Dedicated short-range communications
Dedicated short-range communications are one-way or two-way short- to medium-range wireless communication channels specifically designed for automotive use[1] and a corresponding set of protocols and standards.[2] In October 1999, the United States Federal Communications Commission (FCC) allocated in the USA 75MHz of spectrum in the 5.9GHz band for DSRC to be used by Intelligent Transportation Systems ITS.[3] Also, in Europe in August 2008 the European Telecommunications Standards Institute (ETSI) has allocated 30 MHz of spectrum in the 5.9GHz band for ITS.[4]
Currently its main use in Europe and Japan is in electronic toll collection.[5] DSRC systems in Europe, Japan and U.S. are not, at present, compatible.
Other possible applications are:
- Emergency warning system for vehicles
- Cooperative Adaptive Cruise Control
- Cooperative Forward Collision Warning
- Intersection collision avoidance
- Approaching emergency vehicle warning (Blue Waves)
- Vehicle safety inspection
- Transit or emergency vehicle signal priority
- Electronic parking payments
- Commercial vehicle clearance and safety inspections
- In-vehicle signing
- Rollover warning
- Probe data collection
- Highway-rail intersection warning
- Electronic toll collection
Other short range wireless protocols are IEEE 802.11, Bluetooth and CALM.
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[edit] Standardization
In the European standardization organisation CEN, sometimes in co-operation with the International Organization for Standardization (ISO) the following DSRC standards have been developed:
- EN 12253:2004 Dedicated Short-Range Communication – Physical layer using microwave at 5.8 GHz (review)
- EN 12795:2002 Dedicated Short-Range Communication (DSRC) – DSRC Data link layer: Medium Access and Logical Link Control (review)
- EN 12834:2002 Dedicated Short-Range Communication – Application layer (review)
- EN 13372:2004 Dedicated Short-Range Communication (DSRC) – DSRC profiles for RTTT applications (review)
- EN ISO 14906:2004 Electronic Fee Collection – Application interface
Each standard addresses different layers in the OSI model communication stack.
[edit] See also
[edit] References
- ^ Harvey J. Miller and Shih-Lung Shaw (2001). Geographic Information Systems for Transportation. Oxford University Press. ISBN 0195123948. http://books.google.com/books?id=2XjtJIUG-gMC&pg=RA1-PA311&dq=%22Dedicated+Short+Range+Communications%22&as_brr=3&ei=XdPsSKXrHIGgsgOp6-nLBg&sig=ACfU3U3QIpLfxrC6-VjFrsHom4fKVsrf8Q.
- ^ "What is DSRC?". leearmstrong.com. http://www.leearmstrong.com/DSRC/DSRCHomeset.htm. Retrieved 2008-02-17.
- ^ "Federal Communications Commission. News Release, October 1999". FCC. http://www.fcc.gov/Bureaus/Engineering_Technology/News_Releases/1999/nret9006.html. Retrieved 2009-08-16.
- ^ "European Telecommunications Standards Institute. News Release, September 2008". ETSI. http://www.etsi.org/WebSite/NewsandEvents/2008_09_Harmonizedstandards_ITS.aspx. Retrieved 2009-08-16.
- ^ "DSRC Standards: What's New?". standards.its.dot.gov. http://www.standards.its.dot.gov/Documents/advisories/dsrc_advisory.htm. Retrieved 2008-02-17.
[edit] External links
- Performance Evaluation of Short-Range Communication Links for Road Transport & Traffic Telematics (German)
- A comparison of different technologies for EFC and other ITS applications
- Validation of Dedicated Short-Range Communications
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