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171.发明申请公开(公告)号：US20130170825A1
公开(公告)日：2013-07-04
申请号：US13628572
申请日：2012-09-27
Applicant: NEC Laboratories America, Inc.
Inventor： Junqiang Hu , Philip Nan Ji , Ting Wang , Yoshiaki Aono
IPC: H04B10/038
CPC classification number: H04B10/038 , H04B10/032
Abstract: In an optical communication system containing a primary line and backup line card, a method includes providing interfaces for the primary and backup line card, each line card including a transmitter and receiver; and selecting output from the transmitter from either the primary or back up line card including selecting the backup line card when the primary line card encounters a failure.
Abstract translation: 在包含主线路和备用线路卡的光通信系统中，一种方法包括提供用于主线路和备用线路卡的接口，每个线路卡包括发射机和接收机; 以及从主或备用线卡选择发射机的输出，包括当主线卡遇到故障时选择备用线路卡。
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172.发明申请NONBINARY LDPC CODED MODULATION WITHOUT BANDWIDTH EXPANSION FOR HIGH-SPEED OPTICAL TRANSMISSION 有权非线性LDPC编码调制，无高速光传输的带宽扩展公开(公告)号：US20130089326A1
公开(公告)日：2013-04-11
申请号：US13646392
申请日：2012-10-05
Applicant: NEC Laboratories America, Inc.
Inventor： IVAN B. DJORDJEVIC , Lei Xu , Ting Wang
CPC classification number: H04J14/04 , H04B10/5055 , H04J14/06
Abstract: Systems and methods for data transport, comprising encoding one or more streams of input data using nonbinary low density parity check (NB-LDPC) encoders, corresponding to orthogonal polarization states. Receiving one or more streams of input data using a buffer coupled to the encoders, the data written to the buffer bR bits at a time, where R is the code rate. Generating one or more signals using a 2b-ary mapper implemented as a look-up table (LUT) to store coordinates of a corresponding signal constellation, the 2b-ary mapper configured to assign bits of one or more signals to a signal constellation and to associate the bits of the signals with signal constellation points, wherein the constellation is expanded to avoid bandwidth expansion due to coding, generating substantial net coding gains within a same bandwidth. Modulating nonbinary LDPC-coded data streams using in-phase/quadrature (I/Q) modulators and multiplexing the data streams using polarization beam combiner.
Abstract translation: 用于数据传输的系统和方法，包括使用对应于正交极化状态的非二进制低密度奇偶校验（NB-LDPC）编码器来编码一个或多个输入数据流。 使用耦合到编码器的缓冲器接收一个或多个输入数据流，每次写入缓冲器bR位的数据，其中R是码率。 使用实现为查找表（LUT）的2b-ary映射器来存储一个或多个信号来存储相应信号星座的坐标，所述2b进制映射器被配置为将一个或多个信号的位分配给信号星座，并且 将信号的位与信号星座点相关联，其中扩展星座以避免由于编码而导致的带宽扩展，从而在相同带宽内产生实质的网络编码增益。 使用同相/正交（I / Q）调制器调制非二进制LDPC编码数据流，并使用偏振束组合器复用数据流。
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公开(公告)号：US12256002B2
公开(公告)日：2025-03-18
申请号：US17589863
申请日：2022-01-31
Applicant: NEC Laboratories America, Inc.
Inventor： Qiang Wang , Junqiang Hu , Jian Fang , Yaowen Li , Ting Wang
Abstract: Physimetric-based data security for coded distributed temperature sensing (DTS) in which physimetric information is extracted from a coded-DTS interrogator which is unique for each interrogator at each operating run time—and used to reconstruct a final temperature determination from DTS data. The physimetric information includes coded-DTS pulse code and coded-DTS pulse profile information as a key to permit secure sharing with authorized users. The pulse code and pulse profile information are encrypted and made available to an authorized user. The authorized user can then decrypt the pulse code and pulse profile information and subsequently use this key information (pulse profile and pulse code files) to retrieve temperature information from for example, a remote computer providing a continuous raw data feed—without being susceptible to eavesdropping. The pulse profile and pulse code files permit reconstruction of temperature from DTS continuous raw data feed which have no meaningful informational value to an eavesdropper who has no access to the unencrypted pulse profile and pulse code information.
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公开(公告)号：US12160090B2
公开(公告)日：2024-12-03
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
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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公开(公告)号：US12072244B2
公开(公告)日：2024-08-27
申请号：US17321464
申请日：2021-05-16
Applicant: NEC Laboratories America, Inc.
IPC: G01K11/32 , G01D5/353 , G01K11/322 , G01K11/324
CPC classification number: G01K11/322 , G01D5/35383 , G01K11/324
Abstract: Aspects of the present disclosure describe systems, methods, and structures for distributed temperature sensing that employ joint wavelet denoising to achieve desirable signal-to-noise ratio(s) over extended sensor fiber distances.
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Patent Agency Ranking
公开(公告)号：US11971294B2
公开(公告)日：2024-04-30
申请号：US17406022
申请日：2021-08-18
Applicant: NEC Laboratories America, Inc.
Abstract: Aspects of the present disclosure describe distributed fiber optic sensing (DFOS) systems, methods, and structures that employ a distributed fiber optic sensor placement procedure that advantageously provides a desirable sensor coverage over a network at minimal cost.
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公开(公告)号：US11733070B2
公开(公告)日：2023-08-22
申请号：US17684348
申请日：2022-03-01
Applicant: NEC LABORATORIES AMERICA, INC
Inventor： Yangmin Ding , Sarper Ozharar , Yue Tian , Ting Wang , Yuanda Xu
CPC classification number: G01D5/35358 , G01H9/004
Abstract: Distributed fiber optic sensing (DFOS)/distributed acoustic sensing (DAS) techniques coupled with frequency domain decomposition (FDD) are employed to determine the presence of 120 HZ operating power frequency to determine when street lights are energized and on thereby providing continuous status monitoring of the operational status of street lights and locating affected street lights at a particular utility pole location.
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公开(公告)号：US11686628B2
公开(公告)日：2023-06-27
申请号：US17227309
申请日：2021-04-10
Applicant: NEC Laboratories America, Inc.
Inventor： Ming-Fang Huang , Ting Wang
CPC classification number: G01K11/32 , F25D29/008 , G01K3/005 , G08B21/182 , F25D2700/12
Abstract: Aspects of the present disclosure describe distributed fiber optic sensing (DFOS) systems, methods, and structures that advantageously enable smart refrigeration systems including retail.
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公开(公告)号：US11686602B2
公开(公告)日：2023-06-27
申请号：US17196939
申请日：2021-03-09
Applicant: NEC Laboratories America, Inc.
Inventor： Ming-Fang Huang , Ting Wang , Tiejun Xia , Glenn Wellbrock , Yoshiaki Aono
CPC classification number: G01D5/35338 , G01H9/004 , G01K11/32 , H04B10/25
Abstract: A method of providing a hybrid distributed fiber optic sensing system (DFOS) that extends an existing fiber optic telecommunications network thereby providing that existing fiber optic telecommunications network with DFOS capabilities. The method provides a length of fiber optic cable, wherein said fiber optic cable conveys communications traffic; provides a DFOS interrogator system in optical communication with the communications fiber optic cable; extends the length of communications fiber optic cable with first and second lengths of fiber optic sensory cable, and operates the DFOS interrogator system such that first sensory data is generated in the first length of fiber optic sensory cable and second sensory data is generated in the second length of fiber optic sensory cable and conveyed to the DFOS interrogator system via the communications fiber optic cable, wherein the first type of sensory data and the second type of sensory data is a type selected from the group consisting of acoustic data, temperature data, and vibration data and the first type of sensory data is not the same type as the second type of sensory data.
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公开(公告)号：US11677470B2
公开(公告)日：2023-06-13
申请号：US17580572
申请日：2022-01-20
Applicant: NEC Laboratories America, Inc.
IPC: H04B10/272
CPC classification number: H04B10/272
Abstract: Aspects of the present disclosure describe a method of placement of sensors for DFOS systems, methods, and structures that advantageously employ concurrent sensing. In sharp contrast to the prior art, our inventive method—a heuristic method based on the Explore-and-Pick (EnP) algorithm, which we call a modified EnP (mEnP) method—includes two procedures. The first procedure of our mEnP method explores all possible sensing fiber routes (both linear and star-like routes) for each node in the given network. The second procedure applies a modified greedy algorithm for minimum set cover to select the minimum set of DFOS assignment to fully cover all the links in the given network.
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