MOBILE COMMUNICATION SYSTEM, CALL PROCESSING NODE, AND COMMUNICATION CONTROL METHOD

A mobile communication system includes a plurality of call processing servers and a call processing management database that holds data necessary for call processing. The call processing server includes a call processing request accepting unit that accepts a request for call processing, a registration unit that registers the own node as the call processing server that is executing the call processing, an acquisition unit that acquires information of the mobile communication terminal related to the call processing request from the call processing management database or from the call processing server registered as the call processing server that is executing the call processing, a call processing unit that perform call processing, and a call processing result storage unit that stores information of a result of the call processing in the call processing management database.