	US 12,232,165 B2
	Contention window adjustment method and device, storage medium and electronic device
Xincai Li, Guangdong (CN); and Yajun Zhao, Guangdong (CN)
Assigned to ZTE Corporation, Guangdong (CN)
Filed by ZTE Corporation, Guangdong (CN)
Filed on Mar. 26, 2021, as Appl. No. 17/214,152.
Application 17/214,152 is a continuation of application No. PCT/CN2019/106681, filed on Sep. 19, 2019.
Claims priority of application No. 201811134486.2 (CN), filed on Sep. 27, 2018.
Prior Publication US 2021/0219337 A1, Jul. 15, 2021
Int. Cl. H04W 74/00 (2009.01); H04L 1/1812 (2023.01); H04L 1/1867 (2023.01); H04W 72/0453 (2023.01); H04W 74/0816 (2024.01)

CPC H04W 74/002 (2013.01) [H04L 1/1819 (2013.01); H04L 1/1896 (2013.01); H04W 72/0453 (2013.01); H04W 74/0816 (2013.01)]

6 Claims

1. A contention window adjustment method comprising:

receiving, by a user equipment (UE), indication information sent by a base station, wherein the indication information is configured for indicating results of demodulating transmitted data by the base station in a hybrid automatic repeat request (“HARQ”) processes corresponding to a reference time domain resource when channel access is performed by the base station at a first moment,

wherein the indication information comprises downlink control information of an uplink (“UL”) grant or downlink feedback information (“DFI”); and

adjusting, by the UE, a size of a contention window corresponding to a second moment according to the indication information, wherein the first moment is earlier than the second moment,

wherein the adjusting the size of the contention window further comprises:

in response to determining that the DFI in the indication information indicates an acknowledgement (“ACK”), corresponding to at least one HARQ process of the HARQ processes corresponding to the reference time domain resource, using a minimum value of the contention window within a value range corresponding to an access level corresponding to channel access performed at the second moment as a value of the contention window corresponding to the second moment;

in response to determining that the DFI in the indication information indicates a negative acknowledgement (“NACK”), increasing, within a corresponding value range, a size of a content window before adjustment at the second moment corresponding to an access level corresponding to channel access performed at the second moment, and using a value of the increased contention window as a value of the contention window corresponding to the second moment; or

in response to determining that the UE received no uplink grant (“UL”) grant, information and/or DFI within a contention window timer, using a value of a content window before adjustment at the second moment corresponding to an access level corresponding to channel access performed at the second moment as a value of the contention window for the channel access at the second moment.