Method and apparatus for transmitting and receiving data using non-orthogonal multiple access in wireless communication system

A first user equipment (UE) configured to transmit and receive data using a non-orthogonal multiple access (NOMA) in a wireless communication system, the first UE comprising:

• a radio frequency (RF) unit;
• and
• a processor functionally connected to the RF unit,
• wherein the processor is configured:
• to receive first downlink control information (DCI) including information related to physical downlink shared channel (PDSCH) scheduling of the first UE from a base station;
• to receive second DCI including information related to PDSCH cancellation of a second UE from the base station;
• to receive a superposition signal from the base station,
• wherein the superposition signal includes a PDSCH of the first UE and a PDSCH of the second UE;
• and
• to decode the PDSCH of the first UE by cancelling the PDSCH of the second UE from the superposition signal based on the received second DCI,
• wherein the first DCI and the second DCI are distinguished through a specific indicator, and
• wherein each of the first DCI and the second DCI includes a field for the specific indicator.