Techniques for autonomously determining candidate beams to support full-duplex communication

1. An apparatus for wireless communication, comprising:

a transceiver;

a memory configured to store instructions; and

one or more processors communicatively coupled with the memory and the transceiver, wherein the one or more processors are configured to execute the instructions to cause the apparatus to:

communicate based on a current full-duplex (FD) beam pair configured for full-duplex communication, wherein the current FD beam pair includes both of a transmit beam for transmitting communications by the apparatus and a receive beam for receiving communications by the apparatus;

autonomously measure one or more new candidate FD beam pairs using configured resources to determine measurement results for the one or more new candidate FD beam pairs including, for each given candidate FD beam pair in at least a subset of the one or more new candidate FD beam pairs, measuring self-interference caused in communications received by the apparatus and using one or more receive beams of the given candidate FD beam pair by communications transmitted by the apparatus using one or more transmit beams of the given candidate FD beam pair; and

report, based on a measurement result for at least one new candidate FD beam pair of the one or more new candidate FD beam pairs, the measurement result or an indication of the at least one new candidate FD beam pair.

2. The apparatus of claim 1 , wherein the one or more processors are configured to execute the instructions to cause the apparatus to autonomously measure the one or more new candidate FD beam pairs at least in part by:

transmitting, over scheduled uplink resources, an uplink communication using a transmit beam of the one or more new candidate FD beam pairs;

measuring, over the scheduled uplink resources, the uplink communication using one or more receive beams of the one or more new candidate FD beam pairs; and

determining the at least one new candidate FD beam pair from the one or more new candidate FD beam pairs as each including a corresponding transmit beam and at least a portion of one or more corresponding receive beams determined to have the measurement result below a threshold.

3. The apparatus of claim 2 , wherein the uplink communication is at least one of an uplink control channel communications, an uplink data channel communication, a reference signal, or a random access procedure communication.

4. The apparatus of claim 1 , wherein the one or more processors are further configured to execute the instructions to cause the apparatus to receive an indication of resources for a measurement gap, and wherein the one or more processors are configured to execute the instructions to cause the apparatus to autonomously measure the one or more new candidate FD beam pairs at least in part by:

transmitting, over the resources of the measurement gap, an uplink reference signal using a transmit beam of the one or more new candidate FD beam pairs;

measuring, over the resources of the measurement gap, the uplink reference signal using one or more receive beams of the one or more new candidate FD beam pairs; and

determining the at least one new candidate FD beam pair from the one or more new candidate FD beam pairs as each including a corresponding transmit beam and at least a portion of one or more corresponding receive beams determined to have the measurement result below a threshold.

5. The apparatus of claim 4 , wherein the uplink reference signal is at least one of a sounding reference signal, a demodulation reference signal, or a random access procedure communication.

6. The apparatus of claim 4 , wherein the one or more processors are configured to execute the instructions to cause the apparatus to receive the indication of resources for the measurement gap as at least one of a periodic configuration or an on-demand configuration based on a transmitted request.

7. The apparatus of claim 6 , wherein the one or more processors are further configured to execute the instructions to cause the apparatus to request the on-demand configuration based at least in part on determining that a downlink reception quality is below a threshold.

8. The apparatus of claim 4 , wherein the one or more processors are configured to execute the instructions to cause the apparatus to transmit the uplink reference signal using multiple transmit beams, wherein the one or more processors are configured to execute the instructions to cause the apparatus to measure the uplink reference signal transmitted using the multiple transmit beams using the one or more receive beams, and wherein the one or more processors are configured to execute the instructions to cause the apparatus to determine the one or more new candidate FD beam pairs as each including one of the multiple transmit beams and at least the portion of the one or more receive beams determined to have the measurement result below the threshold.

9. The apparatus of claim 1 , wherein the one or more processors are configured to execute the instructions to cause the apparatus to report the measurement result or the indication of the at least one new candidate FD beam pair based at least in part on determining that the at least one new candidate FD beam pair has the measurement result that is below a threshold.

10. The apparatus of claim 9 , wherein the one or more processors are configured to execute the instructions to cause the apparatus to report the measurement result or the indication of the at least one new candidate FD beam pair further based at least in part on determining that a current measurement result of the current FD beam pair is above a threshold.

11. The apparatus of claim 1 , wherein the one or more processors are configured to execute the instructions to cause the apparatus to report the measurement result or the indication of the at least one new candidate FD beam pair based at least in part on determining that the at least one new candidate FD beam pair has the measurement result that is less than other ones of the one or more new candidate FD beam pairs or less than that of a current beam pair.

12. The apparatus of claim 11 , wherein the one or more processors are configured to execute the instructions to cause the apparatus to report the measurement result or the indication of the at least one new candidate FD beam pair further based at least in part on determining that a current measurement result of one or more current beams is above a threshold.

13. The apparatus of claim 1 , wherein the one or more processors are configured to execute the instructions to cause the apparatus to report the measurement result or the indication of the at least one new candidate FD beam pair via media access control (MAC) control element (CE).

14. The apparatus of claim 1 , wherein the one or more processors are configured to execute the instructions to cause the apparatus to report the measurement result or the indication of the at least one new candidate FD beam pair in uplink control information (UCI) over uplink channel resources.

15. The apparatus of claim 14 , wherein the one or more processors are further configured to execute the instructions to cause the apparatus to multiplex the measurement result or the indication of the at least one new candidate FD beam pair with other UCI.

16. The apparatus of claim 1 , wherein the one or more processors are further configured to execute the instructions to cause the apparatus to receive an indication to use the at least one new candidate FD beam pair in subsequent communications.

17. An apparatus for wireless communication, comprising:

a transceiver;

a memory configured to store instructions; and

one or more processors communicatively coupled with the memory and the transceiver, wherein the one or more processors are configured to execute the instructions to cause the apparatus to:

transmit, to a user equipment (UE), a configuration indicating a measurement gap, wherein the measurement gap is for measuring self-interference caused in communications received by the UE using one or more receive beams of at least one new candidate full-duplex (FD) beam pair by communications transmitted by the UE using one or more transmit beams of the at least one new candidate FD beam pair; and

receive a measurement result or an indication of at least one new candidate FD beam pair of one or more new candidate FD beams measured during the measurement gap.

18. The apparatus of claim 17 , wherein the one or more processors are configured to execute the instructions to cause the apparatus to transmit the configuration based on receiving a request for the measurement gap.

19. The apparatus of claim 17 , wherein the configuration indicates one or more parameters for transmitting the measurement result.

20. The apparatus of claim 19 , wherein the one or more parameters relate to determining that the measurement result is above or below a threshold.

21. The apparatus of claim 17 , wherein the one or more processors are configured to execute the instructions to cause the apparatus to receive the measurement result or the indication of the at least one new candidate FD beam pair via media access control (MAC) control element (CE).

22. The apparatus of claim 17 , wherein the one or more processors are configured to execute the instructions to cause the apparatus to receive the measurement result or the indication of the at least one new candidate FD beam pair in uplink control information (UCI) over uplink channel resources.

23. The apparatus of claim 22 , wherein the measurement result or the indication of the at least one new candidate FD beam pair is multiplexed with other UCI, and wherein the one or more processors are further configured to execute the instructions to cause the apparatus to determine existence of the measurement result or the indication of the at least one new candidate FD beam pair based on a hypothesis for UCI size.

24. The apparatus of claim 17 , wherein the one or more processors are further configured to execute the instructions to cause the apparatus to configured the at least one new candidate FD beam pair in subsequent communications.

25. A method for wireless communication, comprising:

communicating, by a user equipment (UE), based on a current full-duplex (FD) beam pair configured for full-duplex communication, wherein the current FD beam pair includes both of a transmit beam for transmitting communications by the UE and a receive beam for receiving communications by the UE;

autonomously measuring one or more new candidate FD beam pairs during configured resources to determine measurement results for the one or more new candidate FD beam pairs including, for each given candidate FD beam pair in at least a subset of the one or more new candidate FD beam pairs, measuring self-interference caused in communications received by the UE and using one or more receive beams of the given candidate FD beam pair by communications transmitted by the UE using one or more transmit beams of the given candidate FD beam pair; and

reporting, based on a measurement result for at least one new candidate FD beam pair of the one or more new candidate FD beam pairs, the measurement result or an indication of the at least one new candidate FD beam pair.

26. The method of claim 25 , wherein autonomously measuring the one or more new candidate FD beam pairs includes:

transmitting, over scheduled uplink resources, an uplink communication using a transmit beam of the one or more new candidate FD beam pairs;

measuring, over the scheduled uplink resources, the uplink communication using one or more receive beams of the one or more new candidate FD beam pairs; and

determining the at least one new candidate FD beam pair from the one or more new candidate FD beam pairs as each including a corresponding transmit beam and at least a portion of one or more corresponding receive beams determined to have the measurement result below a threshold.

27. The method of claim 26 , wherein the uplink communication is at least one of an uplink control channel communications, an uplink data channel communication, a reference signal, or a random access procedure communication.

28. The method of claim 25 , further comprising receiving an indication of resources for a measurement gap, and wherein autonomously measuring the one or more new candidate FD beam pairs includes:

transmitting, over the resources of the measurement gap, an uplink reference signal using a transmit beam of the one or more new candidate FD beam pairs;

measuring, over the resources of the measurement gap, the uplink reference signal using one or more receive beams of the one or more new candidate FD beam pairs; and

determining the at least one new candidate FD beam pair from the one or more new candidate FD beam pairs as each including a corresponding transmit beam and at least a portion of one or more corresponding receive beams determined to have the measurement result below a threshold.

29. A method for wireless communication, comprising:

transmitting, to a user equipment (UE), a configuration indicating a measurement gap, wherein the measurement gap is for measuring self-interference caused in communications received by the UE using one or more receive beams of at least one new candidate full-duplex (FD) beam pair by communications transmitted by the UE using one or more transmit beams of the at least one new candidate FD beam pair; and

receiving a measurement result or an indication of at least one new candidate FD beam pair of one or more new candidate FD beams measured during the measurement gap.

30. The method of claim 29 , wherein transmitting the configuration is based on receiving a request for the measurement gap.