Method for sharing radio resource information in multi-cell wireless communication system and apparatus for same

A user equipment (UE) for reporting channel state information (CSI) in a multi-cell wireless communication system, the UE comprising:

• a radio frequency (RF) transceiver;
• and
• a processor configured to:
• control the RF transceiver to receive a configuration for reporting CSI including information of interference measurement resources (IMRs) associated with at least one CSI process, via high layer signaling from a serving cell, and
• control the RF transceiver to report the CSI corresponding to a specific CSI process configured by high layers among the at least one CSI process based on the configuration for reporting CSI when a CSI reference resource associated with the specific CSI process is valid,
• wherein the CSI is reported based on resource-restricted CSI measurements, if two subframe sets for CSI measurement are configured by the configuration for reporting CSI, and
• wherein interference measurement for the CSI is configured to be derived using an IMR among the IMRs associated with one of the two subframe sets, which belong to the CSI reference resource, for the specific process,
• wherein when the CSI reference resource associated with the Specific CSI process is not valid, the reporting the CSI by the RF transceiver is omitted.