Title:
CONTROL SYSTEM
Document Type and Number:
WIPO Patent Application WO/2015/107609
Kind Code:
A1
Abstract:
A control system is provided with a vehicle-mounted device (10) and a portable device (20) possessed by a user. The vehicle-mounted device is provided with an RF signal transmission unit (S104 to S108) that transmits, after transmitting an LF signal, an RF signal synchronized with an RF clock at a first transmission timing defined by the RF clock. The portable device is provided with an RF transmission/reception unit (21), a transmission timing determination unit (S206, S210, S212) that counts the timing of reception of the RF signal and that determines second transmission timing for a response signal on the basis of the reception timing, and a response signal transmission unit (S214) that transmits the response signal at the second transmission timing. The vehicle-mounted device is provided with a determination unit (S114) that determines whether the interval of time between transmission of the LF signal or RF signal and reception of the response signal is within a proper range defined on the basis of the RF clock, and a permission unit (S118) that permits a predetermined operation with respect to a vehicle if the time interval is within the proper range.
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Inventors:
TOKUNAGA YUUKI (JP)
MORI YUUJI (JP)
MORI YUUJI (JP)
Application Number:
PCT/JP2014/006478
Publication Date:
July 23, 2015
Filing Date:
December 26, 2014
Export Citation:
Assignee:
DENSO CORP (JP)
International Classes:
B60R25/24; E05B49/00; H04Q9/00
Foreign References:
| JP2003013644A | 2003-01-15 | |||
| JP2012056343A | 2012-03-22 | |||
| JP2012081783A | 2012-04-26 | |||
| JP2011019120A | 2011-01-27 | |||
| JP2011052506A | 2011-03-17 |
Attorney, Agent or Firm:
KIN, Junhi (JP)
Gold Junki (JP)
Gold Junki (JP)
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