Method and apparatus for mobility management in wireless communication system

A wireless device in a wireless communication system comprising:

• a transceiver;
• a memory;
• and
• at least one processor operatively coupled to the transceiver and the memory, and configured to:
• control the transceiver to receive mobility commands of candidate cells, mobility conditions for the candidate cells, and information for a timer,
• determine a first target cell among the candidate cells which satisfies a mobility condition for the first target cell,
• after determining the first target cell, determine a second target cell among the candidate cells which satisfies a mobility condition for the second target cell while the timer is running, wherein a priority of the second target cell is higher than a priority of the first target cell, and
• perform a mobility to the second target cell based on a mobility command of the second target cell.

A computer-readable medium having recorded thereon a program for performing each step of a method on a computer, the method comprising:

• receiving mobility commands of candidate cells, mobility conditions for the candidate cells, and information for a timer;
• determining a first target cell among the candidate cells which satisfies a mobility condition for the first target cell;
• after determining the first target cell, determining a second target cell among the candidate cells which satisfies a mobility condition for the second target cell while the timer is running, wherein a priority of the second target cell is higher than a priority of the first target cell;
• and
• performing a mobility to the second target cell based on a mobility command of the second target cell.