| 摘要 |
PROBLEM TO BE SOLVED: To provide a communication channel designating system, which removes a radio interference (e.g. interferences due to that a communication channel, when a radio station 3 communicates with a radio station 4 is adjacent to a communication channel, when a calling radio station 1 communicates with a radio station 2 to be called) due to an adjacent communication channel, and which can effectively use a plurality of communication channels. SOLUTION: Each radio station has a field strength measuring unit 11 and a controller 12. The field strength of a control signal 5, transmitted by another ratio station, is measured by the measuring unit 11. When the field strength measured by the controller 12 is a predetermined value or larger and when it is not called by another radio station, the controller 12 designates a communication channel which is different from that superimposed as data on the control signal 5 and which is not adjacent to the channel, further superimposes the designated channel as data on a control signal 7, and transmits the signal. |
