UNAUTHORIZED COMMUNICATION ESTABLISHMENT PREVENTING SYSTEM

WIPO Patent Application WO/2018/123692

A1

This unauthorized communication establishment preventing system determines whether radio communications performed using radio waves having the same frequency band between a verification ECU and an electronic key are valid or unauthorized. The unauthorized communication establishment preventing system is provided with: a dividing unit which divides a transmission radio wave (Sa) and/or a reply radio wave (Sb) into a plurality of divided signals (Sc1 to Sc3; Si1 to Si3; Sr1 to Sr3); a first transmitting unit which transmits each divided signal as a signal strength measurement signal; a second transmitting unit which transmits a measurement response signal (Sk) with respect to each signal strength measurement signal; a first measuring unit which measures a first signal strength, which is the received signal strength of the signal strength measurement signal; a second measuring unit which measures a second signal strength, which is the received signal strength of the measurement response signal; and a validity determining unit which determines whether a radio communication is valid or unauthorized on the basis of the first signal strength and the second signal strength.

OYA YOSHIYUKI (JP)
MORI SATOSHI (JP)
IWASHITA HIROAKI (JP)
NAIKI KAZUKI (JP)

PCT/JP2017/045330

July 05, 2018

December 18, 2017

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TOKAI RIKA CO LTD (JP)

H04Q9/00; B60R25/24; E05B49/00; G06F21/44; H04L9/32

WO2015107984A1

2015-07-23

JP2012060482A	2012-03-22
JP2015131608A	2015-07-23
JP2011052506A	2011-03-17
JP2011229061A	2011-11-10

ONDA, Makoto et al. (JP)

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