Communications-based active safety applications use vehicle-to-vehicle (V2V) and vehicle-to-infrastructure (V2I) short-range wireless communications to detect potential hazards in a vehicle’s path – even those the driver does not see. The connected vehicle provides enhanced awareness at potentially reduced cost, and offers additional functionality over autonomous sensor systems available on some vehicles today. Communications-based sensor systems could potentially be a low-cost means of enabling hazard detection capability on all vehicle classes, but requires vehicles and infrastructure to be outfitted with interoperable communications capabilities.
Dedicated Short Range Communications (DSRC) are the communications media of choice for communications-based active safety systems research because:
It operates in a licensed frequency band.
It is primarily allocated for vehicle safety applications by FCC Report & Order – Feb. 2004 (75 MHz of spectrum).
It provides a secure wireless interface required by active safety applications.
It supports high speed, low latency, short-range wireless communications.
It works in high vehicle speed mobility conditions.
Its performance is immune to extreme weather conditions (e.g. rain, fog, snow, etc.).
It is designed to be tolerant to multi-path transmissions typical with roadway environments.
It supports both vehicle-to-vehicle and vehicle-to-infrastructure communications.
- See more at: http://www.its.dot.gov/DSRC/dsrc_faq.htm#sthash.Uh24Trrf.dpuf
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