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Dedicated short-range communications are one-way or two-way short-range to medium-range wireless 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 (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) 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 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 scheme uses DSRC technology for road use measurement. 〔 〕 Other possible applications were: * 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. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Dedicated short-range communications」の詳細全文を読む スポンサード リンク
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