Radio communication systems, base stations, radio communication methods, and programs

A radio communication system having a terminal and a base station that executes a control that determines whether or not said base station can accommodate a terminal that is the control target, from among terminals for which said base station executes an adaptive modulation that adaptively changes combinations of modulation systems and code rates, that belongs to a QoS (Quality of Service) class that necessitates reservation of a bandwidth when said base station execute said adaptive modulation,

• wherein said base station includes:
• a decision unit that computes an allowable throughput of each terminal for each of said combinations in the case in which said base station accommodates a predetermined accommodation number of terminals in advance, compares a minimum reserved traffic rate of the terminal that is the control target and said allowable throughput, and decides a minimum physical rate at which the bandwidth is reserved based on the compared results;
• and
• a control unit that executes said control for said terminal that is the control target postulating that the adaptive modulation is executed for said terminal that is the control target at the minimum physical rate decided by said decision unit.