Control system and control method

A control system, comprising:

• at least one processor;
• and
• at least one memory device storing instructions which, when executed by the least one processor, cause the at least one processor to perform operations comprising:
• identifying, for each pair of base station systems included in a plurality of base station systems, a degree of correlation of a transition of a degree of operation between the each pair of base station systems;
• classifying, based on the degree of correlation identified for the each pair of base station systems, the plurality of base station systems into a plurality of base station system groups;
• executing, for each of the plurality of base station system groups, operation control corresponding to the degree of operation of a leader base station system included in the each of the plurality of base station system groups, with respect to a follower base station system included in the each of the plurality of base station system groups;
• and
• removing, in accordance with a fact that a magnitude of a deviation of a ratio of the degree of operation of a follower base station system included in one of the plurality of base station system groups with respect to the degree of operation of a leader base station system included in the one of the plurality of base station system groups from a given reference ratio has satisfied a predetermined condition, the follower base station system from the one of the plurality of base station system groups.