DSRC or Dedicated Short Range Communications is a short to medium range wireless protocol specifically designed for automotive use. It offers communication between the vehicle and roadside equipment. It is a sub-set of the RFID-technology. This technology for ITS applications is working in the 5.9GHz band (U.S.) or 5.8GHz band (Japan, Europe). Former standard used the 915 MHz band. Wireless is an old-fashioned term for a radio receiver, referring to its use as a wireless telegraph. ... An EPC RFID tag used for Wal-Mart An RFID tag used for electronic toll collection Radio Frequency IDentification (RFID) is an automatic identification method, relying on storing and remotely retrieving data using devices called RFID tags or transponders. ... The Intelligent Transportation System (ITS) program is an initiative of the United States Department of Transportation to add information technology to transport infrastructure and vehicles. ...

Currently its main use In Europe and Japan is in Electronic toll collection. DSRC systems in Europe, Japan and U.S. are not compatible. Many ETC systems use transponders like this one to electronically debit the accounts of registered cars without their stopping Transporder used in some Chilean freeways Electronic toll collection (ETC), an adaptation of aircraft identification friend or foe technology, aims to eliminate the delay on toll roads. ...

Other possible applications are:

• 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

Other short range wireless protocols are IEEE 802.11, Bluetooth and CALM. IEEE 802. ... This article is about the Bluetooth wireless specification. ...

Standardization

In the European standardization organisation CEN, sometimes in co-operation with the international standardization organisation ISO the following DSRC standards have been developed: CEN, the European Committee for Standardization, was founded in 1961 by the national standard bodies in the European Economic Community and EFTA countries. ... ISO has many meanings: Iso is the stem of the Latin transliteration of the Greek word ίσος (ísos, meaning equal). The iso- prefix in English derives from this and means equality or similarity. ...

• 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. The Open Systems Interconnection Reference Model (OSI Model or OSI Reference Model for short) is a layered abstract description for communications and computer network protocol design, developed as part of the Open Systems Interconnect initiative. ...

External links

• http://grouper.ieee.org/groups/scc32/DSRC/index.html
• http://www.leearmstrong.com/DSRC/DSRCHomeset.htm
• http://www.standards.its.dot.gov/Documents/dsrc_advisory.htm
• Performance Evaluation of Short-Range Communication Links for Road Transport & Traffic Telematics
• Standards Mandate 270 from the European Commission
• A comparison of different technologies for EFC and other ITS applications
• DSRC based Collision Prevention and Flow Optimization
• Strategic Plan for Transportation Technology.