Systems and methods for collision handling and semi-persistently scheduled physical downlink shared channel release

1. A method comprising:

receiving, by a physical downlink shared channels (PDSCH) manager of a user equipment comprising a processor and memory, a semi-persistently scheduled (SPS) release physical downlink control channel (PDCCH) in a scheduling cell, the SPS release PDCCH identifying a plurality of SPS PDSCH configuration indices to be released;

identifying, by the PDSCH manager, a slot of a scheduled cell, where the slot of the scheduled cell overlaps with an end of an ending symbol of the SPS release PDCCH;

determining that a timing of the end of the ending symbol of the SPS release PDCCH is before an end of a corresponding ending symbol of one or more SPS PDSCH configuration indices of the plurality of SPS PDSCH configuration indices of the slot; and, in response, releasing the one or more SPS PDSCH configuration indices.

2. The method of claim 1 , wherein an acknowledgement/negative-acknowledge bit (ACK/NACK) of the SPS release PDCCH and an ACK/NACK of one or more SPS PDSCH occasions corresponding to the one or more SPS PDSCH configuration indices are mapped to a same physical uplink control channel (PUCCH).

3. The method of claim 1 , wherein the scheduling cell has a first subcarrier spacing and the scheduled cell has a second subcarrier spacing different from the first subcarrier spacing.

4. The method of claim 3 , wherein the first subcarrier spacing of the scheduling cell is lower than the second subcarrier spacing of the scheduled cell.

5. The method of claim 3 , wherein the first subcarrier spacing of the scheduling cell is higher than the second subcarrier spacing of the scheduled cell.

6. A method comprising:

identifying, by a physical downlink shared channel (PDSCH) manager of a base station comprising a processor and memory, a slot of a scheduled cell that will overlap with the end of an ending symbol of a semi-persistently scheduled (SPS) release physical downlink control channel (PDCCH) identifying a plurality of SPS PDSCH configuration indices to be jointly released;

determining, by the PDSCH manager, that a timing of the end of the ending symbol of the SPS release PDCCH is before an end of a corresponding ending symbol of one or more SPS PDSCH configuration indices of the plurality of SPS PDSCH configuration indices of the slot; and

transmit the SPS release PDCCH.

7. The method of claim 6 , wherein an acknowledgement/negative-acknowledge bit (ACK/NACK) of the SPS release PDCCH and an ACK/NACK of one or more SPS PDSCH occasions corresponding to the one or more SPS PDSCH configuration indices are mapped to a same physical uplink control channel (PUCCH).

8. The method of claim 6 , wherein the scheduling cell has a first subcarrier spacing and the scheduled cell has a second subcarrier spacing different from the first subcarrier spacing.

9. The method of claim 8 , wherein the first subcarrier spacing of the scheduling cell is lower than the second subcarrier spacing of the scheduled cell.

10. The method of claim 8 , wherein the first subcarrier spacing of the scheduling cell is higher than the second subcarrier spacing of the scheduled cell.

11. A method comprising:

receiving, by a physical downlink shared channels (PDSCH) manager of a user equipment comprising a processor and memory, a semi-persistently scheduled (SPS) release physical downlink control channel (PDCCH) in a scheduling cell, the SPS release PDCCH identifying a SPS PDSCH configuration index, the SPS PDSCH configuration index being associated with a SPS PDSCH configured with an aggregation factor in a scheduled cell; and

determining that a timing of an ending symbol of the SPS release PDCCH is before an ending symbol of a last repetition of the SPS PDSCH configured with the aggregation factor and, in response, releasing the SPS PDSCH configuration index.

12. The method of claim 11 , wherein an acknowledgement/negative-acknowledge bit (ACK/NACK) of the SPS release PDCCH and an ACK/NACK of the SPS PDSCH configured with the aggregation factor are mapped to a same physical uplink control channel (PUCCH).

13. The method of claim 11 , wherein the scheduling cell has a first subcarrier spacing and the scheduled cell has a second subcarrier spacing different from the first subcarrier spacing.

14. The method of claim 13 , wherein the first subcarrier spacing of the scheduling cell is lower than the second subcarrier spacing of the scheduled cell.

15. The method of claim 11 , wherein the SPS release PDCCH identifies a plurality of SPS PDSCH configuration indices to be released.

16. A method comprising:

determining, by a PDSCH manager of a base station comprising a processor and memory, that a timing of an ending symbol of a semi-persistently scheduled (SPS) release physical downlink control channel (PDCCH) in a scheduling cell is before a timing of an ending symbol of a last repetition of a released SPS physical downlink shared channel (PDSCH) with aggregation factor in a scheduled cell; and

releasing the released SPS PDSCH with aggregation factor in response to determining that the ending symbol of the SPS release PDCCH is before the ending symbol of the last repetition of the released SPS PDSCH with aggregation factor.

17. The method of claim 16 , wherein an acknowledgement/negative-acknowledge bit (ACK/NACK) of the SPS release PDCCH and an ACK/NACK of the SPS PDSCH configured with the aggregation factor are mapped to a same physical uplink control channel (PUCCH).

18. The method of claim 17 , wherein the scheduling cell has a first subcarrier spacing and the scheduled cell has a second subcarrier spacing different from the first subcarrier spacing.

19. The method of claim 18 , wherein the first subcarrier spacing of the scheduling cell is lower than the second subcarrier spacing of the scheduled cell.

20. The method of claim 16 , wherein the SPS release PDCCH identifies a plurality of SPS PDSCH configuration indices to be released.