CONTROL STATION, MOBILE STATION, MOBILE COMMUNICATION SYSTEM AND MOBILE COMMUNICATION METHOD

摘要

When performing a handover from an access network B to an access network A, a UE 10 transmits an attach request to anMME30. MME 30 establishes a bearer on a first access network based on the attach request. UE 10 requests MME 30 to establish a specific bearer that guarantees the necessary QoS for a flow. MME 30 receives the request for establishment of a specific bearer, establishes a specific bearer that guarantee the QoS for the flow and sets up a path for performing communication of the flow between UE 10 and a PGW 20. This enables the mobile station to select a specific flow among a plurality of flows and be directly handed over to the bearer communication path when the mobile station performs a handover, thus providing a mobile communication system and the like that can realize a handover while maintaining communication quality.