Method and apparatus for mobility enhancement of user equipment in communication network

A terminal comprising at least one processor, wherein the at least one processor causes the terminal to perform:

• receiving, from a source cell, a radio resource control (RRC) reconfiguration message;
• measuring a signal strength of each of a plurality of channel state information-reference signals (CSI-RSs) respectively received from a plurality of candidate cells, based on the RRC reconfiguration message;
• transmitting, to the source cell, a measurement result of the signal strengths;
• receiving, from the source cell, a CSI-RS activation indication message for each of at least two candidate cells among the plurality of candidate cells, based on the measurement result of the signal strengths;
• receiving, from the source cell, a cell switch command (CSC) for a target cell among the at least two candidate cells;
• and
• transmitting, for performing cell switching from the source cell to the target cell based on the cell switch command, a multiplexed message including a CSI report based on a CSI measurement result for the target cell and an RRC reconfiguration complete message.