Methods, apparatus and systems for enhanced control signaling of ultra-reliable transmissions

1. A method implemented by a wireless transmit/receive unit (WTRU), the method comprising:

receiving configuration information indicating a plurality of physical uplink control channel (PUCCH) resource sets to be used for transmission of hybrid automatic repeat request (HARQ) information, wherein each of the plurality of PUCCH resource sets includes a plurality of PUCCH resources;

receiving, in first downlink control information (DCI), information including (1) a first PUCCH set indication and (2) a first resource indicator;

receiving a first physical downlink shared channel (PDSCH) transmission according to the first DCI;

selecting a PUCCH resource set from the plurality of PUCCH resource sets based on at least the first PUCCH set indication;

selecting a PUCCH resource from the plurality of PUCCH resources of the selected PUCCH resource set based on at least the first resource indicator, wherein the first PUCCH set indication and the first resource indicator are separate fields in the first DCI; and

sending a PUCCH transmission including HARQ information using the selected PUCCH resource.

2. The method of claim 1 , further comprising:

receiving, in second DCI, information including (1) a second PUCCH set indication and (2) a second resource indicator; and

receiving a second PDSCH transmission according to the second DCI;

wherein the PUCCH resource set is selected from the plurality of PUCCH resource sets based on at least the first PUCCH set indication and the second PUCCH set indication.

3. The method of claim 2 , further comprising determining first HARQ-ACK information associated with the first PDSCH transmission, and second HARQ-ACK information associated with the second PDSCH transmission.

4. The method of claim 3 , further comprising determining that a first PUCCH resource indicated by the first resource indicator and a second PUCCH resource indicated by the second resource indicator overlap.

5. The method of claim 4 , further comprising determining whether lower priority HARQ information is allowed to be multiplexed with higher priority HARQ information and, on condition that lower priority HARQ information is allowed to be multiplexed with higher priority HARQ information, multiplexing the first and second HARQ information and sending the multiplexed first and second HARQ information in the PUCCH transmission.

6. The method of claim 4 , wherein on condition that lower priority HARQ information is not allowed to be multiplexed with higher priority HARQ information, the PUCCH transmission includes the higher priority HARQ information and does not include the lower priority HARQ information.

7. The method of claim 4 , wherein, on condition that a first PUCCH resource indicated by the first resource indicator and a second PUCCH resource indicated by the second resource indicator overlap, the PUCCH transmission is associated with one of: (1) the first PUCCH set indication that has a higher priority than the second PUCCH set indication, or (2) the second PUCCH set indication that has a higher priority than the first PUCCH set indication.

8. The method of claim 7 , wherein the PUCCH transmission is associated with the first PUCCH set indication.

9. The method of claim 7 , wherein the PUCCH transmission is associated with the second PUCCH set indication.

10. The method of claim 7 , further comprising

determining that the first PUCCH resource indicated by the first resource indicator and the second PUCCH resource indicated by the second resource indicator overlap any of: (1) in frequency or (2) in time.

11. The method of claim 7 , wherein the first DCI includes a first field indicating a first index associated with the first PUCCH resource and the second DCI includes a second field indicating a second index associated with the second PUCCH resource.

12. The method of claim 11 , wherein the first PUCCH set indication indicates a first priority associated with the first index and the second PUCCH set indication indicates a second priority associated with the second index.

13. A wireless transmit/receive unit (WTRU), comprising:

a receiver and a transmitter, wherein the receiver is configured to:

receive configuration information indicating a plurality of physical uplink control channel (PUCCH) resource sets to be used for transmission of hybrid automatic repeat request (HARQ) information, wherein each of the plurality of PUCCH resource sets includes a plurality of PUCCH resources;

receive, in first downlink control information (DCI), information including (1) a first PUCCH set indication and (2) a first resource indicator;

receive a first physical downlink shared channel (PDSCH) transmission according to the first DCI;

and

a processor configured to select a PUCCH resource set from the plurality of PUCCH resource sets based on at least the first PUCCH set indication and select a PUCCH resource from the plurality of PUCCH resources of the selected PUCCH resource set based on at least the first resource indicator, wherein the first PUCCH set indication and the first resource indicator are separate fields in the first DCI,

wherein the transmitter is configured to send a PUCCH transmission including HARQ information using the selected PUCCH resource.

14. The WTRU of claim 13 , wherein the receiver is configured to:

receive, in second DCI, information including (1) a second PUCCH set indication and (2) a second resource indicator; and

receive a second PDSCH transmission according to the second DCI;

wherein the PUCCH resource set is selected from the plurality of PUCCH resource sets based on at least the first PUCCH set indication and the second PUCCH set indication.

15. The WTRU of claim 14 , wherein, on condition that a first PUCCH resource indicated by the first resource indicator and a second PUCCH resource indicated by the second resource indicator overlap, the PUCCH transmission is associated with one of: (1) the first PUCCH set indication that has a higher priority than the second PUCCH set indication, or (2) the second PUCCH set indication that has a higher priority than the first PUCCH set indication.

16. The WTRU of claim 15 , wherein the PUCCH transmission is associated with the first PUCCH set indication.

17. The WTRU of claim 15 , wherein the PUCCH transmission is associated with the second PUCCH set indication.

18. The WTRU of claim 15 , wherein the processor is configured to determine that the first PUCCH resource indicated by the first resource indicator and the second PUCCH resource indicated by the second resource indicator overlap any of: (1) in frequency or (2) in time.

19. The WTRU of claim 15 , wherein the first DCI includes a first field indicating a first index associated with the first PUCCH resource and the second DCI includes a second field indicating a second index associated with the second PUCCH resource.

20. The WTRU of claim 19 , wherein the first PUCCH set indication indicates a first priority associated with the first index and the second PUCCH set indication indicates a second priority associated with the second index.

21. The WTRU of claim 14 , wherein the processor is configured to determine first HARQ-ACK information associated with the first PDSCH transmission, and second HARQ-ACK information associated with the second PDSCH transmission.

22. The WTRU of claim 21 , wherein the processor is configured to determine that a first PUCCH resource indicated by the first resource indicator and a second PUCCH resource indicated by the second resource indicator overlap.

23. The WTRU of claim 22 , wherein the processor is configured to determine whether lower priority HARQ information is allowed to be multiplexed with higher priority HARQ information, and wherein on condition that lower priority HARQ information is allowed to be multiplexed with higher priority HARQ information, the transmitter is configured to multiplex the first and second HARQ information and send the multiplexed first and second HARQ information in the PUCCH transmission.

24. The WTRU of claim 22 , wherein on condition that lower priority HARQ information is not allowed to be multiplexed with higher priority HARQ information, the PUCCH transmission includes the higher priority HARQ information and does not include the lower priority HARQ information.

25. A wireless transmit/receive unit (WTRU), comprising:

a receiver and a transmitter, wherein the receiver is configured to:

receive configuration information indicating a plurality of physical uplink control channel (PUCCH) resource sets to be used for transmission of hybrid automatic repeat request (HARQ) information, wherein each of the plurality of PUCCH resource sets includes a plurality of PUCCH resources;

receive, in first downlink control information (DCI), information including (1) a first PUCCH set indication; and (2) a first resource indicator, wherein the first PUCCH set indication and the first resource indicator are separate fields in the first DCI;

receive a first physical downlink shared channel (PDSCH) transmission according to the first DCI;

receive, in second DCI, information including (1) a second PUCCH set indication and (2) a second resource indicator, wherein the second PUCCH set indication and the second resource indicator are separate fields in the second DCI;

receive a second PDSCH transmission according to the second DCI; and

a processor configured to:

determine first HARQ information associated with the first PDSCH transmission;

select a first PUCCH resource set from the plurality of PUCCH resource sets based on at least the first PUCCH set indication, and select a first PUCCH resource from the plurality of PUCCH resources of the selected first PUCCH resource set based on at least the first resource indicator;

determine second HARQ information associated with the second PDSCH transmission;

select a second PUCCH resource set from the plurality of PUCCH resource sets based on at least the second PUCCH set indication and select a second PUCCH resource from the plurality of PUCCH resources of the selected second PUCCH resource set based on at least the second resource indicator;

determine a priority for each of the first and second HARQ information;

on condition that the first PUCCH resource overlaps in time with the second PUCCH resource, and on condition that the priority of the first HARQ information is different than the priority of the second HARQ information, determine whether lower priority HARQ information is allowed to be multiplexed with higher priority HARQ information;

wherein, on condition that lower priority HARQ information is allowed to be multiplexed with higher priority HARQ information, the transmitter is configured to multiplex the first and second HARQ information and send the multiplexed first and second HARQ information in a single PUCCH transmission.

26. The WTRU of claim 25 , wherein on condition that lower priority HARQ information is not allowed to be multiplexed with higher priority HARQ information, the single PUCCH transmission includes the higher priority HARQ information and does not include the lower priority HARQ information.

27. The WTRU of claim 25 , wherein the first DCI includes a first field indicating a first index associated with the first PUCCH resource and the second DCI includes a second field indicating a second index associated with the second PUCCH resource.

28. The WTRU of claim 27 , wherein the first PUCCH set indication indicates a first priority is associated with the first index and the second PUCCH set indication indicates a second priority associated with the second index.