| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a smart system configured so that an in-vehicle system wirelessly transmits a request signal of LF band, a mobile unit having received it wirelessly transmits an answer signal of RF band, and the in-vehicle system having received it performs smart drive, while determining a relay station attack in a novel method. <P>SOLUTION: The in-vehicle system 10 wirelessly transmits a first carrier signal of LF band from a carrier oscillator 6. The mobile unit 20 receives the first carrier signal, and wirelessly transmits a carrier modulated signal obtained by modulating the first carrier signal by use of a second carrier signal of RF band. The in-vehicle system 10 acquires the first carrier signal from the carrier oscillator 6 as a local carrier signal, receives the carrier modulated signal, permits smart drive when a frequency of the acquired local carrier signal matches a frequency of the first carrier signal included in the received carrier modulated signal, or does not permit the smart drive when they do not match each other. <P>COPYRIGHT: (C)2013,JPO&INPIT</p> |
