US 12,446,068 B2
Channel access method, user equipment, and base station
Chun-Che Chien, Hong Kong (CN)
Assigned to Purplevine Innovation Company Limited, Hong Kong (CN)
Appl. No. 17/915,504
Filed by Purplevine Innovation Company Limited, Hong Kong (CN)
PCT Filed Dec. 21, 2021, PCT No. PCT/CN2021/140165
§ 371(c)(1), (2) Date Sep. 29, 2022,
PCT Pub. No. WO2022/135415, PCT Pub. Date Jun. 30, 2022.
Claims priority of provisional application 63/128,500, filed on Dec. 21, 2020.
Prior Publication US 2023/0146487 A1, May 11, 2023
Int. Cl. H04W 4/00 (2018.01); H04W 72/23 (2023.01); H04W 72/232 (2023.01); H04W 74/00 (2009.01); H04W 74/0808 (2024.01); H04W 74/0833 (2024.01)
CPC H04W 74/0808 (2013.01) [H04W 72/23 (2023.01); H04W 72/232 (2023.01); H04W 74/006 (2013.01); H04W 74/085 (2013.01)] 55 Claims
OG exemplary drawing
 
1. A channel access method in unlicensed band for execution by a user equipment (UE), comprising:
receiving configuration information and scheduling information from a base station;
detecting transmission of downlink (DL) information in a fixed frame period (FFP) according to a set of FFP parameters associated with the base station;
determining whether to initiate a channel occupancy time (COT) in an FFP according to a set of FFP parameters associated with the UE based on at least one condition in the configuration information, at least one condition in the scheduling information, and a detection result of detecting the transmission of the DL information;
initiating the COT in the FFP according to the set of FFP parameters associated with the UE after a successful listen-before-talk (LBT) upon affirming the determining as to whether to initiate the COT;
transmitting a UL burst in one or more symbols that are valid in a region of the FFP according to the set of FFP parameters associated with the UE; and
receiving a DL burst from the base station in one or more symbols that are valid in the region of the FFP according to the set of FFP parameters associated with the UE when the UE shares with the base station the COT initiated by the UE.