Setup Success Rate  CSSR_Voice(%)  100 * (((RRC.SuccConnEstab.OgConvCall + RRC.SuccConnEstab.TmConvCall) / (RRC.AttConnEstab.OrgConvCall + RRC.AttConnEstab.TmConvCall)) * (VS.RAB.SuccEstab.AMR / VS.RAB.AttEstab.AMR))  Basically OK as Voice call should be “Conversational” class of traffic.  Suggest to add “RRC.SuccConnEstab.OrgEmgCall” to numerator and “RRC.AttConnEstab.OrgEmgCall” to denominator to the formula

 CSSR_Video(%)  100 * (((RRC.SuccConnEstab.OgConvCall + RRC.SuccConnEstab.TmConvCall) / (RRC.AttConnEstab.OrgConvCall + RRC.AttConnEstab.TmConvCall)) * (VS.RAB.SuccEstCS.Conv.64 / VS.RAB.AttEstCS.Conv.64))  OK as the KPI focus on Video service only which should be “Conversational” class of traffic.

Accessibility (Continue)  PDP Context Activation Success Rate (R99 PS)  CSSR_PS_R99(%)  (VS.RAB.SuccEstabPS.Conv + VS.RAB.SuccEstabPS.Str + VS.RAB.SuccEstabPS.Inter + VS.RAB.SuccEstabPS.Bkg) / (VS.RAB.AttEstabPS.Conv + VS.RAB.AttEstabPS.Str + VS.RAB.AttEstabPS.Inter + VS.RAB.AttEstabPS.Bkg)  The formula is actually used to calculate the PS RAB Success Rate  May need to check if SGSN/GGSN can generate the relevant counters to compute this KPI and differentiate between R99 PS and HSDPA by QoS metrics or collect by driving test.  Otherwise, need to revise the KPI name to “PS Call Setup Success Rate (R99)”.  If so, formula needs to multiply by RRC Connection Setup Success Rate that carries PS Traffic:  (RRC.SuccConnEstab.OrgBkgCall + RRC.SuccConnEstab.OgConvCall + RRC.SuccConnEstab.OrgItrCall + RRC.SuccConnEstab.OrgStrCall + RRC.SuccConnEstab.OrgSubCall + RRC.SuccConnEstab.TmBkgCall + RRC.SuccConnEstab.TmConvCall + RRC.SuccConnEstab.TmItrCall + RRC.SuccConnEstab.TmStrCall + RRC.SuccConnEstab.EmgCall) / (RRC.AttConnEstab.OrgBkgCall + RRC.AttConnEstab.OrgConvCall + RRC.AttConnEstab.OrgInterCall + RRC.AttConnEstab.OrgStrCall + RRC.AttConnEstab.OgSubCall + RRC.AttConnEstab.TmBkgCall + RRC.AttConnEstab.TmConvCall + RRC.AttConnEstab.TmInterCall + RRC.AttConnEstab.TmStrCall + RRC.AttConnEstab.EmgCall)

Accessibility (Continue)  PS Setup Success Rate (HSDPA)  CSSR_PS_HSDPA(%)  ((RRC.SuccConnEstab.OrgltrCall + RRC.SuccConnEstab.OrgBkgCall + RRC.SuccConnEstab.TmltrCall + RRC.SuccConnEstab.TmBkgCall) / (RRC.AttConnEstab.OrgInterCall + RRC.AttConnEstab.OrgBkgCall + RRC.AttConnEstab.TmInterCall + RRC.AttConnEstab.TmBkgCall)) * (VS.HSDPA.RAB.SuccEstab / VS.HSDPA.RAB.AttEstab)  It is suggested to use the same RRC Connection Setup Success Rate as in PS R99 that could possibly carries PS traffic.  (RRC.SuccConnEstab.OrgBkgCall + RRC.SuccConnEstab.OgConvCall + RRC.SuccConnEstab.OrgItrCall + RRC.SuccConnEstab.OrgStrCall + RRC.SuccConnEstab.OrgSubCall + RRC.SuccConnEstab.TmBkgCall + RRC.SuccConnEstab.TmConvCall + RRC.SuccConnEstab.TmItrCall + RRC.SuccConnEstab.TmStrCall + RRC.SuccConnEstab.EmgCall) / (RRC.AttConnEstab.OrgBkgCall + RRC.AttConnEstab.OrgConvCall + RRC.AttConnEstab.OrgInterCall + RRC.AttConnEstab.OrgStrCall + RRC.AttConnEstab.OgSubCall + RRC.AttConnEstab.TmBkgCall + RRC.AttConnEstab.TmConvCall + RRC.AttConnEstab.TmInterCall + RRC.AttConnEstab.TmStrCall + RRC.AttConnEstab.EmgCall)

Retainability  CS Call Drop Rate  CDR_CS(%)  100 * (1 – (VS.RAB.Loss.CS.Norm.AMR / (VS.RAB.Loss.CS.Norm.AMR + VS.RAB.Loss.CS.AMR)))  The formula only accounts Voice AMR service which does not match with the KPI name.  Also, VS.RAB.Loss.CS.Abnorm is missing.  Suggest to revise the formula as below:  100 * (VS.RAB.Loss.CS.Abnorm + VS.RAB.Loss.CS.RF) / (VS.RAB.Loss.CS.Abnorm + VS.RAB.Loss.CS.Norm + VS.RAB.Loss.CS.RF)

Retainability (Continue)  PS Call Drop Rate  CDR_PS_R99(%)  100 * (VS.RAB.Loss.PS.Abnorm + VS.RAB.Loss.PS.RF) / (VS.RAB.Loss.PS.Abnorm + VS.RAB.Loss.PS.RF + VS.RAB.Loss.PS.Norm)  Need to clarify with Huawei whether the counters used includes HSDPA or not. If yes, suggest to use below formula to avoid confusion:  (VS.Abnorm.Rel.PS.Conv + VS.Abnorm.Rel.PS.Str + VS.Abnorm.Rel.PS.BE.RB.0.32 + VS.Abnorm.Rel.PS.BE.RB.32.64 + VS.Abnorm.Rel.PS.BE.RB.64.144 + VS.Abnorm.Rel.PS.BE.RB.144.384) / (VS.Abnorm.Rel.PS.Conv + VS.Abnorm.Rel.PS.Str + VS.Abnorm.Rel.PS.BE.RB.0.32 + VS.Abnorm.Rel.PS.BE.RB.32.64 + VS.Abnorm.Rel.PS.BE.RB.64.144 + VS.Abnorm.Rel.PS.BE.RB.144.384 + VS.Norm.Rel.PS.Conv + VS.Norm.Rel.PS.Str + VS.Norm.Rel.PS.BE.RB.0.32 + VS.Norm.Rel.PS.BE.RB.32.64 + VS.Norm.Rel.PS.BE.RB.64.144 + VS.Norm.Rel.PS.BE.RB.144.384)

Retainability (Continue)  PS Call Drop Rate  CDR_PS_HSDPA(%)  100 * (VS.HSDPA.RAB.Loss.Abnorm.NonRF + VS.HSDPA.RAB.Loss.RF) / (VS.HSDPA.RAB.Loss.InActivity + VS.HSDPA.RAB.Loss.Abnorm.NonRF + VS.HSDPA.RAB.Loss.RF + VS.HSDPA.RAB.Loss.Norm + VS.HSDPA.ChR.HSDSCHtoDCH + Vs.HSDPA.Chr.HSDSCHtoFACH + VS.HSDPA.HHO.H2D.SuccOutIntraFreq + VS.HSDPA.HHO.H2D.SuccOutInterFreq)  Need to double check with Huawei if VS.HSDPA.RAB.Loss.Norm, VS.HSDPA.ChR.HSDSCHtoDCH, Vs.HSDPA.Chr.HSDSCHtoFACH, VS.HSDPA.HHO.H2D.SuccOutIntraFreq and VS.HSDPA.HHO.H2D.SuccOutInterFreq are disjoint set of counters. Make sure there is no duplicate count.

Mobility  Soft handover Success Rate  SHO SR(%)  100 * ((SHO.SuccRlAddUESide + SHO.SuccRLDelUESide) / (Sho.AttRLAddUESide + SHO.AttRLDelUESide))  OK.

 Inter RAT handover Success Rate (2G/3G)  ISHO_CS_3Gto2G(%)  100 * IRATHO.SuccOutCS / IRATHO.AttOutCS  OK.

 ISHO_PS_3Gto2G(%)  100 * VS.IRATHO.Load.SuccOutPSUTRAN / VS.IRATHO.AttOutPSUTRAN  Not OK. The numerator is only a sub-set of success count. Need to revise as  100 * IRATHO.SuccOutPSUTRAN / IRATHO.AttOutPSUTRAN

Mobility (Continue)  Hard handover Success Rate  Hard HO CS SR(%)  100 * VS.MBand.HO.SuccOutCS / VS.MBand.HO.AttOutCS  Depend on network configuration, the formula is focus on Multi-Band Frequency Hard Handover. It is only a sub-set of HHO and only useful if the network has multiband UMTS configuration  There is no complete set of counters to differentiate the HHO into CS and PS domain.

 Hard HO PS SR(%)  100 * VS.MBand.HO.SuccOutPS / VS.MBand.HO.AttOutPS  Same problem as CS case.

 May consider using overall interfrequency HHO counters:  VS.HHO.InterFreq.SuccOut / VS.HHO.InterFreq.AttOut

Traffic  The rest of KPI formulas used in this category has no major problem.  Make sure the sum of counters need to be divided by the number of samples in the collected period.  Suggest to add following formula for tracking the number of HSDPA and HSUPA users  Mean # of HSDPA Users  sum(VS.HSDPA.UE.Mean.Cell) / Number of Samples

 Mean # of HSUPA Users  sum(VS.HSUPA.UE.Mean.Cell) / Number of Samples