Techniques for transmitting and receiving downlink control information for a set of NOMA downlink transmissions
Techniques are described for wireless communication. A first method includes receiving downlink control information for a first UE based at least in part on a group identifier associated with a NOMA group including the first UE and at least a second UE; and receiving a set of NOMA downlink transmissions at the first UE based at least in part on the downlink control information for the first UE. A second method includes receiving downlink control information for a first UE, the downlink control information for the first UE including an indication of at least a second UE; receiving downlink control information for the second UE based at least in part on the indication of at least the second UE; and receiving a set of NOMA downlink transmissions at the first UE based at least in part on the downlink control information for the first UE and the downlink control information for the second UE.
1. A method for wireless communication, comprising:
encoding downlink control information for a first user equipment (UE) and a second UE based at least in part on a group identifier and a first UE identifier assigned to the first UE, the group identifier associated with a non-orthogonal multiple access (NOMA) group comprising the first UE and at least the second UE;
transmitting a first control channel element for the first UE, the first control channel element comprising downlink control information for the first UE and downlink control information for the second UE, wherein the downlink control information for the second UE comprises a duplicated payload of a second control channel element for the second UE; and
transmitting a set of NOMA downlink transmissions to the first UE based at least in part on the downlink control information for the first UE and the second UE.
2. The method of claim 1 , wherein the downlink control information for the first UE is encoded based at least in part on a deterministic function of the group identifier and the first UE identifier.
3. The method of claim 1 , wherein the downlink control information for the first UE references the first UE identifier.
4. The method of claim 3 , further comprising:
indicating, in the set of NOMA downlink transmissions, a first downlink transmission for the first UE using a first radio network temporary identifier (RNTI) based at least in part on the first UE identifier.
5. The method of claim 3 , wherein the first RNTI is based at least in part on a deterministic function of the first UE identifier and the group identifier.
6. The method of claim 1 , further comprising:
transmitting downlink control information for the second UE based at least in part on the group identifier associated with the NOMA group.
7. The method of claim 6 , wherein transmitting the downlink control information for the second UE is based at least in part on a deterministic function of the group identifier and a second UE identifier assigned to the second UE.
8. The method of claim 1 , further comprising:
indicating, based at least in part on the downlink control information for the first UE and the downlink control information for the second UE, that an interfering transmission overlaps a downlink transmission for the first UE.
9. The method of claim 8 , further comprising:
triggering an interference cancellation operation on the interfering transmission at the first UE based at least in part on the downlink control information for the second UE.
10. The method of claim 9 , wherein the downlink control information for the second UE references a second UE identifier assigned to the second UE, and wherein the interference cancellation operation uses a second radio network temporary identifier (RNTI) based at least in part on the second UE identifier.
11. The method of claim 10 , wherein the second RNTI is based at least in part on a deterministic function of the second UE identifier and the group identifier.
12. The method of claim 1 , wherein transmitting the downlink control information for the second UE comprises:
transmitting all downlink control information associated with the NOMA group based at least in part on the group identifier.
13. The method of claim 1 , further comprising:
providing an indication of the second UE in the downlink control information for the first UE; and wherein transmitting the set of NOMA downlink transmissions is based at least in part on the downlink control information for the second UE.
14. An apparatus for wireless communication, comprising:
a processor;
memory coupled to the processor, wherein the processor is configured to execute code stored in the memory to cause the apparatus to:
encode downlink control information for a first user equipment (UE) and a second UE based at least in part on a group identifier and a first UE identifier assigned to the first UE, the group identifier associated with a non-orthogonal multiple access (NOMA) group comprising the first UE and at least the second UE;
transmit a first control channel element for the first UE, the first control channel element comprising downlink control information for the first UE and downlink control information for the second UE, wherein the downlink control information for the second UE comprises a duplicated payload of a second control channel element for the second UE; and
transmit a set of NOMA downlink transmissions to the first UE based at least in part on the downlink control information for the first UE and the second UE.
15. The apparatus of claim 14 , wherein the downlink control information for the first UE is encoded based at least in part on a deterministic function of the group identifier and the first UE identifier.
16. The apparatus of claim 14 , wherein the downlink control information for the first UE references the first UE identifier.
17. The apparatus of claim 16 , wherein the processor is further configured to cause the apparatus to:
indicate, in the set of NOMA downlink transmissions, a first downlink transmission for the first UE using a first radio network temporary identifier (RNTI) based at least in part on the first UE identifier.
18. The apparatus of claim 14 , wherein the processor is configured to cause the apparatus to:
transmit downlink control information for the second UE based at least in part on the group identifier associated with the NOMA group.
19. The apparatus of claim 14 , wherein the processor is configured to cause the apparatus to:
indicate, based at least in part on the downlink control information for the first UE and the downlink control information for the second UE, that an interfering transmission overlaps a downlink transmission for the first UE.
20. The apparatus of claim 19 , wherein the processor is configured to cause the apparatus to:
trigger an interference cancellation operation on the interfering transmission at the first UE based at least in part on the downlink control information for the second UE.
21. The apparatus of claim 20 , wherein the downlink control information for the second UE references a second UE identifier assigned to the second UE.
22. The apparatus of claim 14 , wherein the processor is further configured to cause the apparatus to:
provide an indication of the second UE in the downlink control information for the first UE; and wherein
transmitting the set of NOMA downlink transmissions is based at least in part on the downlink control information for the second UE.
23. The apparatus of claim 21 , wherein the interference cancellation operation uses a second radio network temporary identifier (RNTI) based at least in part on the second UE identifier.
24. The apparatus of claim 23 , wherein the second RNTI is based at least in part on a deterministic function of the second UE identifier and the group identifier.
25. An apparatus for wireless communication, comprising:
means for encoding downlink control information for a first user equipment (UE) and a second UE based at least in part on a group identifier and a first UE identifier assigned to the first UE, the group identifier associated with a non-orthogonal multiple access (NOMA) group comprising the first UE and at least the second UE;
means for transmitting a first control channel element for the first UE, the first control channel element comprising downlink control information for the first UE and downlink control information for the second UE, wherein the downlink control information for the second UE comprises a duplicated payload of a second control channel element for the second UE; and
means for transmitting a set of NOMA downlink transmissions to the first UE based at least in part on the downlink control information for the first UE and the second UE.
26. The apparatus of claim 25 , wherein the downlink control information for the first UE is encoded based at least in part on a deterministic function of the group identifier and the first UE identifier.
27. The apparatus of claim 25 , wherein the downlink control information for the first UE references the first UE identifier.
28. The apparatus of claim 25 , further comprising:
means for transmitting downlink control information for the second UE based at least in part on the group identifier associated with the NOMA group.
29. The apparatus of claim 25 , wherein transmitting the downlink control information for the second UE is based at least in part on a deterministic function of the group identifier and a second UE identifier assigned to the second UE.
30. A non-transitory computer-readable medium for storing instructions executable by a processor, comprising:
instructions to encode downlink control information for a first user equipment (UE) and a second UE based at least in part on a group identifier and a first UE identifier assigned to the first UE, the group identifier associated with a non-orthogonal multiple access (NOMA) group comprising the first UE and at least the second UE; and
instructions to transmit a first control channel element for the first UE, the first control channel element comprising downlink control information for the first UE and downlink control information for the second UE, wherein the downlink control information for the second UE comprises a duplicated payload of a second control channel element for the second UE; and
instructions to transmit a set of NOMA downlink transmissions to the first UE based at least in part on the downlink control information for the first UE and the second UE.