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1、AnImprovedHandoverAlgorithmforSchedulingServicesinIEEE802.16eGuojunDong,JufengDaiSchoolofElectronicInformationEngineering,TianjinUniversityWeijinRoad,NankaiDistrict,Tianjin,300072,ChinaAbstract—InIEEE802.16e,handovermeansthatanMSlevelsofassociationsfornetworktopolo
2、gyacquisitionprocess(MobileSubscirber)migratesfromthenetworkservedbyoneBSincludinghandoverinassociationlevel0,handoverin(BaseStation)tothenetworkservedbyanotherBS.Schedulingassociationlevel1,handoverinassociationlevel2.Occurringservicesrepresentthedatahandlingmecha
3、nismsdeterminedbyduringscanningintervalofhandover,associationisaninitialasetofQoSparametersthatquantifythetransmission.TakingrangingprocedurewhichenablestheMStoacquireandrecordfivetypesofschedulingservicesintoconsideration,UGSrangingandserviceparametersofneighborin
4、gBSs.But,in(UnsolicitedGrantedScheduling),rtPS(Real-TimePollingIEEE802.16e,thereisnocompletehandoveralgorithmforScheduling),ertPS(ExtendedReal-TimePollingScheduling),schedulingservices.What’more,MDHO,FBSS,andthreenrtPS(Non-Real-TimePollingScheduling)andBE(BestEffor
5、t),levelsofassociationsareallindividualsubsystemsinsteadofthispaperanalyzesfivetypesofhandovermechanisms.Anditanintegratedhandoveralgorithm.Especiallythetradeoff,proposesanimprovedhandoveralgorithmbydynamicallybetweentrafficrequirementanddelaycharacteristicofselect
6、inganoptimalhandovermechanismfordifferenthandover,hasnotbeenfocusedon.Thus,ahigh-efficientschedulingservices,whichminimizesthetrafficrequirementofhandoverprocesswithguaranteeddelayperformance.Analysishandoveralgorithmbasedonschedulingservicesshouldberesultsshowthat
7、,withqualifiedQoSperformance,theusageofproposedtosupportthemobilitycapacity.transmissionresourceisimprovedusingtheproposedhandoverSofar,afewpapers,[3],[4],havedealtwithstudiesaboutalgorithm.handoveralgorithmsinIEEE802.16e.In[3],fasthandoverschemeforreal-timedownlin
8、kservicesusingfastKeywords-IEEE802.16e,Handover,SchedulingServices,DL_MAP_IEissuggested.ItproposedtoallowforwarddataServingBS,DivisitySet,AnchorB