| 摘要 |
PROBLEM TO BE SOLVED: To enable a position of a vehicle to be confirmed when a position of a terminal device and the position of the vehicle are brought relatively away from each other.SOLUTION: An on-vehicle device includes a detection part that determines the presence or absence of detection of a response from a terminal device 20 by transmitting a signal by a short-range radio communication system, and a message part that transmits positional information, indicating a position of the on-vehicle device 10, to the terminal device or a different device 30, when it is determined that the response from the terminal device is not detected.SELECTED DRAWING: Figure 1 |
