US 12,469,967 B2
Traffic and user aware physical layer shielding for secure teleworker using reconfigurable intelligent surface device
John Matthew Swartz, Lithia, FL (US); Nagendra Kumar Nainar, Morrisville, NC (US); Carlos M. Pignataro, Cary, NC (US); Matthew Aaron Silverman, Shaker Heights, OH (US); and Ardalan Alizadeh, Milpitas, CA (US)
Assigned to CISCO TECHNOLOGY, INC., San Jose, CA (US)
Filed by Cisco Technology, Inc., San Jose, CA (US)
Filed on Feb. 23, 2022, as Appl. No. 17/678,154.
Prior Publication US 2023/0268650 A1, Aug. 24, 2023
Int. Cl. H01Q 3/46 (2006.01); H04B 1/04 (2006.01); H04B 7/0426 (2017.01); H04W 12/02 (2009.01); H04W 56/00 (2009.01); H04W 72/23 (2023.01)
CPC H01Q 3/46 (2013.01) [H04B 7/043 (2013.01); H04W 12/02 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A system comprising:
at least one wireless access point configured to serve at least one wireless client device in a wireless network;
a reconfigurable intelligent surface device configured to reflect transmissions, wherein the reconfigurable intelligent surface device comprises an array of sub-wavelength electromagnetic energy reflecting elements whose reflectivity characteristics are controlled by changing an impedance; and
a controller that configures the reconfigurable intelligent surface device to reflect a transmission, made by the at least one wireless access point or by the at least one wireless client device, towards a first location, wherein the controller dynamically computes coefficients used to control reflection, refraction and consumption of transmissions by the reconfigurable intelligent surface device, based on a location of the at least one wireless access point and a location of the at least one wireless client device.