公开(公告)号：US11683772B2

公开(公告)日：2023-06-20

申请号：US17249792

申请日：2021-03-12

Applicant: Cisco Technology, Inc.

Inventor： David A. Maluf ,  Alexander X. Ke ,  Amr Elnakeeb

IPC: H04W56/00

CPC classification number: H04W56/0035 ,  H04W56/001

Abstract: Embodiments include detection of physical events associated with a wireless network, where the detected physical events are associated with the measurable effects on radio signals between devices in the wireless network. The detected physical event and associated radio signal information is used to provide precise low cost time synchronization for a device in a network.

公开(公告)号：US11092664B2

公开(公告)日：2021-08-17

申请号：US16740158

申请日：2020-01-10

Applicant: Cisco Technology, Inc.

Inventor： David A. Maluf ,  Amr Elnakeeb ,  David Delano Ward

IPC: G01S5/02 ,  H04B3/52 ,  H04W24/02 ,  H04W64/00 ,  H04B3/54 ,  G01S5/06

Abstract: In one embodiment, a service receives signal characteristic data indicative of characteristics of wireless signals received by one or more antennas located in a particular area. The service uses the received signal characteristic data as input to a Bayesian inference model to predict physical states of an object located in the particular area. A physical state of the object is indicative of at least one of: a mass, a velocity, an acceleration, a surface area, or a location of the object. The service updates the Bayesian inference model based in part on the predicted state of the object and a change in the received signal characteristic data and based in part by enforcing Newtonian motion dynamics on the predicted physical states.