Vehicle remote control key system and signal processing method

摘要

A vehicle remote control key system and a method of processing a signal in the system are provided. The system includes a remote control key that is configured to send out a radio frequency (RF) signal that includes an identification (ID) and operation information to remotely control a target vehicle based on a remote control key operation. In addition, a controller is configured to determine whether the ID of the received RF signal is available and perform the remote control when the ID is available and the controller retransmits the RF signal to a vehicle in the vicinity of the target vehicle when the ID is unavailable and increases a count bit, which stores the number or times of retransmission in a frame, by one when retransmitting the RF signal.

主权项

1. A vehicle remote control key system, comprising:
a radio frequency (RF) receiver receiving an RF signal which is sent out from a remote control key or retransmitted from another vehicle, the RF signal includes an identification (ID) and operation information to remotely control a target vehicle based on a remote control key operation; a transmitter retransmitting the RF signal; and a controller having a memory and a processor and configured to:
determine whether the ID of the RF signal received by the RF receiver is available;perform the remote control when the ID is available;control the transmitter to retransmit the RF signal to a vehicle in the vicinity when the ID is unavailable under a first condition;increase a count bit, which represents the number or times of retransmissions and is stored in a frame of the RF signal, by one when retransmitting the RF signal; andstore the ID and the increased count bit of the RF signal on a retransmission list of the memory when retransmitting the RF signal; wherein the controller analyzes the frame of the RF signal to determine whether the ID of the RF signal received by the RF receiver is available, wherein the controller switches from a sleep mode into a wake-up mode, detects an operation instruction in the RF signal, and executes the corresponding instruction in response to determining that the ID is available, wherein the controller determines whether the ID of the RF signal is on the retransmission list in response to determining that the ID is unavailable, wherein the controller compares the count bit of the RF signal with the increased count bit stored on the retransmission list when the ID of the RF signal is on the retransmission list, wherein the controller disregards the RF signal when the ID is unavailable and the same as the ID stored on the retransmission list, and the count bit of the RF signal is equal to or greater than the increased count bit stored on the retransmission list, without retransmitting the RF signal, and wherein the first condition is that the ID of the RF signal is not on the retransmission list or the count bit of the RF signal is less than the increased count bit stored on the retransmission list.