《tems基础知识》PPT课件.ppt

August11 2000 JimLuan LinMubao DriveTestLoganalysis 2020 2 15 2 DriveTestProcedure DriveTest Netplan FICS StatisticsAnalysis ProblemFinding VOT GEP Preparation 2020 2 15 3 Preparation 1 DefinitionFileWithoutit itisimpossibletoobserveovershooingneighborsGenDef7 execanconvertFPtodefinitionfile Neighborlistwithdefinitionfile Neighborlistwithoutdefinitionfile 2020 2 15 4 Preparation 2 FrequencyPlan ConfigurationmapSoftware TEMS FICS GEP VOTHardware TEMS GPS PortablePCTestProblemSheetRouteMap 2020 2 15 5 DriveTest ForBenchmark2minutespercall10 15minutesalogfilesForcetoappropriateband GSMonly DCSonlyorDual ForSpecialProblemPlanningrouteNolimitation 2020 2 15 6 TEMSIntroduction InterfaceFunctions 2020 2 15 7 LogFileProcess TEMSLogFile NetPlan FICS VOT GEP CSV FMT RouteMap STA ExcelVB NP TXT MuchshortercycletimebyVOTandGEP 2020 2 15 8 TEMS logfileAnalysis UndecodedBCCHBSICUndecodeinOtherSiteNoHandoverDelayHandoverPingPongHandoverNegativeHandoverOvershootingHighOverlappingNoDominantServer PoorCoverageUnreasonableServingAreaInterferenceHandoverFailureHandoverLossULDropDropCallSuddenPowerDropMSPowerRapidIncrease BelowlistscommonproblemswhichcanbeobservedfromDriveTestLog 2020 2 15 9 UndecodedBCCH 1 Description BSICscan tbedecodedin5sUsuallyconsider3strongestneighborsReason GCLKshift onlydecodesamesiteBSICsChannelinterferenceNon BCCHcarrier nodedicatedspectrumforBCCH 2020 2 15 10 UndecodedBCCH 2 2020 2 15 11 BSICUndecodeinOtherSite Description BSICinsamesitecanbedecodedbutnotforothersitesHandovercanonlyhappeninintra sitebasisItissimilartoformerUndecodedBCCHcaseReason GCLKshiftGCLKrecalibrationisrequiredNoonemonitorsOMC Ralarms 2020 2 15 12 NoHandover 1 Description NeighborBSICisdecodedandCOMMONhandoverrequirementisfulfilledbutthereisneverahandoverReason MissingneighborNosuchneighborinCMdatabaseIncorrectexternalneighborTargetcell sLAC BCCH BSICinadd neighborisdifferentfromthoseinequip rtfEngineermodifiesexternalneighboratMMI notthroughGUINeveruseOMC RProxyCelltopropagateexternalneighborinformationN hreqt GreatHO MARGIN Improperalgorithm1 7settingMissing rpt 1Servingcellovershoots coverstoofarawayRefertoGSMBSSStatisticsAnalysisHandbook 2020 2 15 13 NoHandover 2 2020 2 15 14 DelayHandover 1 Description NeighborBSICisdecodedbuthandoveroccursinmuchlatertimeReason AllpossibleneighborssufferblockingLargehreqt hreqavequal power flagisenabled fullBTS MSpowermustbereachedbeforehandoverLargehandover recognized periodandbssmap t7settingRefertoGSMBSSStatisticsAnalysisHandbook 2020 2 15 15 DelayHandover 2 2020 2 15 16 PingPongHandover 1 Description Lotofhandoversbetweencells TimebetweenHandover isaroundhreqt hreqaveofsuchHOcauseReason ImproperhardwarecalibrationHardwarefaultUL DLinterferenceNegativehandoverDifferentcoveragefootprintforantennasofacell 2020 2 15 17 PingPongHandover 2 2020 2 15 18 NegativeHandover 1 Description ServingcellhandsovertoaweakerneighborReason ho only max powerisenabledqual margin flagisdisabledho margin usage flagisenabledwithnegativeho margin rxqual rxlevNegativeHO MARGINMicro cellularalgorithmsareenabled especiallytype5 2020 2 15 19 NegativeHandover 2 59dBmbeforeHO 66dBmafterHO 2020 2 15 20 OverShooting 1 Description CellshootsatfardistancebutthatlocationhasclosercellsaroundReason Overshootingcellhassmalldowntilt 0degree OvershootingcellhastoohighaltitudeClosercellshaveovershootingaswellBSICofclosercellscan tbedecoded 2020 2 15 21 OverShooting 2 2020 2 15 22 HighOverlapping 1 Description Cellshavemajorrxleveldifferencewithin 5dBReason OvershootingToomanycellsinthatareaPoorantennadowntilt 2020 2 15 23 HighOverlapping 2 OverLappingArea 65dBm 65dBm 65dBm 65dBm 2020 2 15 24 NoDominantServer 1 Description RxlevelofbestneighborsareclosetothatofservingcellReason PoorantennadowntiltLackofnear bysite 2020 2 15 25 NoDominantServer 2 2020 2 15 26 PoorCoverage 1 Description LowrxlevelwithrxqualityInruralarea rxlevelislessthan15 95dBm Incitycenter rxlevelislessthan35 75dBm Differentlocationhasdifferentthreshold noiselevelisthekeypointReason LackofcellsiteBSICofdominantservercan tbedecodedDominantserverhasblockingorcell barHandoverproblem E g missing incorrectneighbor negativehandover no delayhandover 2020 2 15 27 PoorCoverage 2 2020 2 15 28 UnreasonableServingArea 1 Description CoverageareaofthecellisincoherenttotheantennadirectionReason WrongcableconnectiontoantennasIncorrectrecordofantennaorientationIncorrectANTENNA SELECT 2020 2 15 29 UnreasonableServingArea 2 CellID 101BCCH 35 CellID 102BCCH 40 CellID 103BCCH 45 2020 2 15 30 Interference 1 Description HighrxlevelwithrxqualityReason ChannelinterferenceNotusingdominantserverNohandoverTurnthecornerwithdelayhandover 2020 2 15 31 Interference 2 2020 2 15 32 HandoverFailure 1 Description MSfailstoreachtargetcell soreturntosourcecellMSsendsHOFAILUREandUL SABMtosourcecellandthereisresponseReason ChannelinterferencePoorcoverageExternalinterferenceatUL likewidebandrepeatorRefertoGSMBSSStatisticsAnalysisHandbook 2020 2 15 33 HandoverFailure 2 2020 2 15 34 HandoverLoss 1 Description MSfailstoreachtargetcell butcan treturntosourcecellMSsendsHOFAILUREandUL SABMtosourcecellbutnoresponseReason ChannelinterferencePoorcoverageExternalinterferenceatUL likewidebandrepeatorRefertoGSMBSSStatisticsAnalysisHandbook 2020 2 15 35 HandoverLoss 2 2020 2 15 36 Description BSSdoesn treceiveULSACCHforlink failtimesBSSstopstransmittingDLpowerReason ExternalinterferenceChannelinterferenceFaultyancillary ULpathloss DLpathlossRefertoGSMBSSStatisticsAnalysisHandbook ULDrop 1 2020 2 15 37 ULDrop 2 2020 2 15 38 DropCall 1 Description DLcase Radio link timeoutcounterdecreasesto0ULcase link failcounterdecreasesto0Layer2 BSS MSsendSABM DISCineveryT200forN200 1times andnoresponsefromrecipientReason AllcasesinthispresentationRefertoGSMBSSStatisticsAnalysisHandbook 2020 2 15 39 DropCall 2 2020 2 15 40 SuddenPowerDrop 1 Description DedicatedARFCNhassignificantnon powercontrolrxleveldifferencefromrxlevelofBCCHReason No improperTXpowercalibrationFaultyancillary Ebiner filter DifferentcablelengthsfromBTStoantennasDuetoaircombing soantennashavedifferentcoveragefootprints 2020 2 15 41 SuddenPowerDrop 2 2020 2 15 42 Description MSrapidlyincreasesitsTXpowerduetoOptimisedPowerControlorULSACCHmultiframesaren treceivedforlink fail link about to failtimesReason SuddenULinterference e g widebandrepeator channelinterferenceToomuchrapidpowerdownl rxlev ul pistoosmall MSPowerRapidIncrease 1 2020 2 15 43 MSPowerRapidIncrease 2 ULpower