In a radio communication system that conducts a communication between a radio base station and a radio communication terminal, the radio base station and the radio communication terminal conduct communication though traffic in a shared frequency utilizing white space in addition to a dedicated frequency allocated to the radio communication system. The system incorporates an integral control apparatus having N string units and a single process unit. Potential active links for an active path are identified in response to a given request, and potential backup links to form a backup path for restoring the active path, are also identified in response to the given request.