Method for transmitting beam information by user equipment in wireless communication system, and user equipment and base station supporting same
Disclosed are: a method for transmitting, by a user equipment, beam information of at least one cell among a plurality of cells configured for the user equipment in a wireless communication system comprising the user equipment and a base station including multiple cells; and a user equipment and a base station supporting same. According to an embodiment applicable to the present disclosure, a user equipment can report, to a base station, whether a beam failure for a specific cell occurs and whether a beam having at least a predetermined level of quality exists on the specific cell, and in response thereto, the base station can more efficiently perform beam management on the basis of the report.
1 . A method performed by a user equipment (UE), the method comprising:
detecting a beam failure (BF) in one or more secondary cells among a plurality of secondary cells configured for the UE; and
transmitting, to a base station (BS), beam information related to the detection of the BF in the one or more secondary cells,
wherein the beam information includes first information indicating the detection of the BF in the one or more secondary cells, and second information set to 0 or 1 indicating presence or absence of information related to a candidate reference signal (RS) with a quality greater than or equal to a predetermined threshold value for a beam failure recovery.
2 . The method of claim 1 ,
wherein the beam information further includes candidate beam information for a secondary cell corresponding to the second information indicating the presence of the information related to the candidate RS among the one or more secondary cells, and does not include candidate beam information for a secondary cell corresponding to the second information indicating the absence of the information related to the candidate RS.
3 . The method of claim 2 ,
wherein the candidate beam information comprises:
one or more candidate RS indexes, and
quality information for one or more candidate RSs corresponding to the one or more candidate RS indexes.
4 . The method of claim 3 ,
wherein the quality information comprises a reference signal received power (RSRP) or a signal to interference and noise ratio (SINR) for the one or more candidate RSs.
5 . The method of claim 1 ,
wherein the beam information for the one or more secondary cells includes a bitmap.
6 . The method of claim 1 , further comprising:
based on the detection of the BF in the one or more secondary cells, transmitting, to the BS, a first signal for requesting an uplink resource for transmission of the beam information; and
in response to the first signal, receiving, from the BS, a second signal for allocating the uplink resource.
7 . The method of claim 1 ,
wherein the beam information is transmitted through a physical uplink control channel (PUCCH) or a physical uplink shared channel (PUSCH).
8 . A user equipment (UE) 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:
detecting a beam failure (BF) in one or more secondary cells among a plurality of secondary cells configured for the UE; and
transmitting, to a base station (BS), beam information related to the detection of the BF in the one or more secondary cells,
wherein the beam information includes first information indicating the detection of the BF in the one or more secondary cells, and second information set to 0 or 1 indicating presence or absence of information related to a candidate reference signal (RS) with a quality greater than or equal to a predetermined threshold value for a beam failure recovery.
9 . The UE of claim 8 ,
wherein the UE communicates with at least one of a mobile terminal, a network, or a self-driving vehicle other than a vehicle including the UE.
10 . A base station (BS) 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:
based on a beam failure (BF) being detected in one or more secondary cells among a plurality of secondary cells configured for a user equipment (UE), receiving, from the UE, beam information related to the detection of the BF in the one or more secondary cells; and
performing a beam failure recovery procedure based on the beam information,
wherein, the beam information includes first information indicating the detection of the BF in the one or more secondary cells, and second information set to 0 or 1 indicating presence or absence of information related to a candidate reference signal (RS) with a quality greater than or equal to a predetermined threshold value for a beam failure recovery.