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.
出版日期
2014年01月11日（中国期刊网平台首次上网日期，不代表论文的发表时间）
