Method of transmitting uplink signal from user equipment in a wireless communication system supporting unlicensed band and apparatus supporting the same

A user equipment (UE) configured to operate 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, when executed by the at least one processor, perform operations comprising:
• performing, through the transceiver, an autonomous uplink (AUL) transmission starting before time unit n using a channel access procedure (CAP) on a unlicensed band, wherein n is an integer;
• receiving, through the transceiver, a UL grant for a scheduled uplink (SUL) transmission to begin at the time unit n on the unlicensed band;
• based on a sum of a duration of the AUL transmission and a duration of the SUL transmission exceeds a maximum channel occupancy time (MCOT) for the AUL transmission:
• terminating the AUL transmission such that a time gap remains before the time unit n at which the SUL transmission is scheduled to start;
• and
• performing, through the transceiver, the SUL transmission starting from the time unit n on the unlicensed band.

An apparatus configured to control a user equipment (UE) to operate in a wireless communication system, the apparatus comprising:

• at least one processor;
• and
• at least one memory operably connectable to the at least one processor and storing instructions that, when executed by the at least one processor, cause the UE to perform operations comprising:
• performing an autonomous uplink (AUL) transmission starting before time unit n using a channel access procedure (CAP) on a unlicensed band, wherein n is an integer;
• receiving a UL grant for a scheduled uplink (SUL) transmission to begin at the time unit n on the unlicensed band;
• based on a sum of a duration of the AUL transmission and a duration of the SUL transmission exceeds a maximum channel occupancy time (MCOT) for the AUL transmission:
• terminating the AUL transmission such that a time gap remains before the time unit n at which the SUL transmission is scheduled to start;
• and
• performing the SUL transmission starting from the time unit n on the unlicensed band.

A computer readable storage medium storing at least one computer program comprising instructions that, when executed by at least one processor, cause the at least one processor to perform operations, the operations comprising:

• performing an autonomous uplink (AUL) transmission starting before time unit n using a channel access procedure (CAP) on a unlicensed band, wherein n is an integer;
• receiving a UL grant for a scheduled uplink (SUL) transmission to begin at the time unit n on the unlicensed band;
• based on a sum of a duration of the AUL transmission and a duration of the SUL transmission exceeds a maximum channel occupancy time (MCOT) for the AUL transmission:
• terminating the AUL transmission such that a time gap remains before the time unit n at which the SUL transmission is scheduled to start;
• and
• performing the SUL transmission starting from the time unit n on the unlicensed band.