Method and apparatus for performing priority based cell reselection

A user equipment capable of performing priority based inter-radio access technology (inter-RAT) cell reselection in a wireless communication system, the user equipment comprising:

• a transceiver configured to send and receive signals;
• and
• at least one processor configured to:
• check, when signal strength of a serving cell becomes less than a preset threshold of a radio access technology (RAT) associated with the serving cell, presence of a candidate cell meeting a first condition, the first condition being a condition where signal strength of the candidate cell is greater than a preset threshold of a RAT associated with the candidate cell for a time duration T_Reselection,
• select a highest priority cell as a first cell among candidate cells satisfying the first condition for the time duration T_Reselection, and
• check, after selecting the first cell, presence of a second cell whose priority is higher than that of the first cell and whose signal strength is greater than a preset threshold of a RAT associated with the second cell.