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1、UMTStoWLANHandoverbasedonAPrioriKnowledgeoftheNetworksMylènePischella,FranckLebeugle,SanaBenJamaaFRANCETELECOMDivisionR&D38rueduGénéralLeclerc-92794IssylesMoulineaux-FRANCEmylene.pischella@francetelecom.comInter-systemhandoverbasedonaprioriknowledgeoftheAbstract—Mobileter
2、minalsmeasurementscapabilitiesarenetworks[7]canbeusedinordertobypassmobileterminal'sstronglimitationsthatmayimpedeseamlesshandoverfrommeasurementslimitations.Itisablindhandovermethod,thatUMTStoWLAN.Inthisarticle,weproposeaninter-systemcomputestheidentityofthemostprobablet
3、argetcellorhandovermethodthatdoesnotrequirein-linemeasurementsonAccessPointtowardswhichthemobileterminalcouldWLAN.ItidentifiesthemostprobableWLANAccessPointforperformaninter-systemhandover.Thecandidatetargetcellshandover,fromcoveragepointofview,dependingonUMTSorAccessPoin
4、tsaresortedbydescendingprobabilityofbeingsignalmeasurementsandonahandoverprobabilitydatabase.best-suitedforhandover,fromsignalstrengthpointofview.ThismethodcanbeimplementedintheRNC,orinaB3Gcommoncontroller.SimulationresultsinaWLANhotspotThehandoverprobabilityisobtainedbyc
5、ombiningdeploymentshowthathandoverbasedonaprioriknowledgeofmeasurementsontheprimarynetwork'scellsorAccessPointsthenetworksincreaseshandoversuccessrate,comparedtowiththehandoverprobabilitydatabasevalues.Noclassicalblindhandover.Itsperformancecanbeimprovedbymeasurementonthe
6、targetnetworkisrequired.optimizingthehandoverprobabilitydatabase.Besides,theproposedmethodenablestoforecasthandover'ssuccess,andInthepresentarticle,theefficiencyofinter-systemhandoveradaptaccordingly.Handoverbasedonaprioriknowledgeofthebasedonaprioriknowledgeofthenetworks
7、forhandovernetworkscanconsequentlybeintegratedintoseveralB3GfromUMTStoWLANinaWLANhot-spotdeploymenthandoveralgorithms,todecreasehandoverdelayandscenarioisassessed.complexity.Thearticleisorganizedasfollows.SectionIIdescribesinter-IndexTerms—Inter-systemhandover,UMTS,WLAN,b
8、lindsystemhandoverbasedonaprioriknowledgeofthenetworks,handover.andremindstheperformanceresultso
