Method and apparatus for performing radio resource management (RRM) measurement in wireless communication system

A terminal performing frequency measurement in a wireless communication system, the terminal comprising:

• a transceiver;
• and
• at least one processor configured to:
• receive, from a base station, by controlling the transceiver, system information comprising first configuration information associated with a frequency measurement and second configuration information associated with a relaxed frequency measurement, wherein the second configuration information comprises an evaluation time TSearchdeltaP for evaluating a low mobility criterion for the terminal with low mobility,
• receive, from the base station, by controlling the transceiver, an indicator indicating whether a frequency measurement for a higher priority frequency having a higher priority than a frequency of a serving cell of the terminal is allowed to be relaxed,
• determine whether to perform the frequency measurement on at least one frequency based on the first configuration information,
• based on determining to perform the frequency measurement on the at least one frequency, determine whether to perform the relaxed frequency measurement for the at least one frequency, based on the indicator and the second configuration information by determining whether the low mobility criterion is fulfilled during the evaluation time TSearchDeltaP, and
• perform the relaxed frequency measurement for the at least one frequency based on a result of the determining whether to perform the relaxed frequency measurement.