| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a radio control system for a vehicle which prevents a transmission method of transmission data from being easily deciphered even when the transmission data are intercepted repeatedly. <P>SOLUTION: The radio control system 1 for the vehicle comprises a control part 3b, a transmission pre-processing means 3c and a transmission high frequency part 3d on the side of a key 3. The control part 3b designates the change of transmission method of the transmission data D for every operation of a button 3a (i.e., for every transmission of the transmission data D), and outputs the transmission data D including identification information d3 identifying the method of transmission designated to be changed and button data d4 corresponding to the content of operation of the button 3a. The transmission pre-processing means 3c conducts transmission pre-processing of the transmission data D from the control part 3b based on the transmission method designated to be changed by the control part 3b. The transmission high frequency part 3d radio-transmits the transmission data D, which are pre-processed by the transmission pre-processing means 3c, to an in-vehicle unit 7. <P>COPYRIGHT: (C)2006,JPO&NCIPI</p> |
