Title:
車両用通信システム、車載機、携帯機及びコンピュータプログラム
Document Type and Number:
Japanese Patent JP6398425
Kind Code:
B2
Abstract:
A vehicle-use communication system includes an in-vehicle device and a portable device. The in-vehicle device transmits a signal from a plurality of transmitting antennas provided in a vehicle. The portable device measures the received signal strength of the signal transmitted from each of the plurality of transmitting antennas and transmits a response signal containing the received signal strength of each signal. The in-vehicle device receives the response signal and stores: small space information concerning a small space of a vehicle cabin; and large space information concerning being the entirety of the vehicle cabin. The in-vehicle device selects the small space information or the large space information in accordance with the situation, and determines whether the portable device is within the vehicle cabin on the basis of the selection of small space information or the large space information and the received signal strengths contained in the response signals.
Inventors:
Yoshihiro Hamada
Asami Takumi
Takuya Furuta
Hiroyuki Kurata
Asami Takumi
Takuya Furuta
Hiroyuki Kurata
Application Number:
JP2014152098A
Publication Date:
October 03, 2018
Filing Date:
July 25, 2014
Export Citation:
Assignee:
Auto Network Technologies, Ltd.
SUMITOMO WIRING SYSTEMS,LTD.
Sumitomo Electric Industries, Ltd.
SUMITOMO WIRING SYSTEMS,LTD.
Sumitomo Electric Industries, Ltd.
International Classes:
H04W4/40; B60R25/24; E05B49/00; H04W64/00
Domestic Patent References:
| JP4529762B2 | ||||
| JP5437959B2 | ||||
| JP2012122222A | ||||
| JP201060457A |
Attorney, Agent or Firm:
Hideno Kono
Nobuo Kono
Nobuo Kono
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