US 12,446,067 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. 17/913,861
Filed by Purplevine Innovation Company Limited, Hong Kong (CN)
PCT Filed Dec. 21, 2021, PCT No. PCT/CN2021/140169
§ 371(c)(1), (2) Date Sep. 23, 2022,
PCT Pub. No. WO2022/135416, PCT Pub. Date Jun. 30, 2022.
Claims priority of provisional application 63/128,500, filed on Dec. 21, 2020.
Prior Publication US 2023/0354409 A1, Nov. 2, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. H04W 74/0808 (2024.01); H04W 72/23 (2023.01); H04W 72/232 (2023.01); H04W 74/00 (2009.01); 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)] 61 Claims
OG exemplary drawing
 
1. A channel access method in an unlicensed band for execution by a user equipment (UE), comprising:
receiving configuration information transmitted from a base station;
receiving downlink (DL) information transmitted from the base station, wherein the downlink (DL) information includes COT-initiator information, the COT-initiator information is indicated by a bit field with a specific code point for semi-static channel access, wherein the bit field indicates a combination of more than one field;
determining whether to initiate a channel occupancy time (COT) in a fixed frame period (FFP) according to a set of FFP parameters associated with the UE based on at least one condition in the configuration information and at least one condition in the DL information;
initiating a 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 an UL burst to the base station 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.