Type-1 HARQ-ACK codebook in PUCCH for sub-slot HARQ-ACK
Systems and methods for providing feedback are provided. In some embodiments, a method performed by a wireless device includes: determining a set of occasions for candidate PDSCH receptions taking into account the number of sub-slots in an uplink slot; determining a set of occasions for Semi-Persistent Scheduling (SPS) PDSCH releases taking into account the number of sub-slots; the number of sub-slots is used to scale the number of downlink slots within an uplink slot when determining a set of occasions for candidate PDSCH receptions; and the number of sub-slots is used to scale the number of downlink slots within an uplink slot when determining a set of occasions for SPS PDSCH releases. Some embodiments allow for a full support of Type-1 HARQ-ACK codebook for subslot-based HARQ-ACK. Some embodiments are simple to implement into the specification and preserve the existing behavior for the slot-based Type-1 HARQ-ACK codebook determination.
1. A method performed by a wireless device for providing feedback, the method comprising:
determining a set of occasions for candidate Physical Downlink Shared Channel (PDSCH) receptions taking into account a number of sub-slots in an Uplink (UL) slot;
determining a set of occasions for Semi-Persistent Scheduling (SPS) PDSCH releases taking into account the number of sub-slots in the UL slot; and
utilizing the set of occasions for PDSCH receptions and/or the set of occasions for SPS PDSCH releases in communication with a base station.
2. The method of claim 1 wherein the number of sub-slots in the UL slot is used to scale a number of Downlink (DL) slots within the UL slot when determining the set of occasions for candidate PDSCH receptions.
3. The method of claim 1 wherein the number of sub-slots in the UL slot is used to scale the number of DL slots within the UL slot when determining the set of occasions for SPS PDSCH releases.
4. The method of claim 1 wherein the number of sub-slots in the UL slot is used to divide the number of DL slots within the UL slot when determining the set of occasions for candidate PDSCH receptions or SPS PDSCH releases.
5. The method of claim 1 wherein if the number of sub-slots in the UL slot is N, there are effectively (2 μ DL −μ UL )/N DL slots within a UL sub-slot.
6. The method of claim 1 wherein the number of sub-slots in the UL slot is used to scale the number of UL slots within a DL slot when determining the set of occasions for candidate PDSCH receptions or SPS PDSCH releases.
7. The method of claim 1 wherein the number of sub-slots in the UL slot is used to multiply the number of UL slots within a DL slot when determining the set of occasions for candidate PDSCH receptions or SPS PDSCH releases to reflect an effective number of UL sub-slots within a DL slot.
8. The method of claim 1 wherein the number of sub-slots in the UL slot can be used to scale both the number of DL slots within the UL slot and the number of UL slots within a DL slot.
9. The method of claim 1 wherein the number of DL slots within the UL slot can be expressed by 2 μ DL −μ UL and similarly the number of UL slots within a DL slot can be expressed by 2 μ UL −μ DL , where a downlink Subcarrier Spacing (SCS) configuration μ DL and an uplink SCS configuration μ UL are provided by subcarrierSpacing in Bandwidth Part (BWP)-Downlink and BWP-Uplink for an active DL BWP and an active UL BWP.
10. The method of claim 1 wherein the number of sub-slots in the UL slot can be derived based on a sub-slot configuration.
11. The method of claim 10 wherein the sub-slot configuration comprises an RRC parameter subslotLengthForPUCCH-r16 in PUCCH-Config IE.
12. A method performed by a base station for receiving feedback, the method comprising:
determining a set of occasions for candidate Physical Downlink Shared Channel, PDSCH, receptions taking into account a number of sub-slots in an Uplink (UL) slot;
determining a set of occasions for Semi-Persistent Scheduling (SPS) PDSCH releases taking into account the number of sub-slots in the UL slot; and
utilizing the set of occasions for PDSCH receptions and/or the set of occasions for SPS PDSCH releases in communication with wireless device.
13. The method of claim 12 wherein the number of sub-slots in the UL slot is used to scale a number of Downlink (DL) slots within the UL slot when determining a set of occasions for candidate PDSCH receptions.
14. The method of claim 12 wherein the number of sub-slots in the UL slot is used to scale the number of DL slots within the UL slot when determining the set of occasions for SPS PDSCH releases.
15. The method of claim 12 wherein the number of sub-slots in the UL slot is used to divide the number of DL slots within the UL slot when determining the set of occasions for candidate PDSCH receptions or SPS PDSCH releases.
16. The method of claim 12 wherein if the number of sub-slots in the UL slot is N, there are effectively (2 μ DL −μ UL )/N DL slots within a UL sub-slot.
17. The method of claim 12 wherein the number of sub-slots in the UL slot is used to scale the number of UL slots within a DL slot when determining the set of occasions for candidate PDSCH receptions or SPS PDSCH releases.
18. The method of claim 12 wherein the number of sub-slots in the UL slot is used to multiply the number of UL slots within a DL slot when determining the set of occasions for candidate PDSCH receptions or SPS PDSCH releases to reflect an effective number of UL sub-slots within a DL slot.
19. The method of claim 12 wherein the number of sub-slots in the UL slot can be used to scale both the number of DL slots within the UL slot and the number of UL slots within a DL slot.
20. The method of claim 12 wherein the number of DL slots within the UL slot can be expressed by 2 μ DL −μ UL and similarly the number of UL slots within a DL slot can be expressed by 2 μ UL −μ DL , where a downlink Subcarrier Spacing (SCS) configuration μ DL and an uplink SCS configuration μ UL are provided by subcarrierSpacing in Bandwidth Part (BWP)-Downlink and BWP-Uplink for an active DL BWP and an active UL BWP.
21. The method of claim 12 wherein the number of sub-slots in the UL slot can be derived based on a sub-slot configuration.
22. The method of claim 21 wherein the sub-slot configuration comprises a Radio Resource Control (RRC) parameter subslotLengthForPhysical Uplink Control Channel (PUCCH)-r16 in PUCCH-Config Information Element (IE).
23. A wireless device for providing feedback, the wireless device comprising:
one or more processors; and
memory storing instructions executable by the one or more processors, whereby the wireless device is operable to:
determine a set of occasions for candidate Physical Downlink Shared Channel (PDSCH) receptions taking into account a number of sub-slots in an Uplink (UL) slot; and
determine a set of occasions for Semi-Persistent Scheduling (SPS) PDSCH releases taking into account the number of sub-slots in the UL slot.
24. A base station for priority level handling, the base station comprising:
one or more processors; and
memory comprising instructions to cause the base station to:
determine a set of occasions for candidate Physical Downlink Shared Channel, PDSCH, receptions taking into account a number of sub-slots in an Uplink (UL) slot; and
determine a set of occasions for Semi-Persistent Scheduling (SPS) PDSCH releases taking into account the number of sub-slots in the UL slot.