ROAD-VEHICLE COMMUNICATION SYSTEM, LANE NUMBER RECOGNITION METHOD FOR ROAD-VEHICLE COMMUNICATION SYSTEM, AND ON-VEHICLE UNIT USED FOR THE SAME

摘要

PROBLEM TO BE SOLVED: To provide a road-vehicle communication system, a lane number recognition method for the road-vehicle communication system, and an on-vehicle unit used for the same, recognizing a lane on which a vehicle travels, with high accuracy.;SOLUTION: This road-vehicle communication system comprises the on-vehicle unit 2 of the vehicle C traveling on a road R, and an optical beacon 4 having a plurality of projector/receivers 8 arranged corresponding to the different lanes on the road. The on-vehicle unit comprises a determining part 26a determining whether a vehicle ID in lane notification information included in received second down-link information 36 is associated with one lane number, and a control part 26b continuously transmits up-link information 35 when the determining part 26a determines that the vehicle ID is not associated with the one lane number.;COPYRIGHT: (C)2008,JPO&INPIT