In an on-board communication system, an on-board device transmits detection signals from a plurality of antennas provided in a vehicle, and a plurality of portable devices transmits response signals corresponding to the received detection signals. The on-board device performs position detection of the portable devices by receiving the response signals transmitted from the portable devices. Prior to transmission of the detection signals, the antennas transmit a processing start signal. The processing start signal and the detection signals are signals received in common by the plurality of portable devices. Each portable device includes a portable reception unit that receives the detection signals, and a portable transmission unit that, when the portable reception unit has received the detection signals, transmits the response signals, which include information corresponding to the received detection signals.
ON-BOARD COMMUNICATION SYSTEM, AND ON-BOARD DEVICE
2017-05-04
Patent
Electronic Resource
English
ON-BOARD COMMUNICATION SYSTEM, ON-BOARD RELAY DEVICE, AND ON-BOARD CONTROL DEVICE
European Patent Office | 2020
|ON-BOARD COMMUNICATION SYSTEM, ON-BOARD DEVICE, AND INTERFACE DEVICE
European Patent Office | 2022
|