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

A user equipment configured to perform uplink transmission in ultra-reliable low latency communication (URLLC), the user equipment comprising:

• a Radio Frequency (RF) unit;
• and
• a processor functionally connected to the RF unit,
• wherein the processor is configured to control the user equipment to:
• receive, from a base station, first configuration information for dynamic grant-free uplink transmission, wherein the first configuration information is configured separately from second configuration information for dynamic grant-based uplink transmission to the user equipment;
• and
• transmit, to the base station, uplink data based on the first configuration information,
• wherein the dynamic grant-free uplink transmission is semi-statically configured and the dynamic grant-based uplink transmission is dynamically configured, and
• wherein the first configuration information is received through a higher layer signaling, and comprises (i) information related to a resource for the dynamic grant-free uplink transmission, (ii) information related to precoding and a number of layers, and (iii) information related to initialization of a reference signal sequence generator for the dynamic grant-free uplink transmission.