Method and apparatus for physical downlink shared channel (PDSCH) hybrid automatic repeat request (HARQ)-acknowledgement (ACK) feedback in wireless communication
A user equipment (UE) associated with a wireless communication system is disclosed. The UE comprises a processor configured to receive a first downlink control information (DCI) for scheduling a first physical downlink shared channel (PDSCH). The first DCI includes a non-numerical (NN) value of K1 for hybrid automatic repeat request (HARQ)-ACK feedback. The processor is further configured to determine a first priority class associated with the first PDSCH, and determine K1 value and priority class associated with one or more subsequent PDSCH received from the BS, until a selected PDSCH having a numerical K1 value and a same priority class as the first priority class is identified. Further, the processor is configured to provide HARQ-ACK feedback associated with the first PDSCH using a PUCCH/PUSCH occasion indicated by a second DCI scheduling the selected PDSCH.
1. A baseband (BB) processor of a user equipment (UE) configured to perform operations comprising:
receiving a first downlink control information (DCI) for scheduling a first physical downlink shared channel (PDSCH), from a base station (BS), wherein the first DCI indicates a non-numerical (NN) time delay for a first hybrid automatic repeat request (HARQ)-ACK feedback associated with the first PDSCH;
receiving the first PDSCH from the BS based on the first DCI;
determining a first priority class associated with the first PDSCH;
determining time delay and priority class associated with one or more subsequent PDSCH received from the BS, until a second PDSCH having a numerical time delay for a second HARQ-ACK feedback and a same priority class as the first priority class is identified; and
providing the first HARQ-ACK feedback for transmission using a physical uplink control channel (PUCCH) occasion or a physical uplink shared channel (PUSCH) occasion indicated by a second DCI scheduling the second PDSCH.
2. The BB processor of claim 1 , wherein the first DCI further indicates the first priority class.
3. The BB processor of claim 1 , wherein the first priority class and the priority class associated with the one or more subsequent PDSCH are preconfigured and received at the UE via radio resource control (RRC) signaling from the BS.
4. The BB processor of claim 1 , wherein the time delay associated with the one or more subsequent PDSCH is included as part of one or more subsequent DCI respectively associated with the one or more subsequent PDSCH, and wherein the operations further comprise determining the time delay associated with the one or more subsequent PDSCH based on processing the one or more subsequent DCI.
5. The BB processor of claim 4 , wherein the one or more subsequent DCI further indicates the priority class associated with the one or more subsequent PDSCH, and wherein the operations further comprise determining the priority class associated with the one or more subsequent PDSCH based on processing the one or more subsequent DCI.
6. The BB processor of claim 1 , wherein the NN time delay is included in a PDSCH-to-HARQ_feedback timing indicator field associated with the first DCI.
7. The BB processor of claim 1 , wherein the NN time delay and the numerical time delay are indicated in slots.
8. The BB processor of claim 1 , wherein the second HARQ-ACK feedback associated with the second PDSCH is sent on the PUCCH occasion or the PUSCH occasion indicated by the second DCI.
9. A baseband (BB) processor of a base station (BS) configured to perform operations comprising:
sending a first downlink control information (DCI) for scheduling a first physical downlink shared channel (PDSCH) having a first priority class to a user equipment (UE), wherein the first DCI includes a non-numerical (NN) time delay for a first hybrid automatic repeat request (HARQ)-ACK feedback associated with the first PDSCH;
sending the first PDSCH to the UE;
sending one or more subsequent PDSCHs to the UE, wherein a second PDSCH of the one or more subsequent PDSCHs comprises a numerical time delay for a second HARQ-ACK feedback and a same priority class as the first priority class; and
receiving the first HARQ-ACK feedback associated with the first PDSCH from the UE, wherein the first HARQ-ACK feedback associated with the first PDSCH is received on a physical uplink control channel (PUCCH) occasion or a physical uplink shared channel (PUSCH) occasion indicated by a second DCI scheduling the second PDSCH.
10. The BB processor of claim 9 , wherein the first DCI further includes information of the first priority class.
11. The BB processor of claim 9 , wherein the first priority class and priority class associated with the one or more subsequent PDSCH are provided to the UE via radio resource control (RRC) signaling.
12. The BB processor of claim 9 , wherein the NN time delay is included in a PDSCH-to-HARQ_feedback timing indicator field associated with the first DCI.
13. The BB processor of claim 9 , wherein the NN time delay and the numerical time delay are indicated in slots.
14. The BB processor of claim 9 , wherein the second HARQ-ACK feedback associated with the second PDSCH is sent on the PUCCH occasion or the PUSCH occasion indicated by the second DCI.
15. A method to perform operations comprising:
receiving a first downlink control information (DCI) for scheduling a first physical downlink shared channel (PDSCH), from a base station (BS), wherein the first DCI includes a non-numerical (NN) K1 value for a first hybrid automatic repeat request (HARQ)-ACK feedback associated with the first PDSCH, wherein K1 value indicates a time delay between a PDSCH and a HARQ-ACK feedback associated therewith;
receiving the first PDSCH from the BS;
determining a first priority class associated with the first PDSCH;
determining K1 value and priority class associated with one or more subsequent PDSCH received from the BS, until a selected PDSCH having a numerical K1 value and a same priority class as the first priority class is identified; and
sending the first HARQ-ACK feedback using a physical uplink control channel (PUCCH) occasion or a physical uplink shared channel (PUSCH) occasion indicated by a second DCI scheduling the selected PDSCH.
16. The method of claim 15 , wherein the first DCI further includes information of the first priority class associated with the first PDSCH, and wherein the operations further comprise determining the first priority class based on processing the first DCI.
17. The method of claim 15 , wherein the first priority class associated with the first PDSCH and the priority class associated with the one or more subsequent PDSCH are preconfigured and received at the UE via radio resource control (RRC) signaling from the BS.
18. The method of claim 15 , wherein the K1 value associated with the one or more subsequent PDSCH are included as part of one or more subsequent DCI respectively associated with the one or more subsequent PDSCH, and wherein the operations further comprise determining the K1 value associated with the one or more subsequent PDSCH, based on processing the one or more subsequent DCI.
19. The method of claim 18 , wherein the one or more subsequent DCI further includes information of the priority class associated with the one or more subsequent PDSCH, and wherein the operations further comprise determining the priority class associated with the one or more subsequent PDSCH based on processing the one or more subsequent DCI.
20. The method of claim 15 , wherein the operations further comprise sending the second HARQ-ACK feedback on the PUCCH occasion or the PUSCH occasion indicated by the second DCI.