System and method for beam management with emissions limitations
A computer-implemented method for operating a user equipment (UE) includes measuring beamformed reference signals, selecting one or more beams in accordance with the measured beamformed reference signals, and determining, by the UE, that an uplink transmit power of the UE on a subset of the one or more beams is limited by emission criteria, and based thereon, transmitting, by the UE, a beam report indicating the one or more beams and an uplink transmit power limitation.
1. A method implemented by a user equipment (UE), the method comprising:
measuring, by the UE, beamformed reference signals;
selecting, by the UE, one or more beams in accordance with the measured beamformed reference signals; and
determining, by the UE, that an uplink transmit power of the UE on a subset of the one or more beams is limited by emission criteria, and based thereon,
transmitting, by the UE, a beam report indicating the one or more beams and an uplink transmit power limitation.
2. The method of claim 1 , wherein the beamformed reference signals are measured during a beam management (BM) procedure.
3. The method of claim 1 , wherein the beam report comprises a non-group-based report.
4. The method of claim 3 , wherein an indicator of the uplink transmit power limitation indicates that the subset of the one or more beams are impacted by the emission criteria.
5. The method of claim 3 , wherein the beam report further indicates a power backoff value subject to a maximum transmission power or a maximum transmit power of the UE subject to the emission criteria.
6. The method of claim 1 , wherein the beam report comprises a group-based report.
7. The method of claim 6 , further comprising grouping, by the UE, the subset of the one or more beams in accordance with the emission criteria.
8. The method of claim 6 , wherein the beam report further indicates a power backoff value or a maximum uplink transmit power of the UE subject to the emission criteria.
9. The method of claim 1 , wherein the beam report is transmitted in a channel state information (CSI) report.
10. The method of claim 1 , wherein the beamformed reference signals comprise at least one of a channel state information reference signal (CSI-RS) or a synchronization signal block (SSB).
11. The method of claim 1 , wherein the emission criteria comprises electromagnetic field emission criteria published by at least one of the International Commission and Non-Ionizing Radiation Protection (ICNIRP), the Federal Communication Commission (FCC), or the Institute of Electrical and Electronics Engineers (IEEE).
12. A method implemented by an access node, the method comprising:
transmitting, by the access node, beamformed reference signals;
receiving, by the access node from a user equipment (UE), a beam report indicating one or more beams and an uplink transmit power limitation; and
selecting, by the access node, one or more beam pair links (BPLs) from the one or more beams in accordance with the beam report.
13. The method of claim 12 , wherein the beam report is received in a channel state information (CSI) report.
14. The method of claim 12 , wherein the beamformed reference signals comprise at least one of a channel state information reference signal (CSI-RS) or a synchronization signal block (SSB).
15. The method of claim 12 , wherein the beam report comprises a non-group-based report.
16. The method of claim 15 , wherein an indicator of the uplink transmit power limitation indicates that a subset of the one or more beams are impacted by emission criteria or a power backoff value subject to a maximum transmission power.
17. The method of claim 12 , wherein the beam report comprises a group-based report.
18. The method of claim 12 , wherein selecting the one or more BPLs comprises selecting the one or more BPLs in accordance with an indicator of the one or more beams and an indicator of the uplink transmit power limitation.
19. A user equipment (UE) comprising:
a non-transitory memory storage comprising instructions; and
one or more processors in communication with the non-transitory memory storage, wherein the one or more processors execute the instructions to:
measure beamformed reference signals,
select one or more beams in accordance with the measured beamformed reference signals, and
determining, by the UE, that an uplink transmit power of the UE on a subset of the one or more beams is limited by emission criteria, and based thereon,
transmitting, by the UE, a beam report indicating the one or more beams and an uplink transmit power limitation.
20. The UE of claim 19 , wherein the beam report comprises a non-group-based report.
21. The UE of claim 19 , wherein an indicator of the uplink transmit power limitation indicates that the subset of the one or more beams are impacted by the emission criteria.
22. The UE of claim 21 , wherein the one or more processors further execute the instructions to determine that the uplink transmit power of the UE according to open loop power control is unachievable, and based thereon, determine that the uplink transmit power of the UE is limited to meet emission criteria.
23. The UE of claim 19 , wherein the beam report comprises a group-based report.
24. The UE of claim 19 , wherein the one or more processors further execute the instructions to group the one or more beams in accordance with the emission criteria.
25. An access node comprising:
a non-transitory memory storage comprising instructions; and
one or more processors in communication with the non-transitory memory storage, wherein the one or more processors execute the instructions to:
transmit beamformed reference signals,
receive, from a user equipment (UE), a beam report indicating one or more beams and an uplink transmit power limitation, and
select one or more beam pair links (BPLs) from the one or more beams in accordance with the beam report.
26. The access node of claim 25 , wherein the beam report comprises a non-group-based report.
27. The access node of claim 25 , wherein the beam report comprises a group-based report.