Beam failure reporting method of terminal in wireless communication system, and terminal and base station supporting same

A terminal configured with a plurality of cells and configured to report a beam failure (BF) in a wireless communication system, the terminal comprising:

• at least one transmitter;
• at least one receiver;
• at least one processor;
• and
• at least one memory operatively coupled to the at least one processor and configured to store instructions causing, when executed, the at least one processor to perform a specific operation,
• wherein the specific operation comprises:
• receiving, from a base station, configuration information for a plurality of trigger states related to aperiodic channel state information (CSI) reporting;
• and
• based on (i) a control signal related to one trigger state among the plurality of trigger states, and (ii) detection of occurrence of the BF in at least one of the plurality of cells, transmitting, to a base station, BF information based on beam information related to at least one second cell in which the BF has occurred among one or more first cells related to the one trigger state.

A base station including a plurality of cells and configured to receive beam failure (BF) information in a wireless communication system, the base station comprising:

• at least one transmitter;
• at least one receiver;
• at least one processor;
• and
• at least one memory operatively coupled to the at least one processor and configured to store instructions causing, when executed, the at least one processor to perform a specific operation,
• wherein the specific operation comprises:
• transmitting, to the terminal, configuration information for a plurality of trigger states related to aperiodic channel state information (CSI) reporting;
• based on (i) one of the plurality of trigger states and (ii) a BF occurring in at least one of a plurality of cells configured for the terminal, receiving, from the terminal, the BF information based on beam information related to at least one second cell in which the BF has occurred among one or more first cells related to the one trigger state;
• and
• recognizing the occurrence of the BF in the at least one second cell based on the BF information.