US 12,408,193 B2
Method and apparatus for LBT failure detection
Hung-Chen Chen, Hsinchu (TW); Chie-Ming Chou, Hsinchu (TW); Chia-Hung Wei, Hsinchu (TW); and Mei-Ju Shih, Hsinchu (TW)
Assigned to Hannibal IP LLC
Filed by Hannibal IP LLC, Frisco, TX (US)
Filed on Sep. 21, 2023, as Appl. No. 18/370,986.
Application 18/370,986 is a continuation of application No. 17/592,664, filed on Feb. 4, 2022, granted, now 11,805,544.
Application 17/592,664 is a continuation of application No. 16/737,787, filed on Jan. 8, 2020, granted, now 11,272,535, issued on Mar. 8, 2022.
Claims priority of provisional application 62/790,099, filed on Jan. 9, 2019.
Prior Publication US 2024/0090019 A1, Mar. 14, 2024
Int. Cl. H04W 74/00 (2009.01); H04W 36/00 (2009.01); H04W 36/30 (2009.01); H04W 36/36 (2009.01); H04W 72/044 (2023.01); H04W 74/0808 (2024.01)
CPC H04W 74/002 (2013.01) [H04W 36/0058 (2018.08); H04W 36/00837 (2018.08); H04W 36/305 (2018.08); H04W 72/044 (2013.01); H04W 74/0808 (2013.01); H04W 36/00698 (2023.05); H04W 36/362 (2023.05)] 18 Claims
OG exemplary drawing
 
1. A user equipment (UE) comprising:
one or more non-transitory computer-readable media having computer-executable instructions embodied thereon; and
at least one processor coupled to the one or more non-transitory computer-readable media, the computer-executable instructions causing the UE to:
receive, by a Medium Access Control (MAC) entity of the UE, a Listen-Before-Talk (LBT) failure indication from a lower layer in response to an unsuccessful uplink (UL) transmission attempt;
identify the unsuccessful UL transmission attempt associated with the received LBT failure indication based on a timing of resources used by the unsuccessful UL transmission attempt
increase an LBT failure counter by one when the MAC entity receives the LBT failure indication;
determine an LBT failure event has occurred when the LBT failure counter is greater than or equal to a threshold;
indicate an LBT failure problem to an upper layer in response to determining an LBT failure event has occurred; and
reset the LBT failure counter in response to indicating the LBT failure problem to the upper layer.