Intra-UE prioritization in uplink transmissions
Methods and apparatuses are described herein for Intra-UE Prioritization in uplink (UL) transmissions. In an example, an apparatus may receive first information indicating a first uplink grant associated with a first transmission and second information indicating a second uplink grant associated with a second transmission. The apparatus may determine, based on the first information and the second information, that the first transmission and the second transmission overlap at least partially in time. The apparatus may determine a first priority associated with the first transmission and a second priority associated with the second transmission. The apparatus may then cause, based at least in part on the first priority and the second priority, at least one of: prioritization of one transmission over another transmission, or preemption of the first transmission by the second transmission.
1. A wireless transmit/receive unit (WTRU) comprising a processor configured to:
receive radio resource control signaling (RRC) comprising configuration information configuring a first Hybrid Automatic Repeat Request (HARQ) codebook associated with a first priority and a second HARQ codebook associated with a second priority, wherein the RRC signaling indicates that the first HARQ codebook is associated with a first sub-slot length for physical uplink control channel (PUCCH) feedback and that the second HARQ codebook is associated with a second sub-slot length for PUCCH feedback;
receive first downlink control information (DCI), the first DCI scheduling a first physical downlink shared channel (PDSCH) transmission, the first DCI indicating the first priority, wherein first HARQ feedback for the first PDSCH transmission is associated with the first HARQ codebook, and the first HARQ codebook is associated with the first priority;
receive second DCI, the second DCI scheduling a second PDSCH transmission, the second DCI indicating the second priority, wherein second HARQ feedback for the second PDSCH transmission is associated with the second HARQ codebook, and the second HARQ codebook is associated with the second priority;
determine, based on a first field in the first DCI, a first time for transmitting a first PUCCH transmission comprising the first HARQ feedback for the first PDSCH transmission, the first field indicating a first number of sub-slots according to the first sub-slot length associated with the first HARQ codebook;
determine, based on a second field in the second DCI, a second time for transmitting a second PUCCH transmission comprising the second HARQ feedback for the second PDSCH transmission, the second field indicating a second number of sub-slots according to the second sub-slot length associated with the second HARQ codebook;
determine that the first PUCCH transmission and the second PUCCH transmission at least partially overlap in time; and transmit the first PUCCH transmission and cancel at least a portion of the second PUCCH transmission based on the first priority being higher than the second priority;
transmit the first PUCCH transmission and cancel at least a portion of the second PUCCH transmission based on the first priority being higher than the second priority.
2. The WTRU of claim 1 , wherein the first DCI comprises a third field, the third field indicating the first priority, and the second DCI comprises a fourth field, the fourth field indicating the second priority.
3. The WTRU of claim 1 , wherein the first field corresponds to a K1 field of the first DCI.
4. The WTRU of claim 3 , wherein, for at least one priority level, the WTRU is configured to interpret the K1 field in units of slots.
5. The WTRU of claim 1 , wherein the RRC signaling indicates a first number of symbols for the first sub-slot length for PUCCH feedback and a second number of symbols for the second sub-slot length for PUCCH feedback, wherein the first number of symbols and the second number of symbols are different.
6. The WTRU of claim 1 , wherein the RRC signaling indicates that at least one of the first sub-slot length for PUCCH feedback or the second sub-slot length for PUCCH feedback has a length of half of a slot.
7. The WTRU of claim 1 , wherein the WTRU is configured to transmit at least two PUCCH transmissions in a single slot.
8. The WTRU of claim 7 , wherein each of the at least two PUCCH transmissions in a single slot is transmitted in a respective sub-slot of the single slot.
9. The WTRU of claim 1 , wherein the RRC signaling further comprises a first set of one or more PUCCH resources for the first HARQ codebook associated with the first priority, and a second set of one or more PUCCH resources for the second HARQ codebook associated with the second priority.
10. The WTRU of claim 1 , wherein HARQ feedback corresponding to the first HARQ codebook is separately encoded form HARQ feedback corresponding to the second HARQ codebook.
11. A method implemented by a wireless transmit/receive unit (WTRU), the method comprising:
receiving radio resource control signaling (RRC) comprising configuration information configuring a first Hybrid Automatic Repeat Request (HARQ) codebook associated with a first priority and a second HARQ codebook associated with a second priority, wherein the RRC signaling indicates that the first HARQ codebook is associated with a first sub-slot length for physical uplink control channel (PUCCH) feedback and that the second HARQ codebook is associated with a second sub-slot length for PUCCH feedback;
receiving first downlink control information (DCI), the first DCI scheduling a first physical downlink shared channel (PDSCH) transmission, the first DCI indicating the first priority, wherein first HARQ feedback for the first PDSCH transmission is associated with the first HARQ codebook, and the first HARQ codebook is associated with the first priority;
receiving second DCI, the second DCI scheduling a second PDSCH transmission, the second DCI indicating the second priority, wherein second HARQ feedback for the second PDSCH transmission is associated with the second HARQ codebook, and the second HARQ codebook is associated with the second priority;
determining, based on a first field in the first DCI, a first time for transmitting a first PUCCH transmission comprising the first HARQ feedback for the first PDSCH transmission, the first field indicating a first number of sub-slots according to the first sub-slot length associated with the first HARQ codebook;
determining, based on a second field in the second DCI, a second time for transmitting a second PUCCH transmission comprising the second HARQ feedback for the second PDSCH transmission, the second field indicating a second number of sub-slots according to the second sub-slot length associated with the second HARQ codebook;
determining that the first PUCCH transmission and the second PUCCH transmission at least partially overlap in time; and
transmitting the first PUCCH transmission and cancel at least a portion of the second PUCCH transmission based on the first priority being higher than the second priority.
12. The method of claim 11 , wherein the first DCI comprises a third field, the third field indicating the first priority, and the second DCI comprises a fourth field, the fourth field indicating the second priority.
13. The method of claim 11 , wherein the first field corresponds to a K1 field of the first DCI.
14. The method of claim 13 , wherein, for at least one priority level, the WTRU interprets the K1 field in units of slots.
15. The method of claim 11 , wherein the RRC signaling indicates a first number of symbols for the first sub-slot length for PUCCH feedback and a second number of symbols for the second sub-slot length for PUCCH feedback, wherein the first number of symbols and the second number of symbols are different.
16. The method of claim 11 , wherein the RRC signaling indicates that at least one of the first sub-slot length for PUCCH feedback or the second sub-slot length for PUCCH feedback has a length of half of a slot.
17. The method of claim 11 , wherein the WTRU transmits at least two PUCCH transmissions in a single slot.
18. The method of claim 17 , wherein each of the at least two PUCCH transmissions in a single slot is transmitted in a respective sub-slot of the single slot.
19. The method of claim 11 , wherein the RRC signaling further comprises a first set of one or more PUCCH resources for the first HARQ codebook associated with the first priority, and a second set of one or more PUCCH resources for the second HARQ codebook associated with the second priority.
20. The method of claim 11 , wherein HARQ feedback corresponding to the first HARQ codebook is separately encoded form HARQ feedback corresponding to the second HARQ codebook.