Sidelink coordination for power control
Methods, systems, and devices for wireless communications are described. In some cases, a first user equipment (UE) within a coverage area of a base station may determine a power control configuration. The first UE may transmit an indication of the power control configuration to a second UE, which may adjust one or more power control parameters based on the indication. The one or more power control parameters may include a target received power, a compensation factor, a downlink path loss between the base station and the first UE, or a combination thereof. The second UE may use the adjusted one or more power control parameters to determine a transmit power and may transmit a message to the first UE with the determined transmit power. In some cases, the second UE may be outside of the coverage area of the base station.
1. An apparatus for wireless communication at a first user equipment (UE), comprising:
one or more memories; and
one or more processors coupled with the one or more memories and configured to cause the first UE to:
receive an indication of a path loss corresponding to a communication link between a second UE and a network entity, the second UE different from the first UE;
adjust one or more power control parameters of the first UE based at least in part on the indication of the path loss corresponding to the communication link between the second UE and the network entity; and
transmit a message based at least in part on the one or more power control parameters.
2. The apparatus of claim 1 , wherein the one or more processors are configured to cause the first UE to:
receive an indication of a power control configuration that comprises an indication of a target receive power, an indication of a compensation factor, or a combination thereof;
adjust the one or more power control parameters of the first UE based at least in part on the indication of the target receive power, the indication of the compensation factor, or the combination thereof; and
transmit the message based at least in part on the indication of the target receive power, the indication of the compensation factor, or the combination thereof.
3. The apparatus of claim 1 , wherein the one or more processors are configured to cause the first UE to:
determine that one or more sidelink proximity parameters associated with communication between the first UE and the second UE satisfy one or more corresponding thresholds; and
adjust the one or more power control parameters based at least in part on the one or more sidelink proximity parameters and the one or more corresponding thresholds.
4. The apparatus of claim 3 , wherein the one or more sidelink proximity parameters comprise a second path loss associated with the communication between the first UE and the second UE, and wherein the one or more processors are configured to cause the first UE to:
determine that the second path loss is below a threshold path loss; and
adjust the one or more power control parameters based at least in part on the second path loss and the threshold path loss.
5. The apparatus of claim 3 , wherein the one or more sidelink proximity parameters comprise a distance between the first UE and the second UE, and wherein the one or more processors are configured to cause the first UE to:
determine that the distance is below a threshold distance; and
adjust the one or more power control parameters based at least in part on the distance and the threshold distance.
6. The apparatus of claim 3 , wherein the one or more sidelink proximity parameters comprise a reference signal received power (RSRP) associated with the communication between the first UE and the second UE, and wherein the one or more processors are configured to cause the first UE to:
determine that the RSRP is above an RSRP threshold; and
adjust the one or more power control parameters based at least in part on the RSRP and the RSRP threshold.
7. The apparatus of claim 1 , further comprising:
one or more antennas configured to transmit a request for the indication of the path loss and to receive the indication of the path loss based at least in part on the request.
8. The apparatus of claim 1 , wherein the one or more processors are configured to cause the first UE to:
determine a transmit power based at least in part on the adjusted one or more power control parameters; and
transmit the message based at least in part on the determined transmit power.
9. The apparatus of claim 8 , wherein the one or more processors are configured to cause the first UE to:
determine a second path loss associated with communication between the first UE and the second UE; and
determine the transmit power based at least in part on the second path loss.
10. The apparatus of claim 8 , wherein the one or more processors are configured to cause the first UE to:
receive an indication of a power control configuration, wherein the indication of the power control configuration comprises an indication of a target receive power, an indication of a compensation factor, or a combination thereof, and wherein the transmit power is linearly proportional to the indicated target receive power, exponentially proportional to the indicated compensation factor, or a combination thereof.
11. The apparatus of claim 1 , wherein the first UE is outside of a coverage area of the network entity.
12. A method for wireless communication at a first user equipment (UE), comprising:
receiving an indication of a path loss corresponding to a communication link between a second UE and a network entity, the second UE different from the first UE;
adjusting one or more power control parameters of the first UE based at least in part on the indication of the path loss corresponding to the communication link between the second UE and the network entity; and
transmitting a message based at least in part on the one or more power control parameters.
13. The method of claim 12 , further comprising:
receiving an indication of a power control configuration that comprises an indication of a target receive power, an indication of a compensation factor, or a combination thereof;
adjusting the one or more power control parameters of the first UE based at least in part on the indication of the target receive power, the indication of the compensation factor, or the combination thereof; and
transmitting the message based at least in part on the indication of the target receive power, the indication of the compensation factor, or the combination thereof.
14. The method of claim 12 , further comprising:
determining that one or more sidelink proximity parameters associated with communication between the first UE and the second UE satisfy one or more corresponding thresholds; and
adjusting the one or more power control parameters based at least in part on the one or more sidelink proximity parameters and the one or more corresponding thresholds.
15. The method of claim 14 , wherein the one or more sidelink proximity parameters comprise a second path loss, the method further comprising:
determining that the second path loss is below a threshold path loss; and
adjusting the one or more power control parameters based at least in part on the second path loss and the threshold path loss.
16. The method of claim 14 , wherein the one or more sidelink proximity parameters comprise a distance between the first UE and the second UE, the method further comprising:
determining that the distance is below a threshold distance; and
adjusting the one or more power control parameters based at least in part on the distance and the threshold distance.
17. The method of claim 14 , wherein the one or more sidelink proximity parameters comprise a reference signal received power (RSRP) associated with the communication between the first UE and the second UE, the method further comprising:
determining that the RSRP is above an RSRP threshold; and
adjusting the one or more power control parameters based at least in part on the RSRP and the RSRP threshold.
18. The method of claim 12 , further comprising:
transmitting a request for the indication of the path loss; and
receiving the indication of the path loss based at least in part on the request.
19. The method of claim 12 , further comprising:
determining a transmit power based at least in part on the adjusted one or more power control parameters; and
transmitting the message based at least in part on the determined transmit power.
20. The method of claim 19 , further comprising:
determining a second path loss associated with communication between the first UE and the second UE; and
determining the transmit power based at least in part on the second path loss.
21. The method of claim 19 , further comprising:
transmitting an indication of a power control configuration that comprises an indication of a target receive power, an indication of a compensation factor, or a combination thereof, wherein the transmit power is linearly proportional to the indicated target receive power, exponentially proportional to the indicated compensation factor, or a combination thereof.
22. The method of claim 12 , wherein the first UE is outside of a coverage area of the network entity.
23. A non-transitory computer-readable medium storing code for wireless communication at a first user equipment (UE), the code comprising instructions executable by one or more processors to:
receive an indication of a path loss corresponding to a communication link between a second UE and a network entity, the second UE different from the first UE;
adjust one or more power control parameters of the first UE based at least in part on the indication of the path loss corresponding to the communication link between the second UE and the network entity; and
transmit a message based at least in part on the one or more power control parameters.
24. The non-transitory computer-readable medium of claim 23 , wherein the instructions are executable by the one or more processors to:
receive an indication of a power control configuration that comprises an indication of a target receive power, an indication of a compensation factor, or a combination thereof;
adjust the one or more power control parameters of the first UE based at least in part on the indication of the target receive power, the indication of the compensation factor, or the combination thereof; and
transmit the message based at least in part on the indication of the target receive power, the indication of the compensation factor, or the combination thereof.
25. The non-transitory computer-readable medium of claim 23 , wherein the instructions are executable by the one or more processors to:
determine that one or more sidelink proximity parameters associated with communication between the first UE and the second UE satisfy one or more corresponding thresholds; and
adjust the one or more power control parameters based at least in part on the one or more sidelink proximity parameters and the one or more corresponding thresholds.
26. An apparatus for wireless communication at a first user equipment (UE), comprising:
means for receiving an indication of a path loss corresponding to a communication link between a second UE and a network entity, the second UE different from the first UE;
means for adjusting one or more power control parameters of the first UE based at least in part on the indication of the path loss corresponding to the communication link between the second UE and the network entity; and
means for transmitting a message based at least in part on the one or more power control parameters.
27. The apparatus of claim 26 , the apparatus further comprising:
means for receiving an indication of a power control configuration that comprises an indication of a target receive power, an indication of a compensation factor, or a combination thereof;
means for adjusting the one or more power control parameters of the first UE based at least in part on the indication of the target receive power, the indication of the compensation factor, or the combination thereof; and
means for transmitting the message based at least in part on the indication of the target receive power, the indication of the compensation factor, or the combination thereof.