中级培训第三模块之一：日常优化.ppt

NokiaRadioNetworkOptimizationProcess,中国移动通信集团河南有限公司网优专家小组,中级培训第三模块之一,Contents,NokiaRadioNetworkOptimization(RNO)ProcessRNOprocessflowOptimizationDrivenFactorsIntroductiontoMajorRNOActivitiesRNOCompetence,RNOProcessFlow1/4,NetworkOptimizationObjectiveAchievebetterqualityofnetworkperformanceusingthelimitednetworkresourceintheexistingnetwork.Bettercustomersatisfaction.NetworkOptimizationConceptsOptimizationstartsduringthenetworkplanningphase.Optimizationisacontinuousfinetuningprocessesontotheexistingnetwork.Optimizationinvolvethefollowingsteps:Varietytoolsusage.NetworkKPImonitoring.Problemsanalysisandtroubleshooting.Changerequestandverification.Databasemaintenanceandreporting.,RNOProcessFlow2/4,RNOProcessFlow3/4,RNOProcessFlow4/4,Isproblemresolved?,Updatesitedatabaseandtrackingdocument,IsKPImet?,Projectclose.Proposefuturephase.,FromLastPage,OptimizationDrivenFactors1/2,Whyisanetworkneedsoptimization?Networkoperationandgrowing.Networkqualitydeclining.Environmentchanging.Customerbehavior.Newservices.,OptimizationDrivenFactors2/2,Whatarethedrivensourcesforoptimization?PerformancemeasurementsDrivetestCustomercomplaintsManagementdecisionNewtechnologyandevolution,MajorRNOactivities:OptimizationpreparationPMstatisticsmonitoringParameterauditingConsistencycheckingAnalysistoolsDrivetestingProposingandimplementingsolution,IntroductionToMajorRNOActivities1/8,OptimizationPreparation:NetworkstructureAcquisitionofsitedatabaseRolloutscheduleNetworkcoverage/capacityareaLocalgeographicalenvironmentPreparationoftoolsandsoftwareKPItargets,IntroductionToMajorRNOActivities2/8,PMStatisticsMonitoring:Daily/WeeklystatisticsmonitoringandanalyzingCallattemptandtraffic(SDCCH/TCH)TCHdropcallrateSDCCHdroprateTCH/SDCCHblockingrateHandoverfailurerateTCHutilizationResourceavailabilityPagingsuccessrateRACHloadingUplink/DownlinkRxquality,IntroductionToMajorRNOActivities3/8,ParameterAuditing:Networkfunctionsenabling/disabling(C2CellReselect,FACCHCallSetup.)Specialfeaturesrelatedparameters(maxTimeLimitDR,MSmaxrange.)BTSdefaultparameterauditbeforeanymajoractivities(cutover,newsiteon-air.)Therearemainly5tablesinPlanEdittocheck:BTSparametertableTRXparametertableHandovercontrolparametertablePowercontrolparametertableAdjacentcellparametertableOtherlessusedtablesincludebutnotlimitedto:BSCparametertableBCFparametertable,IntroductionToMajorRNOActivities4/8,ConsistencyCheck:ComparenetworkconfigurationagainstnetworkdesignBeforeandafteranymajorengineeringactivitiesNewsiteon-airRegularlycheckAdjacenciestonon-existingcells(065)Non-symmetricaladjacencies(061)Adjacentcellwithsameoradjacentfrequency(062a,b)SynchronizedHO(067)Adjacencydiscrepancies(060)BTSparametersurvey(068)MMLcommandlikeZEAT,tocheckco-channelneighbours,IntroductionToMajorRNOActivities5/8,AnalysisTools:OSS4NetworkDoctorandMMLNetworkadministrationandperformancemonitoringMapinfoZEQO:BTS=1:ALL;OutputPowerControlParameters:ZEUO:BTS=1,Outputalarmrecords:ZEOL:1;,where1istheBCFnumberDisplaythelogofallalarmsforthewholeBSC:ZAHP;DisplaythecurrentalarmsforthewholeBSC:ZAHO;OutputBTSalarmhistory:ZEOH:2001-09-18:BCF=xx;,DisplayVLRsubscriber:ZMVI;DisplayHLRsubscriber:ZMII;,NetworkDoctorReports1/5,OMC,BSC,BS,BS,NetworkDoctorCDPlus,where1istheBCFnumberDisplaythelogofallalarmsforthewholeBSC:ZAHP;DisplaythecurrentalarmsforthewholeBSC:ZAHO;OutputBTSalarmhistory:ZEOH:2001-09-18:BCF=xx;,RefertoS9NEDChapter2.5AlarmReferenceManualfordetails!,BTSdailymaintenanceworks,HardwarefaultsTroubleshooting6/8,ZZEOL;LOADINGPROGRAMVERSION4.9-0BTSALARMLISTINGBSC10_FYBCF-005BTS-013QUAL2003-02-1116:11:56.70*ALARMHUAIWEIHUI1(12969)7746CHCONGESTIONINBTSABOVEDEFINEDTHRESHOLD0209311084d63d0d63dBSC10_FYBCF-006BTS-016QUAL2003-02-1116:11:56.70*ALARMGONGJIAO1(12970)7746CHCONGESTIONINBTSABOVEDEFINEDTHRESHOLD020902750d48d0d48dBSC10_FYBCF-007BTS-019ENVIR2003-02-0816:16:54.63*ALARMTRX-001DITIEJU1(12763)7941TXANTENNAPERFORMANCEDEGRADED0B0201320100BSC10_FYBCF-037BTS-107QUAL2003-01-1723:59:09.85*ALARMKOUZIZHEN3(11193)7949DIFFERENCEINRXLEVELSOFMAINANDDIVERSITYANTENNA/TRX0C01053800FF,ExampleofoutputalarmsusingMMLZEOL;,HardwarefaultsTroubleshooting7/8,ExampleofAlarmtroubleshootingusingS9NED,BSC10_FYBCF-007BTS-019ENVIR2003-02-0816:16:54.63*ALARMTRX-001DITIEJU1(12763)7941TXANTENNAPERFORMANCEDEGRADED0B0201320100,7941TXANTENNAPERFORMANCEDEGRADEDMeaningThestandingwaveratiooftheTX-antennaisabovetheadjustableloweralarmlevel.Theantennaadjustmentisunbalanced.Callscanstillbemaintained.Thisalarmcanalsobecausedbysnowandiceontheantenna.AFETransmittingTheantennafilterunit(AFE)combinesoneortwotransmitterstoonesingletransmittingantenna.TheAFEalsofilterstransmittersignalstoreachbettersignalquality.,S9NedInfo,MMLAlarminfo,HardwarefaultsTroubleshooting8/8,FromS9NEDSuggestions,ReceivingTheantennafilterunit(AFE)filtersandamplifiesthesignalreceivedfromthereceivingantenna.TheamplifiedoutputsignalsareconnectedtothereceiversoftheBTS.EachAFEcontainstwolownoiceamplifiers(LNA),oneforthemainandoneforthediversityreceivingpath.OneLNAcontainstwodifferentamplifierbranches.TheLNAisoutoforderifbothofthoseamplifierbranchesarefaulty.Supplementaryinformationfields1-6XXXXXXXXXXXX1234561)rack(cabinet)number4)typeofunit2)shelfnumber5)unitnumber3)slot6)subunitnumberSeethedocumentAlarmStructure,AlarmReferenceManualInstructionsChecktheoperationoftheAFEunit,antenna,andcablingbetweentheAFEunitandantenna.Replacethefaultyunit.ThealarmlevelisadjustableintheHWdatabase.CancellingDonotcancelthealarm.Thesystemcancelsthealarmautomaticallywhenthefaulthasbeencorrected.,RefertoS9NEDChapter2.5AlarmReferenceManualfordetails!,HighSDRAnalysis1/12,DropCallsshowthenumberofabnormaldisconnectionsduringcallsetuporduringconversationDroponSDCCHSDRDropcallsonTCHCDRRefertoSDRformulaHowtofinddropcauses?Usethedifferentcountersfordroppedcalls,i.e.RFdrop,Abisdrop,A-interfacedrop,dropbecauseofinterference,dropbecauseofsignallevel,dropbecauseofquality,dropbecauseofhandover,Asubscribershouldbeabletoplacecallssatisfactorilyandhangupinitsowntime,regardlessofthetechnicalreasonsforcall-completionproblems.,F$#%$#,HighSDRAnalysis(droppoint)2/12,HighSDRAnalysis(dropcounters)3/12,HighSDRAnalysis(dropcounters)4/12,SDRCounters,SDCCHREQUESTS/c1000sdcch_seiz_att,SEIZURESFORCALLSANDLU/c1007sdcch_assign,MOC(incl.SMS)/c3013succ_seiz_orig,MTC(incl.SMS)/c3012succ_seiz_term,EMERGENCYCALL/c3021sdcch_emerg_call,CellA,oneofSDCCHfailcountersistriggeredSDCCH_RADIO_FAIL/c1003orSDCCH_USER_ACT/c1037orSDCCH_BCSU_RESET/c1038orSDCCH_NETW_ACT/c1039orSDCCH_BTS_FAIL/c1036orSDCCH_LAPD_FAIL/c1035orSDCCH_A_IF_FAIL_CALL/c1078orSDCCH_ABIS_FAIL_CALL/c1075,Oneofthesetriggered,Calldrops,Callre-establishmentexecuted,SDCCHREQUESTS/c1000sdcch_seiz_att,SEIZURESFORCALLSANDLU/c1007sdcch_assign,CellA,TCH,CALLRE-EST./c3020sdcch_call_re_est,Ghostrachaccessesordoubleseizures,NOTE!Callre-establishmentcanbeexecutedmorethanonce.,RE-EST.ASSGN./c57022(S7)sdcch_re_est_assign,orincaseofSDCCHcongestion,FACCHcallsetupismade,lookatFACCHcallsetuppicture,RE-EST.ASSGNONTCH/c57032(S7)tch_re_est_assign,RE-EST.RELEASE/c57026(S7)sdcch_re_est_release,RE-EST.RELEASEONTCH/c57037(S7)tch_re_est_release,NOTE:Failedre-establishedcallsarecountedbyclearcode208HofNokiaMSC.,HighSDRAnalysis(dropstatistics)5/12,Droppedcallreports,HighSDRAnalysis(congestionstatistics)6/12,200,Arealevel,BTSHitList,rpp216mx,BTSlevel,cngt_2,130,204,blck_5a,216,SDCCHcongestionandblocking,HighSDRAnalysis(dropreasonanalysis)7/12,Droppedcallanalysis,1.Checkdroppedcallspercell.Selectcellswithhighdroppedcallrate.2.Checkreasonfordroppedcallsforselectedcells3.Checkratiooflosthandoverstodroppedcalls.Thereasonistodetermineifthehighdroppedcallrateisrelatedtohandoverperformance.Checkalsowhichcellrelationsthathavemoredroppedcallsthantheaverageneighborrelation.4.CheckdroppedcallsperTStofindfaultydevicesorinterference.CheckBTSalarmlogFurtheractivities:Performdrivetestsandsitesurveys.Checkfrequencyplan,coverageandinterferenceplotsCheckoutputpowerandcellparametersettings,HighSDRAnalysis(dropreasonanalysis)8/12,ProbablereasonsofSDCCHdrop,LowSignalStrengthonDownorUplink,PoorQualityonDownorUplink,MobileError,SubscriberBehavior,CongestiononTCH,HighSDRAnalysis(dropreasonanalysis)9/12,LowSignalStrengthonDownorUplinkThereasonforpoorcoveragecouldbetoofewsites,wrongoutputpower,shadowing,noindoorcoverageornetworkequipmentfailure.Action:Checkcoverageplots.Checkoutputpower.Performdrivetests.CheckBTSalarmlogSolution:Addnewsites.Increaseoutputpower.Repairfaultyequipment.,HighSDRAnalysis(dropreasonanalysis)10/12,PoorQualityonDownorUplinkAction:CheckC/IandC/AforpossibleinterferenceCheckfrequencyplan.Checkiftheco-channelcellsareover-shooting.Performdrivetests.CheckBTSAlarmlog.CheckTRXqualitystatisticsCheckZEATSolution:Changefrequency.Useavailableradiofeatures.Tiltantenna/reduceantennaheight/outputpower,etc.forco-channelcells.,HighSDRAnalysis(dropreasonanalysis)11/12,MobileErrorSomeoldmobilesmaycausedroppedcallsifcertainradionetworkfeaturesareused.AnotherreasonsisthattheMSisdamagedandnotworkingproperly.Action:CheckMSspecifications.,SubscriberBehaviorPoorlyeducatedsubscriberscouldusetheirhandsetsincorrectlybynotraisingantennas,choosingill-advisedlocationstoattemptcalls,etc.Action:CheckcustomercomplaintsandtheirMS.,HighSDRAnalysis(dropreasonanalysis)12/12,BatteryFlawWhenasubscriberrunsoutofbatteryduringcall,itwillberegisteredasdroppedcallduetolowsignalstrength.,CongestiononTCHTheSDCCHisdroppedwhencongestiononTCH.Action:CheckTCHcongestionCheckavailabilitySolution:IncreasecapacityonTCHorusingfeatureslikeDirectedRetry,HighCDRAnalysis(TCHcallcounters)2/8,TCHrequests,call,TCHREQUESTS/C1010tch_request,TCHREQUESTSFORNEWCALL/trf_18atch_call_req-trf_49,TCHSEIZURESFORNEWCALL/c1009tch_norm_seiz,DROUTSUCC/dr_3msc_o_sdcch_tch+bsc_o_sdcch_tch,BLOCKEDCALLS/blck_9btch_call_req-trf_49-tch_norm_seiz-dr_3-dr_5,TCHREQUESTSFORHO/ho_14btch_request-tch_call_req-tch_fast_req-trf_50,TCHREQUESTSFORFCS/c1043tch_fast_req,DRintraSUCC(IUOopt.feature)/dr_5cell_sdcch_tch,TOQUEUE/c1016tch_qd_call_att,UNSERVEDQUEUEDCALLREQ(timerexpiryorhigherpriorityqueuer)/c1024unsrv_qd_call_att,REMOVALFROMQTODR/removal_from_que_due_to_dr1173(S8),MSMOVEDTOTCH/c1148(S7)ms_tch_succ_seiz_assign_cmplt,HighCDRAnalysis(TCHHOcounters)5/12,TCHREQUESTS/C1010tch_request,TCHREQUESTSFORNEWCALL/c1026tch_call_req,TCHSEIZURESFORHO(incl.DRin)/c1008tch_ho_seiz,BLOCKEDHOS/blck_10bho_14b-tch_ho_seiz,TCHHOBLOCKING(blck_11c)=100*blck_10b/ho_14b%,TCHREQUESTSFORFCS/c1043tch_fast_req,SUCC.QUEUEDTCHHOREQ/que_5tch_qd_ho_att-unsrv_qd_ho_att,SUCC.NONQUEUEDTCHHOREQ/que_6tch_ho_seiz-que_5,TCHREQUESTSFORHO/ho_14btch_request-tch_call_req-tch_fast_req-trf_50,TCHFCSSEIZUREATTEMPTS/c1098(S5)tch_seiz_att_due_sdcch_con,TCHFCSSEIZURES/c1099(S5)tch_seiz_due_sdcch_con,BLOCKEDTCHFCSSEIZURES/blck_18tch_seiz_att_due_sdcch_con-tch_seiz_due_sdcch_con,TCHREQUESTSFORNEWCALL/trf_18atch_call_req-trf_49,HighCDRAnalysis(Nokiadropcounters)5/12,Droppedcallreports,SDCCHDropcounters,TCHDropcounters,163,166,SDCCHobservations,TCHobservations,“CallrelatedDXcausesinBSC”,217,207or216(toseehourlybreakdownofCSF),HighCDRAnalysis(RE_ESTcounters)5/12,DroponTCHandcallre-establishment,SDCCHREQUESTS/c1000sdcch_seiz_att,SEIZURESFORCALLSANDLU/c1007sdcch_assign,MOC(incl.SMS)/c3013succ_seiz_orig,MTC(incl.SMS)/c3012succ_seiz_term,EMERGENCYCALL/c3021sdcch_emerg_call,CellA,Oneofthesetriggered,Callre-establishmentexecuted,TCHREQUESTS/c1010tch_request,TCHREQUESTSFORNEWCALL/c1026tch_call_req,TCHSEIZURESFORNEWCALL/c1009tch_norm_seiz,Calldrops,oneofTCHfailcountersistriggeredTCH_RADIO_FAIL/c1013orTCH_USER_ACT/c1048orTCH_BCSU_RESET/c1049orTCH_NETW_ACT/c1050orTCH_BTS_FAIL/c1047orTCH_LAPD_FAIL/c1046orTCH_A_IF_FAIL_CALL/c1087orTCH_ABIS_FAIL_CALL/c1084orTCH_TR_FAIL/c1029orTCH_ACT_FAIL_CALL/c1081,NOTE!Callre-establishmentcanbeexecutedmorethanonce.,SDCCHREQUESTS/c1000sdcch_seiz_att,SEIZURESFORCALLSANDLU/c1007sdcch_assign,CellA,TCH,CALLRE-EST./c3020sdcch_call_re_est,RE-EST.ASSGN./c57022(S7)sdcch_re_est_assign,RE-EST.RELEASE/c57026(S7)sdcch_re_est_release,RE-EST.ASSGNONTCH/c57032(S7)tch_re_est_assign,RE-EST.RELEASEONTCH/c57037(S7)tch_re_est_release,orincaseofSDCCHcongestion,FACCHcallsetupismade,NOTE:Failedre-establishedcallsarecountedbyclearcode208HofNokiaMSC.,HighCDRAnalysis(DRcounters)5/12,TCHREQUESTS/c1010tch_request,TCHREQUESTSFORNEWCALL/c1026tch_call_req,TCHSEIZURESFORHO(incl.DRin)/c1008tch_ho_seiz,DROUTSUCC/DR_3msc_o_sdcch_tch/c4050orbsc_o_sdcch_tch/c4065,CellA(source),TCHREQUESTS/c1010tch_request,CellB(target),DRINATT/DR_2msc_i_sdcch_tch_at/c4047orbsc_i_sdcch_tch_at/c4060,DR(SDCCH-TCHHO)TOCELLB,TCHcongestion,DROUTATT/DR_1msc_o_sdcch_tch_at/c4053orbsc_o_sdcch_tch_at/c4068,DRINSUCC/DR_4msc_i_sdcch_tch/c4044orbsc_i_sdcch_tch/c4057,IncaseofnormalDRtch_norm_seiz(1009)counterisnottriggeredatall.,IfnormalDRfails,sdcch_radio_fail_old(1004)istriggered.,IncaseofnormalDRtch_req_rej_lack(1011)counterisnottriggeredatall.,TCHrequestandnormalDR,HighCDRAnalysis(TCHdropstatistics)5/12,TCHdropcallratio,arealevel,209,Arealevel,162,AllBSCs,200,204,BSClevel,Difference=Improvementbycallre-establishment,HighCDRAnalysis(TCHdropstatistics)5/12,BTShitlistlevel,163,216,217,TCHObservation,WhichBTSshaveproblems?,Whatcauses?,BTSlevel,HowthesuspectedBTShasperformed?,Dropcalltrace,225(underdevelopment),TCHdropcallratio,BTSlevel,HighCDRAnalysis(congestionstatistics)5/12,TCHcongestionandblocking,Arealevel,BTSHitList,138,216,BTSlevel,Callblockinglatesformula:blck_8c,200,135,HighCDRAnalysis(dropreason)5/12,ProbablereasonsofTCHdroppedcalls,LowSignalStrengthonDL/UL,LackofBestServer,Congestioninneighboringcells,DragonSite,MobileError,SubscriberBehavior,EquipmentFailure,TransmissionProblems,SynchronizationProblems,BatteryFlaw,PoorQualityonDownorUplink,Antennaproblems.,LowBTSOutputPower,WrongPowerControlParameterSetting,MissingNeighboringCellDefinitions,UnsuccessfulOutgoing/IncomingHandover,HighCDRAnalysis(dropreason)5/12,LowSignalStrengthonDownorUplinkNormallyacallisdroppedwithinsufficientcoveragecoverageholes.Garage,elevatororevenbehindastreetcornerBadindoorcoveragereason.Action:Checkcoverageplots.Performdrivetests&sitesurvey.Checkoutputpower.CheckpowerbalanceandlinkbudgetCheckifomnisite.Checkantennaconfiguration&type.CheckantennainstallationSolution:Addarepeatertoincreasecoverageinforexampleatunnel.Changetoabetterantenna(withhighergain)forthebasestation.Addanewbasestationiftherearelargecoverageholes.,HighCDRAnalysis(dropreason)5/12,CongestioninneighboringcellsIfthereexistscongestioninneighboringcells,themovingmobilemaynothandovertoneighboringcellsuntilthecalldropped.Action:CheckTCHcongestionofneighboringcellsGiantSiteAgiantsitemeansahighsituatedsitewithcoverageoveravastarea.Thesitemighthavelineofsitetoseveralotherbasestations.Thehighsitemakesitdifficulttoplanthefrequenciesastherearealotofpossibilitiesofco-channelinterference.Action:Checksitelocation.Solution:Removedragonsiteorreconfigurethesite.,HighCDRAnalysis(dropreason)5/12,PoorQualityonDownorUplinkAction:CheckC/IandC/Aplots.CheckInterferenceCheckifco-channelsiteisover-shootingSolution:Improveinterference.Changefrequency,tiltantenna,changeoutputpower,lowerantenna,usefrequencyhoppingorotherfrequencyaveragingradionetworkfeatures,etc.Checkifthesitehasovercoverage,i.e.goodcoverageatlargedistancesduetohigheffectiveantennaheight.,HighCDRAnalysis(dropreason)5/12,Antennaproblems.Theuseofonlyonereceiverantennawillreducetheuplinkquality.Abadinstallationwithatoosmallseparationbetweentworeceivingantennasmayreducetheeffectofdiversity.Alarmslike7941,7942,7943willindicatetheantennaissufferingproblems.Action:Checkantennainstallation.CheckiftheantennasVSWRCheckthediversityparameterinBSC(RDIVforultrasite)CheckBTSerrorlogandAntennaAlarmsDodrivetest,HighCDRAnalysis(dropreason)5/12,MissingNeighboringCellDefinitionsAction:Checkparametersetting.CheckHandoverPerformanceSolution:Addmissingneighborsandcorrectparameterserrors.,HighCDRAnalysis(dropreason)5/12,WrongPowercontrolParameterSettingAction:Checkparametersetting.Solution:Correctparametersetting,UnsuccessfulHandover,EitherthemobilestationneverreceivedtheHandoverCommandoritfailedbothtoestablishitselfonthetargetcellandtore-establishitselfontheoriginatingcell.,Probablereasonislowsignalstrengthorhighinterference.,Action:CheckHandoverPerformance,HighHOFRAnalysis(hofailurereason),Handoverperformanceanalysis,FewHandoverAttempts,UnsuccessfulHandovers,HandoverReversions,UnsuccessfulInter-MSCHandovers,Ping-PongHandovers,UrgencyHandovers,Intra-CellHandoverPerformance,HighHOFRAnalysis(hofailurereason),Thefollowingchecksshouldbeperformed:1.Checkforhandoverrelationswithlowtraffic(e.g.lessthan10%ofaveragenumberofhandoversperrelation).Performdrivetestandsitesurvey2.Checkforunbalancedhandoverrelations(e.g.relationswhichhavenotapproximatethesamenumberofhandoversineitherdirection.Remark:Unbalancedhandoversrelationindicateproblemifmeasuredonwholedays,assumingthatthesamenumberofpeoplegoinandoutofthecellcoveragearea.3.Checkifthereasonforunbalancedhandoveriscongestion.,FewHandoverAttempts,Possiblereasons:,BadHandoverParameterSetting,UnnecessaryNeighboringCellRelation,TheBaseStationisDefinedButNotinService.,HWfaults,MissedmeasurementfrequenciesinBA-list,PermittedNetworkColorCodeproblem,Poorinter-MSC/BSChandoverperformance,HighHOFRAnalysis(hofailurereason),UnsuccessfulHandovers,-Therecanbetworeasonswhyanattemptiscountedasunsuccessful:eitherthemobilestationwaslostorthecallwasrevertedtotheoldcellandchannel.-Unsuccessfulhandovermayleadtoadroppedcall.-Investigateifthereisanydifferencebetweenincomingandoutgoinghandovers.-Thiscangivefurtherreasonsoftheproblemarea.-Thelosthandoversareregisteredatoutgoinghandover.Notethatalsodroppedcallcountersarestepped.,Possiblereasons:,Congestion,BadAntennaInstallation,AntennasConnectedtoWrongFeeder,TheMSMeasuresSignalStrengthofAnotherCo-orAdjacentCellthanPresumed.,WrongNeighboringCellisDefined.,MissingHandoverRelations,WrongOutputPowerduetoFaultyTransceiver.,Poorinter-MS