| 摘要 |
PURPOSE:To increase number of branched routes effectively by grouping properly plural routes of a radio station having the plural branched routes using a same frequency band and applying switching control to a time when a signal is sent in the unit of each group by a prescribed method. CONSTITUTION:For example, routes B, D, F are grouped as group 1 and routes C, E are grouped as a group 2, and radio stations A, B, D, F connecting to the routes belonging to the group 1 make transmission/reception for a time T at a time interval 2T0 of t0, t2, t4,..., where T is shorter than the time T0. Moreover, radio stations A,C, E connecting to the routes belonging to the group 2 make transmission/reception for a time T at a time interval 2T0 of t1, t3, t5,.... Thus, signal transmission is implemented without simultaneous transmission/reception between the radio stations belonging to the group 1 and the radio stations belonging to the group 2 to generate lots of route number. |
