Method and device for performing LBT process on multiple carriers in wireless access system supporting unlicensed band
First Claim
1. A method for performing an uplink channel access procedure in a wireless access system supporting an unlicensed band and multiple carriers, the method performed by a user equipment (UE) and comprising:
- receiving, from a base station, an uplink grant for scheduling an uplink channel in each of two or more component carriers (CCs), wherein the uplink grant indicates a first uplink channel access procedure for each of the two or more CCs;
randomly selecting a first CC for the first uplink channel access procedure from among the two or more CCs;
performing the first uplink channel access procedure on the selected first CC; and
performing a second uplink channel access procedure on each of remaining CCs of the two or more CCs,wherein the first uplink channel access procedure is a random backoff-based uplink channel access procedure based on a random backoff count, andwherein the second uplink channel access procedure is a carrier sensing-based uplink channel access procedure based on a predetermined time period before an uplink transmission.
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Accused Products
Abstract
The present invention relates to a wireless access system supporting an unlicensed band. According to this disclosure, a method by which a terminal performs LBT in a wireless access system supporting an unlicensed band and multiple carriers can comprise receiving, from a base station, each of uplink grants for scheduling uplink channels on two or more component carriers (CCs); randomly selecting a first CC on which a first LBT is to be performed from among the two or more CCs; performing the first LBT on the selected first CC; and performing a second LBT on the remaining CCs among the two or more CCs, wherein the first LBT can be a random back-off-based LBT for performing a random back-off by a random back-off counter value, and the second LBT can be a channel sensing-based LBT for sensing a channel during a predetermined time interval before uplink transmission.
13 Citations
14 Claims
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1. A method for performing an uplink channel access procedure in a wireless access system supporting an unlicensed band and multiple carriers, the method performed by a user equipment (UE) and comprising:
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receiving, from a base station, an uplink grant for scheduling an uplink channel in each of two or more component carriers (CCs), wherein the uplink grant indicates a first uplink channel access procedure for each of the two or more CCs; randomly selecting a first CC for the first uplink channel access procedure from among the two or more CCs; performing the first uplink channel access procedure on the selected first CC; and performing a second uplink channel access procedure on each of remaining CCs of the two or more CCs, wherein the first uplink channel access procedure is a random backoff-based uplink channel access procedure based on a random backoff count, and wherein the second uplink channel access procedure is a carrier sensing-based uplink channel access procedure based on a predetermined time period before an uplink transmission. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A user equipment (UE) for performing an uplink channel access procedure in a wireless access system supporting an unlicensed band and multiple carriers, the UE comprising:
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a receiver coupled to a processor; and the processor configured to; receive, from a base station, an uplink grant for scheduling an uplink channel in each of two or more component carriers (CCs), wherein the uplink grant indicates a first uplink channel access procedure for each of the two or more CCs, randomly select a first CC for the first uplink channel access procedure from among the two or more CCs, perform the first uplink channel access procedure on the selected first CC, and preform a second uplink channel access procedure on each of remaining CCs of the two or more CCs, wherein the first uplink channel access procedure is a random backoff-based uplink channel access procedure based on a random backoff count, and wherein the second uplink channel access procedure is a carrier sensing-based uplink channel access procedure based on a predetermined time period before an uplink transmission. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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Specification