Method and apparatus for determining HARQ-ACK codebook

A user equipment (UE) for wireless communication, comprising:

• at least one memory;
• and
• at least one processor coupled with the at least one memory and configured to cause the UE to:
• receive a first downlink control information (DCI) indicating a first group index associated with respective first physical downlink shared channel (PDSCH) transmissions of a first group of PDSCH transmissions;
• receive a second DCI indicating a second group index associated with respective second PDSCH transmissions of a second group of PDSCH transmissions, wherein the second DCI schedules a PDSCH transmission of the second group of PDSCH transmissions, and wherein the second DCI comprises a field with two bits that indicates whether a transmission of first hybrid automatic repeat request-acknowledgement (HARQ-ACK) feedback associated with the first group of PDSCH transmissions and second HARQ-ACK feedback associated with the second group of PDSCH transmissions in a HARQ-ACK codebook is requested;
• and
• transmit the HARQ-ACK codebook.

A network equipment (NE) for wireless communication, comprising:

• at least one memory;
• and
• at least one processor coupled with the at least one memory and configured to cause the NE to:
• transmit a first downlink control information (DCI) indicating a first group index associated with respective first physical downlink shared channel (PDSCH) transmissions of a first group of PDSCH transmissions;
• transmit a second DCI indicating a second group index associated with respective second PDSCH transmissions of a second group of PDSCH transmissions, wherein the second DCI schedules a PDSCH transmission of the second group of PDSCH transmissions, and wherein the second DCI comprises a field with two bits that indicates whether a transmission of first hybrid automatic repeat request-acknowledgement (HARQ-ACK) feedback associated with the first group of PDSCH transmissions and second HARQ-ACK feedback associated with the second group of PDSCH transmissions in a HARQ-ACK codebook is requested;
• and
• receive the HARQ-ACK codebook.

A method performed by a network equipment (NE), the method comprising:

• transmit a first downlink control information (DCI) indicating a first group index associated with respective first physical downlink shared channel (PDSCH) transmissions of a first group of PDSCH transmissions;
• transmit a second DCI indicating a second group index associated with respective second PDSCH transmissions of a second group of PDSCH transmissions, wherein the second DCI schedules a PDSCH transmission of the second group of PDSCH transmissions, and wherein the second DCI comprises a field with two bits that indicates whether a transmission of first hybrid automatic repeat request-acknowledgement (HARQ-ACK) feedback associated with the first group of PDSCH transmissions and second HARQ-ACK feedback associated with the second group of PDSCH transmissions in a HARQ-ACK codebook is requested;
• and
• receive the HARQ-ACK codebook.