KEYLESS ENTRY DEVICE - ALPS ELECTRIC CO LTD

Title:

KEYLESS ENTRY DEVICE

Document Type and Number:

WIPO Patent Application WO/2016/031524

Kind Code:

A1

Abstract:

[Problem] To provide a keyless entry device that can easily distinguish between a request signal from an unauthorized relay device and a legitimate request signal transmitted from an in-vehicle device. [Solution] An in-vehicle device is provided with an in-vehicle controller for controlling transmission of request signal, and carrying out a prescribed control in response to authentication based on an answer signal. A mobile device is provided with a mobile device controller for detecting reception strength information for a request signal transmitted by the in-vehicle device, and transmitting an answer signal that is based on the reception strength. The in-vehicle controller controls an in-vehicle transmitter so as to transmit request signals that include determination signals that differ in strength level for each of a number of zones, and the in-vehicle controller or mobile device controller determines, on the basis of fluctuations of the reception strength of determination signals within each zone as received by the mobile device, whether a request signal is a legitimate signal.

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Inventors:

MIYAZAWA AKIRA (JP)

Application Number:

PCT/JP2015/072460

Publication Date:

March 03, 2016

Filing Date:

August 07, 2015

Export Citation:

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Assignee:

ALPS ELECTRIC CO LTD (JP)

International Classes:

E05B49/00; B60R25/24; H04B1/38; H04B1/59; H04Q9/00

Foreign References:

JP2010185186A	2010-08-26
JP2011109589A	2011-06-02

Other References: