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1、HandoverparameteroptimizationinLTEself-organizingnetworksThomasJansen?,IrinaBalan?,JohnTurk?,IngridMoerman?,ThomasKurner¨??TechnischeUniversitatBraunschweig,Braunschweig,Germany,¨{jansen;kuerner}@ifn.ing.tu-bs.de?InterdisciplinaryInstituteforBroadbandTechnology,Ghent,Belgium,{
2、irina.balan;ingrid.moerman}@intec.ugent.be?VodafoneGroup,Newbury,England,john.turk@vodafone.comAbstract—Thispaperpresentsaself-optimizingalgorithmthatTheworkhasbeencarriedoutintheEUFP7SOCRATEStunesthehandover(HO)parametersofaLTE(Long-Termproject[3][4].Evolution)basestationinor
3、dertoimprovetheoverallnetworkperformanceanddiminishnegativeeffects(calldropping,HOII.METRICSfailures).TheproposedalgorithmpicksthebesthysteresisandThemetricsthatareusedinthehandoverparameterop-time-to-triggercombinationforthecurrentnetworkstatus.Weexaminedtheeffectsofthisself-
4、optimizingalgorithminarealistictimisationalgorithmaresubdividedinsystemmetrics,con-scenariosettingandtheresultsshowanimprovementfromthetrolparametersandassessmentmetrics.Thereferencesignalstaticvaluesettings.receivedpower(RSRP)andsignal-to-interferenceandnoiseratio(SINR)aresys
5、temmetrics.TheyareusedtoselecttheI.INTRODUCTIONconnectedcellandpossiblehandovercandidates.ThecontrolHandoverisoneofthekeyproceduresforensuringthatparametersaretunedbytheoptimizationalgorithmtoincreasetheusersmovefreelythroughthenetworkwhilestillbeingthehandoverperformanceofthe
6、network.Theassessmentconnectedandbeingofferedqualityservices.Sinceitssuccessmetricsareusedasmeasurementsduringtheoptimizationrateisakeyindicatorofusersatisfaction,itisvitalthatthisprocessandasperformanceindicatorsfortheoptimizationprocedurehappensasfastandasseamlesslyaspossibl
7、e.algorithmevaluation.ThemetricsaredescribedindetailIncurrentlydeployedmobilenetworks,handover(HO)below.optimisationisdonemanuallyoveralongtimeframe,e.g.A.Systemmetricsdaysorweeks,onaneedbasisonly.ThisapproachisbothtimeRSRPconsumingandmaynotbecarriedoutasoftenasneeded.Byintrod
8、ucinganonlineself-optimisingalgorithmthatwilltuneTheRSRPiscal
