Dedicated short-range communications (DSRC) 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 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] The decision to use the spectrum in the 5GHz range is due to its spectral environment and propagation characteristics, which are suited for vehicular environments - waves propagating in this spectrum can offer high data rate communications for long distances (up to 1000 meters) with low weather dependence.
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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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.
See also
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.
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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