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 at 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 similarity of a transition of a degree of operation between the each pair of base station systems;
• classifying, based on the degree of similarity, the plurality of base station systems into a plurality of base station system groups;
• and
• executing, in accordance with a predetermined rule, operation control corresponding to the degree of operation of a leader base station system included in one of the plurality of base station system groups, with respect to a follower base station system included in the one of the plurality of base station system groups,
• wherein executing comprises executing, in accordance with occurrence of a predetermined event, operation control different from the operation control performed in accordance with the predetermined rule, for the follower base station system which is included in one of the plurality of base station system groups, and in which the degree of similarity of the transition of the degree of operation with respect to the leader base station system is smaller than a predetermined magnitude.