For each of a plurality of call processing control units constituting the radio base station equipment, an initiation condition minimally necessary for restarting call processing is set. A maintenance supervision and control unit in the base station decides whether each call processing control unit satisfies the above initiation condition. Even when the entire plurality of call processing control units do not satisfy the initiation condition, the call processing control is made to restart only in the call processing control unit having satisfied the initiation condition. Thus, the suspension time in the base station is reduced, restraining the influence upon users to the minimum.