ROAD-VEHICLE COMMUNICATION SYSTEM BY NARROW-BAND RADIO COMMUNICATION SYSTEM

摘要

PROBLEM TO BE SOLVED: To provide a frequency selecting and direction detection method for on-vehicle device by a communication method for performing a drive support system by DSRC.;SOLUTION: This road-vehicle communication system for performing a communication with a traveling vehicle comprises an advance base station 1 having the function of transmitting broadcast data provided from a road-side processor 3 and adding frequency information and base station number information with which an on-vehicle terminal selects the next base station to the head of the broadcast data, the advance base station performing a report at a preferential frequency of narrow-band radio communication; the next base station 3 having the function of adding base station number information with which the on- vehicle terminal performs a wrong detection with the information of the advance base station to the head of the broadcast data, the next base station performing communication at the frequency reported in the advance base station to provide information; and the on-vehicle terminal 4 having a frequency selecting function and a next base station information waiting function.;COPYRIGHT: (C)2004,JPO