Method and apparatus for transmitting and receiving signal in wireless communication system
The present disclosure discloses a method of a user equipment (UE) in a wireless communication system. Especially, the method comprising: receiving system information; performing a channel access procedure (CAP) based on one of a first channel access mode and a second channel access mode different from the first channel access mode; and transmitting an uplink signal based on a result of the CAP, and wherein, based on the system information including information related to a channel access mode, the CAP is performed based on one of the first channel access mode and the second channel access mode based on the information, and wherein, based on the system information not including the information related to the channel access mode, the CAP is performed based on the first channel access mode.
1. A method of a user equipment (UE) in a wireless communication system, the method comprising:
receiving, from a base station (BS), system information,
wherein:
when (i) the system information includes information related to a first channel access mode or (ii) the system information does not include information related to any channel access mode:
performing a first channel access procedure (CAP) based on the first channel access mode; and
performing, to the BS, a configured uplink (UL) transmission based on a first channel corresponding to the first CAP being sensed to be idle; and
when (i) the system information includes information related to a second channel access mode different from the first channel access mode and (ii) the UE determines that the BS has not initiated a channel occupancy in a frame based first period of the BS:
performing a second CAP in a frame based second period of the UE based on the second channel access mode; and
performing, to the BS, the configured UL transmission in the frame based second period based on a second channel corresponding to the second CAP being sensed to be idle.
2. The method according to claim 1 , wherein the first channel access mode is based on a random backoff-based CAP.
3. The method according to claim 1 , wherein the second channel access mode is a mode in which the CAP and the configured UL transmission are performed in the frame based second period, and
wherein the frame based second period is repeated, periodically.
4. The method according to claim 1 , wherein the configured UL transmission is performed in an unlicensed band.
5. A user equipment (UE) configured to operate in a wireless communication system, the UE comprising:
at least one transceiver;
at least one processor; and
at least one computer memory operatively coupled to the at least one transceiver and at least one processor and, when executed, causing the at least one transceiver and at least one processor to perform operations comprising:
receiving, through the at least one transceiver from a base station (BS), system information,
wherein:
when (i) the system information includes information related to a first channel access mode or (ii) the system information does not include information related to any channel access mode:
performing a first channel access procedure (CAP) based on the first channel access mode; and
performing, through the at least one transceiver to the BS, a configured uplink (UL) transmission based on a first channel corresponding to the first CAP being sensed to be idle; and
when (i) the system information includes information related to a second channel access mode different from the first channel access mode and (ii) the UE determines that the BS has not initiated a channel occupancy in a frame based first period of the BS:
performing a second CAP in a frame based second period of the UE based on the second channel access mode; and
performing, through the at least one transceiver to the BS, the configured UL transmission in the frame based second period based on a second channel corresponding to the second CAP being sensed to be idle.
6. The UE according to claim 5 , wherein the first channel access mode is based on a random backoff-based CAP.
7. The UE according to claim 5 , wherein the second channel access mode is a mode in which the CAP and the configured UL transmission are performed in the frame based second period, and
wherein the frame based second period is repeated, periodically.
8. The UE according to claim 5 , wherein the UE includes an autonomous driving vehicle communicable with at least one of a network or another autonomous driving vehicle other than the UE.
9. An apparatus for a user equipment (UE), the apparatus comprising:
at least one processor; and
at least one computer memory operatively coupled to the at least one processor and, when executed, causing the at least one processor to perform operations comprising:
receiving, from a base station (BS), system information,
wherein:
when (i) the system information includes information related to a first channel access mode or (ii) the system information does not include information related to a any channel access mode:
performing a first channel access procedure (CAP) based on the first channel access mode; and
performing, to the BS, a configured uplink (UL) transmission based on a first channel corresponding to the first CAP being sensed to be idle; and
when (i) the system information includes information related to a second channel access mode different from the first channel access mode and (ii) the UE determines that the BS has not initiated a channel occupancy in a frame based first period of the BS:
performing a second CAP in a frame based second period of the UE based on the second channel access mode; and
performing, to the BS, the configured UL transmission in the frame based second period based on a second channel corresponding to the second CAP being sensed to be idle.
10. The method according to claim 1 , wherein the UE determines that the BS has not initiated the channel occupancy in the frame based first period based on a downlink (DL) transmission not being detected in the frame based first period.