| 摘要 |
PROBLEM TO BE SOLVED: To provide a handoff method, capable of continuously managing a user terminal in the same call control network, even after a handoff in a network environment where a femtocell selects any of among a plurality of call control networks. SOLUTION: A call-control network selecting unit 11 selects any of among an access network NWa and a core network NWc, in response to a connection request from the user terminal. A selection result notifying unit 12 adds a result of selection as call-control network information to the received connection request. A call control executing section 13 transfers the connection request added with the call-control network information to a user terminal of a communication party via the selected network. A call-control network identifying unit 14 identifies a call-control network before a handoff, on the basis of the call-control network information added to a received reconnection request. The call-control executing section 13 transfers the reconnection request to the user terminal of the communication party via the identified call connection network. COPYRIGHT: (C)2011,JPO&INPIT
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