Patent ID: 8831609

Claim:
A control node connected between multiple base stations which perform communication between terminals using multiple carriers, these multiple base stations and a network, soft handoff of said terminal being performed among these multiple base stations, wherein said node has: a first network interface part that performs transmission and reception of communication data of said terminal with said network; a second network interface part that performs transmission and reception of communication data of said terminal between first and second base stations; and a control part, wherein, when said terminal is in a soft handoff state between said first and second base stations, said second network interface part receives communication quality information about multiple carriers between this first or second base station and this terminal via said first or second base station, and wherein, the control part determines termination of a soft handoff of at least a second carrier based on the received communication quality information about said terminal from said first or second base station at least a first carrier, and notifies a network side soft handoff termination message which instructs the termination of a soft handoff of at least a second carrier to said terminal from said first or second base station.