| 摘要 |
PROBLEM TO BE SOLVED: To prevent unnecessary retransmission processing in transmission of a link establishment signal and a sensor information signal, and further to improve transmission efficiency of sensor information.SOLUTION: A retransmission control method of a sensor device in which a link is established by sending and receiving a link establishment signal and its response signal to and from a center device through a network controller, and then sending and receiving a sensor information and its response signal so as to transmit sensor information to the center device includes: monitoring timeouts of the respective response signals on condition that T1>T2, where T1 is a retransmission timeout time of the response signal to the link establishment signal and T2 is a retransmission timeout time of the response signal to the sensor information signal; and performing retransmission processing from the link establishment signal when the response signal to the link establishment signal reaches a timeout with T1 or when the response signal to the sensor information signal reaches a timeout with T2. |
