Method for performing channel access procedure and apparatus therefor
The present disclosure discloses a method by which a terminal receives a downlink signal in a wireless communication system. In particular, the method receives information related to a listen-before-talk (LBT) based on at least one beam, performs LBT based on the at least one beam on the basis of the information, obtains a channel occupancy time (COT) on the basis of the performing of the LBT, and receives the downlink signal associated with the at least one beam within the COT.
1 . A method comprising:
receiving downlink control information (DCI) including information related to a channel occupancy time (COT) obtained based on a first channel access procedure (CAP);
obtaining the COT based on the DCI;
performing a second CAP within the COT; and
transmitting a configured grant physical uplink shared channel (CG-PUSCH) based on a result of the second CAP sensing that a channel is idle,
wherein the first CAP is based on at least one beam related to a first transmission configuration indicator (TCI) state associated with the DCI,
wherein, based on a second TCI state configured for the CG-PUSCH being the same as the first TCI state, the second CAP is a CAP without random back-off, and
wherein, based on the second TCI state not being the same as the first TCI state, the second CAP is a CAP with the random back-off.
2 . The method of claim 1 ,
wherein, based on the second TCI state being the same as the first TCI state, the second CAP is type 2A CAP or type 2B CAP.
3 . The method of claim 1 , further comprising:
transmitting the CG-PUSCH through the at least one beam within the COT,
wherein configured grant uplink control information (CG-UCI) included in the CG-PUSCH comprises information related to the at least one beam.
4 . A user equipment (UE) comprising:
at least one transceiver;
at least one processor; and
at least one memory operably connected to the at least one processor and configured to store instructions that, when executed, cause the at least one processor to perform operations comprising:
receiving downlink control information (DCI) including information related to a channel occupancy time (COT) obtained based on a first channel access procedure (CAP);
obtaining the COT based on the DCI;
performing a second CAP within the COT; and
transmitting a configured grant physical uplink shared channel (CG-PUSCH) based on a result of the second CAP sensing that a channel is idle,
wherein the first CAP is based on at least one beam related to a first transmission configuration indicator (TCI) state associated with the DCI, and
wherein, based on a second TCI state configured for the CG-PUSCH being the same as the first TCI state, the second CAP is a CAP without random back-off, and
wherein, based on the second TCI state not being the same as the first TCI state, the second CAP is a CAP with the random back-off.
5 . The UE of claim 4 ,
wherein, based on the second TCI state being the same as the first TCI state, the second CAP is type 2A CAP or type 2B CAP.
6 . The UE of claim 4 ,
wherein the operations further comprise transmitting the CG-PUSCH through the at least one beam within the COT, and
wherein configured grant uplink control information (CG-UCI) included in the CG-PUSCH comprises information related to the at least one beam.
7 . An apparatus s comprising:
at least one processor; and
at least one memory operably connected to the at least one processor and configured to store instructions that, when executed, cause the at least one processor to perform operations comprising:
receiving downlink control information (DCI) including information related to a channel occupancy time (COT) obtained based on a first channel access procedure (CAP);
obtaining the COT based on the DCI;
performing a second CAP within the COT; and
transmitting a configured grant physical uplink shared channel (CG-PUSCH) based on a result of the second CAP sensing that a channel is idle,
wherein the first CAP is based on at least one beam related to a first transmission configuration indicator (TCI) state associated with the DCI, and
wherein, based on a second TCI state configured for the CG-PUSCH being the same as the first TCI state, the second CAP is a CAP without random back-off, and
wherein, based on the second TCI state not being the same as the first TCI state, the second CAP is a CAP with the random back-off.
8 . A non-transitory computer-readable storage medium comprising at least one computer program that causes at least one processor to perform operations comprising:
receiving downlink control information (DCI) including information related to a channel occupancy time (COT) obtained based on a first channel access procedure (CAP);
obtaining the COT based on the DCI;
performing a second CAP within the COT; and
transmitting a configured grant physical uplink shared channel (CG-PUSCH) based on a result of the second CAP sensing that a channel is idle,
wherein the first CAP is based on at least one beam related to a first transmission configuration indicator (TCI) state associated with the DCI, and
wherein, based on a second TCI state configured for the CG-PUSCH being the same as the first TCI state, the second CAP is a CAP without random back-off, and
wherein, based on the second TCI state not being the same as the first TCI state, the second CAP is a CAP with the random back-off.