Rate matching for a downlink transmission with multiple transmission configurations

1. A method for wireless communications by a user equipment (UE), comprising:

receiving one downlink control information (DCI) scheduling a physical downlink shared channel (PDSCH) transmission, the DCI indicating two transmission configuration indicator (TCI) states;

determining a resource element (RE) mapping that maps the PDSCH transmission to physical resource blocks (PRBs) separately for each of the two TCI states; and

receiving the PDSCH transmission based on the determination.

2. The method of claim 1 , wherein the two TCI states are associated with separate redundancy versions (RVs).

3. The method of claim 1 , wherein receiving the PDSCH transmission comprises receiving a same transport block (TB) with both TCI states.

4. The method of claim 3 , further comprising:

determining a number of coded bits available for transmission of the TB separately for each of the two TCI states.

5. The method of claim 1 , wherein the two TCI states are associated with different frequency resources.

6. The method of claim 1 , further comprising:

receiving higher layer signaling indicating to determine separate RE mappings for the two TCI states.

7. The method of claim 1 , further comprising:

demodulating the PDSCH transmission for a first TCI state of the two TCI states using a modulation order associated with the first of the two TCI states; and

demodulating the PDSCH transmission for a second TCI state of the two TCI states using the same modulation order associated with the first TCI state of the two TCI states.

8. The method of claim 1 , wherein:

the one DCI indicates a separate set of resource blocks (RBs) associated with the PDSCH transmission for each of the multiple TCI states, a separate set of antenna ports for each of the two TCI states, a separate redundancy version (RV) for each of the multiple TCI states, or both.

9. A method for wireless communications by a base station (BS), comprising:

sending one downlink control information (DCI) scheduling a physical downlink shared channel (PDSCH) transmission, the DCI indicating two transmission configuration indicator (TCI) states;

determining a resource element (RE) mapping that maps the PDSCH transmission to physical resource blocks (PRBs) separately for each of the two TCI states; and

sending the PDSCH transmission based on the determination.

10. The method of claim 9 , wherein the two TCI states are associated with separate redundancy versions (RVs).

11. The method of claim 9 , wherein sending the PDSCH transmission comprises sending a same transport block (TB) with both TCI states.

12. The method of claim 11 , further comprising:

determining a number of coded bits available for transmission of the TB separately for each of the two TCI states.

13. The method of claim 9 , wherein the two TCI states are associated with different frequency resources.

14. The method of claim 9 , further comprising:

sending higher layer signaling to the UE indicating to determine separate RE mappings for the two TCI states.

15. The method of claim 9 , further comprising:

modulating the PDSCH transmission for a first TCI state of the two TCI states using a modulation order associated with the first of the two TCI states; and

modulating the PDSCH transmission for a second TCI state of the two TCI states using the same modulation order associated with the first TCI state of the two TCI states.

16. The method of claim 9 , wherein:

the one DCI indicates a separate set of resource blocks (RBs) associated with the PDSCH transmission for each of the multiple TCI states, a separate set of antenna ports for each of the two TCI states, a separate redundancy version (RV) for each of the multiple TCI states, or both.

17. An apparatus for wireless communications, comprising:

at least one processor coupled with a memory, the memory comprising code executable by the at least one processor to cause the apparatus to:

receive one downlink control information (DCI) scheduling a physical downlink shared channel (PDSCH) transmission, the DCI indicating two transmission configuration indicator (TCI) states;

determine a resource element (RE) mapping that maps the PDSCH transmission to physical resource blocks (PRBs) separately for each of the two TCI states; and

receive the PDSCH transmission based on the determination.

18. The apparatus of claim 17 , wherein the two TCI states are associated with separate redundancy versions (RVs).

19. The apparatus of claim 17 , wherein code executable by the at least one processor to cause the apparatus to receive the PDSCH transmission comprises code executable by the at least one processor to cause the apparatus to receive a same transport block (TB) with both TCI states.

20. The apparatus of claim 19 , further comprising code executable by the at least one processor to cause the apparatus to:

determine a number of coded bits available for transmission of the TB separately for each of the two TCI states.

21. The apparatus of claim 17 , wherein the two TCI states are associated with different frequency resources.

22. The apparatus of claim 17 , further comprising code executable by the at least one processor to cause the apparatus to:

receive higher layer signaling indicating to determine separate RE mappings for the two TCI states.

23. The apparatus of claim 17 , further comprising code executable by the at least one processor to cause the apparatus to:

demodulate the PDSCH transmission for a first TCI state of the two TCI states using a modulation order associated with the first of the two TCI states; and

demodulate the PDSCH transmission for a second TCI state of the two TCI states using the same modulation order associated with the first TCI state of the two TCI states.

24. The apparatus of claim 17 , wherein:

the one DCI indicates a separate set of resource blocks (RBs) associated with the PDSCH transmission for each of the multiple TCI states, a separate set of antenna ports for each of the two TCI states, a separate redundancy version (RV) for each of the multiple TCI states, or both.

25. An apparatus for wireless communications, comprising:

at least one processor coupled with a memory, the memory comprising code executable by the at least one processor to cause the apparatus to:

send one downlink control information (DCI) scheduling a physical downlink shared channel (PDSCH) transmission, the DCI indicating two transmission configuration indicator (TCI) states;

determine a resource element (RE) mapping that maps the PDSCH transmission to physical resource blocks (PRBs) separately for each of the two TCI states; and

send the PDSCH transmission based on the determination.

26. The apparatus of claim 25 , wherein the two TCI states are associated with separate redundancy versions (RVs).

27. The apparatus of claim 25 , wherein the code executable by the at least one processor to cause the apparatus to send the PDSCH transmission comprises code executable by the at least one processor to cause the apparatus to send a same transport block (TB) with both TCI states.

28. The apparatus of claim 27 , further comprising code executable by the at least one processor to cause the apparatus to:

determine a number of coded bits available for transmission of the TB separately for each of the two TCI states.

29. The apparatus of claim 25 , wherein the two TCI states are associated with different frequency resources.

30. The apparatus of claim 25 , further comprising code executable by the at least one processor to cause the apparatus to:

send higher layer signaling to the UE indicating to determine separate RE mappings for the two TCI states.