A remote keyless entry (RKE) system according to one embodiment is provided with: a vehicle-mounted instrument provided with a vehicle-mounted instrument control unit, a vehicle-mounted instrument transmission unit for transmitting a vehicle-mounted instrument signal, and a vehicle-mounted instrument reception unit for receiving a mobile device signal; and a mobile device provided with a mobile device control unit, an acceleration sensor, a mobile device reception unit for receiving a vehicle-mounted instrument signal, and a mobile device transmission unit for transmitting a mobile device signal. The mobile device control unit calculates, on the basis of the vehicle-mounted instrument signal, a distance from the vehicle-mounted instrument to the mobile device and, on the basis of an acceleration measured by the acceleration sensor, calculates a first movement distance of the mobile device and causes the mobile device transmission unit to transmit a mobile device signal including at least the distance. The vehicle-mounted instrument control unit calculates, on the basis of the distance included in the mobile device signal, a second movement distance of the mobile device and, on thebasis of the first movement distance and the second movement distance, determines whether a relay attack has been carried out.
提供一种能够高精度检测中继攻击的遥控无钥匙进入系统。一个实施方式涉及的RKE系统具备:车载机,具备车载机控制部、发送车载机信号的车载机发送部以及接收便携机信号的车载机接收部;以及便携机,具备便携机控制部、加速度传感器、接收车载机信号的便携机接收部以及发送便携机信号的便携机发送部。便携机控制部基于车载机信号来计算从车载机到便携机的距离,并基于加速度传感器计测到的加速度来计算便携机的第一移动距离,使便携机发送部发送至少包括距离的便携机信号,车载机控制部基于便携机信号所包含的距离来计算便携机的第二移动距离,基于第一移动距离和第二移动距离来判断是否被进行了中继攻击。
REMOTE KEYLESS ENTRY SYSTEM
遥控无钥匙进入系统
2020-06-19
Patent
Elektronische Ressource
Chinesisch
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