Waveform optimization of peak-to-average power ratio with inter-cell coordination

1. A method for wireless communication by a first base station, comprising:

transmitting, to a second base station, a measurement configuration for measurement of a plurality of beam resources for a first plurality of peak-to-average power ratio (PAPR) reduction beams;

transmitting, via the plurality of beam resources, a plurality of reference signals via the first plurality of PAPR reduction beams in accordance with the measurement configuration;

receiving a headroom report indicating available headroom based at least in part on an energy measurement reported for the plurality of beam resources by a user equipment (UE) served by the second base station; and

transmitting signals via a second plurality of PAPR reduction beams based at least in part on the headroom report.

2. The method of claim 1 , wherein transmitting the signals via the second plurality of PAPR reduction beams further comprises:

transmitting a signal via at least one PAPR reduction beam of the second plurality of PAPR reduction beams at a different power from a corresponding PAPR reduction beam of the first plurality of PAPR reduction beams based at least in part on the headroom report.

3. The method of claim 1 , wherein each PAPR reduction beam of the first plurality of PAPR reduction beams is transmitted in a respective transmission time interval of a resource allocation, and wherein transmitting the signals via the second plurality of PAPR reduction beams further comprises:

transmitting at least one PAPR reduction beam of the second plurality of PAPR reduction beams in a different transmission time interval within the resource allocation than a corresponding PAPR reduction beam of the first plurality of PAPR reduction beams.

4. The method of claim 1 , further comprising:

determining that the UE is not scheduled to communicate in a resource in which transmission of the signals is scheduled to occur, and wherein transmitting the signals via the second plurality of PAPR reduction beams further comprises; and

transmitting a signal via at least one PAPR reduction beam of the second plurality of PAPR reduction beams with beam characteristics selected to achieve a desired PAPR level based at least in part on the determination.

5. The method of claim 1 , further comprising:

determining an adjustment of at least one PAPR reduction beam of the second plurality of PAPR reduction beams based at least in part on the headroom report.

6. The method of claim 1 , wherein transmitting the signals via the second plurality of PAPR reduction beams further comprises:

transmitting a signal via at least one PAPR reduction beam of the second plurality of PAPR reduction beams in at least a partially overlapping direction with a serving beam based at least in part on the headroom report.

7. The method of claim 1 , further comprising:

determining one or more PAPR reduction beams to be used for transmission of the first plurality of PAPR reduction beams; and

determining the measurement configuration based at least in part on the determined one or more PAPR reduction beams.

8. The method of claim 1 , wherein the headroom report comprises available headroom per beam, per transmission time interval, per frequency sub-band, or a combination thereof, for each of the determined one or more PAPR reduction beams.

9. The method of claim 1 , further comprising:

transmitting the measurement configuration via an integrated access and backhaul (IAB) link.

10. The method of claim 9 , wherein the IAB link is in a same frequency band as at least one PAPR reduction beam of the first plurality of PAPR reduction beams.

11. An apparatus for wireless communication by a first base station, comprising:

a processor,

memory coupled with the processor; and

instructions stored in the memory and executable by the processor to cause the apparatus to:

transmit, to a second base station, a measurement configuration for measurement of a plurality of beam resources for a first plurality of peak-to-average power ratio (PAPR) reduction beams;

transmit, via the plurality of beam resources, a plurality of reference signals via the first plurality of PAPR reduction beams in accordance with the measurement configuration;

receive a headroom report indicating available headroom based at least in part on an energy measurement reported for the plurality of beam resources by a user equipment (UE) served by the second base station; and

transmit signals via a second plurality of PAPR reduction beams based at least in part on the headroom report.

12. The apparatus of claim 11 , further comprising a transmitter, wherein the instructions to transmit the signals via the second plurality of PAPR reduction beams further are executable by the processor to cause the apparatus to:

transmit, via the transmitter, a signal via at least one PAPR reduction beam of the second plurality of PAPR reduction beams at a different power from a corresponding PAPR reduction beam of the first plurality of PAPR reduction beams based at least in part on the headroom report.

13. The apparatus of claim 11 , wherein each PAPR reduction beam of the first plurality of PAPR reduction beams is transmitted in a respective transmission time interval of a resource allocation, and comprises:

transmit at least one PAPR reduction beam of the second plurality of PAPR reduction beams in a different transmission time interval within the resource allocation than a corresponding PAPR reduction beam of the first plurality of PAPR reduction beams.

14. The apparatus of claim 11 , wherein the instructions are further executable by the processor to cause the apparatus to:

determine that the UE is not scheduled to communicate in a resource in which transmission of the signals is scheduled to occur, and wherein transmitting the signals via the second plurality of PAPR reduction beams further comprises; and

transmit a signal via at least one PAPR reduction beam of the second plurality of PAPR reduction beams with beam characteristics selected to achieve a desired PAPR level based at least in part on the determination.

15. The apparatus of claim 11 , wherein the instructions are further executable by the processor to cause the apparatus to:

determine an adjustment of at least one PAPR reduction beam of the second plurality of PAPR reduction beams based at least in part on the headroom report.

16. The apparatus of claim 11 , wherein the instructions to transmit the signals via the second plurality of PAPR reduction beams further are executable by the processor to cause the apparatus to:

transmit a signal via at least one PAPR reduction beam of the second plurality of PAPR reduction beams in at least a partially overlapping direction with a serving beam based at least in part on the headroom report.

17. The apparatus of claim 11 , wherein the instructions are further executable by the processor to cause the apparatus to:

determine one or more PAPR reduction beams to be used for transmission of the first plurality of PAPR reduction beams; and

determine the measurement configuration based at least in part on the determined one or more PAPR reduction beams.

18. The apparatus of claim 11 , wherein the headroom report comprises available headroom per beam, per transmission time interval, per frequency sub-band, or a combination thereof, for each of the determined one or more PAPR reduction beams.

19. The apparatus of claim 11 , wherein the instructions are further executable by the processor to cause the apparatus to:

transmit the measurement configuration via an integrated access and backhaul (IAB) link.

20. The apparatus of claim 19 , wherein the IAB link is in a same frequency band as at least one PAPR reduction beam of the first plurality of PAPR reduction beams.

21. An apparatus for wireless communication by a first base station, comprising:

means for transmitting, to a second base station, a measurement configuration for measurement of a plurality of beam resources for a first plurality of peak-to-average power ratio (PAPR) reduction beams;

means for transmitting, via the plurality of beam resources, a plurality of reference signals via the first plurality of PAPR reduction beams in accordance with the measurement configuration;

means for receiving a headroom report indicating available headroom based at least in part on an energy measurement reported for the plurality of beam resources by a user equipment (UE) served by the second base station; and

means for transmitting signals via a second plurality of PAPR reduction beams based at least in part on the headroom report.

22. The apparatus of claim 21 , wherein the means for transmitting the signals via the second plurality of PAPR reduction beams further comprises:

means for transmitting a signal via at least one PAPR reduction beam of the second plurality of PAPR reduction beams at a different power from a corresponding PAPR reduction beam of the first plurality of PAPR reduction beams based at least in part on the headroom report.

23. The apparatus of claim 21 , wherein each PAPR reduction beam of the first plurality of PAPR reduction beams is transmitted in a respective transmission time interval of a resource allocation, and comprises:

means for transmitting at least one PAPR reduction beam of the second plurality of PAPR reduction beams in a different transmission time interval within the resource allocation than a corresponding PAPR reduction beam of the first plurality of PAPR reduction beams.

24. The apparatus of claim 21 , further comprising:

determining that the UE is not scheduled to communicate in a resource in which transmission of the signals is scheduled to occur, and wherein transmitting the signals via the second plurality of PAPR reduction beams further comprises; and

means for transmitting a signal via at least one PAPR reduction beam of the second plurality of PAPR reduction beams with beam characteristics selected to achieve a desired PAPR level based at least in part on the determination.

25. The apparatus of claim 21 , further comprising:

means for determining an adjustment of at least one PAPR reduction beam of the second plurality of PAPR reduction beams based at least in part on the headroom report.

26. The apparatus of claim 21 , wherein the means for transmitting the signals via the second plurality of PAPR reduction beams further comprises:

means for transmitting a signal via at least one PAPR reduction beam of the second plurality of PAPR reduction beams in at least a partially overlapping direction with a serving beam based at least in part on the headroom report.

27. The apparatus of claim 21 , further comprising:

means for determining one or more PAPR reduction beams to be used for transmission of the first plurality of PAPR reduction beams; and

means for determining the measurement configuration based at least in part on the determined one or more PAPR reduction beams.

28. The apparatus of claim 21 , wherein the headroom report comprises available headroom per beam, per transmission time interval, per frequency sub-band, or a combination thereof, for each of the determined one or more PAPR reduction beams.

29. The apparatus of claim 21 , further comprising:

means for transmitting the measurement configuration via an integrated access and backhaul (IAB) link, wherein the IAB link is in a same frequency band as at least one PAPR reduction beam of the first plurality of PAPR reduction beams.

30. A non-transitory computer-readable medium storing code for wireless communication by a first base station, the code comprising instructions executable by a processor to:

transmit, to a second base station, a measurement configuration for measurement of a plurality of beam resources for a first plurality of peak-to-average power ratio (PAPR) reduction beams;

transmit, via the plurality of beam resources, a plurality of reference signals via the first plurality of PAPR reduction beams in accordance with the measurement configuration;

receive a headroom report indicating available headroom based at least in part on an energy measurement reported for the plurality of beam resources by a user equipment (UE) served by the second base station; and

transmit signals via a second plurality of PAPR reduction beams based at least in part on the headroom report.