Patent ID: 11963011
Assignee: MARELLI CORPORATION
Field: Control (Instruments)
Classification: CPC G  H  B | IPC H

Claim 6:
7. The relay attack determination device according to claim 4, wherein
the comparator, as the comparative process, calculates a difference between respective average values of the reception strength of the first signal and the second signal and compares the difference with a predetermined numerical range,
the determiner determines the relay attack in a case where the difference deviates from the predetermined numerical range,
a lower limit of the predetermined numerical range is determined based upon a difference in output strength between the first signal and the second signal upon transmitting the first signal and the second signal in the transmitter, and
an upper limit of the predetermined numerical range is determined based upon a difference between the reception strength of the first signal and an upper limit or a lower limit of a usable range of the measurement value in the strength meter.