OCCUPANT APPROACH DETECTION APPARATUS, OCCUPANT APPROACH DETECTION SYSTEM, AND OCCUPANT APPROACH DETECTION METHOD

摘要

An occupant approach detection apparatus which includes: a transmitting device individually transmitting transmission request signals from transmitting antennas provided to doors of a vehicle; a receiving device receiving a response signal returned, as a response to one of the transmission request signals, from a portable unit; and a controller detecting an approach of a vehicle occupant carrying the portable unit based on the response signal. Each of the transmission request signals includes identification information for identifying corresponding one of the transmitting antennas or one of the doors. The response signal includes identification information corresponding to the identification information included in the transmission request signal. The controller determines which of the plurality of doors is approached by the vehicle occupant carrying the portable unit on the basis of the identification information included in the response signal.