VEHICLE-USE COMMUNICATION SYSTEM, IN-VEHICLE DEVICE, PORTABLE DEVICE, AND A NON-TRANSITORY COMPUTER-READABLE RECORDING MEDIUM
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United States of America Patent
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app pub date -
Jun 24, 2015
filing date -
Jul 14, 2014
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A vehicle-use communication system configured to detect the position of a portable device. The system includes an in-vehicle device transmitting a signal from a plurality of antennas in the vehicle when any one of a plurality of operation parts on an outer face of a vehicle is operated. A portable device receives the transmitted signal and measures the signal strength of the received signal, and transmits a response signal containing the signal strength. The in-vehicle device stores information concerning each of a plurality of areas of the vehicle cabin. The in-vehicle device identifies the operated operation part and selects information concerning one area, in which the operation part has been identified, from the information concerning the plurality of areas. On the basis of the received signal strengths and the information concerning the selected one area, the in-vehicle device determines whether the portable device is located within the area.
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