• US 20080186132A1
  • Filed: 01/03/2008
  • Published: 08/07/2008
  • Est. Priority Date: 02/06/2007
  • Status: Abandoned Application
First Claim
Patent Images

1. An electronic key system for a control object comprising:

  • an in-object unit provided in the control object; and

    a mobile unit for communicating with the in-object unit by radio signals and causing the in-object unit to perform predetermined control in the control object, wherein the mobile unit transmits a response to the in-object unit when receiving a request of response from the in-vehicle unit, characterized in thatthe in-object unit is configured to;

    select one channel from a plurality of predetermined channels of communication for receiving the response from the mobile unit, and transmit information of the selected channel when transmitting the request of response to the mobile unit so that the mobile unit transmits the response by way of the selected channel;

    select another channel from the plurality of predetermined channels automatically when failing to receive the response transmitted from the mobile unit in response to the request of response, and transmit another request of response and information of the selected another channel so that the mobile unit transmits another response by using the selected another channel; and

    select the another channel for next radio communications with the mobile unit automatically after receiving the another response from the mobile unit successfully by using the selected another channel.

View all claims

    Thank you for your feedback