公开(公告)号：US20130094851A1

公开(公告)日：2013-04-18

申请号：US13654960

申请日：2012-10-18

Applicant: NEC Laboratories America, Inc. ,  NEC Corporation

Inventor： Lei Xu ,  Shaoliang Zhang ,  Fatih Yaman ,  Ting Wang ,  Yoshihisa Inada ,  Takaaki Ogata ,  Yasuhiro Aoki

IPC: H04B10/08

CPC classification number: H04B10/07957 ,  H04B10/07 ,  H04B10/07953 ,  H04B10/2507 ,  H04B10/25073 ,  H04B10/2543 ,  H04B2210/254

Abstract: A method includes evaluating an optical signal spectrum for estimated filtering parameters of an optical spectral filtering device for shaping optical signal spectrum, determining a feedback for fine tuning the optical spectral filtering device for nonlinearity tolerance enhancement in the optical transmission system, responsive to received optical signal quality in the optical signal spectrum; and using the feedback to adjust said optical spectral filtering device for predetermined shaping and predetermined fiber nonlinearity tolerance in the optical transmission system.

Abstract translation: 一种方法包括评估用于光谱滤波装置的估计滤波参数的光信号频谱，用于整形光信号频谱，确定用于微光调整光谱滤波装置的反馈以对光传输系统中的非线性容限增强响应于接收到的光信号 光信号光谱质量; 并且使用所述反馈来调整所述光谱滤波装置以用于所述光传输系统中的预定成形和预定的光纤非线性公差。

公开(公告)号：US20130089323A1

公开(公告)日：2013-04-11

申请号：US13644470

申请日：2012-10-04

Applicant: NEC Laboratories America, Inc.

Inventor： Ankitkumar N. Patel ,  Philip Nan Ji ,  Ting Wang ,  Yoshiaki Aono

IPC: H04J14/02

CPC classification number: H04J14/02 ,  H04B10/0793 ,  H04B10/07953 ,  H04B10/299 ,  H04J14/021 ,  H04J14/0227 ,  H04J14/0271

Abstract: A method for optimal combined 2R/3R regenerators placement for optical transmission includes determining an optimal placement of multiple 2R and 3R regenerators that minimizes bit error rate BER at a destination node, determining an optimal number of the 2R and 3R regenerators that minimizes a total cost while satisfying the BER at the destination node, and determining an optimal placement of the 2R and 3R regenerators along a route in the optical transmission.

Abstract translation: 用于光传输的最佳组合的2R / 3R再生器放置的方法包括确定最小化目的地节点处的误码率BER的多个2R和3R再生器的最佳布置，确定最小化总成本的2R和3R再生器的最佳数量 同时满足目的地节点处的BER，并且确定2R和3R再生器沿着光传输中的路由的最佳放置。

公开(公告)号：US20130077972A1

公开(公告)日：2013-03-28

申请号：US13628320

申请日：2012-09-27

Applicant: NEC LABORATORIES AMERICA, INC.

Inventor： Jingjing Zhang ,  Ting Wang ,  Naoto Maeda

IPC: H04L12/12

CPC classification number: H04L12/12 ,  H04Q11/0067 ,  H04Q2011/0079 ,  Y02D50/40 ,  Y02D50/42

Abstract: A method sets certain downstream traffic scheduling rules at an optical line terminal OLT and certain sleep control rules at optical network units ONUs. Both downstream traffic scheduling rules and sleep control rules are common information owned by both the OLT and ONUs. The method sets the traffic scheduling rules that each ONU is allocated with some time slots every cycle if the ONU has downstream traffic. Rather than using a control message to notify ONUs with their queue status, the method lets ONUs infer whether its downstream queue is empty or not based on downstream traffic scheduling and lets the OLT infer the status of an ONU based on sleep control rules.

Abstract translation: 一种方法在光线路终端OLT设置某些下行流量调度规则，并在光网络单元ONU设置某些睡眠控制规则。 下行流量调度规则和睡眠控制规则都是OLT和ONU拥有的常用信息。 如果ONU具有下行流量，则该方法每个周期设置每个ONU分配了一些时隙的流量调度规则。 该方法不是使用控制消息通知其具有队列状态的ONU，而是使ONU根据下游业务调度来推断其下行队列是否为空，并允许OLT根据睡眠控制规则来推断ONU的状态。

公开(公告)号：US12072233B2

公开(公告)日：2024-08-27

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 ,  G06N3/04 ,  G06N3/08 ,  G06N20/20 ,  G06Q50/06

CPC classification number: G01H9/004 ,  G06N3/04 ,  G06N3/08 ,  G06N20/20 ,  G06Q50/06

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：US12051309B2

公开(公告)日：2024-07-30

申请号：US17579511

申请日：2022-01-19

Applicant: NEC Laboratories America, Inc.

Inventor： Ming-Fang Huang ,  Ting Wang

IPC: G08B13/186 ,  G01M11/00 ,  G02B6/35 ,  G08B13/08 ,  H04B10/071

CPC classification number: G08B13/186 ,  G01M11/31 ,  G02B6/3572 ,  G08B13/08 ,  H04B10/071

Abstract: Aspects of the present disclosure describe distributed fiber optic sensing (DFOS) systems, methods, and structures that advantageously extend DFOS techniques to anomaly detection using optical magnetism switches (OMC) that are integrated into the DFOS system.

公开(公告)号：US12025488B2

公开(公告)日：2024-07-02

申请号：US18126409

申请日：2023-03-25

Applicant: NEC Laboratories America, Inc.

Inventor： Junqiang Hu ,  Ting Wang

IPC: G01H9/00 ,  G01K11/32 ,  G01L1/24

CPC classification number: G01H9/004 ,  G01K11/32 ,  G01L1/242

Abstract: Distributed fiber optic sensing systems (DFOS) methods, and structures that employ DVS/DAS point sensors and a two-stage processing methodology/structure that advantageously enable point sensors to send sensor data at any time—thereby providing significant processing advantages over the prior art.

公开(公告)号：US20240055842A1

公开(公告)日：2024-02-15

申请号：US18492902

申请日：2023-10-24

Applicant: NEC Laboratories America, Inc.

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

IPC: H02G1/02 ,  G01S19/01 ,  G01D5/353

CPC classification number: H02G1/02 ,  G01S19/01 ,  G01D5/35354

Abstract: Systems and methods for performing the dynamic anomaly localization of utility pole aerial/suspended/supported wires/cables by distributed fiber optic sensing. In sharp contrast to the prior art, our inventive systems and methods according to aspects of the present disclosure advantageously identify a “location region” on a utility pole supporting an affected wire/cable, thereby permitting the identification and reporting of service personnel that are uniquely responsible for responding to such anomalous condition(s).

公开(公告)号：US11846569B2

公开(公告)日：2023-12-19

申请号：US17715002

申请日：2022-04-06

Applicant: NEC Laboratories America, Inc.

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

IPC: G01M7/08 ,  G01H9/00 ,  G01D5/353

CPC classification number: G01M7/08 ,  G01D5/35361 ,  G01H9/004

Abstract: A method of utility pole integrity assessment by distributed fiber optic sensing/distributed acoustic sensing (DFOS/DAS) employing existing telecommunications fiber optic cable as a sensor. The fiber optic cable is suspended aerially from a plurality of utility poles and a machine learning model is developed during training by mechanically exciting the utility poles. Once developed, and in sharp contrast to the prior art, the machine learning model—in conjunction with DFOS/DAS operation—determines an integrity assessment for a plurality of the utility poles aerially suspending the fiber optic cable from a mechanical impact of a single pole.

公开(公告)号：US11736867B2

公开(公告)日：2023-08-22

申请号：US17579516

申请日：2022-01-19

Applicant: NEC Laboratories America, Inc.

Inventor： Junqiang Hu ,  Ting Wang

IPC: H04R23/00 ,  G01H9/00 ,  H03G3/30 ,  H04R1/08 ,  H04R3/00

CPC classification number: H04R23/008 ,  G01H9/004 ,  H03G3/3005 ,  H04R1/08 ,  H04R3/00 ,  H03G2201/103 ,  H04R2430/01

Abstract: Aspects of the present disclosure describe DFOS/DAS systems, methods, and structures that employ active microphones to enhance DAS operational capabilities by using an active circuit to amplify acoustic signals including voice(s). The circuit includes a microphone to collect acoustic signal(s) resulting from voice signals in the environment, and a speaker or a vibration device driven by an amplifier. The circuit can be clipped onto the fiber, with direct contact through the speaker or vibration device. A microcontroller may advantageously be employed to control the circuit for reduced power consumption, by detecting activities locally and only enabling the speaker when needed. The microcontroller may also send other information such as battery status to the DFOS interrogator through vibration codes.

公开(公告)号：US11680849B2

公开(公告)日：2023-06-20

申请号：US17227313

申请日：2021-04-10

Applicant: NEC Laboratories America, Inc.

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

IPC: G06F30/23 ,  G01H9/00 ,  G08B21/18 ,  G06N20/00

CPC classification number: G01H9/004 ,  G08B21/182 ,  G06N20/00

Abstract: Aspects of the present disclosure describe distributed fiber optic sensing (DFOS) systems, methods, and structures that advantageously enable and/or facilitate the continuous monitoring and identification of damaged utility poles by employing a DFOS distributed acoustic sensing (DAS) methodology in conjunction with a finite element analysis and operational modal analysis. Of particular advantage and in further contrast to the prior art, systems, methods, and structures according to aspects of the present disclosure utilize existing optical fiber supported/suspended by the utility poles as a sensing medium for the DFOS/DAS operation.