US 12,250,646 B2
Beam management solution for MPE
Haitong Sun, Cupertino, CA (US); Chunhai Yao, Beijing (CN); Dawei Zhang, Saratoga, CA (US); Hong He, San Jose, CA (US); Rohit U Nabar, Sunnyvale, CA (US); Wei Zeng, Saratoga, CA (US); Yakun Sun, San Jose, CA (US); Yuchul Kim, San Jose, CA (US); and Yushu Zhang, Beijing (CN)
Assigned to Apple Inc., Cupertino, CA (US)
Appl. No. 17/642,207
Filed by Apple Inc., Cupertino, CA (US)
PCT Filed Sep. 12, 2019, PCT No. PCT/CN2019/105721
§ 371(c)(1), (2) Date Mar. 10, 2022,
PCT Pub. No. WO2021/046809, PCT Pub. Date Mar. 18, 2021.
Prior Publication US 2022/0322247 A1, Oct. 6, 2022
Int. Cl. H04B 7/00 (2006.01); H04B 7/0404 (2017.01); H04B 7/06 (2006.01); H04B 17/318 (2015.01); H04W 52/36 (2009.01); H04W 52/42 (2009.01)
CPC H04W 52/367 (2013.01) [H04B 7/0404 (2013.01); H04B 7/0695 (2013.01); H04B 17/318 (2015.01); H04W 52/365 (2013.01); H04W 52/42 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A user equipment device (UE), comprising:
at least one antenna;
at least one radio, wherein the at least one radio is configured to perform cellular communication using at least one radio access technology (RAT);
one or more processors coupled to the at least one radio, wherein the one or more processors and the at least one radio are configured to perform voice and/or data communications;
wherein the one or more processors are configured to cause the UE to:
detect that a maximum possible exposure (MPE) level exceeds a threshold for at least one uplink (UL) beam; and
perform, based on detection of the MPE level exceeding the threshold, one or more remedial actions, wherein the one or more remedial actions prioritize UL beam quality over downlink (DL) beam quality, and wherein the one or more remedial actions include at least one of:
reducing a transmit power of the at least one UL beam based on a maximum power reduction (MPR);
triggering an intra-panel switch to a first candidate UL beam that satisfies one or more conditions for intra-panel beam switching;
triggering an inter-panel switch to a second candidate UL beam that satisfies one or more conditions for inter-panel beam switching; or
signaling a beam failure to a network serving the UE based on the unsafe UL beam condition.