Wireless communication system, wireless communication method, centralized control device and centralized control program

A wireless communication method of centrally controlling each of a plurality of base stations that accommodates wireless terminals, the wireless communication method comprising:

• calculating, for target wireless terminals accommodated by the base stations, a ratio of an amount of transmittable traffic of the target wireless terminal based on a channel and bandwidth allocated to the base station to an amount of accommodated traffic per target wireless terminal as a utility function;
• and
• performing control to change the channel and bandwidth of the base station so as to increase the utility function calculated in the calculating.

A centralized control device that centrally controls each of a plurality of base stations that accommodates wireless terminals, the centralized control device comprising:

• utility function calculation circuitry configured to calculate, for target wireless terminals accommodated by the base stations, a ratio of an amount of transmittable traffic of the target wireless terminal based on a channel and bandwidth allocated to the base station to an amount of accommodated traffic per target wireless terminal as a utility function;
• and
• change control circuitry configured to perform control to change the channel and bandwidth of the base station so as to increase the utility function calculated by the utility function calculation circuitry.