USER EQUIPMENT AND METHOD FOR HANDLING HYBRID AUTOMATIC REPEAT REQUEST-ACKNOWLEDGMENT CODEBOOK TRANSMISSION

1 . A method for handling hybrid automatic repeat request (HARQ)-acknowledgment (ACK) codebook transmission performed by a user equipment (UE), the method comprising:

receiving, from a base station (BS), a first configuration for unicast semi-persistent scheduling (SPS) physical downlink shared channel (PDSCH), a second configuration for multicast SPS PDSCH, and a third configuration for unicast PDSCH;

receiving, from the BS, a physical uplink control channel (PUCCH) configuration for unicast;

receiving, from the BS, downlink control information (DCI) scheduling a unicast PDSCH;

determining a Type-1 HARQ-ACK codebook corresponding to the unicast PDSCH based on the first configuration for unicast SPS PDSCH, the second configuration for multicast SPS PDSCH, and the third configuration for unicast PDSCH; and

transmitting, to the BS, the Type-1 HARQ-ACK codebook corresponding to the unicast PDSCH in a first slot.

2 . The method of claim 1 , wherein:

the first configuration for unicast SPS PDSCH configures a first number of PDSCH repetitions;

the second configuration for multicast SPS PDSCH configures a second number of PDSCH repetitions; and

the third configuration for unicast PDSCH configures a third number of PDSCH repetitions.

3 . The method of claim 2 , wherein determining the Type-1 HARQ-ACK codebook based on the first configuration for unicast SPS PDSCH, the second configuration for multicast SPS PDSCH, and the third configuration for unicast PDSCH comprises:

determining a maximum value of the first number of PDSCH repetitions, the second number of PDSCH repetitions, and the third number of PDSCH repetitions to be a total number of slots; and

determining whether one or more HARQ-ACK bits associated with one or more sets of slots determined based on the total number of slots are included in the Type-1 HARQ-ACK codebook.

4 . The method of claim 3 , wherein determining the Type-1 HARQ-ACK codebook based on the first configuration for unicast SPS PDSCH, the second configuration for multicast SPS PDSCH, and the third configuration for unicast PDSCH further comprises:

obtaining one or more HARQ-ACK feedback offsets according to the PUCCH configuration;

determining the one or more sets of slots corresponding to the one or more HARQ-ACK feedback offsets based on the one or more HARQ-ACK feedback offsets; and

determining that a HARQ-ACK bit of the one or more HARQ-ACK bits is included in the Type-1 HARQ-ACK codebook in a case that a PDSCH candidate position corresponding to the HARQ-ACK bit does not conflict with an unavailable symbol in a set of slots of the one or more sets of slots, wherein:

the HARQ-ACK bit is associated with the set of slots corresponding to a HARQ-ACK feedback offset of the one or more HARQ-ACK feedback offsets,

a length of the set of slots is the total number of slots,

an ending slot of the set of slots is a second slot,

the second slot is the HARQ-ACK feedback offset prior to the first slot, and

the unavailable symbol is an uplink symbol.

5 . The method of claim 4 , wherein the one or more HARQ-ACK feedback offsets are configured by the PUCCH configuration.

6 . The method of claim 3 , wherein a length of each of the one or more sets of slots is the total number of slots.

7 . The method of claim 1 , wherein:

the Type-1 HARQ-ACK codebook is transmitted via a PUCCH; and

the PUCCH is determined from one or more PUCCHs configured by the PUCCH configuration.

8 . A user equipment (UE) for handling hybrid automatic repeat request (HARQ)-acknowledgment (ACK) codebook transmission, comprising:

one or more non-transitory computer-readable media having computer-executable instructions embodied therein; and

at least one processor coupled to the one or more non-transitory computer-readable media, the at least one processor configured to execute the computer-executable instructions to cause the UE to perform the method of any of claims 1 to 7 .

9 . A method for handling hybrid automatic repeat request (HARQ)-acknowledgment (ACK) codebook reception performed by a base station (BS), the method comprising:

transmitting, to a user equipment (UE), a first configuration for unicast semi-persistent scheduling (SPS) physical downlink shared channel (PDSCH), a second configuration for multicast SPS PDSCH, and a third configuration for unicast PDSCH;

transmitting, to the UE, a physical uplink control channel (PUCCH) configuration for unicast;

transmitting, to the UE, downlink control information (DCI) scheduling a unicast PDSCH; and

receiving, from the UE, a Type-1 HARQ-ACK codebook corresponding to the unicast PDSCH in a first slot, wherein the first configuration for unicast SPS PDSCH, the second configuration for multicast SPS PDSCH, and the third configuration for unicast PDSCH enable the UE to determine the Type-1 HARQ-ACK codebook corresponding to the unicast PDSCH.

10 . The method of claim 9 , wherein:

the first configuration for unicast SPS PDSCH configures a first number of PDSCH repetitions;

the second configuration for multicast SPS PDSCH configures a second number of PDSCH repetitions; and

the third configuration for unicast PDSCH configures a third number of PDSCH repetitions.

11 . The method of claim 9 , wherein the PUCCH configuration configures one or more HARQ-ACK feedback offsets.

12 . The method of claim 9 , wherein:

the Type-1 HARQ-ACK codebook is received via a PUCCH from one or more PUCCHs configured by the PUCCH configuration.

13 . A base station (BS) for handling hybrid automatic repeat request (HARQ)-acknowledgment (ACK) codebook reception, comprising:

one or more non-transitory computer-readable media having computer-executable instructions embodied therein; and

at least one processor coupled to the one or more non-transitory computer-readable media, the at least one processor configured to execute the computer-executable instructions to cause the BS to perform the method of any of claims 9 to 12 .