Method and device for monitoring frequency domain-based wireless link in wireless communication system

A terminal in a wireless communication system, comprising:

• a transceiver;
• and
• a controller coupled with the transceiver and configured to:
• receive, via the transceiver, configuration information associated with a plurality of frequency ranges via higher layer signaling, the plurality of frequency ranges being included in a downlink bandwidth, wherein the configuration information includes a size of each frequency range,
• identify at least one frequency range among the plurality of frequency ranges configured by the higher layer signaling,
• determine a radio link quality as in-sync or out-of-sync based on a channel state information reference signal (CSI-RS) in the at least one frequency range, and
• identify whether a physical layer problem is detected based on an indication of the out-of-sync,
• wherein the radio link quality is determined as the in-sync in case that a radio link quality of at least one resource in resources of the CSI-RS for radio link monitoring is better than a first reference value, and
• wherein the radio link quality is determined as the out-of-sync in case that radio link qualities of all resources of the CSI-RS for radio link monitoring is worse than a second reference value.