| 摘要 |
PROBLEM TO BE SOLVED: To allow optimum allocation of a temporarily available radio frequency band by defining a suitable access rule. SOLUTION: A central control and application logic 51 controls the detection of all personal calls and output calls, and executes different connection and radio channel mergence through a multiplexer 50. At the time of BECT e.g. the logic 51 executes various combination controls of time slots with carrier frequency bands. The selection of a 1st or 2nd antenna 31 or 31' by a switch 53 is also controlled by the logic 51. In order to correctly select a time slot, the logic 51 scans a prescribed communication channel and the existence of interference in the radio frequency band is detected by a scanning means 52. When there is an available free communication channel, the means 52 allocates the channel and mutually exchanges a remote unit concerned and correct application information under the control of the logic 51 to establish communication by the channel. |
