PDSCH processing in presence of downlink preemption indication

1. A method for wireless communications by a user equipment (UE), comprising:

receiving, in a first slot, downlink control information (DCI) scheduling a physical downlink shared channel (PDSCH) transmission in a second slot, the DCI including a feedback timing indicator indicating a first number of slots between the PDSCH transmission until a third slot for the UE to send feedback for the PDSCH;

receiving the PDSCH transmission in the second slot;

determining how to process the PDSCH transmission based on whether the first number of slots indicated by the feedback timing indicator is equal to or larger than a sum of a second number of slots between the PDSCH transmission in the second slot and a fourth slot in which a downlink preemption indication (DLPI) is received by the UE and a third number of slots for a minimum processing time of a PDSCH, wherein determining how to process the PDSCH transmission comprises processing the PDSCH transmission with accounting for the DLPI when the first number of slots indicated by the feedback timing indicator is equal to or larger than the sum of the second number of slots and the third number of slots; and

processing the PDSCH transmission based on the determination.

2. The method of claim 1 , wherein determining how to process the PDSCH transmission comprises processing the PDSCH transmission, after receiving the PDSCH transmission in the second slot, without accounting for the DLPI when the first number of slots indicated by the feedback timing indicator is smaller than the sum of the second number of slots and the third number of slots.

3. The method of claim 1 , wherein determining how to process the PDSCH transmission comprises declaring an error case when the first number of slots indicated by the feedback timing indicator is smaller than the sum of the second number of slots and the third number of slots.

4. The method of claim 1 , wherein the minimum processing time associated with the UE comprises an amount of time for the UE to decode the PDSCH transmission and prepare hybrid automatic repeat request (HARQ) feedback for the PDSCH transmission.

5. The method of claim 1 , further comprising determining the fourth slot in which the DLPI is transmitted based on a periodicity associated with the DLPI.

6. The method of claim 1 , wherein the DLPI indicates PDSCH resources in at least one of: the second slot or the first number of slots that are preempted by another PDSCH transmission.

7. The method of claim 6 , wherein:

the PDSCH transmission comprises an enhanced mobile broadband (eMBB) PDSCH transmission; and

the another PDSCH transmission comprises an ultra-reliable low-latency communication (URLLC) PDSCH transmission.

8. An apparatus for wireless communications, comprising:

at least one processor configured to:

receive, in a first slot, downlink control information (DCI) scheduling a physical downlink shared channel (PDSCH) transmission in a second slot, the DCI including a feedback tinning indicator indicating a first number of slots between the PDSCH transmission until a third slot for a user equipment (UE) to send feedback for the PDSCH;

receive the PDSCH transmission in the second slot;

determine how to process the PDSCH transmission based on whether the first number of slots indicated by the feedback timing indicator is equal to or larger than a sum of a second number of slots between the PDSCH transmission in the second slot and a fourth slot in which a downlink preemption indication (DLPI) is received by the UE and a third number of slots for a minimum processing time of a PDSCH, wherein determining how to process the PDSCH transmission comprises processing the PDSCH transmission with accounting for the DLPI when the first number of slots indicated by the feedback timing indicator is equal to or larger than the sum of the second number of slots and the third number of slots; and

process the PDSCH transmission based on the determination; and a memory coupled with the at least one processor.

9. The apparatus of claim 8 , wherein the at least one processor is configured to determine how to process the PDSCH transmission including processing the PDSCH transmission, after receiving the PDSCH transmission in the second slot, without accounting for the DLPI when the first number of slots indicated by the feedback timing indicator is smaller than the sum of the second number of slots and the third number of slots.

10. The apparatus of claim 8 , wherein the at least one processor is configured to determine how to process the PDSCH transmission including declaring an error case when the first number of slots indicated by the feedback timing indicator is smaller than the sum of the second number of slots and the third number of slots.

11. The apparatus of claim 8 , wherein the minimum processing time associated with the apparatus comprises an amount of time for the apparatus to decode the PDSCH transmission and prepare hybrid automatic repeat request (HARQ) feedback for the PDSCH transmission.

12. The apparatus of claim 8 , wherein the at least one processor is configured to determine the fourth slot in which the DLPI is transmitted based on a periodicity associated with the DLPI.

13. The apparatus of claim 8 , wherein the DLPI indicates PDSCH resources in at least one of: the second slot or the first number of slots that are preempted by another PDSCH transmission.

14. The apparatus of claim 13 , wherein:

the PDSCH transmission comprises an enhanced mobile broadband (eMBB) PDSCH transmission; and

the another PDSCH transmission comprises an ultra-reliable low-latency communication (URLLC) PDSCH transmission.

15. An apparatus for wireless communications, comprising:

means for receiving, in a first slot, downlink control information (DCI) scheduling a physical downlink shared channel (PDSCH) transmission in a second slot, the DCI including a feedback timing indicator indicating a first number of slots between the PDSCH transmission until a third slot for a user equipment (UE) to send feedback for the PDSCH;

means for receiving the PDSCH transmission in the second slot;

means for determining how to process the PDSCH transmission based on whether the first number of slots indicated by the feedback timing indicator is equal to or larger than a sum of a second number of slots between the PDSCH transmission in the second slot and a fourth slot in which a downlink preemption indication (DLPI) is received by the UE and a third number of slots for a minimum processing time of a PDSCH, wherein determining how to process the PDSCH transmission comprises processing the PDSCH transmission with accounting for the DLPI when the first number of slots indicated by the feedback timing indicator is equal to or larger than the sum of the second number of slots and the third number of slots; and

means for processing the PDSCH transmission based on the determination.

16. The apparatus of claim 15 , wherein means for determining how to process the PDSCH transmission comprises means for processing the PDSCH transmission, after receiving the PDSCH transmission in the second slot, without accounting for the DLPI when the first number of slots indicated by the feedback timing indicator is smaller than the sum of the second number of slots and the third number of slots.

17. The apparatus of claim 15 , wherein means for determining how to process the PDSCH transmission comprises means for declaring an error case when the first number of slots indicated by the feedback timing indicator is smaller than the sum of the second number of slots and the third number of slots.

18. A non-transitory computer readable medium having computer executable code stored thereon for wireless communications, comprising:

code for receiving, in a first slot, downlink control information (DCI) scheduling a physical downlink shared channel (PDSCH) transmission in a second slot, the DCI including a feedback timing indicator indicating a first number of slots between the PDSCH transmission until a third slot for a user equipment (UE) to send feedback for the PDSCH;

code for receiving the PDSCH transmission in the second slot;

code for determining how to process the PDSCH transmission based on whether the first number of slots indicated by the feedback timing indicator is equal to or larger than a sum of a second number of slots between the PDSCH transmission in the second slot and a fourth slot in which a downlink preemption indication (DLPI) is received by the UE and a third number of slots for a minimum processing time of a PDSCH, wherein determining how to process the PDSCH transmission comprises processing the PDSCH transmission with accounting for the DLPI when the first number of slots indicated by the feedback timing indicator is equal to or larger than the sum of the second number of slots and the third number of slots; and

code for processing the PDSCH transmission based on the determination.

19. The non-transitory computer readable medium of claim 18 , wherein code for determining how to process the PDSCH transmission comprises code for processing the PDSCH transmission, after receiving the PDSCH transmission in the second slot, without accounting for the DLPI when the first number of slots indicated by the feedback timing indicator is smaller than the sum of the second number of slots and the third number of slots.

20. The non-transitory computer readable medium of claim 18 , wherein code for determining how to process the PDSCH transmission comprises code for declaring an error case when the first number of slots indicated by the feedback timing indicator is smaller than the sum of the second number of slots and the third number of slots.