| 摘要 |
PROBLEM TO BE SOLVED: To provide a frequency sharing type radio communication system capable of suppressing influence on a receiver in a primary system.SOLUTION: A radio communication system has a configuration in which each on-vehicle device (MT1, MT2, and MT3) extends backoff time conformed to a normal CSMA/CA to transmission postponement time obtained by adding postponement addition time to the backoff time every time the on-vehicle device detects a radio signal transmitted by another on-vehicle device (MT1, MT2, and MT3), only when the on-vehicle device exists within a service area of a primary system 20a. Thereby, each on-vehicle device (MT1, MT2, and MT3) configuring the radio communication system performs transmission postponement so as not to give burst interference with a television (TV1) in the primary system 20a in transmitting a radio signal, which makes it possible to suppress radio disturbance of the television (TV1). |
