Method and apparatus for performing handover

A method for performing a handover by a base station (BS) in a wireless communication system, the method comprising:

• transmitting information on candidate target cells for the handover and a handover condition, to a user equipment (UE),
• wherein a handover to a first target cell is initiated by the UE among the candidate target cells based on the handover condition,
• wherein the handover to the first target cell is stopped by the UE before detecting a failure of the handover to the first target cell, when channel quality of a second target cell among the candidate target cells is higher than channel quality of the first target cell, and
• wherein a handover to the second target cell is performed by the UE.

A user equipment (UE) configured to perform a handover in a wireless communication system, the UE comprising:

• a transceiver;
• at least one processor;
• and
• at least one computer memory operably connectable to the at least one processor and storing instructions that, when executed, cause the at least one processor to perform operations comprising:
• receiving information on candidate target cells for the handover and a handover condition, from a base station;
• initiating a handover to a first target cell among the candidate target cells, based on the handover condition;
• before detecting a failure of the handover to the first target cell, when channel quality of a second target cell among the candidate target cells is higher than channel quality of the first target cell, stopping the handover to the first target cell;
• and
• performing a handover to the second target cell.