RADIO COMMUNICATION SYSTEM AND RADIO COMMUNICATION METHOD

摘要

PROBLEM TO BE SOLVED: To enable a plurality of transmission station devices to simultaneously perform radio communication by high system throughput at the same high frequency, without deteriorating characteristics.SOLUTION: For terminal stations 2001-1 to 2001-N1 subordinate to a base station 1001 and terminal stations 2002-1 to 2002-M2 which are subordinate to another base station and have reception sensitivity equal to or more than a predetermined threshold, the base station 1001 performs feed back to channel information to perform interference control (null directivity control). For terminal stations 2002-(M2+1) to 2002-N2 which are subordinate to the other base station and have reception sensitivity less than the predetermined threshold, the base station 1001 calculates transmission weight by a transmission beam forming method which neither performs feed back to the channel information nor performs interference control. A plurality of base stations 1001 and 1002 use the calculated transmission weight to simultaneously transmit data to subordinates terminal stations 2001-1 to 2001-N1 and 2002-1 to 2002-N2 at the same frequency.