Method for performing uplink transmission in wireless communication system and apparatus therefor

A user equipment (UE) transmitting an uplink data channel in a wireless communication system, the UE comprising:

• a transceiver;
• at least one processor controlling the transceiver;
• and
• at least one memory functionally connected to the at least one processor,
• wherein the at least one processor is configured to
• receive configuration information related to the uplink data channel, wherein the configuration information is related to linkage between each of first sounding reference signal (SRS) resource sets for uplink data channel transmission and each of second SRS resource sets for beam management,
• receive control information for scheduling transmission of the uplink data channel, wherein an SRS resource indicator (SRI) in the control information is related to dynamic selection only with respect to one or more of the second SRS resource sets linked to one or more of the first SRS resource sets for the scheduled transmission of the uplink data channel, and
• transmit the uplink data channel based on the control information,
• wherein the configuration information includes one or more configurations including at least one of i) a transmission unit or ii) a beam, which are related to the transmission of the uplink data channel,
• wherein based on the one or more configurations, the control information includes information indicating a transmission unit and a beam to be applied to the transmission of the uplink data channel, and
• wherein the transmission unit is related to the one or more of the second SRS resource sets, and the beam to be applied to the transmission of the uplink data channel is related to the SRI.

An apparatus transmitting an uplink data channel in a wireless communication system, the apparatus comprising:

• at least one processor;
• and
• at least one memory functionally connected to the at least one processor,
• wherein the at least one processor is configured to
• receive configuration information related to the uplink data channel, wherein the configuration information is related to linkage between each of first sounding reference signal (SRS) resource sets for uplink data channel transmission and each of second SRS resource sets for beam management,
• receive control information for scheduling transmission of the uplink data channel, wherein an SRS resource indicator (SRI) in the control information is related to dynamic selection only with respect to one or more of the second SRS resource sets linked to one or more of the first SRS resource sets for the scheduled transmission of the uplink data channel, and
• transmit the uplink data channel based on the control information,
• wherein the configuration information includes one or more configurations including at least one of i) a transmission unit or ii) a beam, which are related to the transmission of the uplink data channel,
• wherein based on the one or more configurations, the control information includes information indicating a transmission unit and a beam to be applied to the transmission of the uplink data channel, and
• wherein the transmission unit is related to the one or more of the second SRS resource sets, and the beam to be applied to the transmission of the uplink data channel is related to the SRI.