Measurement reporting with delta values
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive, from a first transmit-receive point (TRP), a first channel state information reference signal (CSI-RS) associated with the first TRP and a first beam. The UE may receive, from the first TRP or a second TRP, a second CSI-RS associated with the first TRP or the second TRP, wherein the second CSI-RS is associated with a second beam. The UE may transmit, to the first TRP or the second TRP, an indication of a delta value between a measurement of the first CSI-RS and a measurement of the second CSI-RS. 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:
receive, from a first transmit-receive point (TRP), a first channel state information reference signal (CSI-RS) associated with the first TRP and a first beam;
receive, from the first TRP or a second TRP, a second CSI-RS associated with the first TRP or the second TRP, wherein the second CSI-RS is associated with a second beam; and
transmit, to the first TRP or to the second TRP, an indication of a difference between a measurement of the first CSI-RS and a measurement of the second CSI-RS.
2. The apparatus of claim 1 , wherein the one or more processors are further configured to transmit, to the first TRP, an indication of a measurement of the first CSI-RS, wherein a link associated with the first CSI-RS corresponds to a reference link, and the difference is relative to the measurement of the first CSI-RS associated with the reference link.
3. The apparatus of claim 1 , wherein the difference is relative to an inferred measurement associated with a downlink channel between the UE and the first TRP or the second TRP.
4. The apparatus of claim 1 , wherein the one or more processors are further configured to:
add or remove beams for the UE based at least in part on the difference.
5. The apparatus of claim 1 , wherein the difference between the measurement of the first CSI-RS and the measurement of the second CSI-RS is a difference between a reference signal received power (RSRP) associated with the first CSI-RS and an RSRP associated with the second CSI-RS.
6. The apparatus of claim 1 , wherein the difference between the measurement of the first CSI-RS and the measurement of the second CSI-RS is a difference between a reference signal received quality (RSRQ) associated with the first CSI-RS and an RSRQ associated with the second CSI-RS.
7. The apparatus of claim 1 , wherein the difference between the measurement of the first CSI-RS and the measurement of the second CSI-RS is a difference between a signal-to-interference-and-noise ratio (SINR) associated with the first CSI-RS and an SINR associated with the second CSI-RS.
8. The apparatus of claim 1 , wherein the difference between the measurement of the first CSI-RS and the measurement of the second CSI-RS is a difference between a modulation and coding scheme (MCS) associated with the first CSI-RS and an MCS associated with the second CSI-RS.
9. The apparatus of claim 1 , wherein the difference between the measurement of the first CSI-RS and the measurement of the second CSI-RS is a difference between a log likelihood ratio (LLR) associated with the first CSI-RS and an LLR associated with the second CSI-RS.
10. The apparatus of claim 1 , wherein the difference corresponds to a delta of mean values associated with the measurement of the first CSI-RS and mean values associated with the measurement of the second CSI-RS.
11. The apparatus of claim 1 , wherein the difference corresponds to a delta of standard deviation values associated with the measurement of the first CSI-RS and standard deviation values associated with the measurement of the second CSI-RS.
12. The apparatus of claim 1 , wherein the difference corresponds to a delta of highest or lowest values associated with the measurement of the first CSI-RS and highest or lowest values associated with the measurement of the second CSI-RS.
13. An apparatus for wireless communication at a first transmit-receive point (TRP), comprising:
one or more memories; and
one or more processors, coupled to the one or more memories, configured to:
transmit, to a user equipment (UE), a first channel state information reference signal (CSI-RS) associated with the first TRP and a first beam; and
receive, from the UE, an indication of a difference between a measurement of the first CSI-RS and a measurement of a second CSI-RS, wherein the second CSI-RS is associated with the first TRP or a second TRP, and the second CSI-RS is associated with a second beam.
14. The apparatus of claim 13 , wherein the one or more processors are further configured to receive, from the UE, an indication of a measurement of the first CSI-RS, wherein a link associated with the first CSI-RS corresponds to a reference link, and the difference is relative to the measurement of the first CSI-RS associated with the reference link.
15. The apparatus of claim 13 , wherein the difference is relative to an inferred measurement associated with a downlink channel between the UE and the first TRP or the second TRP.
16. The apparatus of claim 13 , wherein the difference between the measurement of the first CSI-RS and the measurement of the second CSI-RS is a difference between a reference signal received power (RSRP) associated with the first CSI-RS and an RSRP associated with the second CSI-RS.
17. The apparatus of claim 13 , wherein the difference between the measurement of the first CSI-RS and the measurement of the second CSI-RS is a difference between a reference signal received quality (RSRQ) associated with the first CSI-RS and an RSRQ associated with the second CSI-RS.
18. The apparatus of claim 13 , wherein the difference between the measurement of the first CSI-RS and the measurement of the second CSI-RS is a difference between a signal-to-interference-and-noise ratio (SINR) associated with the first CSI-RS and an SINR associated with the second CSI-RS.
19. The apparatus of claim 13 , wherein the difference between the measurement of the first CSI-RS and the measurement of the second CSI-RS is a difference between a modulation and coding scheme (MCS) associated with the first CSI-RS and an MCS associated with the second CSI-RS.
20. The apparatus of claim 13 , wherein the difference between the measurement of the first CSI-RS and the measurement of the second CSI-RS is a difference between a log likelihood ratio (LLR) associated with the first CSI-RS and an LLR associated with the second CSI-RS.
21. The apparatus of claim 13 , wherein the difference corresponds to a delta of mean values associated with the measurement of the first CSI-RS and mean values associated with the measurement of the second CSI-RS.
22. The apparatus of claim 13 , wherein the difference corresponds to a delta of standard deviation values associated with the measurement of the first CSI-RS and standard deviation values associated with the measurement of the second CSI-RS.
23. The apparatus of claim 13 , wherein the difference corresponds to a delta of highest or lowest values associated with the measurement of the first CSI-RS and highest or lowest values associated with the measurement of the second CSI-RS.
24. A method of wireless communication performed by a user equipment (UE), comprising:
receiving, from a first transmit-receive point (TRP), a first channel state information reference signal (CSI-RS) associated with the first TRP and a first beam;
receiving, from the first TRP or a second TRP, a second CSI-RS associated with the first TRP or the second TRP, wherein the second CSI-RS is associated with a second beam; and
transmitting, to the first TRP or to the second TRP, an indication of a difference between a measurement of the first CSI-RS and a measurement of the second CSI-RS.
25. The method of claim 24 , further comprising: transmitting, to the first TRP, an indication of a measurement of the first CSI-RS, wherein a link associated with the first CSI-RS corresponds to a reference link, and the difference is relative to the measurement of the first CSI-RS associated with the reference link.
26. The method of claim 24 , wherein the difference is relative to an inferred measurement associated with a downlink channel between the UE and the first TRP or the second TRP.
27. The method of claim 24 , wherein the difference between the measurement of the first CSI-RS and the measurement of the second CSI-RS is a difference between a reference signal received power (RSRP) associated with the first CSI-RS and an RSRP associated with the second CSI-RS.
28. A method of wireless communication performed by a first transmit-receive point (TRP), comprising:
transmitting, to a user equipment (UE), a first channel state information reference signal (CSI-RS) associated with the first TRP and a first beam; and
receiving, from the UE, an indication of a difference between a measurement of the first CSI-RS and a measurement of a second CSI-RS, wherein the second CSI-RS is associated with the first TRP or a second TRP, and the second CSI-RS is associated with a second beam.
29. The method of claim 28 , further comprising: receiving, from the UE, an indication of a measurement of the first CSI-RS, wherein a link associated with the first CSI-RS corresponds to a reference link, and the difference is relative to the measurement of the first CSI-RS associated with the reference link.
30. The method of claim 28 , wherein the difference between the measurement of the first CSI-RS and the measurement of the second CSI-RS is a difference between a reference signal received power (RSRP) associated with the first CSI-RS and an RSRP associated with the second CSI-RS.