CPC H04W 16/14 (2013.01) [H04W 8/24 (2013.01); H04W 72/23 (2023.01); H04W 74/0808 (2013.01)] | 20 Claims |
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.
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