Method and device for transmitting and receiving signals in wireless communication system

A method of transmitting or receiving signals by a base station (BS) in a wireless communication system, the method comprising:

• transmitting, to a first user equipment (UE) and a second UE, information about a resource for uplink (UL) control information transmission and multiple access (MA) signature configuration;
• determining whether UL control information and UL data received from the UEs have been multiplexed in non-orthogonal multiple access (NOMA);
• and
• decoding at least one of the UL control information and the UL data in signals received from the UEs, based on a result of the determining,
• wherein the UL control information and the UL data received are multiplexed based on a priority of information included in the UL control information, and
• wherein the BS determines that the first UE has multiplexed the UL control information with the UL data in the resource as the second UE has not multiplexed UL control information of the second UE with the UL data of the second UE in the resource.

A first user equipment (UE) for transmitting or receiving signals in a wireless communication system, the UE comprising:

• a transceiver;
• a memory storing one or more instructions;
• and
• at least one processor configured to execute the one or more instructions stored in the memory,
• wherein the at least one processor is configured to execute the one or more instructions to:
• control the transceiver to receive information about a resource for uplink (UL) control information transmission and MA signature configuration,
• determine based on the resource for UL control information transmission whether the resource allocated for the UL control information transmission overlaps a resource allocated for UL data transmission,
• determine whether to perform transmission in orthogonal multiple access (OMA) or non-orthogonal multiple access (NOMA) based on the received information when it is determined that the resource allocated for the UL control information transmission overlaps the resource allocated for the UL data transmission in time;
• determine whether to multiplex the UL control information based on a priority of information included in the UL control information, if it is determined to perform transmission in NOMA, and
• if it is determined to multiplex the UL control information, control the transceiver to multiplex the UL control information with the UL data based on the information about the MA signature configuration and transmit a result of the multiplexing, based on the determining, as a second UE transmits UL control information of the second UE on the resource for the UL control information of the first UE without multiplexing the UL control information of the second UE with the UL data of the second UE.

A base station (BS) for transmitting or receiving signals in a wireless communication system, the BS comprising:

• a transceiver;
• a memory storing one or more instructions;
• and
• at least one processor configured to execute the one or more instructions stored in the memory,
• wherein the at least one processor is configured to execute the one or more instructions to:
• control the transceiver to transmit, to a first user equipment (UE) and a second UE, information about a resource for uplink (UL) control information transmission and multiple access (MA) signature configuration,
• determine whether UL control information and uplink data received from the UEs have been multiplexed in non-orthogonal multiple access (NOMA), and
• decode at least one of the UL control information and the UL data in signals received from the UEs, based on a result of the determining,
• wherein the UL control information and the UL data received are multiplexed based on a priority of information included in the UL control information, and
• wherein the BS determines that the first UE has multiplexed the UL control information with the UL data in the resource as the second UE has not multiplexed UL control information of the second UE with the UL data of the second UE in the resource.