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公开(公告)号：US08995832B2
公开(公告)日：2015-03-31
申请号：US13855104
申请日：2013-04-02
Applicant: NEC Laboratories America, Inc. , NEC Corporation
Inventor： Philip N. Ji , Yoshiaki Aono , Ting Wang
CPC classification number: H04J14/0212 , H04J14/0204 , H04J14/0205 , H04J14/0206 , H04J14/0217
Abstract: The present principles are directed to a transponder aggregator-based optical loopback in a multi-degree colorless, directionless, contention-less, reconfigurable optical add/drop multiplexer. The multiplexer includes a reconfigurable optical add/drop multiplexer section for performing connect operations for wavelength division multiplexing signals among all degrees. The section has a plurality of subsections. Each of the subsections corresponds to a respective one of the degrees and has an optical separator at an input side and an optical combiner at an output side. The multiplexer further includes a transponder aggregator section having a split-and-select switch-based transponder aggregator. The multiplexer also includes an optical line loopback having a connection path between the optical separator at the input side and the optical combiner at the output side of at least one of the subsections.
Abstract translation: 本原理涉及在多度无色，无方向，无竞争的可重配置的光分插复用器中的基于转发器聚合器的光环回。 复用器包括可重配置的光分插复用器部分，用于在所有度之间执行波分复用信号的连接操作。 该部分有多个子部分。 每个子部分对应于相应的度数，并且在输入侧具有光学分离器，在输出侧具有光学合成器。 多路复用器还包括具有分组选择基于交换机的应答器聚合器的转发器聚合器部分。 复用器还包括具有在输入侧的光学分离器与至少一个子部分的输出侧的光学组合器之间的连接路径的光学线路环回。
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12.发明申请公开(公告)号：US20130259475A1
公开(公告)日：2013-10-03
申请号：US13855384
申请日：2013-04-02
Applicant: NEC LABORATORIES AMERICA, INC. , NEC CORPORATION
Inventor： Philip N. Ji , Ryuji Aida , Ting Wang
IPC: H04Q11/00
CPC classification number: H04Q11/0005 , H04L12/28 , H04Q11/00 , H04Q2011/0016
Abstract: Methods and systems for optical communication in a submarine network are provided. An input signal is received from a terminal at a reconfigurable branching unit (BU), and the input signal is split into at least two parts, with one part being associated with one or more trunk terminals and another part being associated with one or more branch terminals. Each of one or more spectrum channels are selected and individually switched to one of a plurality of paths using at least one wavelength selective switch (WSS), with the at least one WSS being configured to transmit the one or more spectrum channels to their respective target output port and to combine signals switched to a specific port into a wavelength division multiplexing (WDM) signal. Individual spectrum channels are filtered out using at least one wavelength blocker (WB).
Abstract translation: 提供了海底网络光通信的方法和系统。 在可重构分支单元（BU）处从终端接收输入信号，并且将输入信号分成至少两部分，其中一部分与一个或多个中继终端相关联，另一部分与一个或多个分支 终端。 使用至少一个波长选择开关（WSS）来选择一个或多个频谱信道中的每一个并且单独地切换到多个路径中的一个，其中所述至少一个WSS被配置为将一个或多个频谱信道发送到它们各自的目标 输出端口并将切换到特定端口的信号组合成波分复用（WDM）信号。 使用至少一个波长阻挡器（WB）滤除各个频谱通道。
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公开(公告)号：US12154007B2
公开(公告)日：2024-11-26
申请号：US16229676
申请日：2018-12-21
Applicant: NEC Laboratories America, Inc.
Inventor： Ming-Fang Huang , Ting Wang
Abstract: A fiber-based roadside condition sensing system is provided. The system includes a fiber optic cable arranged in various roadside locations for Distributed Vibration Sensing (DVS) and Distributed Acoustic Sensing (DAS) at the various roadside locations. The 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.
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公开(公告)号：US12111189B2
公开(公告)日：2024-10-08
申请号：US17221822
申请日：2021-04-04
Applicant: NEC Laboratories America, Inc.
Inventor： Ming-Fang Huang , Ting Wang , Shaobo Han
CPC classification number: G01D5/353 , G01D5/35361 , G01D5/35364 , G01H9/004 , G06V20/58 , G08B21/18
Abstract: Aspects of the present disclosure describe distributed fiber optic sensing (DFOS) systems, methods, and structures that advantageously identify location(s) of construction—or other activities—taking place along fiber optic cable routes that can damage the fiber optic cables.
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公开(公告)号：US12047242B2
公开(公告)日：2024-07-23
申请号：US18481988
申请日：2023-10-05
Applicant: NEC Laboratories America, Inc.
IPC: H04L41/0896 , H04L41/122
CPC classification number: H04L41/0896 , H04L41/122
Abstract: Described is a novel framework, we call intent-based computing jobs assignment framework, for efficiently accommodating a clients' computing job requests in a mobile edge computing infrastructure. We define the intent-based computing job assignment problem, which jointly optimizes the virtual topology design and virtual topology mapping with the objective of minimizing the total bandwidth consumption. We use the Integer Linear Programming (ILP) technique to formulate this problem, and to facilitate the optimal solution. In addition, we employ a novel and efficient heuristic algorithm, called modified Steiner tree-based (MST-based) heuristic, which coordinately determines the virtual topology design and the virtual topology mapping. Comprehensive simulations to evaluate the performance of our solutions show that the MST-based heuristic can achieve an efficient performance that is close to the optimal performance obtained by the ILP solution.
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Patent Agency Ranking
公开(公告)号：US20240235668A1
公开(公告)日：2024-07-11
申请号：US18485198
申请日：2023-10-11
Applicant: NEC Laboratories America, Inc.
Inventor： Junqiang HU , Yue-Kai HUANG , Ting Wang
IPC: H04B10/073 , G01H9/00
CPC classification number: H04B10/073 , G01H9/004
Abstract: A fast optical fiber identification system and method employing an acoustic pen that is connected to a portable device (such as a laptop, a smartphone, an iPad). The pen generates acoustic signals under the control of the portable device. The portable device interacts with a DFOS (Distributed Fiber Optic Sensor, e.g., a DAS or DVS) interrogator to notify the interrogator about the generated signals and receives a detection result from the interrogator. The result is either illustrated using a graph on the portable device, or as a tone of different volume, to indicate the strength of the pen's signal detected by the interrogator. As the pen touches/excites vibrationally/acoustically each of the fibers, the portable device notifies the user about the detected signal's strength or presence/no-presence, which allows a technician to quickly identify the fiber of interest.
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公开(公告)号：US12028110B2
公开(公告)日：2024-07-02
申请号：US17713171
申请日：2022-04-04
Applicant: NEC Laboratories America, Inc.
CPC classification number: H04B10/27 , H04Q11/0062 , H04Q2011/009
Abstract: A procedure to solve the DFOS placement problem that uses a genetic algorithm to achieve a global optimization of sensor placement. First, our procedure according to aspects of the present disclosure defines a fitness function that counts the number of DFOS sensors used. Second, the procedure uses a valid DFOS placement assignment to model an individual in the genetic algorithm. Each individual consists of N genes, where N is the number of nodes in the given network infrastructure, e.g., N=|V|. Each gene has two genomes: (1) a list of 0s and/or 1s, in which is represent the network nodes that are equipped with DFOS sensors, and 0s represent the nodes that are not equipped with DFOS sensors; (2) a list of sensing fiber routes. An individual that has smallest number of is in their genes will be considered as the strongest individual. Thirdly, the procedure randomly generates a population of individuals. After a certain number of generations of population, the strongest individual in the last generation will be the global optima for the DFOS placement assignment.
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公开(公告)号：US11881688B2
公开(公告)日：2024-01-23
申请号：US17717088
申请日：2022-04-10
Applicant: NEC Laboratories America, Inc.
Inventor： Yangmin Ding , Sarper Ozharar , Yuandu Xu , Yue Tian , Ting Wang
CPC classification number: H02G1/02 , G01D5/35354 , G01S19/01
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).
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19.发明授权公开(公告)号：US11754612B2
公开(公告)日：2023-09-12
申请号：US17719322
申请日：2022-04-12
Applicant: NEC Laboratories America, Inc.
Inventor： Yangmin Ding , Sarper Ozharar , Yue Tian , Ting Wang
CPC classification number: G01R31/085 , G01H9/004
Abstract: Distributed fiber optic sensing (DFOS) systems and methods for monitoring electrical power distribution transformers and locating failing/failed/malfunctioning transformers from humming signals indicative of a transformer's operational integrity and are advantageously detected/analyzed via DFOS mechanisms.
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公开(公告)号：US11742939B2
公开(公告)日：2023-08-29
申请号：US17496722
申请日：2021-10-07
Applicant: NEC Laboratories America, Inc.
IPC: H04B10/032
CPC classification number: H04B10/032
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 fiber failures.
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