IEEE802.11paheadofLTE-V2VforsafetyapplicationsAlessioFilippi,KeesMoerman,VincentMartinezandAndrewTurley–NXPSemiconductors.OnnHaranandRonToledano–Autotalks.ExecutiveSummaryCar-to-carcommunicationisattractingsignificantattentionasitpromisestodrasticallyreduceroadfatalities,im-provemobilityandenableahigh-levelofvehicleautomation.Supportingsafetycriticalapplicationsisatthecoreofcar-to-carcommunication,andforyears,thetechnologyofchoiceforV2XhasbeenIEEE802.11p.Recently,anewstandardaddressingV2Xapplicationshasstartedevolvingundertheumbrellaof3GPP,whosefocusismobilebroadbandstandardization.Becausethesafetyofmillionsofroaduserswilldependontheperformanceofthesetechnologies,itisimportanttocomparethem.ThereareseveralrelevantfactsimportanttohighlightwhencomparingIEEE802.11ptoLTE-V2X:•IEEE802.11pisreadynow,LTE-V2Xisnot[4].Today,IEEE802.11p-basedproductsareavailableonthemarketfrommultiplesiliconvendors.SomeTier1shavecompletesolutionsavailable.Incontrast,thereisnoLTE-V2Xproductavailableinthemarkettoday,anditwillmostlikelytakeseveralyearsbeforeacompletesolutionwillbereadyandtested.Thepromised5GversionofV2Xwillhaveanevenlongertimehorizon;•IEEE802.11pisalreadyinstalledincarsontheroad.Anend-usercanbuyavehicle(e.g.GMCadillac1)equippedwithIEEE802.11ptechnologytoday;•TheV2VNPRMhasbeenpublished[1].ItclearlyindicatesthattheUSGovernmentapparentlyhastheintentiontodeployIEEE802.11pasatechnologythoroughlytested,validatedandavailableforsafetycriticalapplications;•IEEE802.11pmassdeploymentcouldbeginsoon.Volkswagen,oneofthelargestcarmanufacturersworldwide,publiclyannouncedthatfrom2019onwards,theywillequiptheirfirstmodelserieswithIEEE802.11ptechnology2.ThecellularcommunityisadvocatingthatV2Ximplementationsshouldwaitforcellulartechnologytobereadyandtested,anddisregardtheinvestmentsandfieldtestsdonetovalidateIEEE802.11pforsafetycriticalapplications.Moreconcretely,thecellularcommunityclaimsthatLTE-V2Xoffers:•astrongcellulareco-systemwhichleveragesyearsofexperienceinprovidingpaid-servicesanda...
