US 11,706,631 B2
User equipment and method for FBE operation in unlicensed band
Hai-Han Wang, Taipei (TW); Heng-Li Chin, Taipei (TW); and Chia-Hung Wei, Taipei (TW)
Assigned to FG Innovation Company Limited, Tuen Mun (HK)
Filed by FG Innovation Company Limited, Tuen Mun (HK)
Filed on May 17, 2021, as Appl. No. 17/321,810.
Claims priority of provisional application 63/025,888, filed on May 15, 2020.
Prior Publication US 2021/0360421 A1, Nov. 18, 2021
Int. Cl. H04W 16/14 (2009.01); H04W 74/08 (2009.01); H04W 8/24 (2009.01); H04W 72/23 (2023.01)
CPC H04W 16/14 (2013.01) [H04W 8/24 (2013.01); H04W 72/23 (2023.01); H04W 74/0808 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A user equipment (UE) for frame-based equipment (FBE) operation in an unlicensed band, the UE comprising:
at least one processor; and
at least one memory coupled to the at least one processor, wherein the at least one memory stores computer-executable instructions that, when executed by the processor, cause the UE to:
receive, from a base station (BS), a first parameter indicating a first periodicity of a first plurality of fixed frame periods (FFPs) used when the BS acts as an initiating device for the FBE operation in a cell;
receive, from the BS, a first Radio Resource Control (RRC) configuration, the first RRC configuration including a second parameter indicating a second periodicity of a second plurality of FFPs used when the UE acts as the initiating device for the FBE operation in the cell;
receive, from the BS, an indication for enabling the UE to act as the initiating device for the FBE operation for a first one of the second plurality of FFPs in the cell;
perform a clear channel assessment (CCA) on a channel of the unlicensed band immediately before a start of the first one of the second plurality of FFPs in response to receiving the indication; and
perform an uplink (UL) transmission on the channel to initiate the first one of the second plurality of FFPs after determining that the channel is clear, wherein:
the UL transmission ends before an idle period of the first one of the second plurality of FFPs determined based on the second parameter,
in a case that the UL transmission is scheduled by a UL grant, the indication is indicated by a ChannelAccess-CPext-CAPC field in a Downlink Control Information (DCI) format carrying the UL grant, and the DCI format is received in one of the first plurality of FFPs.