Dedicated Short Range Communications

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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 5.9 GHz band (U.S.) or 5.8 GHz band (Japan, Europe). Former standard used the 915 MHz band.

Currently its main use In Europe and Japan is in Electronic toll collection. DSRC systems in Europe, Japan and U.S. are not compatible.

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.

Standardization

In the European standardization organisation CEN, sometimes in co-operation with the international standardization organisation 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.

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
http://path.berkeley.edu/dsrc/
[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].
[Validation of Dedicated Short-Range Communications]

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