| 摘要 |
A radio communication system, in which radio communication is carried out between an in-vehicle communication device (10), mounted in a vehicle (100), and a radio communication terminal (11) to detect a relative distance therebetween, includes an output control unit (15) that controls a radio wave intensity of a measuring signal, which is sent from one of the in-vehicle communication device and the radio communication terminal, at a pre-set predetermined value; and a measuring unit (14) that performs distance measuring on a vehicle side based on the radio wave intensity of the measuring signal controlled at the predetermined value or on a signal to which a value of the radio wave intensity of the measuring signal is added as information. |
