Title:
VEHICLE COMMUNICATION SYSTEM AND PORTABLE DEVICE
Document Type and Number:
WIPO Patent Application WO/2017/138336
Kind Code:
A1
Abstract:
A vehicle communication system is provided with an onboard device (1) for transmitting a detection signal from an LF transmission antenna (2) provided to a vehicle (C), and a portable device (3) for receiving the detection signal and transmitting a response signal corresponding to the received detection signal. The onboard device (1) detects the position of the portable device (3) by receiving the response signal transmitted from the portable device (3). The portable device (3) is provided with a measurement unit for measuring the reception signal intensity of the received detection signal, a quantizing unit for quantizing the reception signal intensity at a different resolution corresponding to a reception signal intensity obtained by measurement, and a transmission unit for transmitting a response signal including quantized reception signal intensity data.
Inventors:
MATSUOKA KENJI (JP)
Application Number:
PCT/JP2017/002069
Publication Date:
August 17, 2017
Filing Date:
January 23, 2017
Export Citation:
Assignee:
AUTONETWORKS TECHNOLOGIES LTD (JP)
SUMITOMO WIRING SYSTEMS (JP)
SUMITOMO ELECTRIC INDUSTRIES (JP)
SUMITOMO WIRING SYSTEMS (JP)
SUMITOMO ELECTRIC INDUSTRIES (JP)
International Classes:
G01S11/06; B60R25/24; E05B49/00; H04Q9/00
Foreign References:
| JP2007278731A | 2007-10-25 | |||
| JP2005522085A | 2005-07-21 | |||
| JP2005181147A | 2005-07-07 | |||
| JPH03251781A | 1991-11-11 |
Attorney, Agent or Firm:
KOHNO, Hideto et al. (JP)
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