A method performed by a first base station (120, 120a, 120x; 600) for supporting a handover of a terminal (100; 700), the method comprising: receiving, from a second base station (120, 120b, 120y, 120y'; 600), a radio link failure, RLF, indication message including an RLF report for the terminal (100; 700); identifying whether the RLF indication message includes RRC connection setup indicator information; determining whether a cell in which an RRC connection reestablishment has been attempted by the terminal (100; 700) after RLF (210, 230, 260) is a suitable cell to serve the terminal (100; 700) at a time of the RLF (210, 230, 260), based on the RLF report and an identified result whether the RLF indication message includes the RRC connection setup indicator information, wherein the RLF report includes information on an evolved-universal terrestrial radio access network, E-UTRAN, cell global identity, ECGI, of the cell in which the RRC connection reestablishment has been attempted by the terminal (100; 700) after the RLF (210, 230, 260); and transmitting a handover report message for notifying information on a connection failure to the second base station (120, 120b, 120y, 120y'; 600) or a third base station (120, 120y'; 600) that requires a mobility parameter control based on a result of the determination, wherein if the RRC connection setup indicator information is not included in the RLF indication message, it is determined that the cell in which the RRC connection reestablishment has been attempted by the terminal (100; 700) after the RLF (210, 230, 260) is the suitable cell to serve the terminal (100; 700) at the time of the RLF (210, 230, 260), wherein if the RRC connection setup indicator information is included in the RLF indication message, it is determined that the cell in which the RRC connection reestablishment has been attempted by the terminal (100; 700) after the RLF (210, 230, 260) is an unsuitable cell to serve the terminal (100; 700) at the time of the RLF (210, 230, 260), and wherein if the RRC connection setup indicator information is included in the RLF indication message, it is determined that the second base station from which the RLF report is received includes a connection reestablishment failure cell or a cell to which the terminal (100; 700) has been handovered just after the connection reestablishment. receiving, from a second base station (120, 120b, 120y, 120y'; 600), a radio link failure, RLF, indication message including an RLF report for the terminal (100; 700); identifying whether the RLF indication message includes RRC connection setup indicator information; determining whether a cell in which an RRC connection reestablishment has been attempted by the terminal (100; 700) after RLF (210, 230, 260) is a suitable cell to serve the terminal (100; 700) at a time of the RLF (210, 230, 260), based on the RLF report and an identified result whether the RLF indication message includes the RRC connection setup indicator information, wherein the RLF report includes information on an evolved-universal terrestrial radio access network, E-UTRAN, cell global identity, ECGI, of the cell in which the RRC connection reestablishment has been attempted by the terminal (100; 700) after the RLF (210, 230, 260); and transmitting a handover report message for notifying information on a connection failure to the second base station (120, 120b, 120y, 120y'; 600) or a third base station (120, 120y'; 600) that requires a mobility parameter control based on a result of the determination, wherein if the RRC connection setup indicator information is not included in the RLF indication message, it is determined that the cell in which the RRC connection reestablishment has been attempted by the terminal (100; 700) after the RLF (210, 230, 260) is the suitable cell to serve the terminal (100; 700) at the time of the RLF (210, 230, 260), wherein if the RRC connection setup indicator information is included in the RLF indication message, it is determined that the cell in which the RRC connection reestablishment has been attempted by the terminal (100; 700) after the RLF (210, 230, 260) is an unsuitable cell to serve the terminal (100; 700) at the time of the RLF (210, 230, 260), and wherein if the RRC connection setup indicator information is included in the RLF indication message, it is determined that the second base station from which the RLF report is received includes a connection reestablishment failure cell or a cell to which the terminal (100; 700) has been handovered just after the connection reestablishment.