公开(公告)号：US10382161B2

公开(公告)日：2019-08-13

申请号：US15118443

申请日：2015-02-11

Applicant: UNIVERSITY OF WASHINGTON

Inventor： Shyamnath Gollakota ,  Joshua R. Smith ,  David Wetherall ,  Bryce Kellogg ,  Aaron N. Parks

IPC: H04B1/04 ,  H04L1/00 ,  H02J50/00 ,  H02J3/38 ,  H04W4/70 ,  H04W84/12

Abstract: Example devices described herein include endpoint devices which may communicate with an access point device by modulating a channel associated with the wireless communication to encode transmit data. The channel modulation may be performed by utilizing a switch to control an impedance of an antenna at the endpoint device to either reflect or absorb wireless network communication signals received by the endpoint device. The access point device may extract the transmit data by decoding changes in the channel caused, at least in part, by the modulation. Access point devices may transmit a pattern of packets—the presence or absence of which may correspond with transmit data. Endpoint devices may decode this data by using an energy detector to differentiate between the presence or absence of a packet.

公开(公告)号：US10187177B2

公开(公告)日：2019-01-22

申请号：US15118443

申请日：2015-02-11

Applicant: UNIVERSITY OF WASHINGTON

Inventor： Shyamnath Gollakota ,  Joshua R. Smith ,  David Wetherall ,  Bryce Kellogg ,  Aaron N. Parks

IPC: H04B1/04 ,  H04L1/00 ,  H02J50/00 ,  H02J3/38 ,  H04W4/70 ,  H04W84/12

Abstract: Example devices described herein include endpoint devices which may communicate with an access point device by modulating a channel associated with the wireless communication to encode transmit data. The channel modulation may be performed by utilizing a switch to control an impedance of an antenna at the endpoint device to either reflect or absorb wireless network communication signals received by the endpoint device. The access point device may extract the transmit data by decoding changes in the channel caused, at least in part, by the modulation. Access point devices may transmit a pattern of packets—the presence or absence of which may correspond with transmit data. Endpoint devices may decode this data by using an energy detector to differentiate between the presence or absence of a packet.

公开(公告)号：US20170180075A1

公开(公告)日：2017-06-22

申请号：US15118443

申请日：2015-02-11

Applicant: UNIVERSITY OF WASHINGTON

Inventor： Shyamnath Gollakota ,  Joshua R. Smith ,  David Wetherall ,  Bryce Kellogg ,  Aaron N. Parks

IPC: H04L1/00 ,  H02J3/38

CPC classification number: H04L1/0002 ,  H02J3/382 ,  H02J3/383 ,  H02J50/00 ,  H04Q2213/1308 ,  H04Q2213/13298 ,  H04W4/70 ,  H04W84/12

Abstract: Example devices described herein include endpoint devices which may communicate with an access point device by modulating a channel associated with the wireless communication to encode transmit data. The channel modulation may be performed by utilizing a switch to control an impedance of an antenna at the endpoint device to either reflect or absorb wireless network communication signals received by the endpoint device. The access point device may extract the transmit data by decoding changes in the channel caused, at least in part, by the modulation. Access point devices may transmit a pattern of packets—the presence or absence of which may correspond with transmit data. Endpoint devices may decode this data by using an energy detector to differentiate between the presence or absence of a packet.