Uplink transmission/reception method in wireless communication system and device therefor

A user equipment (UE) configured to perform uplink transmission in a wireless communication system, the UE comprising:

• a radio frequency (RF) unit;
• at least one processor;
• and
• at least one computer memory operably connectable to the at least one processor and storing computer instructions that, when executed, cause the at least one processor to perform operations comprising:
• performing a plurality of sounding reference signal (SRS) transmissions, to a base station, on a plurality of SRS resources configured for the UE;
• receiving, from the base station through the RF unit, a transmission grant for the UE to perform the uplink transmission, wherein the transmission grant includes an SRS resource indication (SRI) that indicates an SRS resource among the plurality of SRS resources on which the plurality of SRS transmissions were performed by the UE;
• determining a precoding for the uplink transmission based at least on the SRS resource indicated by the SRI in the transmission grant;
• and
• performing the uplink transmission through the RF unit to the base station by applying the precoding that was determined based at least on the SRS resource indicated by the SRI in the transmission grant.

A method of receiving, by a base station, an uplink transmission from a user equipment (UE) in a wireless communication system, the method comprising:

• receiving, from the UE, a plurality of sounding reference signal (SRS) transmissions on a plurality of SRS resources configured for the UE;
• transmitting, to the UE, a transmission grant for the UE to perform the uplink transmission, wherein the transmission grant includes an SRS resource indication (SRI) that indicates an SRS resource among the plurality of SRS resources on which the plurality of SRS transmissions were received from the UE;
• and
• receiving, from the UE, the uplink transmission that has been precoded by the UE with a precoding that is based at least on the SRS resource indicated by the SRI in the transmission grant.

A base station configured to receive an uplink transmission from a user equipment (UE) in a wireless communication system, the base station comprising:

• a radio frequency (RF) unit;
• at least one processor;
• and
• at least one computer memory operably connectable to the at least one processor and storing computer instructions that, when executed, cause the at least one processor to perform operations comprising:
• receiving, from the UE through the RF unit, a plurality of sounding reference signal (SRS) transmissions on a plurality of SRS resources configured for the UE;
• transmitting, to the UE through the RF unit, a transmission grant for the UE to perform the uplink transmission, wherein the transmission grant includes an SRS resource indication (SRI) that indicates an SRS resource among the plurality of SRS resources on which the plurality of SRS transmissions were received from the UE;
• and
• receiving, from the UE through the RF unit, the uplink transmission that has been precoded by the UE with a precoding that is based at least on the SRS resource indicated by the SRI in the transmission grant.