US 12,302,389 B2
Method and device for detecting uplink LBT failure in wireless communication system using unlicensed band
Jaehyuk Jang, Gyeonggi-do (KR); and Anil Agiwal, Gyeonggi-do (KR)
Assigned to Samsung Electronics Co., Ltd, (KR)
Filed by Samsung Electronics Co., Ltd., Gyeonggi-do (KR)
Filed on Aug. 14, 2023, as Appl. No. 18/449,317.
Application 18/449,317 is a continuation of application No. 17/549,103, filed on Dec. 13, 2021, granted, now 11,729,827.
Application 17/549,103 is a continuation of application No. 16/832,093, filed on Mar. 27, 2020, granted, now 11,284,433, issued on Mar. 22, 2022.
Claims priority of application No. 10-2019-0035577 (KR), filed on Mar. 28, 2019.
Prior Publication US 2023/0389072 A1, Nov. 30, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. H04W 74/08 (2024.01); H04W 16/14 (2009.01); H04W 24/08 (2009.01); H04W 72/21 (2023.01); H04W 72/53 (2023.01); H04W 74/0808 (2024.01); H04W 74/0833 (2024.01)
CPC H04W 74/0808 (2013.01) [H04W 16/14 (2013.01); H04W 24/08 (2013.01); H04W 72/21 (2023.01); H04W 72/53 (2023.01); H04W 74/0833 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A method performed by a terminal in a wireless communication system, the method comprising:
receiving configuration information related to a listen before talk (LBT) failure, the configuration information including first information on a maximum count value for the LBT failure and second information on a timer for the LBT failure;
performing at least one LBT procedure for a first bandwidth part (BWP) among a plurality of BWPs on a cell;
identifying that the LBT failure is triggered for the first BWP on the cell based on the received configuration information;
determining whether the cell is a primary cell and the LBT failure is triggered for all BWPs among the plurality of BWPs configured with physical random access channel (PRACH) resources on the cell; and
in response to determining that the cell is the primary cell and the LBT failure is triggered for all of the BWPs, indicating, by a medium access control (MAC) entity of the terminal, the LBT failure to an upper layer.