US 11,695,453 B2
Method for maintaining beamforming in wireless AV system, and wireless device using same
Hyowon Bae, Seoul (KR); Jungwoo Kim, Seoul (KR); Jinmin Kim, Seoul (KR); Jaewook Song, Seoul (KR); and Jinsoo Choi, Seoul (KR)
Assigned to LG ELECTRONICS INC., Seoul (KR)
Appl. No. 17/599,419
Filed by LG ELECTRONICS INC., Seoul (KR)
PCT Filed May 7, 2019, PCT No. PCT/KR2019/005416
§ 371(c)(1), (2) Date Sep. 28, 2021,
PCT Pub. No. WO2020/226196, PCT Pub. Date Nov. 12, 2020.
Prior Publication US 2022/0216897 A1, Jul. 7, 2022
Int. Cl. H04B 7/0408 (2017.01); H04B 17/309 (2015.01); H04B 7/0413 (2017.01); H04B 7/0491 (2017.01)
CPC H04B 7/0408 (2013.01) [H04B 7/0413 (2013.01); H04B 7/0491 (2013.01); H04B 17/309 (2015.01)] 14 Claims
OG exemplary drawing
 
1. A method for maintaining beamforming in a wireless audio-video (AV) system, the method comprising:
transmitting, by a first wireless device, a packet including a non-training field and multiple training fields to a second wireless device,
wherein the non-training field is transmitted based on a best sector combination among predetermined multiple candidate sector combinations between the first wireless device and the second wireless device, and
wherein the multiple training fields are transmitted based on the multiple candidate sector combinations;
receiving, by the first wireless device, candidate beam feedback information as a response to the multiple training fields;
determining, by the first wireless device, whether or not a channel change that is caused by blockage occurs based on the candidate beam feedback information; and
based on a determined result that the channel change occurs, updating, by the first wireless device, the best sector combination based on the candidate feedback information.