Measurements of linear combinations of beams
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may measure one or more linear combinations, of a set of beams, from a radio access network (RAN) node. Accordingly, the UE may transmit a report, based at least in part on measuring the one or more linear combinations, to the RAN node. The one or more linear combinations may be indicated in one or more rules stored in a memory of the UE or may be indicated in a system information block or a radio resource configuration message. Numerous other aspects are described.
1. An apparatus for wireless communication at a user equipment (UE), comprising:
one or more memories; and
one or more processors, coupled to the one or more memories, configured to:
measure a reference signal received power for one or more linear combinations, of a set of beams, from a radio access network (RAN) node;
transmit a channel state information report, based at least in part on the measuring, to the RAN node, the channel state information report comprising:
angular information associated with the one or more linear combinations, and
a spatial signature corresponding to measurement values included in a set of reference signal received power measurements of the one or more linear combinations; and
receive an indication of a beam of the set of beams, to be used by the RAN node wherein the beam to be used by the RAN node is selected using machine learning and the spatial signature.
2. The apparatus of claim 1 , wherein the set of beams comprises synchronization signal block (SSB) beams.
3. The apparatus of claim 1 , wherein the set of beams comprises channel state information-reference signal (CSI-RS) beams.
4. The apparatus of claim 1 , wherein the one or more linear combinations are indicated in one or more rules stored in the one or more memories.
5. The apparatus of claim 1 , wherein the one or more processors are further configured to:
receive an indication of the one or more linear combinations in a system information block (SIB) or a radio resource configuration (RRC) message.
6. The apparatus of claim 5 , wherein the indication comprises one or more quasi-co-location (QCL) indications that associate each linear combination, of the one or more linear combinations, with a plurality of beams of the set of beams.
7. The apparatus of claim 5 , wherein the indication includes a set of coefficients for each linear combination.
8. An apparatus for wireless communication at a radio access network (RAN) node, comprising:
one or more memories; and
one or more processors, coupled to the one or more memories, configured to:
transmit one or more linear combinations of a set of beams;
receive a channel state information report including:
a spatial signature corresponding to measurement values included in a set of reference signal received power measurements of the one or more linear combinations, and
angular information associated with the one or more linear combinations; and
transmit an indication of a beam of the set of beams, to be used by the RAN node wherein the beam to be used by the RAN node is selected using machine learning and the spatial signature.
9. The apparatus of claim 8 , wherein the set of beams comprises synchronization signal block (SSB) beams.
10. The apparatus of claim 8 , wherein the set of beams comprises channel state information-reference signal (CSI-RS) beams.
11. The apparatus of claim 8 , wherein the one or more linear combinations are indicated in one or more rules stored in the one or more memories.
12. The apparatus of claim 8 , wherein the one or more processors are further configured to:
transmit an indication of the one or more linear combinations in a system information block (SIB) or a radio resource configuration (RRC) message.
13. The apparatus of claim 12 , wherein the indication comprises one or more quasi-co-location (QCL) indications that associate each linear combination, of the one or more linear combinations, with a plurality of beams of the set of beams.
14. The apparatus of claim 12 , wherein the indication includes a set of coefficients for each linear combination.
15. A method of wireless communication performed by a user equipment (UE), comprising:
measuring a reference signal received power for one or more linear combinations, of a set of beams, from a radio access network (RAN) node; and
transmitting a channel state information report, based at least in part on the measuring, to the RAN node, the channel state information report comprising:
angular information associated with the one or more linear combinations, and
a spatial signature corresponding to measurement values included in a set of reference signal received power measurements of the one or more linear combinations; and
receiving an indication of a beam of the set of beams, to be used by the RAN node wherein the beam to be used by the RAN node is selected using machine learning and the spatial signature.
16. The method of claim 15 , wherein the set of beams comprises synchronization signal block (SSB) beams.
17. The method of claim 15 , wherein the set of beams comprises channel state information-reference signal (CSI-RS) beams.
18. The method of claim 15 , wherein the one or more linear combinations are indicated in one or more rules stored in one or more memories of the UE.
19. The method of claim 15 , further comprising:
receiving an indication of the one or more linear combinations in a system information block (SIB) or a radio resource configuration (RRC) message.
20. The method of claim 19 , wherein the indication comprises one or more quasi-co-location (QCL) indications that associate each linear combination, of the one or more linear combinations, with a plurality of beams of the set of beams.
21. The method of claim 19 , wherein the indication includes a set of coefficients for each linear combination.
22. A method of wireless communication performed by a radio access network (RAN) node, comprising:
transmitting one or more linear combinations of a set of beams;
receiving a channel state information report including:
a spatial signature corresponding to measurement values included in a set of reference signal received power measurements of the one or more linear combinations, and
angular information associated with the one or more linear combinations; and
transmitting an indication of a beam of the set of beams, to be used by the RAN node, wherein the beam to be used by the RAN node is selected using machine learning and the spatial signature.
23. The method of claim 22 , further comprising:
transmitting an indication of the one or more linear combinations in a system information block (SIB) or a radio resource configuration (RRC) message.
24. The method of claim 23 , wherein the indication comprises one or more quasi-co-location (QCL) indications that associate each linear combination, of the one or more linear combinations, with a plurality of beams of the set of beams.
25. The method of claim 23 , wherein the indication includes a set of coefficients for each linear combination.