gjb 2213-1994 直流小电流标准源检定规程

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1、Designation:E2213–02StandardSpecificationforTelecommunicationsandInformationExchangeBetweenRoadsideandVehicleSystems—5GHzBandDedicatedShortRangeCommunications(DSRC)MediumAccess1Control(MAC)andPhysicalLayer(PHY)SpecificationsThisstandardisissuedunderthe®xeddesignationE221

2、3;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(e)indicatesaneditorialchangesincethelastrevisionorreapproval.1.ScopeDSRC

3、andIEEE802.11compliantdevicetooperateina1.1Thisspeci®cation2describesamediumaccesscontrolhigh-speedmobileenvironment.(MAC)andphysicallayer(PHY)speci®cationforwireless1.3.2ReferstoIEEE802.11MACprocedures.connectivityusingdedicatedshort-rangecommunications1.3.3De®nesthe5

4、.9-GHzDSRCsignalingtechniqueand(DSRC)services.ThisstandardisbasedonandreferstoIEEEinterfacefunctionsthatarecontrolledbytheIEEE802.11Standards802.11,WirelessLANMediumAccessControlandMAC.PhysicalLayerSpeci®cations,and802.11a,WirelessLAN1.3.4PermitstheoperationofaDSRCorIE

5、EE802.11MediumAccessControlandPhysicalLayerSpeci®cationsconformantdevicewithinawirelesslocalareanetwork(LAN)High-SpeedPhysicalLayerinthe5GHzBand,withpermis-thatmaycoexistwithmultipleoverlappingDSRCcommuni-sionfromtheIEEEsociety.Thisspeci®cationismeanttobeancationzoneso

6、rIEEE802.11wirelessLANs.extensionofIEEE802.11technologyintothehigh-speed1.3.5Describestherequirementsandprocedurestoprovidevehicleenvironment.Aspresentedhere,thisspeci®cationprivacyofuserinformationbeingtransferredoverthewirelesscontainsjustenoughinformationtoexplainth

7、edifferencemedium(WM)andauthenticationoftheDSRCorIEEEbetweenIEEE802.11andIEEE802.11aoperatingparameters802.11conformantdevices.requiredtoimplementamostlyhigh-speeddatatransfer2.ReferencedDocumentsserviceinthe5.9-GHzIntelligentTransportationSystemsRadioService(ITS-RS)Ba

8、ndortheUnlicensedNational2.1IEEEStandards:InformationInfrastructure(UNII)Band,asappropriate.802.11WirelessLANMediumAc