Designation:E2213−03(Reapproved2010)StandardSpecificationforTelecommunicationsandInformationExchangeBetweenRoadsideandVehicleSystems—5GHzBandDedicatedShortRangeCommunications(DSRC)MediumAccessControl(MAC)andPhysicalLayer(PHY)Specifications1ThisstandardisissuedunderthefixeddesignationE2213;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thisspecification2describesamediumaccesscontrol(MAC)andphysicallayer(PHY)specificationforwirelessconnectivityusingdedicatedshort-rangecommunications(DSRC)services.ThisstandardisbasedonandreferstoIEEEStandards802.11,WirelessLANMediumAccessControlandPhysicalLayerSpecifications,and802.11a,WirelessLANMediumAccessControlandPhysicalLayerSpecificationsHigh-SpeedPhysicalLayerinthe5GHzBand,withpermis-sionfromtheIEEEsociety.ThisspecificationismeanttobeanextensionofIEEE802.11technologyintothehigh-speedvehicleenvironment.Aspresentedhere,thisspecificationcontainsjustenoughinformationtoexplainthedifferencebetweenIEEE802.11andIEEE802.11aoperatingparametersrequiredtoimplementamostlyhigh-speeddatatransferserviceinthe5.9-GHzIntelligentTransportationSystemsRadioService(ITS-RS)Band.PotentialoperationswithintheUnlicensedNationalInformationInfrastructure(UNII)Bandarealsoaddressed,asappropriate.1.2Purpose—Thepurposeofthisspecificationistoprovidewirelesscommunicationsovershortdistancesbetweeninfor-mationsourcesandtransactionsstationsontheroadsideandmobileradiounits,betweenmobileunits,andbetweenportableunitsandmobileunits.Thecommunicationsgenerallyoccuroverline-of-sightdistancesoflessthan1000mbetweenroadsideunitsandmostlyhighspeed,butoccasionallystoppedandslowmoving,vehiclesorbetweenhigh-speedvehicles.Thisspecificationalsooffersregulatorybodiesameansofstandardizingaccesstothe5.9GHzfrequencybandforthepurposeofinteroperablecommunicationstoa...
