Title:
KEYLESS ENTRY DEVICE
Document Type and Number:
WIPO Patent Application WO/2016/063717
Kind Code:
A1
Abstract:
[Problem] To provide a keyless entry device that has excellent communication speed and that can prevent a relay attack with a simple configuration. [Solution] A vehicle-side device 10 has a vehicle-side transmitter 11 that transmits a request signal, a vehicle-side receiver 12 that receives an answer signal, a vehicle-side control unit 15, and a vehicle-side electronic oscillator 16. A mobile unit 20 has a mobile unit-side receiver 22 that receives the request signal, a mobile unit-side transmitter that transmits the answer signal, and a mobile unit-side control unit 25. The vehicle-side electronic oscillator 16 can vary the carrier frequency of a carrier signal, and the request signal contains a plurality of frames each having a different carrier frequency. The mobile unit-side control unit 15 measures the reception strength of each frame and causes the mobile unit-side transmitter 21 to transmit the answer signal containing information based on the measured reception strength. The vehicle-side control unit 25 determines whether to perform the prescribed control with respect to the vehicle on the basis of the answer signal.
Inventors:
MIYAZAWA AKIRA (JP)
Application Number:
PCT/JP2015/078286
Publication Date:
April 28, 2016
Filing Date:
October 06, 2015
Export Citation:
Assignee:
ALPS ELECTRIC CO LTD (JP)
International Classes:
E05B49/00; B60R25/24; H04B1/3827; H04B1/50
Foreign References:
| JP2012123527A | 2012-06-28 | |||
| JP5218916B2 | 2013-06-26 | |||
| JP2008240315A | 2008-10-09 | |||
| JP2014180900A | 2014-09-29 | |||
| JP2010011393A | 2010-01-14 |
Attorney, Agent or Firm:
NOZAKI, Teruo (JP)
Teruo Nozaki (JP)
Teruo Nozaki (JP)
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