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 comprising:
determining, by a user equipment (UE), whether an uplink (UL) transmission is associated with a channel occupancy that is initiated by a base station (BS) or the UE,
wherein the UE determines the channel occupancy is initiated by the BS based on a DL transmission from the BS being detected in a first period, and
wherein the UE determines the channel occupancy is initiated by the UE based on the DL transmission not being detected in the first period, and
wherein the first period is a duration for the BS including a first channel occupancy time and a first idle duration;
based on a determination that the channel occupancy is initiated by the BS in the first period, performing the UL transmission to the BS after the DL transmission in the first period, wherein the UL transmission ends before start of the first idle duration; and
based on a determination that the channel occupancy is initiated by the UE, performing the UL transmission to the BS in a second period based on that the first period is not occupied by the BS, wherein the second period is a duration for the UE including a second channel occupancy time and a second idle duration, and the UL transmission ends before start of the second idle duration.
2 . The method according to claim 1 , wherein the UL transmission is performed in an unlicensed band.
3 . A user equipment (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 the at least one processor and configured to store instructions for enabling the at least one transceiver and the at least one processor to perform operations comprising:
determining whether an uplink (UL) transmission is associated with a channel occupancy that is initiated by a base station (BS) or the UE,
wherein the UE determines the channel occupancy is initiated by the BS based on a DL transmission from the BS being detected in a first period, and
wherein the UE determines the channel occupancy is initiated by the UE based on the DL transmission not being detected in the first period, and
wherein the first period is a duration for the BS including a first channel occupancy time and a first idle duration;
based on a determination that the channel occupancy is initiated by the BS in the first period, performing the UL transmission to the BS after the DL transmission in the first period, wherein the UL transmission ends before start of the first idle duration; and
based on a determination that the channel occupancy is initiated by the UE, performing the UL transmission to the BS in a second period based on that the first period is not occupied by the BS, wherein the second period is a duration for the UE including a second channel occupancy time and a second idle duration, and the UL transmission ends before start of the second idle duration.
4 . The UE according to claim 3 , wherein the UL transmission is performed in an unlicensed band.
5 . The UE according to claim 3 , 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.
6 . A non-transitory computer-readable storage medium storing instructions executed by at least one processor of a user equipment (UE) to perform operations,
wherein the operations comprise:
determining whether an uplink (UL) transmission is associated with a channel occupancy that is initiated by a base station (BS) or the UE,
wherein the UE determines the channel occupancy is initiated by the BS based on a DL transmission from the BS being detected in a first period, and
wherein the UE determines the channel occupancy is initiated by the UE based on the DL transmission not being detected in the first period, and
wherein the first period is a duration for the BS including a first channel occupancy time and a first idle duration;
based on a determination that the channel occupancy is initiated by the BS in the first period, performing the UL transmission to the BS after the DL transmission in the first period, wherein the UL transmission ends before start of the first idle duration; and
based on a determination that the channel occupancy is initiated by the UE, performing the UL transmission to the BS in a second period based on that the first period is not occupied by the BS, wherein the second period is a duration for the UE including a second channel occupancy time and a second idle duration, and the UL transmission ends before start of the second idle duration.
7 . The non-transitory computer-readable storage medium according to claim 6 , wherein the UL transmission is performed in an unlicensed band.