ELECTRONIC KEY SYSTEM FOR VEHICLE

WIPO Patent Application WO/2016/157699

A1

This electronic key system for a vehicle is provided with an in-vehicle device (110) and a portable device (200) that is associated with the in-vehicle device and is carried by a user. The in-vehicle device is provided with an in-vehicle device-side transmission unit (113), a communication method changing unit, and an in-vehicle device-side reception unit (112). The portable device is provided with a communication method selection unit, an antenna (220) for a first frequency band, a reception processing unit, a portable device-side transmission unit, and a noise determination unit. When it is determined by the noise determination unit that there is noise, the communication method selection unit selects a communication method that is different from the communication method that is currently being used, and the portable device-side transmission unit transmits a method changing instruction signal to the in-vehicle device. When the in-vehicle device-side reception unit receives a method changing instruction signal, the communication method changing unit changes the communication method to a communication method designated by the method changing instruction signal.

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JP2009084917	REMOTE CONTROL ANTI-THEFT SYSTEM FOR VEHICLE

ISHIKAWA RYUSUKE (JP)
KOJIMA MASAHITO (JP)

PCT/JP2016/000911

October 06, 2016

February 22, 2016

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DENSO CORP (JP)

E05B49/00; H04W4/48; B60R25/24; H04B1/034; H04B1/3827; H04B7/00; H04W84/10

US6801134B1	2004-10-05
JP2009278452A	2009-11-26
JPH10336773A	1998-12-18

KIN, Junhi (JP)
Gold Junki (JP)

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