	US 12,114,353 B2
	Category 4 (CAT4) listen-before-transmit (LBT) operations for wireless communications
Jing Sun, San Diego, CA (US); Vinay Chande, San Diego, CA (US); Arumugam Chendamarai Kannan, San Diego, CA (US); Xiaoxia Zhang, San Diego, CA (US); and Aleksandar Damnjanovic, Del Mar, CA (US)
Assigned to QUALCOMM Incorporated, San Diego, CA (US)
Filed by QUALCOMM Incorporated, San Diego, CA (US)
Filed on Oct. 4, 2021, as Appl. No. 17/449,870.
Claims priority of provisional application 63/087,767, filed on Oct. 5, 2020.
Claims priority of provisional application 63/087,770, filed on Oct. 5, 2020.
Prior Publication US 2022/0110158 A1, Apr. 7, 2022
Int. Cl. H04W 74/0808 (2024.01); H04W 24/08 (2009.01); H04W 24/10 (2009.01); H04W 72/044 (2023.01); H04W 74/00 (2009.01); H04W 74/0816 (2024.01)

CPC H04W 74/0808 (2013.01) [H04W 24/08 (2013.01); H04W 24/10 (2013.01); H04W 72/0473 (2013.01); H04W 74/002 (2013.01); H04W 74/0816 (2013.01)]

23 Claims

8. An apparatus for wireless communication, the apparatus comprising:

a memory; and

one or more processors coupled to the memory and configured to:

receive a category two (Cat2) configuration message indicating whether Cat2 listen-before-talk (LBT) operations are enabled or disabled for the apparatus;

in accordance with the Cat2 configuration message indicating that the Cat2 LBT operations are disabled for the apparatus, determine a value of a counter associated with a category four (Cat4) LBT operation;

after determining the value of the counter and during a deferral interval associated with the Cat4 LBT operation, perform a first measurement of a first duration to determine a first energy value;

based on the first energy value and during a contention interval associated with the Cat4 LBT operation following the deferral interval, perform a second measurement of a second duration to determine a second energy value, the second duration different than the first duration; and

determine whether to adjust the value of the counter based on the second energy value.