Method for transmitting and receiving uplink signal in wireless communication system supporting unlicensed band, and apparatus supporting same

A user equipment (UE) of performing a Channel Access Procedure (CAP) for a Physical Uplink Shared Channel (PUSCH) in a wireless communication system, the UE comprising:

• at least one transceiver;
• at least one processor;
• and
• at least one computer memory operably connectable to the at least one processor and storing instructions that, when executed, cause the at least one processor to perform operations comprising:
• performing a CAP based on a first channel access priority class value;
• receiving, through the at least one transceiver from a base station (B S), Downlink Control Information (DCI) including (i) first information for scheduling the PUSCH and (ii) second information related to a second channel access priority class value;
• based on the first channel access priority class value being same or larger than the second channel access priority class value:
• performing the CAP based on the first channel access priority class value;
• and
• transmitting, through the at least one transceiver, the PUSCH based on the first information;
• based on the first channel access priority class value being smaller than the second channel access priority class value:
• terminating the CAP.

An apparatus of performing a Channel Access Procedure (CAP) for a Physical Uplink Shared Channel (PUSCH) 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, when executed, cause the at least one processor to perform operations comprising:
• performing a CAP based on a first channel access priority class value;
• receiving, from a base station (BS), Downlink Control Information (DCI) including (i) first information for scheduling the PUSCH and (ii) second information related to a second channel access priority class value;
• based on the first channel access priority class value being same or larger than the second channel access priority class value:
• performing the CAP based on the first channel access priority class value;
• and
• transmitting the PUSCH based on the first information;
• based on the first channel access priority class value being smaller than the second channel access priority class value:
• terminating the CAP.