Patent ID: 7075909
Filing Date: 2006-07-11
Classification: H04W

Abstract:
1. A radio base station for wirlessly connecting mobile stations in each time slot of a time division multiplex method by space-multiplexing a plurality of transmission signals having different directivity patterns of an adaptive array method, the radio base station comprising: a storage means for storing a table showing how time slots are assigned to the mobile stations that am wirelessly connected; a measuring means for measuring a reception level of a signal received from each mobile station shown in the table; a judging means for judging whether the reception level is no less than a threshold value; a changing means for changing an assignment of the mobile stations and the table so that mobile stations which each have a reception level no less than the threshold value occupy a same time slot; and a control means for reducing a transmission power during a time slot, which is occupied by the mobile stations that each have a reception level no less than the threshold value, to a level that is lower than the transmission power of other time slots.