US 12,082,244 B2
Dynamic physical downlink control channel (PDCCH) monitoring mode switching, configuration, and control
Jing Sun, San Diego, CA (US); Xiaoxia Zhang, San Diego, CA (US); and Kapil Bhattad, Bangalore (IN)
Assigned to QUALCOMM Incorporated, San Diego, CA (US)
Filed by QUALCOMM Incorporated, San Diego, CA (US)
Filed on Feb. 27, 2020, as Appl. No. 16/803,869.
Claims priority of application No. 201941012236 (IN), filed on Mar. 28, 2019.
Prior Publication US 2020/0314898 A1, Oct. 1, 2020
Int. Cl. H04W 72/0446 (2023.01); H04L 1/1812 (2023.01); H04L 5/00 (2006.01); H04W 72/23 (2023.01); H04W 74/08 (2009.01); H04W 74/0808 (2024.01); H04W 76/27 (2018.01)
CPC H04W 74/0808 (2013.01) [H04L 1/1819 (2013.01); H04L 5/0055 (2013.01); H04W 72/0446 (2013.01); H04W 72/23 (2023.01); H04W 76/27 (2018.02)] 30 Claims
OG exemplary drawing
 
1. A method of wireless communication in an unlicensed frequency band at a user equipment (UE), the method comprising:
receiving a configuration indicating a first group of two or more physical downlink control channel (PDCCH) search spaces and a second group of one or more PDCCH search spaces, wherein at least one of the first group or the second group includes at least one PDCCH search space not included in an other of the first group or the second group, and wherein at least one of the first group or the second group includes one or more PDCCH search spaces within a channel occupancy time (COT) of the unlicensed frequency band and at least another one of the of the first group or the second group includes one or more PDCCH search spaces outside the COT;
switching from PDCCH monitoring in the first group to PDCCH monitoring in the second group in response to receiving a first group common-physical downlink control channel (GC-PDCCH) downlink control information (DCI) message in a first PDCCH search space of the first group of two or more PDCCH search spaces, the first GC-PDCCH DCI message indicating a beginning of a COT, wherein the first group is associated with a first monitoring periodicity and the second group is associated with a second monitoring periodicity different from the first monitoring periodicity;
upon switching from PDCCH monitoring in the first group to PDCCH monitoring in the second group, activating a timer for a predetermined period of time; and
when a grant is not received within the predetermined period of time, switching from PDCCH monitoring in the second group to PDCCH monitoring in the first group upon expiration of the predetermined period of time.