Dedicated short-range communications (DSRC) are one-way or two-way short-range to medium-range

wireless Wireless communication (or just wireless, when the context allows) is the transfer of information between two or more points without the use of an electrical conductor, optical fiber or other continuous guided medium for the transfer. The most ...

communication channels specifically designed for automotive use and a corresponding set of protocols and standards.

History

In October 1999, the United States

Federal Communications Commission The Federal Communications Commission (FCC) is an independent agency of the United States federal government that regulates communications by radio, television, wire, satellite, and cable across the United States. The FCC maintains jurisdicti ...

(FCC) allocated 75 MHz of spectrum in the 5.9 GHz band to be used by intelligent transportation systems (ITS). In August 2008, the European Telecommunications Standards Institute (

ETSI The European Telecommunications Standards Institute (ETSI) is an independent, not-for-profit, standardization organization in the field of information and communications. ETSI supports the development and testing of global technical standard ...

) allocated 30 MHz of spectrum in the 5.9 GHz band for ITS. By 2003, it was used in Europe and Japan in electronic toll collection. DSRC systems in Europe, Japan and the U.S. are not compatible and include some very significant variations (5.8 GHz, 5.9 GHz or even infrared, different baud rates, and different protocols). Singapore's

Electronic Road Pricing The Electronic Road Pricing (ERP) system is an electronic toll collection scheme adopted in Singapore to manage traffic by way of road pricing, and as a usage-based taxation mechanism to complement the purchase-based Certificate of Entitlem ...

scheme plans to use DSRC technology for road use measurement (ERP2) to replace its ERP1 overhead gantry method. In June 2017, the Utah Department of Transportation successfully demonstrated a Transit DSRC system on SR-68 (Redwood Road) for eleven miles, from 400 South in Salt Lake City to 8020 South in West Jordan City. This was in partnership with the Utah Transit Authority. Several UTA Transit buses were outfitted with the DSRC equipment to allow for signal cycle time extensions if the bus was running behind schedule. In November 2020, the FCC reallocated all of DSRC's spectrum for other uses citing lack of adoption. Allocating 45 MHz to the neighboring 5.8 GHz

ISM band The ISM radio bands are portions of the radio spectrum reserved internationally for industrial, scientific and medical (ISM) purposes, excluding applications in telecommunications. Examples of applications for the use of radio frequency (RF) ener ...

and the remaining 30 Mhz to use by

Cellular V2X Vehicular-to-Everything (V2X) communication is important in enabling safe, dependable, and efficient transportation services, which can be implied in both the near- and long-term and can meet the requirements of today and tomorrow. Cellular V2X (C- ...

. Other possible applications were: * Emergency warning system for vehicles *

Cooperative Adaptive Cruise Control The Cooperative Adaptive Cruise Control (CACC) is an extension to the adaptive cruise control (ACC) concept using Vehicle-to-Everything (V2X) communication. CACC realises longitudinal automated vehicle control. In addition to the feedback loop used ...

* 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 Bluetooth is a short-range wireless technology standard that is used for exchanging data between fixed and mobile devices over short distances and building personal area networks (PANs). In the most widely used mode, transmission power is limi ...

and CALM.

Standardization

The European standardization organisation

European Committee for Standardization The European Committee for Standardization (CEN, french: Comité Européen de Normalisation) is a public standards organization whose mission is to foster the economy of the European Single Market and the wider European continent in global t ...

(CEN), sometimes in co-operation with the

International Organization for Standardization The International Organization for Standardization (ISO ) is an international standard development organization composed of representatives from the national standards organizations of member countries. Membership requirements are given in A ...

(ISO) developed some DSRC standards: * EN 12253:2004 Dedicated Short-Range CommunicationPhysical 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 CommunicationApplication layer (review) * EN 13372:2004 Dedicated Short-Range Communication (DSRC)DSRC profiles for RTTT applications (review) * EN ISO 14906:2004 Electronic Fee CollectionApplication interface Each standard addresses different layers in the

OSI model The Open Systems Interconnection model (OSI model) is a conceptual model that 'provides a common basis for the coordination of SOstandards development for the purpose of systems interconnection'. In the OSI reference model, the communications ...

communication stack.

References

External links

Performance Evaluation of Short-Range Communication Links for Road Transport & Traffic Telematics
{{in lang, de

History

Standardization

See also

References

External links