Method for performing beam failure recovery procedure in wireless communication system, and device therefor

A user equipment (UE) performing a beam failure recovery (BFR) in a wireless communication system, the UE comprising:

• one or more transceivers;
• one or more processors configured to control the one or more transceivers;
• and
• one or more memories operatively connected to the one or more processors and configured to store instructions performing operations based on being executed by the one or more processors,
• wherein the operations comprise:
• receiving configuration information which is related to the BFR, wherein the configuration information includes information for i) a Beam Failure Detection Reference Signal (BFD RS) set and ii) a RS set for candidate beam identification;
• performing a beam failure detection, wherein the beam failure detection is performed based on a measurement for the BFD RS set;
• transmitting a beam failure recovery request (BFRQ) based on a Physical Uplink Control Channel (PUCCH) resource;
• and
• transmitting a Medium Access Control-Control Element (MAC-CE) related to the BFR which includes information for a RS determined based on the RS set for the candidate beam identification,
• wherein, i) based on the BFD RS set being based on a plurality of BFD RS sets, ii) based on each of the plurality of BFD RS sets being related to each of a plurality of Transmission and Reception Points (TRPs) and iii) based on the RS set for the candidate beam identification being based on a plurality of RS sets for the candidate beam identification:
• each of the plurality of RS sets for the candidate beam identification is related to each of the plurality of BFD RS sets, respectively,
• the BFRQ is transmitted based on one of a plurality of PUCCH resources which are configured to be associated with the plurality of BFD RS sets,
• the MAC-CE related to the BFR includes i) information for at least one BFD RS set and ii) information for at least one RS,
• the information for at least one RS includes an ID of a RS determined based on one of the plurality of RS sets for the candidate beam identification, and
• the information for at least one BFD RS set includes an ID for a BFD RS set in which the beam failure is detected among the plurality of BFD RS sets.

A method of performing, by a base station, a beam failure recovery (BFR) in a wireless communication system, the method comprising:

• transmitting configuration information which is related to the BFR, wherein the configuration information includes information for i) a Beam Failure Detection Reference Signal (BFD RS) set and ii) a RS set for candidate beam identification;
• based on a beam failure detection, receiving a beam failure recovery request (BFRQ) based on a Physical Uplink Control Channel (PUCCH) resource, wherein the beam failure detection is performed, by a user equipment (UE), based on a measurement for the BFD RS set,
• receiving a Medium Access Control-Control Element (MAC-CE) related to the BFR which includes information for a RS determined based on the RS set for the candidate beam identification,
• wherein, i) based on the BFD RS set being based on a plurality of BFD RS sets, ii) based on each of the plurality of BFD RS sets being related to each of a plurality of Transmission and Reception Points (TRPs) and iii) based on the RS set for the candidate beam identification being based on a plurality of RS sets for the candidate beam identification:
• each of the plurality of RS sets for the candidate beam identification is related to each of the plurality of BFD RS sets, respectively,
• the BFRQ is received based on one of a plurality of PUCCH resources which are configured to be associated with the plurality of BFD RS sets,
• the MAC-CE related to the BFR includes i) information for at least one BFD RS set and ii) information for at least one RS,
• the information for at least one RS includes an ID of a RS determined based on one of the plurality of RS sets for the candidate beam identification, and
• the information for at least one BFD RS set includes an ID for a BFD RS set in which the beam failure is detected among the plurality of BFD RS sets.