Method and apparatus for HARQ-ACK codebook determination for frame-based equipment operation
The present application is related to a method and apparatus for semi-static hybrid automatic repeat request acknowledgement (HARQ-ACK) codebook determination for FBE operation under 3GPP 5G new radio (NR). A method for wireless communications performed by a UE includes: receiving downlink control information (DCI) for scheduling a data transmission in a current periodic channel occupancy; determining whether there is HARQ-ACK feedback corresponding to a data transmission postponed in an earlier periodic channel occupancy; and transmitting a HARQ-ACK codebook in the current periodic channel occupancy, wherein, in response to determining that there is the HARQ-ACK feedback corresponding to the data transmission postponed in the earlier periodic channel occupancy, the HARQ-ACK codebook comprises HARQ-ACK feedback corresponding to the data transmission in the current periodic channel occupancy and the postponed HARQ-ACK feedback corresponding to the data transmission in the earlier periodic channel occupancy.
1. A method performed by a user equipment (UE), the method comprising:
receiving first downlink control information (DCI) for scheduling a first data transmission in a first fixed frame period (FFP);
receiving second DCI for scheduling a second data transmission in a second FFP that is later than the first FFP;
receiving indications of downlink association sets which respectively cover intra-FFP hybrid automatic repeat request acknowledgement (HARQ-ACK) feedback and cross-FFP HARQ-ACK feedback;
determining whether there is HARQ-ACK feedback corresponding to the first data transmission postponed in the first FFP based on the indications of the downlink association sets; and
transmitting a HARQ-ACK codebook in the second FFP, wherein, in response to determining that the HARQ-ACK feedback corresponding to the first data transmission is postponed in the first FFP, the HARQ-ACK codebook comprises HARQ-ACK feedback corresponding to the second data transmission and the HARQ-ACK feedback corresponding to the first data transmission.
2. The method of claim 1 , wherein the first DCI includes a first indicator indicating that the HARQ-ACK feedback corresponding to the first data transmission is postponed.
3. The method of claim 1 , wherein determining whether there is the HARQ-ACK feedback corresponding to the first data transmission postponed in the first FFP comprises:
wherein the second DCI includes a second indicator indicating a set of HARQ feedback timing offset values; and
determining, based on the set of HARQ feedback timing offset values, whether there is at least one slot in the first FFP included in a downlink association set associated with the HARQ-ACK codebook.
4. The method of claim 1 , wherein the second DCI includes a second indicator indicating a set of HARQ feedback timing offset values from a plurality of sets of HARQ feedback timing offset values.
5. The method of claim 4 , wherein the plurality of sets of HARQ feedback timing offset values are configured by radio resource control (RRC) signaling.
6. The method of claim 5 , wherein the plurality of sets of HARQ feedback timing offset values include at least one set of HARQ-ACK feedback timing offset values, and the at least one set of HARQ-ACK feedback timing offset values corresponds to a downlink association set including one or more slots in the first FFP.
7. The method of claim 1 , wherein determining whether there is the HARQ-ACK feedback corresponding to the first data transmission postponed in the first FFP is based on the second DCI includes a second indicator indicating an existence of the HARQ-ACK feedback postponed in the first FFP.
8. The method of claim 1 , wherein the second DCI includes a second indicator indicating a total number of one or more physical downlink shared channel (PDSCH) transmissions with corresponding HARQ-ACK feedback postponed in the first FFP.
9. The method of claim 1 , wherein the second DCI includes a second indicator indicating a total number of HARQ-ACK information bits for the HARQ-ACK feedback postponed in the first FFP.
10. 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 first downlink control information (DCI) for scheduling a first data transmission in a first fixed frame period (FFP);
receive second DCI for scheduling a second data transmission in a second FFP that is later than the first FFP;
receive indications of downlink association sets which respectively cover intra-FFP hybrid automatic repeat request acknowledgement (HARQ-ACK) feedback and cross-FFP HARQ-ACK feedback;
determine whether there is HARQ-ACK feedback corresponding to the first data transmission postponed in the first FFP based on the indications of the downlink association sets; and
transmit a HARQ-ACK codebook in the FFP, wherein, in response to determining that the HARQ-ACK feedback corresponding to the first data transmission is postponed in the first FFP, the HARQ-ACK codebook comprises HARQ-ACK feedback corresponding to the second data transmission and the HARQ-ACK feedback corresponding to the first data transmission.
11. The UE of claim 10 , wherein the second DCI includes a second indicator indicating a set of HARQ feedback timing offset values, and to determine whether there is the HARQ-ACK feedback corresponding to the first data transmission postponed in the first FFP, the at least one processor is configured to cause the UE to:
determine, based on the set of HARQ feedback timing offset values, whether there is at least one slot in the first FFP included in a downlink association set associated with the HARQ-ACK codebook.
12. The UE of claim 10 , wherein the second DCI includes a second indicator indicating a set of HARQ feedback timing offset values from a plurality of sets of HARQ feedback timing offset values.
13. The UE of claim 10 , wherein the at least one processor is configured to cause the UE to determine whether there is the HARQ-ACK feedback corresponding to the first data transmission postponed in the first FFP based on the second DCI includes a second indicator indicating an existence of the HARQ-ACK feedback postponed in the first FFP.
14. The UE of claim 10 , wherein the second DCI includes a second indicator indicating a total number of one or more physical downlink shared channel (PDSCH) transmissions with corresponding HARQ-ACK feedback postponed in the first FFP.
15. A base station 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 base station to:
transmit first downlink control information (DCI) for scheduling a first data transmission in a first fixed frame period (FFP);
transmit-second DCI for scheduling a second data transmission in a second FFP that is later than the first FFP;
transmit indications of downlink association sets which respectively cover intra-FFP hybrid automatic repeat request acknowledgment (HARQ-ACK) feedback and cross-FFP HARQ-ACK feedback; and
receive a HARQ-ACK codebook in the second FFP, wherein, based on the HARQ-ACK feedback corresponding to the first data transmission being postponed in the first FFP and the indications of the downlink association sets, the HARQ-ACK codebook comprises HARQ-ACK feedback corresponding to the second data transmission and the HARQ-ACK feedback corresponding to the first data transmission.
16. The base station of claim 15 , wherein the first DCI includes a first indicator indicating that the HARQ-ACK feedback corresponding to the first data transmission is postponed, and wherein the first indicator indicates a non-numerical HARQ-ACK feedback timing offset value for the first data transmission.
17. The base station of claim 15 , wherein the second DCI includes a second indicator indicating a set of HARQ feedback timing offset values from a plurality of sets of HARQ feedback timing offset values.
18. The base station of claim 15 , wherein the second DCI includes a second indicator indicating an existence of the HARQ-ACK feedback postponed in the first FFP.
19. The UE of claim 10 , wherein, to determine whether there is the HARQ-ACK feedback corresponding to the first data transmission postponed in the first FFP, the at least one processor is configured to cause the UE to:
receive first DCI for scheduling the first data transmission in the first FFP, wherein the first DCI includes a first indicator indicating that the HARQ-ACK feedback corresponding to the first data transmission is postponed.
20. A processor for wireless communication, comprising:
at least one controller coupled with at least one memory and configured to cause the processor to:
receive first downlink control information (DCI) for scheduling a first data transmission in a first fixed frame period (FFP);
receive second DCI for scheduling a second data transmission in a second FFP that is later than the first FFP;
receive indications of downlink association sets which respectively cover intra-FFP hybrid automatic repeat request acknowledgement (HARQ-ACK) feedback and cross-FFP HARQ-ACK feedback;
determine whether there is HARQ-ACK feedback corresponding to the first data transmission postponed in the first FFP based on the indications of the downlink association sets; and
transmit a HARQ-ACK codebook in the second FFP, wherein, in response to determining that the HARQ-ACK feedback corresponding to the first data transmission is postponed in the first FFP, the HARQ-ACK codebook comprises HARQ-ACK feedback corresponding to the second data transmission and the HARQ-ACK feedback corresponding to the first data transmission.