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TD-SCDMA网络优化中KPI指标问题分析.docx

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TD-SCDMA网络优化中KPI指标问题分析 1.Introduction Asoneofthecommonlyusedmobilecommunicationtechnologies,TD-SCDMA(TimeDivision-SynchronousCodeDivisionMultipleAccess)hasbeenwidelyusedinChina.Alongwiththedevelopmentofmobilecommunicationtechnologies,optimizingtheperformanceofTD-SCDMAnetworkisbecomingmoreandmoreimportant.Thekeyperformanceindicators(KPIs)areusuallyusedtoevaluatetheperformanceofTD-SCDMAnetwork,anditiscriticaltomonitorandanalyzetheseKPIstoidentifyandsolveproblems.ThispaperaimstoanalyzetheissuesrelatedtoTD-SCDMAnetworkoptimizationbasedontheKPIs. 2.TD-SCDMANetworkArchitecture Firstly,itisnecessarytointroducetheTD-SCDMAnetworkarchitecture.TD-SCDMAsystemiscomposedofNodeB(basestation),RNC(RadioNetworkController),CoreNetwork,andUserEquipment(UE).TheTD-SCDMAsystememploysauniqueTimeDivisionSynchronousCodeDivisionMultipleAccess(TD-SCDMA)technology,whichusesdifferentspreadingcodesfordifferentusers,andtime-divisionmultiplexingwithsynchronoustransmissionmethod,toachievehigh-speedwirelessdatatransmission. 3.TD-SCDMANetworkKPIs 3.1CallSetupSuccessRate(CSSR) CSSRrepresentsthepercentageofsuccessfulcallsestablishedinTD-SCDMAnetwork.ThisKPIisinfluencedbymanyfactors,suchasinterference,coverage,handover,andcongestion.CSSRiscriticaltotheuserexperience,andlowCSSRwillleadtocustomerdissatisfaction. 3.2DropCallRate(DCR) DCRrepresentsthepercentageofcallsdroppedinTD-SCDMAnetworkduetovariousreasons,suchasradiolinkfailure,callrelease,andnetworkcongestion.DCRisacriticalKPIthatindicatesthenetworkstabilityandreliability. 3.3NetworkAccessibility NetworkaccessibilityrepresentstheabilityoftheTD-SCDMAnetworktoprovideservicestousers.ThisKPIcanreflectthecomprehensiveperformanceofTD-SCDMAnetwork,includingcoverage,capacity,andefficiency.Networkaccessibilitycanbeevaluatedbymeasuringthenumberofconnectionrequestsandcallcompletions. 3.4HandoverSuccessRate(HSR) HSRrepresentsthepercentageofsuccessfulhandoversinTD-SCDMAnetworkfromonecelltoanother.Handoverisessentialtoensureseamlesscoverageandhigh-qualityservicesfor