Patent ID: 11956822
Assignee: INTERDIGITAL PATENT HOLDINGS, INC.
Field: Digital communication (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A wireless transmit/receive unit (WTRU), comprising:
a processor configured to:
determine a maximum number of listen before talk (LBT) failures value;
perform a plurality of LBT procedures associated with a first bandwidth part (BWP) of a serving cell;
determine that a number of LBT failures corresponding to the maximum number of LBT failures value has been detected for the first BWP of the serving cell;
select a second BWP of the serving cell based on the determination that the number of LBT failures corresponding to the maximum number of LBT failures value has been detected for the first BWP of the serving cell, wherein the second BWP of the serving cell is selected based on a channel availability associated with the second BWP;
perform a LBT procedure associated with the second BWP of the serving cell;
determine that the LBT procedure associated with the second BWP of the serving cell is successful; and
perform a random access procedure associated with the second BWP of the serving cell, wherein the processor being configured to perform the random access procedure comprises the processor being configured to:
select a preamble associated with the second BWP; and
transmit the selected preamble to a base station, wherein an explicit indication is sent via the second BWP that indicates that the number of LBT failures corresponding to the maximum number of LBT failures value has been detected.