Designation:E2213-03 INTERNATIONAL Standard Specification for Telecommunications and Information Exchange Between Roadside andVehicleSystems-5 5 GHz Band Dedicated ShortRange Communications(DSRC)MediumAccess Control (MAC) and Physical Layer (PHY) Specifications1 This standard is issued under the fixed designation E 2213; the number immediately following the designation indicates the year of original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A superscript epsilon (e) indicates an editorial change since the last revision or reapproval. 1. Scope 1.3 Specifically, this specification accomplishes the follow- 1.1 This specification? describes a medium access control ing: 1.3.1 Describes the functions and services required by a (MAC) and physical layer (PHY) specification for wireless DSRC and IEEE 802.11 compliant device to operate in a connectivity using dedicated short-range communications high-speed mobile environment. (DSRC) services. This standard is based on and refers to IEEE 1.3.2 Refers to IEEE 802.11 MAC procedures Standards 802.11, Wireless LAN Medium Access Control and 1.3.3 Defines the 5.9 GHz DSRC signaling technique and Physical Layer Specifications, and 802.11a, Wireless LAN interface functions that are controlled by the IEEE 802.11 Medium Access Control and Physical Layer Specifications High-Speed Physical Layer in the 5 GHz Band, with permis- MAC. 1.3.4 Permits the operation of a DSRC conformant device sion from the IEEE society. This specification is meant to be an within a DSRC communications zone that may coexist with extension of IEEE 802.11 technology into the high-speed multiple overlapping DSRC communication zones. vehicle environment. As presented here, this specification 1.3.5 Describes the requirements and procedures to provide contains just enough information to explain the difference between IEEE 802.11 and IEEE 802.1la operating parameters privacy of user information being transferred over the wireless medium and authentication of the DSRC or IEEE 802.11 required to implement a mostly high-speed data transfer conformant devices. service in the 5.9-GHz Intelligent Transportation Systems Radio Service (ITS-RS) Band. Potential operations within the 2. Referenced Documents Unlicensed National Information Infrastructure (UNII) Band 2.1 IEEE Standards: are also addressed, as appropriate. 802.11 Wireless LAN Medium Access Control (MAC) and 1.2 Purpose—The purpose of this specification is to provide Physical Layer (PHY) Specifications3 wireless communications over short distances between infor- 802.1la Wireless LAN Medium Access Control (MAC) and mation sources andtransactions stationsontheroadsideand Physical Layer (PHY) Specifications—Amendment 1: mobile radio units, between mobile units, and between portable High-Speed Physical Layer in the 5 GHz Band3 units and mobile units. The communications generally occur 2.2 Federal Document: over line-of-sight distances of less than 1o00 m between CFR 47 Title 47 on Telecommunication4 roadside units and mostly high speed, but occasionally stopped and slow moving,vehicles or between high-speed vehicles. 3. Terminology This specification also offers regulatory bodies a means of 3.1 Definitions—See IEEE 802.11, Clause 3, in addition to standardizing access to the 5.9 GHz frequency band for the the following information: purpose of interoperable communications to and between 3.1.1onboardunit(OBU) an onboard unit(OBU)isa vehicles at line-of-sight distances on the roadway. DSRC transceiver that is normally mounted in or on a vehicle, butwhichinsomeinstancesmaybeaportableunit.AnOBU can be operational while a vehicle or person is either mobile or 1 This specification is under the jurisdiction of ASTM Committee E17 on stationary. The OBUs receive and contend for time to transmit Vehicle-Pavement Systems and is the direct responsibility of Subcommitee E17.51 on Vehicle Roadside Communication.