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
20.03.2018
Patent
Elektronische Ressource
Englisch
ON-BOARD COMMUNICATION SYSTEM, ON-BOARD RELAY DEVICE, AND ON-BOARD CONTROL DEVICE
Europäisches Patentamt | 2020
|ON-BOARD COMMUNICATION SYSTEM, ON-BOARD DEVICE, AND INTERFACE DEVICE
Europäisches Patentamt | 2022
|