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

Claim 3:
4. A method for a base station which communicates with a user equipment (UE), the method comprising:
sending first radio resource control (RRC) configuration information, the first RRC configuration information indicating that Physical Downlink Shared Channel Hybrid Automatic Repeat Request-Acknowledgment (PDSCH HARQ-ACK) codebook is semi static;
sending second RRC configuration information, the second RRC configuration information indicating that a maximum number of codewords scheduled by DCI is two;
after a channel access procedure, transmitting, to the UE, a PDSCH which contains only a first transport block; and
receiving, 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 first transport block of the PDSCH;
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.