| 摘要 |
PROBLEM TO BE SOLVED: To enable controlling navigation operation of one vehicle from the other vehicle, among a plurality of vehicles, by transmitting contol codes with a radio apparatus which codes control the navigation operation of the one vehicle from the other vehicle. SOLUTION: A radio part 3 has a radio apparatus unit 31, a modulation/ demodulation circuit 32 and a radio antenna 33, and sends out position information and course information as a radio signal. At the time of receiving, received data are sent out to a navigation unit 12, via the radio part 3 and a GPS data communication modem part 2. When a vehicle during group traveling transmits a message like a rest proposal, beep sound is generated from an aural generating unit 17, in order to give an alarm to a driver of the other vehicle. Control codes are added to the navigation code and transmitted. The control codes are added to the top of the message, control data processing and display, and contain the control of the aural generating unit 17 and the designation of display form in a displaying part 14. |
