RADIO COMMUNICATION SYSTEM

摘要

PROBLEM TO BE SOLVED: To provide a dealing method of a radio communication system capable of always realizing communication from a detector to a center. SOLUTION: A radio master device 5 retry-transmits a test signal to a radio slave device 6a at a prescribed time periodically, for example, once a day. In this case, the information of the transmitting time or the number of times of test is superimposed on the test signal. The radio master device 5 retry- transmits the test signal to the radio slave device 6a three times every two minutes on the first day, The radio slave device 6a is not able to receive the test signal three times due to any factor. The radio master device 6 transmits the test signal to the radio slave device 6a three times on the second day and the third day. The radio slave device 6a is not able to receive the test signal due to any factor on the second day or the third day in the same way as the first day. The radio master device 5 transmits the warning signal of communication abnormality to a center 2 after the lapse of a specific time of the counter of a timer control circuit 13.