Patent ID: 11863326
Assignee: SHARP KABUSHIKI KAISHA
Field: Digital communication (Electrical engineering)
Classification: CPC H | IPC H

Claim 1:
2. A base station which communicates with a user equipment (UE), the base station comprising:
higher layer processing circuitry configured to send radio resource control (RRC) configuration information, the RRC configuration information indicating that Physical Downlink Shared Channel Hybrid Automatic Repeat Request-Acknowledgment (PDSCH HARQ-ACK) codebook is semi static;
transmitting circuitry configured to, after a channel access procedure, transmit, to the UE, a PDSCH in a first slot and does not transmit, to the UE, any PDSCH in a second slot; and
receiving circuitry configured to receive, from the UE, a HARQ-ACK feedback including at least a first HARQ-ACK information bit and a second HARQ-ACK information bit, the first HARQ-ACK information bit corresponding to the PDSCH in the first slot, the second HARQ-ACK information bit corresponding to a PDSCH in the second slot;
wherein
the second HARQ-ACK information bit is set to Negative ACK (NACK), and
a contention window for a channel access procedure is adjusted using the HARQ-ACK feedback, wherein the second HARQ-ACK information bit is ignored.