Method and apparatus for uplink transmission and reception in a wireless communication system

A User equipment (UE) configured to transmit an uplink shared channel in a wireless communication system, the UE comprising:

• a transceiver;
• at least one processor;
• and
• at least one computer memory operably connectable to the at least one processor and storing instructions that, based on being executed by the at least one processor, perform operations comprising:
• receiving, from a base station, Downlink Control Information (DCI) for scheduling the uplink shared channel, wherein the DCI comprises a field for a Sounding Reference Signal (SRS) resource indicator (SRI), and wherein each state of the field is related with an identifier for a power control information;
• determining a transmission power for the uplink shared channel, using the power control information determined based on the field of the DCI;
• and
• transmitting the uplink shared channel to the base station based on the transmission power.

An apparatus for transmitting a uplink shared channel in a wireless communication system, the apparatus comprising:

• at least one processor;
• and
• at least one computer memory operably connectable to the at least one processor and storing instructions that, based on being executed by the at least one processor, perform operations comprising:
• receiving, from a base station, downlink control information (DCI) for scheduling the uplink shared channel, wherein the DCI comprises a field for a sounding reference signal (SRS) resource indicator (SRI), and wherein each state of the field is related with an identifier for a power control information;
• determining a transmission power for the uplink shared channel, using the power control information determined based on the field of the DCI;
• and
• transmitting the uplink shared channel to the base station based on the transmission power.