| 摘要 |
PURPOSE:To improve the use efficiency of a radio channel by making a broadcasting communication similar to MCA by using plural base stations which are arranged indoors. CONSTITUTION:This system is equipped with a base station 32 and plural mobile stations 33 which are connected by a bi-directional radio line and a control station 31 is equipped with a means which performs control so that one control channel and (n) speaking channels different from the control channel are assigned to the radio line and speaking line is set by selecting one of (n) speaking channels by the base station 32 and mobile stations 33 by utilizing the control channel. The base station 32 sends a signal instructing a broadcasting communication mode to mobile stations 33 belonging to one group among the plural mobile stations 33, and the mobile stations 33 are so set as to receive the same channels continuously and automatically among the (n) speaking channels when the signal is received. The radio channels are controlled and used independently by the respective base stations, so an optional number of base stations can be accommodated. |
