Method and apparatus for prohibiting cell reselection procedure during data communication by user equipment in wireless communication system

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

• a memory;
• and
• at least one processor coupled to the memory and configured to:
• measure neighboring cells while the UE is in a radio resource control (RRC) inactive state or a RRC idle state in a wireless communication system;
• identify one of the neighboring cells for which conditions for a cell reselection procedure are fulfilled, based on a result of measuring;
• determine whether to perform the cell reselection procedure with the one of the neighboring cells by considering a timer;
• and
• transmit an uplink data or receiving a downlink data, without performing the cell reselection procedure while the timer is running, based on a determination not to perform the cell reselection procedure,
• wherein the timer is started based on generation of an uplink data or based on reception of a paging message for receiving a downlink data.