doc.: IEEE /476r1 Submission July 2003 Tim Godfrey, Intersil; Broady Cash, ARINCSlide 1 DSRC Study Group Introduction Dedicated Short Range Communications in the 5.9GHz band

doc.: IEEE /476r1 Submission July 2003 Tim Godfrey, Intersil; Broady Cash, ARINCSlide 2 Background In 1999, the FCC allocated 75MHz of spectrum at GHz, right above the UNII band, for a “wireless link to transfer information between vehicles and roadside systems” and between vehicle systems. Congress directed the Department of Transportation to develop a standard to insure device interoperation in the DSRC band. This standard will form the basis for the FCC rules for this band. The Federal Highway Administration chartered ASTM to do the lower layer standards development. –DSRC standard ASTM E is based on a

doc.: IEEE /476r1 Submission July 2003 Tim Godfrey, Intersil; Broady Cash, ARINCSlide 3 FCC Status Spectrum allocated in 1999 NPRM on rules underway in 2003 –Comments have been filed –Non-controversial, general agreement to approach and use of ASTM E2213 standard as basis for rules. Ruling expected by end of 2003

doc.: IEEE /476r1 Submission July 2003 Tim Godfrey, Intersil; Broady Cash, ARINCSlide 4 ASTM DSRC Standard Status ASTM E is based on a –Was published in 2002 ( –2003 revision completed ballot in June 2003 –2003 revision to be published in August 2003 Written as an amendment to the a amendment –Significant PHY changes, but specifically designed to allow industry standard a chips to support DSRC –Minor MAC function additions – simple firmware updates to industry standard firmware ASTM/DSRC wants to move E2213 into IEEE –E2213 is difficult to read because it does not contain the complete text –Will be difficult to maintain with references IEEE and IEEE a.

doc.: IEEE /476r1 Submission July 2003 Tim Godfrey, Intersil; Broady Cash, ARINCSlide 5 DSRC specific IEEE Standards DSRC is a complete communication protocol –not just MAC and PHY IEEE standards are being developed for higher layers: –IEEE P1556 Draft Standard for Dedicated Short Range Communications (DSRC) Security –IEEE P Draft Standard for Dedicated Short Range Communications (DSRC) Resource Manager –IEEE P Draft Standard for Dedicated Short Range Communications (DSRC) Application Services and and Management Entity –IEEE P Draft Standard for Dedicated Short Range Communications (DSRC) IP interface (Network Service) –IEEE P Draft Standard for Dedicated Short Range Communications (DSRC) Medium Access Control (MAC) Extension and Management Entity (MXME)

doc.: IEEE /476r1 Submission July 2003 Tim Godfrey, Intersil; Broady Cash, ARINCSlide 6 Core DSRC Architecture LAYER 1 - DSRC PHY LAYER 2 - DSRC MAC APPLICATION SERVICE LAYERS APPLICATION MANAGER LAYER 2 - LLC MLME PLCP/ PLME MXME OTHER APPLICATIONs NETWORK SERVICE LAYER 3 SME UPPER LAYER MGMT LAYER 2 - DSRC MAC EXTENSION TRANSPORT SERVICE LAYERS 4 NETWORK MANAGER LAYER 3

doc.: IEEE /476r1 Submission July 2003 Tim Godfrey, Intersil; Broady Cash, ARINCSlide 7 Application – Application Manager – Application Service – Transport Service – Network Service – Logical Link Control – MAC Extension – Physical and Medium Access Control (MAC) - User selected IEEE IEEE IETF RFC 768/793 IEEE IEEE IEEE ASTM E Implements a useful process Provides commands and a memory structure that applications can use to store information on a DSRC radio Sends properly formatted data to establish communication links. Collects application registration information to build link establishment messages. UDP - Routes data to the correct application (port) TCP - adds an error and sequence checking service Routes data to the correct device on a network or across multiple networks Routes data to the correct communications stack on a device Routes data to the correct communications channel on a device Implements the physical transfer of data over the air while exercising the proper controls to minimize data collisions and detect errors when they occur. Station Management provides the management data access to all layers. Core DSRC Standards

doc.: IEEE /476r1 Submission July 2003 Tim Godfrey, Intersil; Broady Cash, ARINCSlide 8 Applications Safety –Intersection collision warning, stopped vehicle hazard warning, emergency vehicle approach warning, work zone warning, road hazard warning, etc. Information: “Roadside Kiosk” –Traffic advisory, road construction, weather conditions, upcoming exit services, map updates, etc. Internet Access Hot-Spots –Provided by service stations, truck stops, retail store parking lots, etc. Entertainment –Music & video download – Service providers and personal –Integration with home wireless LAN Fleet Management –Port of entry, asset tracking, security, scheduling Electronic Payment –Toll plazas, service stations, drive-through venues, truck stops, etc.

doc.: IEEE /476r1 Submission July 2003 Tim Godfrey, Intersil; Broady Cash, ARINCSlide 9 Frequency (GHz) US Spread Spectrum Allocation Ch 172 Ch 174Ch 176 Ch 180 Ch 184 Ch 182 Ch 178 US, Canadian, and Potential Mexican DSRC Allocation Control Channel Service Channels High Availability/Low Latency Optional 20 MHz Primarily Public Safety High-power App. “Reserved” for harmonization with potential extension of the UNII band 10 MHz Channels with 20 MHz combination options North American Band Plan

doc.: IEEE /476r1 Submission July 2003 Tim Godfrey, Intersil; Broady Cash, ARINCSlide 10 5 GHz Band International Plan Europe Japan N. America ISM band CALM M5 Unlicen. W-LAN Regionally available: ISM+ shared unlicenced Dedicated ITS (DSRC)

doc.: IEEE /476r1 Submission July 2003 Tim Godfrey, Intersil; Broady Cash, ARINCSlide 11 Other Related Organizations US Department of Transportation –Federal Highway Administration –National Highway Traffic Safety Administration ITS America AASHTO – American Association of State Highway And Transportation Officials

doc.: IEEE /476r1 Submission July 2003 Tim Godfrey, Intersil; Broady Cash, ARINCSlide 12 Uniqueness of DSRC Communication with vehicles at high velocities Capability to communicate with all units Capability to process individual broadcast messages Extremely low latency tolerance – measured in single and dual digit milliseconds Multiple channel operation during each session Extremely close channel spacing Widely varying unit power levels Multiple overlapping uncoordinated communication zones (usually on different channels) Operation in the automotive environment Licensed operation

doc.: IEEE /476r1 Submission July 2003 Tim Godfrey, Intersil; Broady Cash, ARINCSlide 13 Relationship to and How is this standard different when compared to or ? – and are carrier oriented. The connection and data service is what is sold. Typically operating in licensed bands. Targeting ranges of many kilometers. –DSRC is application and safety oriented. The selling of “service” (as a carrier) is prohibited by FCC rules. Short range (<1KM), dynamic, ad-hoc connections Very low latency communication Rapid initialization Provides direct vehicle to vehicle communications

doc.: IEEE /476r1 Submission July 2003 Tim Godfrey, Intersil; Broady Cash, ARINCSlide 14 Relationship to 4.9GHz J is addressing the 4.9GHz spectrum in Japan. –Some users have requested a 10MHz channelization option, which is proposed to be the same as DSRC –Leverage work already being done for Japanese requirement In the US, 4.9GHz is allocated for public safety. –The National Public Safety Telecommunications Council administrates this spectrum –They are considering proposals to coordinate with DSRC modulation and channelization.

doc.: IEEE /476r1 Submission July 2003 Tim Godfrey, Intersil; Broady Cash, ARINCSlide 15 What will happen in ? The ASTM DSRC committee is asking to form a Study Group –To develop an amendment to extend and modify the 5GHz PHY for the DSRC band, and incorporate necessary MAC changes. –MAC changes apply only to the use of this specific PHY in this band.

doc.: IEEE /476r1 Submission July 2003 Tim Godfrey, Intersil; Broady Cash, ARINCSlide 16 What changes to ? DSRC is based on the 11a and 11g OFDM PHY, with the following primary differences: –The frequency range is GHz –The channels are 10MHz wide, with two 20MHz options –The spectral mask has three additional configurations referenced to power output –Additional classes of operation were added to the adjacent channel rejection requirements. –An automotive environment temperature class is added –Specific channels have unique rules for operation Almost all units acquire the link on the “Control Channel” then switch to other channels for data transfer. –A modified IBSS mode is used for rapid link acquisition –For privacy reasons, the MAC address is random Using Locally Administered address space An algorithm to resolve duplicates is provided (a rare occurrence: 1 in 2^46 probability)

doc.: IEEE /476r1 Submission July 2003 Tim Godfrey, Intersil; Broady Cash, ARINCSlide 17 Possible Timeline July 2003 –Meet in WNG –Submit and approve WG motion form Study Group September 2003 –SG meets –Write PAR and 5 Criteria, approve in WG November 2003 –802 ExCom approves PAR and 5 Criteria –Begin work on first draft January 2004 –Issue first draft to Letter Ballot

doc.: IEEE /476r1 Submission July 2003 Tim Godfrey, Intersil; Broady Cash, ARINCSlide 18 Motion Request that an Study Group be formed to develop an amendment to extend and modify the GHz PHY to support DSRC technology in the 5.9GHz DSRC (Dedicated Short Range Communication) band, and incorporate necessary MAC changes. –Passed in WNG 40 for : 0 against : 31 abstain