公开(公告)号：US09054829B2

公开(公告)日：2015-06-09

申请号：US13939608

申请日：2013-07-11

Applicant: NEC Laboratories America, Inc.

Inventor： Ankitkumar Patel ,  Philip Ji ,  Daisuke Taniguchi ,  Yoshiaki Aono

IPC: H04J14/02

CPC classification number: H04J14/0227 ,  H04J14/0224 ,  H04J14/0257 ,  H04J14/026 ,  H04J14/0267

Abstract: A spectrum-aware rate selection includes finding a set of channels based on spectrum availability information such that the total required spectrum for a requested data rate of a traffic demand is minimized.

Abstract translation: 频谱感知速率选择包括基于频谱可用性信息找到一组信道，使得对业务需求的请求数据速率的总需求频谱最小化。

公开(公告)号：US20150125152A1

公开(公告)日：2015-05-07

申请号：US14534312

申请日：2014-11-06

Applicant: NEC Laboratories America, Inc.

Inventor： Philip Ji ,  Ting Wang

IPC: H04B10/40 ,  H04J14/00

CPC classification number: H04J14/02 ,  H04B10/5561 ,  H04Q11/0005 ,  H04Q2011/0015 ,  H04Q2011/0047

Abstract: A multi direction variable transceiver including a transmitter comprising a subcarrier aggregator including at least one variable transmitter splitter and at least one variable transmitter coupler. The transceiver typically includes a receiver having at least one variable receiver splitter and at least one variable receiver coupler. In some examples, each of the transmitter and the receiver may include a controller for dynamically adjusting a splitting ratio for at least one of the variable receiver splitter, variable receiver coupler, variable transmission splitter and variable transmission coupler.

Abstract translation: 一种多方向可变收发器，包括发射机，包括包括至少一个可变发射机分离器和至少一个可变发射机耦合器的子载波聚合器。 收发器通常包括具有至少一个可变接收机分离器和至少一个可变接收机耦合器的接收机。 在一些示例中，发射机和接收机中的每一个可以包括用于动态地调整可变接收机分离器，可变接收机耦合器，可变传输分配器和可变传输耦合器中的至少一个的分束比的控制器。

公开(公告)号：US20140029939A1

公开(公告)日：2014-01-30

申请号：US13951461

申请日：2013-07-26

Applicant: NEC Laboratories America, Inc.

Inventor： Ankitkumar Patel ,  Philip Ji ,  Jason Jue

IPC: H04B10/07

CPC classification number: H04B10/07 ,  H04J14/0257 ,  H04J14/026

Abstract: A method for blocking estimation to evaluate connection blocking in flexible optical wavelength division multiplexing WDM networks includes a novel Markovian model to analyze the steady state probabilities and connection blocking probability along a fiber in FWDM networks and finding the state dependent arrival rate for each type of line rate on a fiber

Abstract translation: 一种用于阻止估计以评估柔性光波分复用WDM网络中的连接阻塞的方法包括一种新颖的马尔可夫模型，用于分析FWDM网络中的光纤的稳态概率和连接阻塞概率，并找出每种类型线路的状态依赖到达速率 光纤上的速率

公开(公告)号：US12160261B2

公开(公告)日：2024-12-03

申请号：US18075374

申请日：2022-12-05

Applicant: NEC Laboratories America, Inc.

Inventor： Philip Ji ,  Ting Wang ,  Zilong Ye

IPC: H04B10/032 ,  H04J14/02

Abstract: Aspects of the present disclosure describe distributed fiber optic sensor systems, methods, and structures that advantageously enable/provide for the proper placement/assignment of sensors in the DFOS network to provide for high reliability, fault tolerant operation that survives multiple fiber failures.

公开(公告)号：US12055803B2

公开(公告)日：2024-08-06

申请号：US17316621

申请日：2021-05-10

Applicant: NEC Laboratories America, Inc.

Inventor： Ezra Ip ,  Yue-Kai Huang ,  Philip Ji ,  Shuji Murakami

IPC: G01M11/00 ,  G01H9/00 ,  G02F1/125 ,  G01D5/353 ,  H04B10/071

CPC classification number: G02F1/125 ,  G01H9/004 ,  G01D5/35361 ,  G01M11/00 ,  G01M11/3109 ,  G01N2201/0886 ,  H04B10/071

Abstract: Aspects of the present disclosure describe improved distributed acoustic sensing using dynamic range suppression of optical time domain reflectometry either by using a feedback loop comprising optical and electrical elements or using a nonlinear element in the electrical domain after coherent detection. When using a feedback loop, the amplitude of the periodic waveform of coherent OTDR can be inverted. This allows optical pre-compensation of the received optical signal before coherent detection with the goal of minimizing amplitude dynamic range. Alternatively, a nonlinear element in the electrical domain can reduce amplitude dynamic range before sampling by analog-to-digital converters (ADC).

公开(公告)号：US12051326B2

公开(公告)日：2024-07-30

申请号：US17575610

申请日：2022-01-13

Applicant: NEC Laboratories America, Inc.

Inventor： Shaobo Han ,  Ming-Fang Huang ,  Philip Ji ,  Yueheng Chen ,  Milad Salemi

IPC: G08G1/04 ,  G06V10/48 ,  G08G1/01

CPC classification number: G08G1/04 ,  G06V10/48 ,  G08G1/0116 ,  G08G1/0133 ,  G08G1/0145

Abstract: Aspects of the present disclosure describe DFOS systems, methods, and structures that advantageously extract road traffic from DFOS vibration patterns such that anomaly detection is possible. Sensed vibration data is represented accurately as a set of points, where each point is denoted as a tuple with elements indicating a time stamp, a location along a length of a DFOS optical sensing cable, and vibration strength detected at the location at the time. Traffic pattern detection is based on a progressive probabilistic Hough transform (PPHT) that exploits global information from an entire spatial-temporal data snapshot to assess a cause of detected vibrations.

公开(公告)号：US12007579B2

公开(公告)日：2024-06-11

申请号：US17081900

申请日：2020-10-27

Applicant: NEC Laboratories America, Inc.

Inventor： Giovanni Milione ,  Philip Ji ,  Eric Cosatto

IPC: G02B27/28 ,  G06F18/214 ,  G06F18/24 ,  G06V10/764 ,  G06V10/82

CPC classification number: G02B27/283 ,  G06F18/214 ,  G06F18/24 ,  G06V10/764 ,  G06V10/82

Abstract: Aspects of the present disclosure describe systems, methods, and structures for the machine learning based regression of complex coefficients of a linear combination of spatial modes from a multimode optical fiber.

公开(公告)号：US10931366B2

公开(公告)日：2021-02-23

申请号：US16830160

申请日：2020-03-25

Applicant: NEC Laboratories America, Inc.

Inventor： Ting Wang ,  Ming-Fang Huang ,  Tiejun Xia ,  Glenn Wellbrock ,  Yaowen Li ,  Philip Ji

IPC: H04B10/071 ,  G01M11/00 ,  G01D5/353 ,  H04B10/40 ,  H04B10/2575 ,  H04B10/27

Abstract: Aspects of the present disclosure describe optical fiber sensing systems, methods and structures disclosing a distributed fiber sensor network constructed on an existing, live network, data carrying, optical fiber telecommunications infrastructure to detect temperatures, acoustic effects, and vehicle traffic—among others. Of particular significance, sensing systems, methods, and structures according to aspects of the present disclosure may advantageously identify specific network locations relative to manholes/handholes and environmental conditions within those manholes/handholes namely, normal, flooded, frozen/iced, etc.

公开(公告)号：US09654247B2

公开(公告)日：2017-05-16

申请号：US14613743

申请日：2015-02-04

Applicant: NEC Laboratories America, Inc.

Inventor： Ankitkumar Patel ,  Philip Ji

IPC: H04J14/00 ,  H04J14/02 ,  H04L12/721 ,  H04B10/00

CPC classification number: H04J14/0256 ,  H04B10/00 ,  H04J14/0212 ,  H04J14/0224 ,  H04J14/0257 ,  H04J14/0258 ,  H04J14/0271 ,  H04L45/12 ,  H04L45/62

Abstract: There is provided a distance-adaptive and fragmentation-aware all-optical traffic grooming (DFG) method, which addresses the all-optical traffic grooming problem while considering the transmission reach constraints. The DFG procedure provisions traffic demands in optical channels such that the spectrum requires for guard bands is minimized. The DFG procedure provisions optical channels such that network fragmentation is minimized while ensuring the transmission reach constrains over flexible-grid WDM networks.

公开(公告)号：US09602427B2

公开(公告)日：2017-03-21

申请号：US14547732

申请日：2014-11-19

Applicant: NEC Laboratories America, Inc.

Inventor： Ankitkumar Patel ,  Philip Ji

IPC: G06F15/173 ,  H04L12/911 ,  H04L29/08 ,  G06F21/57 ,  H04L12/715 ,  H04L12/735

CPC classification number: H04L47/728 ,  G06F21/577 ,  H04L45/1287 ,  H04L45/64 ,  H04L67/10

Abstract: A method and apparatus are provided for embedding cloud demands with shared protection in a software-defined flexible-grid optical transport network. The method includes mapping working virtual nodes of the cloud demands over physical nodes of the network. The method further includes mapping backup virtual nodes of the cloud demands over the physical nodes. The method also includes mapping working virtual links of the cloud demands over physical routes of the network. The method additionally includes mapping backup virtual links of the cloud demands over the physical routes. The mapping steps are performed by an optical-defined controller having a processor.