US 12,463,693 B2
RIS-assisted wireless communications
Linglong Dai, Beijing (CN); Ruochen Su, Huaibei (CN); Jingbo Tan, Beijing (CN); Mo Hao, Beijing (CN); and Richard Mackenzie, London (GB)
Assigned to British Telecommunications Public Limited Company, London (GB)
Appl. No. 18/000,164
Filed by BRITISH TELECOMMUNICATIONS PUBLIC LIMITED COMPANY, London (GB)
PCT Filed Apr. 12, 2021, PCT No. PCT/EP2021/059385
§ 371(c)(1), (2) Date Nov. 29, 2022,
PCT Pub. No. WO2021/239311, PCT Pub. Date Dec. 2, 2021.
Claims priority of application No. PCT/CN2020/093299 (WO), filed on May 29, 2020.
Prior Publication US 2023/0208486 A1, Jun. 29, 2023
Int. Cl. H04B 7/06 (2006.01); H04B 7/0456 (2017.01); H04B 7/145 (2006.01)
CPC H04B 7/0617 (2013.01) [H04B 7/0456 (2013.01); H04B 7/0626 (2013.01); H04B 7/145 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A method of controlling a communication channel of a wireless communication system, the wireless communication system comprising a reflective surface having an irregular arrangement of reflective elements, the method comprising:
generating a first topology matrix based on an initial structure of the reflective surface;
determining a beamforming design and corresponding user sum-rate based on estimated channel matrices for a communication path;
generating a plurality of second topology matrices corresponding to a structure of the reflective surface that is varied from the initial structure by a configuration of at least one reflective element;
forming a beamforming design for each of the plurality of second topology matrices;
calculating a user sum-rate for each of the plurality of second topology matrices; and
selecting, from the plurality of second topology matrices, a new topology matrix based on the calculated user sum-rates.