1、Designation:E221303(Reapproved 2010)Standard Specification forTelecommunications and Information Exchange BetweenRoadside and Vehicle Systems 5 GHz Band DedicatedShort Range Communications(DSRC)Medium AccessControl(MAC)and Physical Layer(PHY)Specifications1This standard is issued under the fixed des
2、ignation E2213;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or rea
3、pproval.1.Scope1.1 This specification2describes a medium access control(MAC)and physical layer(PHY)specification for wirelessconnectivity using dedicated short-range communications(DSRC)services.This standard is based on and refers to IEEEStandards 802.11,Wireless LAN Medium Access Control andPhysic
4、al Layer Specifications,and 802.11a,Wireless LANMedium Access Control and Physical Layer SpecificationsHigh-Speed Physical Layer in the 5 GHz Band,with permis-sion from the IEEE society.This specification is meant to be anextension of IEEE 802.11 technology into the high-speedvehicle environment.As
5、presented here,this specificationcontains just enough information to explain the differencebetween IEEE 802.11 and IEEE 802.11a operating parametersrequired to implement a mostly high-speed data transferservice in the 5.9-GHz Intelligent Transportation SystemsRadio Service(ITS-RS)Band.Potential oper
6、ations within theUnlicensed National Information Infrastructure(UNII)Bandare also addressed,as appropriate.1.2 PurposeThe purpose of this specification is to providewireless communications over short distances between infor-mation sources and transactions stations on the roadside andmobile radio uni
7、ts,between mobile units,and between portableunits and mobile units.The communications generally occurover line-of-sight distances of less than 1000 m betweenroadside units and mostly high speed,but occasionally stoppedand slow moving,vehicles or between high-speed vehicles.This specification also of
8、fers regulatory bodies a means ofstandardizing access to the 5.9 GHz frequency band for thepurpose of interoperable communications to and betweenvehicles at line-of-sight distances on the roadway.1.3 Specifically,this specification accomplishes the follow-ing:1.3.1 Describes the functions and servic
9、es required by aDSRC and IEEE 802.11 compliant device to operate in ahigh-speed mobile environment.1.3.2 Refers to IEEE 802.11 MAC procedures.1.3.3 Defines the 5.9 GHz DSRC signaling technique andinterface functions that are controlled by the IEEE 802.11MAC.1.3.4 Permits the operation of a DSRC conf
10、ormant devicewithin a DSRC communications zone that may coexist withmultiple overlapping DSRC communication zones.1.3.5 Describes the requirements and procedures to provideprivacy of user information being transferred over the wirelessmedium and authentication of the DSRC or IEEE 802.11conformant de
11、vices.2.Referenced Documents2.1 IEEE Standards:3802.11 Wireless LAN Medium Access Control(MAC)andPhysical Layer(PHY)Specifications802.11a Wireless LAN Medium Access Control(MAC)andPhysical Layer(PHY)SpecificationsAmendment 1:High-Speed Physical Layer in the 5 GHz Band2.2 Federal Document:CFR 47 Titl
12、e 47 on Telecommunication43.Terminology3.1 DefinitionsSee IEEE 802.11,Clause 3,in addition tothe following information:3.1.1 onboard unit(OBU)an onboard unit(OBU)is aDSRC transceiver that is normally mounted in or on a vehicle,but which in some instances may be a portable unit.An OBUcan be operation
13、al while a vehicle or person is either mobile or1This specification is under the jurisdiction ofASTM Committee E17 on Vehicle-Pavement Systems and is the direct responsibility of Subcommittee E17.51 onVehicle Roadside Communication.Current edition approved April 1,2010.Published April 2010.Originall
14、yapproved in 2002.Last previous edition approved in 2003 as E2213 03.DOI:10.1520/E2213-03R10.2This specification is based on IEEE 802.11,1999 Edition and IEEE 802.11a,1999 Edition.This specification explains the DSRC parameters as an extension ofthe IEEE 802.11 and IEEE 802.11a documents.3Available
15、from Institute of Electrical and Electronics Engineers,Inc.(IEEE),445 Hoes Ln.,P.O.Box 1331,Piscataway,NJ 08854-1331,http:/www.ieee.org.4Available from U.S.Government Printing Office Superintendent of Documents,732 N.Capitol St.,NW,Mail Stop:SDE,Washington,DC 20401,http:/www.access.gpo.gov.Copyright
16、 ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 stationary.The OBUs receive and contend for time to transmiton one or more RF channels.Except where specificallyexcluded,OBU operation is permitted wherever vehicle opera-tion or human passage is permitted.The OBUs mounted invehicles are licensed by rule and communicate with roadsideunits(RSUs)and other OBUs.Portable OBUs are also licensedby rule.OBU operations in the UNII Bands follow the rules
