Patent ID: 8886248

Claim:
A base station which communicates with a plurality of terminals in a wireless communication system by radio, comprising a controller of the base station configured to: divide a frequency band allocated to the wireless communication system into a plurality of frequency bands; when a first frequency band of the plurality of frequency bands is allocated to a first terminal group and a second frequency band is allocated to a second terminal group different from the first terminal group to make communication, then control a total transmission power for the first and the second terminal groups to be equal to or smaller than a threshold value of a maximum total transmission power previously set for the base station; and fix a transmission power per sub-carrier in the first frequency band, comprising: calculating the transmission power per sub-carrier based on a target transmission power of each of the plurality of terminals for satisfying a previously set threshold in the second frequency band; comparing a value of the total transmission power with the maximum total transmission power; adjusting power based on the calculation of the transmission power per sub-carrier in a case in which a value of the maximum total transmission power is less than the threshold value; and further calculating the total transmission power when an increased number of terminals among the plurality of terminals are to be allocated to the first terminal group in a case in which the value of the maximum total transmission power is greater than or equal to the threshold value.