Method for transmitting/receiving uplink channel in wireless communication system, and device therefor

1. A method for transmitting, by a user equipment (UE), an uplink control channel in a wireless communication system, the method comprising:

receiving, from a base station via higher layer signaling, beam information for a transmission of the uplink control channel; and

transmitting, to the base station, the uplink control channel, via at least one beam configured based on the beam information,

wherein the beam information includes information for a pre-configured beam set including the at least one beam,

wherein the at least one beam is related to a reference signal which is transmitted and received between the base station and the UE,

wherein the at least one beam is based on a single beam or a plurality of beams in the pre-configured beam set,

wherein the at least one beam is configured to be the plurality of beams in the pre-configured beam set based on a specific condition being satisfied, and

wherein the specific condition is configured to be satisfied based on that a value represented by measurement information for the reference signal is smaller than a pre-configured threshold.

2. The method of claim 1 , wherein the pre-configured threshold is configured differently according to the number of beams of the plurality of beams.

3. The method of claim 1 , wherein the reference signal includes a CSI-RS, and

wherein the measurement information includes at least one of a channel quality indicator, received power information, or received quality information.

4. The method of claim 1 , wherein when the UE transmits the uplink control channel via a plurality of beams, the plurality of beams belongs to one of a plurality of pre-configured beam sets.

5. The method of claim 1 , further comprising:

receiving at least one of information representing whether to apply the at least one beam, information representing the number of beams, or information representing at least one beam index to be used for transmitting the uplink control channel.

6. The method of claim 1 , further comprising:

receiving, from the base station, beam configuration information related to transmission of the uplink control channel,

wherein the beam configuration information includes first beam configuration information for a single beam and second beam configuration information for a plurality of beams, and

wherein each of the first beam configuration information and the second beam configuration information includes at least one of resource information, time offset information, or period information related to the transmission of the uplink control channel.

7. The method of claim 1 , wherein the UE is configured to report uplink control information periodically or semi-persistently, via the uplink control channel.

8. The method of claim 1 , wherein the beam information includes beam index information for the at least one beam.

9. The method of claim 1 , wherein the reference signal is a Channel State Information-Reference Signal (CSI-RS), and

wherein the uplink control channel is transmitted through one or more pre-configured CSI reporting resources.

10. The method of claim 9 , wherein a beam configuration for the transmission of the uplink control channel is configured for each of the one or more pre-configured CSI reporting resources.

11. The method of claim 1 , wherein the number of the at least one beam is determined based on at least one of measurement information by the reference signal or a type of uplink control information transmitted via the uplink control channel.

12. A UE for transmitting an uplink control channel in a wireless communication system, the UE comprising:

a Radio Frequency (RF) unit for transmitting and receiving a radio signal; and

a processor functionally connected to the RF unit,

wherein the processor is configured to:

receive, from a base station via higher layer signaling, beam information for a transmission of the uplink control channel; and

transmit, to the base station, the uplink control channel, via at least one beam configured based on the beam information,

wherein the beam information includes information for a pre-configured beam set including the at least one beam,

wherein the at least one beam is related to a reference signal which is transmitted and received between the base station and the UE,

wherein the at least one beam is based on a single beam or a plurality of beams in the pre-configured beam set,

wherein the at least one beam is configured to be the plurality of beams in the pre-configured beam set based on a specific condition being satisfied, and

wherein the specific condition is satisfied based on that a value represented by measurement information for the reference signal is smaller than a pre-configured threshold.

13. A method for receiving, by a base station, an uplink control channel in a wireless communication system, the method comprising:

transmitting, to a user equipment via higher layer signaling, beam information for a transmission of the uplink control channel; and

receiving, from the user equipment, the uplink control channel, via at least one beam configured based on the beam information,

wherein the beam information includes information for a pre-configured beam set including the at least one beam,

wherein the at least one beam is related to a reference signal which is transmitted and received between the base station and the user equipment,

wherein the at least one beam is based on a single beam or a plurality of beams in the pre-configured beam set,

wherein the at least one beam is configured to be the plurality of beams in the pre-configured beam set based on a specific condition being satisfied, and

wherein the specific condition is satisfied based on that a value represented by measurement information for the reference signal is smaller than a pre-configured threshold.