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Patent Searching and Data


Title:
PORTABLE DEVICE, VEHICULAR ON-BOARD DEVICE, AND REMOTE KEYLESS ENTRY SYSTEM
Document Type and Number:
WIPO Patent Application WO/2019/193866
Kind Code:
A1
Abstract:
A portable device according to one embodiment comprises: a portable device receiver that comprises a triaxial antenna and that receives, from an vehicular on-board device, a request signal containing a measurement signal; a portable device transmitter that transmits an answer signal to the vehicular on-board device; and a portable device control unit that controls the portable device receiver and the portable device transmitter. The portable device control unit comprises a received signal strength calculation unit that calculates the received signal strength of the measurement signal in each axis, and a relay attack determination unit that determines whether a relay attack has occurred on the basis of the ratios of the received signal strength for the measurement signal in each axis.

Inventors:
MIYAZAWA, Akira (1-7, Yukigaya-otsukamachi, Ota-k, Tokyo 01, 〒1458501, JP)
Application Number:
JP2019/007072
Publication Date:
October 10, 2019
Filing Date:
February 25, 2019
Export Citation:
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Assignee:
ALPS ALPINE CO., LTD. (1-7 Yukigaya-otsukamachi, Ota-ku Tokyo, 01, 〒1458501, JP)
International Classes:
E05B49/00; B60R25/24; H04Q9/00
Foreign References:
JP2006342545A2006-12-21
JP2015214316A2015-12-03
Attorney, Agent or Firm:
ITOH, Tadashige et al. (16th Floor, Marunouchi MY PLAZA 1-1, Marunouchi 2-chome, Chiyoda-k, Tokyo 05, 〒1000005, JP)
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