Power control techniques for ultra-wide bandwidth beamforming systems

1. A method for wireless communication at a user equipment (UE), comprising:

identifying a plurality of frequency sub-bands for communications with an access network entity and a first frequency sub-band of the plurality of frequency sub-bands as a measurement sub-band;

measuring, responsive to the identifying, at least a first reference signal on the first frequency sub-band;

setting a first transmission power for the first frequency sub-band and a second transmission power for a second frequency sub-band of the plurality of frequency sub-bands based at least in part on the measuring the first reference signal on the first frequency sub-band wherein one or more measurements of the first reference signal are used to estimate one or more power parameters associated with the second transmission power; and

transmitting, at the second transmission power, one or more uplink communications to the access network entity on the second frequency sub-band.

2. The method of claim 1 , further comprising:

determining a first path loss of the first frequency sub-band based at least in part on the measuring the first reference signal; and

determining an estimated path loss for at least the second frequency sub-band based at least in part on the first path loss of the first frequency sub-band.

3. The method of claim 1 , wherein the one or more uplink communications include one or more of an uplink shared channel communication, an uplink control channel communication, a sounding reference signal communication, or any combinations thereof, that are scheduled on the second frequency sub-band.

4. The method of claim 1 , wherein:

the first frequency sub-band is in a first subset of the plurality of frequency sub-bands that are measurement sub-bands, and the second frequency sub-band is in a second subset of the plurality of frequency sub-bands that is non-overlapping with the first subset of frequency sub-bands, and

wherein measurements associated with the first frequency sub-band are used to estimate one or more power parameters for the second frequency sub-band and measurements associated with a third frequency sub-band of the first subset of frequency sub-bands are used to estimate one or more power parameters for a fourth frequency sub-band of the second subset of frequency sub-bands.

5. The method of claim 1 , further comprising:

determining a first path loss compensation parameter for the first frequency sub-band and a second path loss compensation parameter for the second frequency sub-band based at least in part on one or more measurements of the first reference signal.

6. The method of claim 1 , further comprising:

initiating a plurality of closed-loop power control processes that are each associated with a respective frequency sub-band of the plurality of frequency sub-bands, and wherein a transmit power of each of the plurality of frequency sub-bands is set based at least in part on the corresponding closed-loop power control process.

7. The method of claim 6 , wherein the UE accumulates received transmit power control (TPC) commands into the closed-loop power control process associated with the frequency sub-band in which an uplink communication is scheduled.

8. The method of claim 7 , wherein the received TPC commands include an indication of one or more of the plurality of closed-loop power control processes to which the TPC command is to be applied.

9. The method of claim 8 , wherein the indication in the TPC commands indicates, based at least in part on the frequency sub-band in which the TPC command is received, that an associated TPC is to be applied to each of the plurality of closed-loop power control processes, to a subset of the plurality of closed-loop power control processes, or to one or more default closed-loop power control processes.

10. The method of claim 1 , further comprising:

determining a second uplink shared channel power for the second frequency sub-band based at least in part on a first uplink shared channel power for an uplink communication in the first frequency sub-band; and

reporting a power headroom to the access network entity for the second frequency sub-band based at least in part on the determined second uplink shared channel power.

11. The method of claim 10 , wherein the second uplink shared channel power is determined based at least in part on a set of configured default parameters and the first uplink shared channel power for the uplink communication in the first frequency sub-band.

12. The method of claim 11 , wherein the second uplink shared channel power is determined based at least in part on a resource allocation of the uplink communication in the first frequency sub-band being applied to the second frequency sub-band.

13. A method for wireless communication at an access network entity, comprising:

transmitting configuration information to a user equipment (UE) for communications over a plurality of frequency sub-bands that includes a first subset of frequency sub-bands and a second subset of frequency sub-bands that is non-overlapping with the first subset of frequency sub-bands, wherein the first subset of frequency sub-bands are measurement sub-bands and one or more reference signals transmitted in the first subset of frequency sub-bands are to be used at the UE for transmission power control on the second subset of frequency sub-bands;

transmitting a first reference signal on a first frequency sub-band of the first subset of frequency sub-bands; and

receiving one or more uplink communications from the UE on a second frequency sub-band of the second subset of frequency sub-bands, wherein the configuration information indicates that the one or more uplink communications are to use a transmit power that is based at least in part on one or more measurements of the first reference signal on the first frequency sub-band.

14. The method of claim 13 , wherein the configuration information further indicates that a first path loss of the first frequency sub-band is to be used to estimate a second path loss for at least the second frequency sub-band.

15. The method of claim 13 , wherein the one or more uplink communications include one or more of an uplink shared channel communication, an uplink control channel communication, a sounding reference signal communication, or any combinations thereof, that are scheduled on the second frequency sub-band.

16. The method of claim 13 , wherein the configuration information indicates that measurements associated with the first frequency sub-band are used to estimate one or more power parameters for the second frequency sub-band and measurements associated with a third frequency sub-band of the first subset of frequency sub-bands are used to estimate one or more power parameters for a fourth frequency sub-band of the second subset of frequency sub-bands.

17. The method of claim 13 , wherein the configuration information indicates that a first path loss compensation parameter for the first frequency sub-band and a second path loss compensation parameter for the second frequency sub-band are to be based at least in part on one or more measurements of the first reference signal.

18. The method of claim 13 , wherein the configuration information further provides for initiation of a plurality of closed-loop power control processes at the UE that are each associated with a respective frequency sub-band of the plurality of frequency sub-bands, and wherein a transmit power of each of the plurality of frequency sub-bands is set based at least in part on the corresponding closed-loop power control process.

19. The method of claim 18 , wherein the configuration information further provides that the UE accumulates received transmit power control (TPC) commands into the closed-loop power control process associated with the frequency sub-band in which an uplink communication is scheduled.

20. The method of claim 19 , wherein the TPC commands include an indication of one or more of the plurality of closed-loop power control processes to which the TPC command is to be applied.

21. The method of claim 20 , wherein the indication in the TPC commands indicates, based at least in part on the frequency sub-band in which the TPC command is received, that an associated TPC is to be applied to each of the plurality of closed-loop power control processes, to a subset of the plurality of closed-loop power control processes, or to one or more default closed-loop power control processes.

22. The method of claim 13 , further comprising:

receiving, from the UE, a power headroom report for the second frequency sub-band that is based at least in part on a first uplink shared channel power for an uplink communication in the first frequency sub-band.

23. The method of claim 22 , wherein the configuration information further includes a set of configured default parameters for determining a second uplink shared channel power based at least in part on the first uplink shared channel power for the first frequency sub-band.

24. The method of claim 23 , wherein the second uplink shared channel power is determined based at least in part on a resource allocation of an uplink communication in the first frequency sub-band being applied to the second frequency sub-band.

25. An apparatus for wireless communication at a user equipment (UE), comprising:

a processor;

memory coupled with the processor; and

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

identify a plurality of frequency sub-bands for communications with an access network entity and a first frequency sub-band of the plurality of frequency sub-bands as a measurement sub-band;

measure, responsive to the identifying, at least a first reference signal on the first frequency sub-band;

set a first transmission power for the first frequency sub-band and a second transmission power for a second frequency sub-band of the plurality of frequency sub-bands based at least in part on the measuring the first reference signal on the first frequency sub-band, wherein one or more measurements of the first reference signal are used to estimate one or more power parameters associated with the second transmission power; and

transmit, at the second transmission power, one or more uplink communications to the access network entity on the second frequency sub-band.

26. The apparatus of claim 25 , wherein the instructions are further executable by the processor to cause the apparatus to:

determine a first path loss of the first frequency sub-band based at least in part on the measuring the first reference signal; and

determine an estimated path loss for at least the second frequency sub-band based at least in part on the first path loss of the first frequency sub-band.

27. The apparatus of claim 25 , wherein the instructions are further executable by the processor to cause the apparatus to:

initiate a plurality of closed-loop power control processes that are each associated with a respective frequency sub-band of the plurality of frequency sub-bands, and wherein a transmit power of each of the plurality of frequency sub-bands is set based at least in part on the corresponding closed-loop power control process;

determine a second uplink shared channel power for the second frequency sub-band based at least in part on a first uplink shared channel power for an uplink communication in the first frequency sub-band; and

report a power headroom to the access network entity for the second frequency sub-band based at least in part on the determined second uplink shared channel power.

28. An apparatus for wireless communication at an access network entity, 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 configuration information to a user equipment (UE) for communications over a plurality of frequency sub-bands that includes a first subset of frequency sub-bands and a second subset of frequency sub-bands that is non-overlapping with the first subset of frequency sub-bands, wherein the first subset of frequency sub-bands are measurement sub-bands and one or more reference signals transmitted in the first subset of frequency sub-bands are to be used at the UE for transmission power control on the second subset of frequency sub-bands;

transmit a first reference signal on a first frequency sub-band of the first subset of frequency sub-bands; and

receive one or more uplink communications from the UE on a second frequency sub-band of the second subset of frequency sub-bands, wherein the configuration information indicates that the one or more uplink communications are to use a transmit power that is based at least in part on one or more measurements of the first reference signal on the first frequency sub-band.

29. The apparatus of claim 28 , wherein the configuration information indicates that measurements associated with the first frequency sub-band are used to estimate one or more power parameters for the second frequency sub-band and measurements associated with a third frequency sub-band of the first subset of frequency sub-bands are used to estimate one or more power parameters for a fourth frequency sub-band of the second subset of frequency sub-bands.

30. The apparatus of claim 28 , wherein the configuration information further provides for initiation of a plurality of closed-loop power control processes at the UE that are each associated with a respective frequency sub-band of the plurality of frequency sub-bands, and wherein a transmit power of each of the plurality of frequency sub-bands is set based at least in part on the corresponding closed-loop power control process; and

wherein the instructions are further executable by the processor to cause the apparatus to receive, from the UE, a power headroom report for the second frequency sub-band that is based at least in part on a first uplink shared channel power for an uplink communication in the first frequency sub-band.