| 摘要 |
PURPOSE:To improve the utilizing efficiency of a control channel by demultiplexing a control channel into a 1st control channel assigned to each subscriber and a 2nd control channel into a used in common to plural subscribers. CONSTITUTION:A signal received from a terminal via an incoming interface line 71 is demultiplexed into information channel (B channel) and control channel (D channel) by a demultiplexer (DMUX) 81. The D channel is demultiplexed into call control information and packet form user information by a frame demultiplex circuit 82, the call control information is multiplexed again with the B channel by a multiplexer (MUX) 83 and the result is sent to a mobile radio transmitter-receiver 9. On the other hand the user information demultiplexed by the circuit 82 is added with an identification number of the transmitter-receiver 9 under the control of a control circuit 84 and sent through a channel of a frequency F2 used in common by plural subscribers. Thus, the efficient use of the entire control channels is attained. |
