Method and apparatus for determining channel access procedure in wireless communication system
The present invention relates to a method and a device for a channel access procedure in a wireless communication system. More specifically, the present invention relates to a method for performing a channel access procedure by a base station in a specific direction (or beam) in an unlicensed band. More specifically, the present invention proposes a method for configuring and generating downlink control information by a base station in order to transmit, to a terminal, a result of a channel access procedure performed in a specific direction, and a method for determining the information by the terminal. A method of a terminal in a communication system according to an embodiment of the present disclosure may comprise the steps of: receiving, from a base station, downlink control information (DCI) for scheduling of uplink signal transmission; checking beam-related information which is included in the DCI and indicates a beam for the uplink signal transmission; and performing the uplink signal transmission to the base station without a channel access procedure of the terminal on the basis of the beam indicated by the beam-related information.
1. A method performed by a user equipment (UE) in a communication system, the method comprising:
identifying multiple beams for a Type 1 channel access procedure;
identifying, for each beam, a corresponding value N for the Type 1 channel access procedure, wherein N is an integer value between 0 and a value of contention window (CW); and
performing the Type 1 channel access procedure on each beam independently based on the corresponding value N.
2. The method of claim 1 , wherein the value of N is independently selected for each beam for the Type 1 channel access procedure.
3. The method of claim 1 , wherein the multiple beams for the Type 1 channel access procedure are associated with multiple transmission beams.
4. A method performed by a base station (BS) in a communication system, the method comprising:
identifying multiple beams for a Type 1 channel access procedure;
identifying, for each beam, a corresponding value N for the Type 1 channel access procedure, wherein N is an integer value between 0 and a value of contention window (CW); and
performing the Type 1 channel access procedure on each beam independently based on the corresponding value N.
5. The method of claim 4 , wherein the value of N is independently selected for each beam for the Type 1 channel access procedure.
6. The method of claim 4 , wherein the multiple beams for the Type 1 channel access procedure are associated with multiple transmission beams.
7. A user equipment (UE) in a communication system, the UE comprising:
a transceiver; and
at least one processor configured to:
identify multiple beams for a Type 1 channel access procedure,
identify, for each beam, a corresponding value N for the Type 1 channel access procedure, wherein N is an integer value between 0 and a value of contention window (CW), and
perform the Type 1 channel access procedure on each beam independently based on the corresponding value N.
8. The UE of claim 7 , wherein the value of N is independently selected for each beam for the Type 1 channel access procedure.
9. The UE of claim 7 , wherein the multiple beams for the Type 1 channel access procedure are associated with multiple transmission beams.
10. A base station (BS) in a communication system, the BS comprising:
a transceiver; and
at least one processor configured to:
identify multiple beams for a Type 1 channel access procedure,
identify, for each beam, a corresponding value N for the Type 1 channel access procedure, wherein N is an integer value between 0 and a value of contention window (CW), and
perform the Type 1 channel access procedure on each beam independently based on the corresponding value N.
11. The BS of claim 10 , wherein the value of N is independently selected for each beam for the Type 1 channel access procedure.
12. The BS of claim 10 , wherein the multiple beams for the Type 1 channel access procedure are associated with multiple transmission beams.