Multi-transmission and reception point operation
Supporting transmission of multiple hybrid automatic repeat request acknowledgments (HARQ-ACKS) within a single slot may include encoding a first HARQ-ACK and a second HARQ-ACK within the single slot for transmission to a base station. The first HARQ-ACK may be transmitted via a first physical uplink control channel (PUCCH) and the second HARQ-ACK may be transmitted via a second PUCCH. Based on encoding the first HARQ-ACK and the second HARQ-ACK within the single slot, one or more additional uplink (UL) signals colliding with at least one of the first HARQ-ACK and the second HARQ-ACK within the single slot may be responded to based on a configuration of the UE.
1. A non-transitory computer-readable storage medium, the non-transitory computer-readable storage medium including instructions that when executed by one or more processors of a user equipment (UE), cause the one or more processors to:
decode a first downlink (DL) signal received via physical downlink control channel (PDCCH) from a scheduling cell, wherein decoding includes determining a multi-transmission and reception point (MTRP) configuration for both the scheduling cell and a scheduled cell scheduled by the scheduling cell;
based at least partially on the MTRP configuration of either or both of the scheduling cell and the scheduled cell, determine a default transmission configuration indicator (TCI) for cross carrier scheduling (CCS) with MTRP; and
decode a second DL signal received via physical downlink shared channel (PDSCH) corresponding to the first DL signal received via the PDCCH utilizing the default TCI.
2. The non-transitory computer-readable storage medium of claim 1 , wherein when the default TCI is based at least partially on the MTRP configuration of the scheduling cell, the default TCI comprises a control resource set (CORESET), in a most recent PDCCH monitoring slot, having a lowest identification (ID) and a CORESETPoolIndex value that comprises a same value as a CORESETPoolIndex value of a scheduling downlink control information (DCI).
3. The non-transitory computer-readable storage medium of claim 1 , wherein determining the default TCI is based at least partially on a downlink control information (DCI) MTRP configuration of the scheduled cell.
4. The non-transitory computer-readable storage medium of claim 3 , wherein when the MTRP configuration of the scheduled cell supports multi-DCI MTRP, the default TCI comprises a control resource set (CORESET), in a most recent PDCCH monitor slot, having a lowest identification (ID) and a CORESETPoolIndex value that comprises a same value as a CORESETPoolIndex value of a scheduling DCI.
5. The non-transitory computer-readable storage medium of claim 3 , wherein when the MTRP configuration of the scheduled cell does not support multi-DCI MTRP, the default TCI further comprises:
a control resource set (CORESET) having a lowest identification (ID) in a most recent PDCCH monitor slot; or
an activated PDSCH TCI with a lowest index in the scheduled cell.
6. The non-transitory computer-readable storage medium of claim 1 , wherein when the MTRP configuration of the scheduled cell and the scheduling cell both support single-downlink control information (DCI) MTRP, the default TCI comprises an activated TCI codepoint for the PDSCH with a lowest identification (ID) that has two TCI states in the scheduling cell.
7. The non-transitory computer-readable storage medium of claim 1 , wherein when the MTRP configuration of the scheduled cell and the scheduling cell both support single-downlink control information (DCI) MTRP, the default TCI comprises an activated TCI codepoint for the PDSCH with a lowest identification (ID) that has two TCI states in the scheduled cell.
8. The non-transitory computer-readable storage medium of claim 1 , wherein when the MTRP configuration of the scheduled cell and the scheduling cell both support single-downlink control information (DCI) MTRP, and neither a first activated TCI codepoint for the PDSCH in the scheduled cell nor a second activated TCI codepoint for the PDSCH in the scheduling cell includes two TCI states, the default TCI comprises:
the first activated TCI codepoint for the PDSCH in the scheduled cell or the second activated TCI codepoint for the PDSCH in the scheduling cell that has a first lowest identification (ID);
a control resource set (CORESET) having a second lowest ID; or
a CORESET having a third lowest ID in a latest PDCCH monitor slot.
9. A method for wireless communications by a user equipment (UE), comprising:
decoding a first downlink (DL) signal received via physical downlink control channel (PDCCH) from a scheduling cell, wherein decoding includes determining a multi-transmission and reception point (MTRP) configuration for both the scheduling cell and a scheduled cell scheduled by the scheduling cell;
based at least partially on the MTRP configuration of either or both of the scheduling cell and the scheduled cell, determining a default transmission configuration indicator (TCI) for cross carrier scheduling (CCS) with MTRP; and
decoding a second DL signal received via physical downlink shared channel (PDSCH) corresponding to the first DL signal received via the PDCCH utilizing the default TCI.
10. The method of claim 9 , wherein when the default TCI is based at least partially on the MTRP configuration of the scheduling cell, the default TCI comprises a control resource set (CORESET), in a most recent PDCCH monitoring slot, having a lowest identification (ID) and a CORESETPoolIndex value that comprises a same value as a CORESETPoolIndex value of a scheduling downlink control information (DCI).
11. The method of claim 9 , wherein determining the default TCI is based at least partially on a downlink control information (DCI) MTRP configuration of the scheduled cell.
12. The method of claim 11 , wherein when the MTRP configuration of the scheduled cell supports multi-DCI MTRP, the default TCI comprises a control resource set (CORESET), in a most recent PDCCH monitoring slot, having a lowest identification (ID) and a CORESETPoolIndex value that comprises a same value as a CORESETPoolIndex value of a scheduling DCI.
13. The method of claim 11 , wherein when the MTRP configuration of the scheduled cell does not support multi-DCI MTRP, the default TCI further comprises:
a control resource set (CORESET) having a lowest identification (ID) in a most recent PDCCH monitoring slot; or
an activated PDSCH TCI with a lowest index in the scheduled cell.
14. The method of claim 9 , wherein when the MTRP configuration of the scheduled cell and the scheduling cell both support single-downlink control information (DCI) MTRP, the default TCI comprises an activated TCI codepoint for the PDSCH with a lowest identification (ID) that has two TCI states in the scheduling cell.
15. The method of claim 9 , wherein when the MTRP configuration of the scheduled cell and the scheduling cell both support single-downlink control information (DCI) MTRP, the default TCI comprises an activated TCI codepoint for the PDSCH with a lowest identification (ID) that has two TCI states in the scheduled cell.
16. The method of claim 9 , wherein when the MTRP configuration of the scheduled cell and the scheduling cell both support single-downlink control information (DCI) MTRP, and neither a first activated TCI codepoint for the PDSCH in the scheduled cell nor a second activated TCI codepoint for the PDSCH in the scheduling cell includes two TCI states, the default TCI comprises:
the first activated TCI codepoint for the PDSCH in the scheduled cell or the second activated TCI codepoint for the PDSCH in the scheduling cell that has a first lowest identification (ID);
a control resource set (CORESET) having a second lowest ID; or
a CORESET having a third lowest ID in a latest PDCCH monitoring slot.
17. An apparatus of a user equipment (UE), the apparatus comprising:
a memory to store a multi-transmission and reception point (MTRP) configuration; and
one or more processors to:
decode a first downlink (DL) signal received via physical downlink control channel (PDCCH) from a scheduling cell, wherein decoding includes determining the MTRP configuration for both the scheduling cell and a scheduled cell scheduled by the scheduling cell;
based at least partially on the MTRP configuration of either or both of the scheduling cell and the scheduled cell, determine a default transmission configuration indicator (TCI) for cross carrier scheduling (CCS) with MTRP; and
decode a second DL signal received via physical downlink shared channel (PDSCH) corresponding to the first DL signal received via the PDCCH utilizing the default TCI.
18. The apparatus of claim 17 , wherein when the default TCI is based at least partially on the MTRP configuration of the scheduling cell, the default TCI comprises a control resource set (CORESET), in a most recent PDCCH monitoring slot, having a lowest identification (ID) and a CORESETPoolIndex value that comprises a same value as a CORESETPoolIndex value of a scheduling downlink control information (DCI).
19. The apparatus of claim 17 , wherein determining the default TCI is based at least partially on a downlink control information (DCI) MTRP configuration of the scheduled cell.
20. The apparatus of claim 19 , wherein when the MTRP configuration of the scheduled cell supports multi-DCI MTRP, the default TCI comprises a control resource set (CORESET), in a most recent PDCCH monitor slot, having a lowest identification (ID) and a CORESETPoolIndex value that comprises a same value as a CORESETPoolIndex value of a scheduling DCI.