Delay-aware reliable broadcast scheme based on power control for VANETs-中国期刊网

摘要 InvehicularAd-hocnetwork(VANET),manymulti-hopbroadcastschemesareemployedtowidelypropagatethewarningmessagesamongvehiclesandthekeyistodynamicallydeterminetheoptimalrelayvehicleforretransmission.Inordertoachievereliableandfastdeliveryofwarningmessages,thispaperproposesadelay-awareandreliablebroadcastprotocol(DR-BP)basedontransmitpowercontroltechnique.First,acomprehensivemodelisderivedtoevaluatethetransmissioninvehicle-to-vehiclecommunications.Thismodelconsidersthewirelesschannelfading,transmissiondelayandretransmissionscharactersoccurringinthephysicallayer/mediumaccesscontrol(PHY/MAC)layer.Then,alocaloptimalrelayselectionmechanismbasedontheabovemodelisdesigned.InDR-BPscheme,onlythevehicleselectedastheoptimalrelayscanforwardwarningmessagesandthetransmitpoweristime-varying.Finally,extensivesimulationsverifytheperformanceofDR-BPunderdifferenttrafficscenarios.SimulationresultsshowthatDR-BPoutperformsthetraditionalslotted1-persistence(S1P)andfloodingschemeintermsofpacketsdeliveryratioandtransmissiondelay.

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Delay-aware reliable broadcast scheme based on power control for VANETs

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Delay-aware reliable broadcast scheme based on power control for VANETs

来源期刊

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