Scheduling and hybrid automatic repeat request operation and codebook design for new radio carrier aggregation

An apparatus for a base station, the apparatus including a radio frequency (RF) circuitry interface, and processing circuitry coupled to the RF interface and configured to:

• encode control information for transmission to a user equipment (UE), the control information including hybrid automatic repeat request-acknowledgement (HARQ-ACK) codebook information for a HARQ-ACK signal in a physical uplink control channel (PUCCH) from the UE to the base station;
• encode physical downlink shared channel (PDSCH) transmissions to the UE based on the control information;
• and
• decode the HARQ-ACK signal from the UE;
• wherein the HARQ-ACK codebook information includes information on a size of a HARQ-ACK aggregation window for the HARQ-ACK signal;
• and
• wherein the control information is in at least one of a downlink control information (DCI) or radio resource control (RRC) signaling, the control information to be decodable by the UE for the UE to determine the size of the HARQ-ACK aggregation window based on at least one of a decoding of the DCI, or the radio resource control (RRC) signaling.

A method to be performed by a user equipment (UE), comprising:

• decoding control information from a base station, the control information including hybrid automatic repeat request-acknowledgement (HARQ-ACK) codebook information for a HARQ-ACK signal in a physical uplink control channel (PUCCH) from the UE to the base station;
• decoding physical downlink shared channel (PDSCH) transmissions from the base station;
• and encoding the HARQ-ACK signal for transmission to the base station based on the control information and based on the PDSCH;
• wherein the HARQ-ACK codebook information includes information on a size of a HARQ-ACK aggregation window for the HARQ-ACK signal;
• wherein the control information is in at least one of a downlink control information (DCI) or radio resource control (RRC) signaling;
• and
• wherein the size of the HARQ-ACK aggregation window is configured based on at least one of a decoding of the DCI, or the radio resource control (RRC) signaling.