Reduction of self-interference in full-duplex communication

1. A method for managing user equipment (UE) self-interference by a base station (BS), comprising:

receiving, from the UE, a first signal comprising a request to change a first beam pair, wherein the first beam pair comprises a first uplink beam and a first downlink beam utilized by the UE for full-duplex communication with the BS;

determining a second beam pair based on one or more communication parameters of the full-duplex communication; and

transmitting a second signal to the UE, wherein the second signal is responsive to the request and configured to enable the UE to change the first beam pair to the second beam pair and maintain the full-duplex communication with the BS.

2. The method of claim 1 , wherein the one or more communication parameters comprise one or more of:

(i) which antenna array of a plurality of antenna arrays on the UE is used for the full-duplex communication with the BS;

(ii) whether the first beam pair is utilized by the UE to communicate data over a physical shared channel, a physical control channel, or both;

(iii) whether the second beam pair is to be utilized by the UE to communicate data over the physical shared channel, the physical control channel, or both;

(iv) one or more beam parameters of the first beam pair; or

(v) one or more beam parameters of the second beam pair.

3. The method of claim 2 , wherein the one or more beam parameters comprise one or more of a beam direction, a transmission power, a beam width, a signal-to-noise ratio (SNR), or a beam side lobe strength.

4. The method of claim 1 , wherein the second beam pair comprises a second uplink beam and a second downlink beam, wherein the second uplink beam comprises a first reference signal (RS), and wherein the second downlink beam comprises a second RS.

5. The method of claim 1 , further comprising:

transmitting a plurality of reference signals (RSs), wherein each RS is communicated to the UE via one of a plurality of downlink beams;

receiving a first report from the UE in response to transmission of the RSs, the first report indicating:

one or more alternative beam pairs, wherein each of the one or more alternative beam pairs are configured to be utilized by the UE, and

a quality of each of the one or more alternative beam pairs, wherein the quality is based at least on a self-interference measurement made using one or more of the plurality of RSs;

determining which of the one or more alternative beam pairs the UE can utilize to maintain the full-duplex communication with the BS; and

transmitting a second report to the UE identifying the determined one or more alternative beam pairs, wherein the second report includes the second beam pair.

6. The method of claim 5 , wherein the request to change the first beam pair is responsive to the second report and comprises a selection of the second beam pair by the UE, the method further comprising determining the second beam pair based in part on the UE selection.

7. The method of claim 5 , further comprising receiving a third signal from the UE, the third signal configured to trigger transmission of the plurality of RSs.

8. The method of claim 5 , further comprising transmitting the plurality of RSs via the plurality of downlink beams to the UE at regular intervals.

9. A base station (BS) configured for managing self-interference at a user equipment (UE), comprising:

a memory; and

a processor communicatively coupled to the memory, wherein the processor is configured to:

receive, from the UE, a first signal comprising a request to change a first beam pair, wherein the first beam pair comprises a first uplink beam and a first downlink beam utilized by the UE for full-duplex communication with the BS;

determine a second beam pair based on one or more communication parameters of the full-duplex communication; and

transmit a second signal to the UE, wherein the second signal is responsive to the request and configured to enable the UE to change the first beam pair to the second beam pair and maintain the full-duplex communication with the BS.

10. The BS of claim 9 , wherein the one or more communication parameters comprise one or more of:

(i) which antenna array of a plurality of antenna arrays on the UE is used for the full-duplex communication with the BS;

(ii) whether the first beam pair is utilized by the UE to communicate data over a physical shared channel, a physical control channel, or both;

(iii) whether the second beam pair is to be utilized by the UE to communicate data over the physical shared channel, the physical control channel, or both;

(iv) one or more beam parameters of the first beam pair; or

(v) one or more beam parameters of the second beam pair.

11. The BS of claim 10 , wherein the one or more beam parameters comprise one or more of a beam direction, a transmission power, a beam width, a signal-to-noise ratio (SNR), or a beam side lobe strength.

12. The BS of claim 9 , wherein the second beam pair comprises a second uplink beam and a second downlink beam, wherein the second uplink beam comprises a first reference signal (RS), and wherein the second downlink beam comprises a second RS.

13. The BS of claim 9 , wherein the processor is further configured to:

transmit a plurality of reference signals (RSs), wherein each RS is communicated to the UE via one of a plurality of downlink beams;

receive a first report from the UE in response to transmission of the RSs, the first report indicating:

one or more alternative beam pairs, wherein each of the one or more alternative beam pairs are configured to be utilized by the UE, and

a quality of each of the one or more alternative beam pairs, wherein the quality is based at least on a self-interference measurement made using one or more of the plurality of RSs;

determine which of the one or more alternative beam pairs the UE can utilize to maintain the full-duplex communication with the BS; and

transmit a second report to the UE identifying the determined one or more alternative beam pairs, wherein the second report includes the second beam pair.

14. The BS of claim 13 , wherein the request to change the first beam pair is responsive to the second report and comprises a selection of the second beam pair by the UE, and wherein the processor is further configured to determine the second beam pair based in part on the UE selection.

15. The BS of claim 13 , wherein the processor is further configured to receive a third signal from the UE, the third signal configured to trigger the processor to transmit the plurality of RSs.

16. The BS of claim 13 , wherein the processor is further configured to transmit the plurality of RSs via the plurality of downlink beams to the UE at regular intervals.

17. A method of managing self-interference by a user equipment (UE), comprising:

establishing full-duplex communication with a base station (BS) utilizing a first beam pair, the first beam pair comprising a first uplink beam and a first downlink beam utilized by the UE for the full-duplex communication;

transmitting a first signal to the BS, the first signal comprising a request to change the first beam pair; and

receiving a second signal responsive to the request, the second signal configured to enable the UE to change from the first beam pair to a second beam pair and maintain the full-duplex communication with the BS, wherein the second beam pair comprises one or more of a second uplink beam or a second downlink beam.

18. The method of claim 17 , further comprising:

transmitting a third signal to the BS; and

determining a first signal-to-self-interference and noise ratio (SINR) of the third signal, the first SINR indicative of self-interference between the first uplink beam and the first downlink beam.

19. The method of claim 18 , further comprising determining the first SINR by utilizing a plurality of downlink beams to measure the transmitted third signal.

20. The method of claim 18 , further comprising:

selecting a plurality of beam pairs, wherein each of the plurality of beam pairs include an uplink beam and a downlink beam;

transmitting a signal to the BS via the uplink beam of each of the plurality of beam pairs;

determining an SINR of each of the plurality of beam pairs; and

comparing the SINR of each of the plurality of beam pairs to the first SINR to determine whether one or more of the plurality of beam pairs have an increased SINR relative to the first SINR, wherein a determination that one or more of the plurality of beam pairs have the increased SINR triggers transmission of the first signal comprising the request.

21. The method of claim 20 , wherein the request to change the first beam pair comprises an indication of one or more beam pairs of the plurality of beam pairs having the increased SINR.

22. The method of claim 17 , further comprising:

receiving a plurality of reference signals (RSs), wherein each of the plurality of RSs is transmitted by the BS via one of a plurality of beams, and wherein each RS is configured to identify a corresponding one of the plurality of beams;

performing a reference signal received power (RSRP) measurement to determine an RSRP value of the received RSs; and

transmitting a first report to the BS indicating the RSRP value of each of the received RSs; and

receiving, from the BS, a second report configured to identify one or more beam pairs based on the first report, wherein each of the one or more beam pairs comprise a uplink beam and a downlink beam that the UE can utilize to maintain the full-duplex communication with the BS.

23. The method of claim 17 , wherein the second signal is configured to enable the UE to change from the first beam pair to the second beam pair by identifying a reference signal (RS) corresponding to each of the second uplink beam or the second downlink beam.

24. A user equipment (UE) configured for managing self-interference in a full-duplex communication, comprising:

a memory; and

a processor communicatively coupled to the memory, wherein the processor is configured to:

establish full-duplex communication with a base station (BS) utilizing a first beam pair, the first beam pair comprising a first uplink beam and a first downlink beam utilized by the UE for the full-duplex communication;

transmit a first signal to the BS, the first signal comprising a request to change the first beam pair; and

receive a second signal responsive to the request, the second signal configured to enable the UE to change from the first beam pair to a second beam pair and maintain the full-duplex communication with the BS, wherein the second beam pair comprises one or more of a second uplink beam or a second downlink beam.

25. The UE of claim 24 , wherein the processor is further configured to:

transmit a third signal to the BS; and

determine a first signal-to-self-interference and noise ratio (SINR) of the third signal, the first SINR indicative of self-interference between the first uplink beam and the first downlink beam.

26. The UE of claim 25 , wherein the processor is further configured to determine the first SINR by utilizing the first downlink beam to measure the transmitted third signal.

27. The UE of claim 25 , wherein the processor is further configured to:

select a plurality of beam pairs, wherein each of the plurality of beam pairs include an uplink beam and a downlink beam;

transmit a signal to the BS via the uplink beam of each of the plurality of beam pairs;

determine an SINR of each of the plurality of beam pairs; and

compare the SINR of each of the plurality of beam pairs to the first SINR to determine whether one or more of the plurality of beam pairs have an increased SINR relative to the first SINR, wherein a determination that one or more of the plurality of beam pairs have the increased SINR triggers transmission of the first signal comprising the request.

28. The UE of claim 27 , wherein the request to change the first beam pair comprises an indication of one or more beam pairs of the plurality of beam pairs having the increased SINR.

29. The UE of claim 24 , wherein the processor is further configured to:

receive a plurality of reference signals (RSs), wherein each of the plurality of RSs is transmitted by the BS via one of a plurality of beams, and wherein each RS is configured to identify a corresponding one of the plurality of beams;

perform a reference signal received power (RSRP) measurement to determine an RSRP value of the received RSs; and

transmit a first report to the BS indicating the RSRP value of each of the received RSs; and

receive, from the BS, a second report configured to identify one or more beam pairs based on the first report, wherein each of the one or more beam pairs comprise a uplink beam and a downlink beam that the UE can utilize to maintain the full-duplex communication with the BS.

30. The UE of claim 24 , wherein the second signal is configured to enable the UE to change from the first beam pair to the second beam pair by identifying a reference signal (RS) corresponding to each of the second uplink beam or the second downlink beam.