公开(公告)号：US11652552B2

公开(公告)日：2023-05-16

申请号：US17147379

申请日：2021-01-12

Applicant: NEC Laboratories America, Inc.

Inventor： Ming-Fang Huang ,  Ting Wang

IPC: H04B10/25 ,  H04W84/18 ,  H04L67/12 ,  H04W4/90 ,  H04W4/02

CPC classification number: H04B10/25 ,  H04L67/12 ,  H04W4/023 ,  H04W4/90 ,  H04W84/18

Abstract: Aspects of the present disclosure describe systems, methods and structures providing detection and localization of disaster-related indoor events via hybrid ethernet/optical fiber cable.

公开(公告)号：US11562646B2

公开(公告)日：2023-01-24

申请号：US17221836

申请日：2021-04-04

Applicant: NEC Laboratories America, Inc.

Inventor： Yuheng Chen ,  Ming-Fang Huang ,  Ting Wang ,  Jingnan Zhao

IPC: G08G1/04 ,  G08G1/01 ,  G06N20/00 ,  G01H9/00

Abstract: An advance in the art is made according to aspects of the present disclosure directed to distributed fiber optic sensing systems (DFOS), methods, and structures that advantageously monitor and identify—in real-time—roadway traffic and patterns across a multiple-lane highway by employing a multiple-transverse fiber optic cable arrangement of optical fiber cable positioned under the highway/roadway to detect, monitor, and/or identify traffic.

公开(公告)号：US20220326070A1

公开(公告)日：2022-10-13

申请号：US17716403

申请日：2022-04-08

Applicant: NEC Laboratories America, Inc.

Inventor： Yangmin Ding ,  Yue Tian ,  Sarper Ozharar ,  Yuanda Xu ,  Ting Wang

IPC: G01H9/00 ,  G06N3/08 ,  G06N3/04 ,  G06N20/20

Abstract: Systems and methods for reducing work conflicts is provided. The method includes receiving a vibrational signal from a utility pole; identifying a location and type of field work on the utility pole from one or more features of the vibrational signal utilizing a trained neural network; and communicating the location and type of field work to a third party.

公开(公告)号：US11422146B2

公开(公告)日：2022-08-23

申请号：US17221805

申请日：2021-04-04

Applicant: NEC Laboratories America, Inc.

Inventor： Ming-Fang Huang ,  Ting Wang

IPC: G01P5/00

Abstract: Aspects of the present disclosure describe distributed fiber optic sensing (DFOS) systems, methods, and structures that advantageously measure wind speed at utility poles that support fiber optic cables and—in many applications—electrical and/or other communications cables (i.e., cable television).

公开(公告)号：US20220236105A1

公开(公告)日：2022-07-28

申请号：US17583168

申请日：2022-01-24

Applicant: NEC Laboratories America, Inc.

Inventor： Sarper Ozharar ,  Yue Tian ,  Ting Wang ,  Yangmin Ding

IPC: G01H9/00 ,  G01D5/353

Abstract: An advance in the art is made according to aspects of the present disclosure directed to the detection and localization of a substantially static weight situated on aerial telecommunications fiber optic cable through the effect of phase-distributed acoustic sensing (ϕ-DAS) and signal analysis of ambient data. In sharp contrast to the prior art, our inventive method does not require a special optical fiber arrangement or type of fiber nor is it susceptible to range limitations that plague the prior art.

公开(公告)号：US11387898B2

公开(公告)日：2022-07-12

申请号：US17035551

申请日：2020-09-28

Applicant: NEC Laboratories America, Inc.

Inventor： Ting Wang ,  Ming-Fang Huang ,  Yaowen Li ,  Philip Ji

IPC: H04B10/079 ,  G01D5/353

Abstract: Aspects of the present disclosure describe optical fiber sensing systems, methods and structures disclosing a distributed optical fiber sensor network constructed on a switched optical fiber telecommunications infrastructure to detect temperatures, acoustic effects, and vehicle traffic—among others—demonstrated with a number of different network topologies.

公开(公告)号：US11366231B2

公开(公告)日：2022-06-21

申请号：US16660699

申请日：2019-10-22

Applicant: NEC Laboratories America, Inc.

Inventor： Ming-Fang Huang ,  Yuheng Chen ,  Ting Wang

IPC: G01S19/03 ,  G01H9/00

Abstract: Aspects of the present disclosure describe systems, methods and structures for determining any location on a deployed fiber cable from an optical time domain reflectometry (OTDR) curve using a movable mechanical vibration source to stimulate tiny vibration of fiber in deployed fiber cable along the cable route and a fiber sensing system at a central office to detect the vibration(s). Latitude and longitude of the location(s) of the vibration source is measured with a GPS device and a dynamic-OTDR distance is measured at central office (CO) simultaneously. The collected GPS location data and corresponding dynamic-OTDR distance data are paired and saved into a database. This saved data may be processed to graphically overlie a map thereby providing exact cable location on the map thereby providing carriers/service providers the ability to improve fiber fault location on a deployed fiber cable much faster and more accurately than presently possible using methods available in the art.

公开(公告)号：US10761014B2

公开(公告)日：2020-09-01

申请号：US14931568

申请日：2015-11-03

Applicant: NEC Laboratories America, Inc.

Inventor： Neda Cvijetic ,  Giovanni Milione ,  Ting Wang

IPC: G01N21/17 ,  G01S7/48 ,  G01S7/481 ,  G01S17/89

Abstract: A method and system for remote sensing using optical orbital angular momentum (OAM)-based spectroscopy for object recognition. The method includes applying an OAM state on a light beam to generate an optical OAM spectrum, transmitting the light beam on a remote object, receiving a reflected optical OAM spectrum associated with the remote object, and providing a high resolution image of the remote object based on the reflected optical OAM spectrum.

公开(公告)号：US10574448B2

公开(公告)日：2020-02-25

申请号：US15897930

申请日：2018-02-15

Applicant: NEC Laboratories America, Inc.

Inventor： Ivan Djordjevic ,  Ting Wang ,  Shaoliang Zhang

IPC: H04L29/06 ,  H04L9/08 ,  H04B10/70 ,  H04J14/02 ,  H04B10/11 ,  H01Q3/26 ,  H01Q3/28 ,  H01Q3/38 ,  H04L27/34 ,  H04J14/04 ,  H04B10/516 ,  H01Q3/34 ,  H01Q21/00 ,  H04L27/36 ,  H04L27/38 ,  H04B7/0413 ,  H04B10/50

Abstract: Systems and methods for quantum key distribution using orbital angular momentum (OAM)-modes-enabled secure multidimensional coded modulation. The quantum key distribution including symbols of a raw key across subcarriers and multiplexing the subcarriers to form an electrical carrier. Then optically modulating the electrical carrier with an electro-optical modulator using an optical signal. The optically modulated electrical carrier is then imposed on a pre-determined OAM mode using an optical OAM multiplexer, attenuated, and transmitted across a quantum channel. A receiver then receives the transmitted signal and demultiplexes it with an optical OAM demultiplexer to extract projections. The projections then undergo optical-to-electrical conversion using a coherent optical detector with an optical signal from a local oscillator. A resulting estimated electrical carrier is then demultiplexed into subcarriers. The subcarrier undergo phase noise cancellation and subsequent demodulation to extract estimated symbol constellation points corresponding the symbols of the raw key.

公开(公告)号：US20190236920A1

公开(公告)日：2019-08-01

申请号：US16229574

申请日：2018-12-21

Applicant: NEC Laboratories America, Inc.

Inventor： Ming-Fang Huang ,  Ting Wang

IPC: G08B13/22 ,  G01V1/00 ,  G01V1/22 ,  G06N20/00 ,  G08B19/00 ,  G08B25/08 ,  H04B10/85 ,  H04B10/27

CPC classification number: G08B13/22 ,  G01V1/001 ,  G01V1/226 ,  G06N5/04 ,  G06N20/00 ,  G08B19/00 ,  G08B25/08 ,  H04B10/27 ,  H04B10/85

Abstract: A security system is provided for a building. The security system includes a fiber optic cable arranged in various locations in the building for Distributed Vibration Sensing (DVS) and Distributed Acoustic Sensing (DAS) at the various locations. The security system further includes a machine-learning-based analyzer for selectively providing any of an early warning and a prevention of various detected conditions responsive to a machine-learning-based analysis of results from the DVS and the DAS.