US 12,256,430 B2
Apparatus and method of wireless communication
Cong Shi, Dongguan (CN); and Haitao Li, Dongguan (CN)
Assigned to GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORP., LTD., Dongguan (CN)
Filed by GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORP., LTD., Dongguan (CN)
Filed on Dec. 17, 2021, as Appl. No. 17/554,140.
Application 17/554,140 is a continuation of application No. PCT/CN2020/129858, filed on Nov. 18, 2020.
Claims priority of provisional application 62/937,255, filed on Nov. 18, 2019.
Prior Publication US 2022/0110159 A1, Apr. 7, 2022
Int. Cl. H04W 74/08 (2024.01); H04W 72/04 (2023.01); H04W 72/044 (2023.01); H04W 74/0816 (2024.01); H04W 76/19 (2018.01); H04W 80/02 (2009.01)
CPC H04W 74/0816 (2013.01) [H04W 72/044 (2013.01); H04W 74/0866 (2013.01); H04W 76/19 (2018.02); H04W 80/02 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A wireless communication method by a user equipment (UE), comprising:
being configured by a base station with a listen before talk (LBT) failure recovery procedure;
detecting an LBT failure per uplink (UL) bandwidth part (BWP); and
triggering an UL LBT failure medium access control (MAC) control element (CE) for one or more serving cells configured to trigger the LBT failure;
wherein a format of the UL LBT failure MAC CE comprises a bitmap with a size equal to a maximum number of serving cells for a carrier group (CG);
wherein in the bitmap of the format, a corresponding bit field of a corresponding serving cell is set to a first value if the corresponding serving cell has a consistent LBT failure; and the corresponding bit field of the corresponding serving cell is set to a second value if the corresponding serving cell does not have the consistent LBT failure;
wherein the method further comprises transmitting, to the base station, a MAC CE configured to trigger the UL LBT failure MAC CE;
wherein if the MAC CE has been transmitted on the one or more serving cells, the UE cancels one or more triggered MAC CEs;
wherein the LBT failure comprises the consistent LBT failure, wherein if the UE declares the consistent LBT failure for an active UL BWP and if the one or more serving cells comprises one or more secondary cells (SCells), the UE indicates a multiplexing and assembly entity to include the UL LBT failure MAC CE in a subsequent uplink transmission, and wherein the uplink transmission does not happen on the one or more SCells which have declared the consistent LBT failure.