BASE STATION IN MOBILE COMMUNICATIONS SYSTEM AND DATA TRANSFER METHOD

PROBLEM TO BE SOLVED: To reduce the problem that a target base station (T-eNB) transfer unnecessary data to user equipment (UE) when a handover is performed between a source base station (S-eNB) and the target base station (T-eNB).SOLUTION: A base station includes: an address management unit that extracts a data transfer source address (ADDR) from a handover request message received from the S-eNB, delivers a transfer destination address (ADDR) corresponding to the transfer source address ADDR, and manages the correspondence relationship between the ADDRand the ADDR; a network communications unit that notifies the S-eNB of the ADDRby using a handover request confirmation message, and receives transfer data from the S-eNB, in the ADDR; and a conditions determination unit that browses the correspondence relationship and determines whether or not to transfer the received transfer data to the UE, in accordance with whether or not the ADDRfor the received transfer data corresponds to the ADDR.