ResearchArticleDSRCversus4G-LTEforConnectedVehicleApplications:AStudyonFieldExperimentsofVehicularCommunicationPerformanceZhigangXu,1XiaochiLi,1XiangmoZhao,1MichaelH.Zhang,2andZhongrenWang31SchoolofInformationEngineering,Chang’anUniversity,No.435,TheMiddleSectionofSouth2nd-RingRoad,Xi’an,Shaanxi710064,China2DepartmentofCivilandEnvironmentalEngineering,UniversityofCalifornia,Davis,3145GhausiHall,OneShieldsAvenue,Davis,CA95616,USA3CaliforniaDepartmentofTransportation,DivisionofMaintenance,Headquarters,2389GatewayOaksDrive,No.200,MS91,Sacramento,CA958833,USACorrespondenceshouldbeaddressedtoXiangmoZhao;xmzhao@chd.edu.cnReceived14April2017;Accepted3July2017;Published23August2017AcademicEditor:XiaoboQuCopyright©2017ZhigangXuetal.ThisisanopenaccessarticledistributedundertheCreativeCommonsAttributionLicense,whichpermitsunrestricteduse,distribution,andreproductioninanymedium,providedtheoriginalworkisproperlycited.Dedicatedshort-rangecommunication(DSRC)and4G-LTEaretwowidelyusedcandidateschemesforConnectedVehicle(CV)applications.ItisthusofgreatnecessitytocomparethesetwomostviablecommunicationstandardsandclarifywhichonecanmeettherequirementsofmostV2Xscenarioswithrespecttoroadsafety,trafficefficiency,andinfotainment.Tothebestofourknowledge,almostalltheexistingstudiesoncomparingthefeasibilityofDRSCorLTEinV2Xapplicationsusesoftware-basedsimulations,whichmaynotrepresentrealisticconstraints.Inthispaper,aConnectedVehicletest-bedisestablished,whichintegratestheDSRCroadsideunits,4G-LTEcellularcommunicationstations,andvehicularon-boardterminals.ThreeConnectedVehicleapplicationscenariosaresetasCollisionAvoidance,TrafficTextMessageBroadcast,andMultimediaFileDownload,respectively.AsoftwaretoolisdevelopedtorecordGPSpositions/velocitiesofthetestvehiclesandrecordcertainwirelesscommunicationperformanceindicators.Theexperimentshavebeencarriedoutunderdifferentconditions.Accordingtoourresults,4G-LTEismorepreferredforthenonsafetyapplications,suchastrafficinformationtransmission,filedownload,...
