公开(公告)号：US20170211970A1

公开(公告)日：2017-07-27

申请号：US15385972

申请日：2016-12-21

Applicant: NEC Laboratories America, Inc.

Inventor： Giovanni Milione ,  Philip Nan Ji ,  Ezra Ip ,  Ting Wang

IPC: G01H9/00

CPC classification number: G01H9/004

Abstract: A system to perform distributed acoustic sensing (DAS) in an environment with acoustic vibrations present includes at least an optical fiber positioned in said environment, wherein the optical fiber comprises N spatial channels and N laser pulses are launched into the N spatial channels of the optical fiber and propagate over a fiber length; and one or more sensors to measure N signals of acoustic vibration amplitude and frequency from each of N spatial channels, wherein the N signals are digitally added for spatial averaging and applied to determine DAS.

公开(公告)号：US20170201462A1

公开(公告)日：2017-07-13

申请号：US15470178

申请日：2017-03-27

Applicant: AT&T Intellectual Property I, L.P. ,  NEC Laboratories America, Inc.

Inventor： Lusheng Ji ,  Chonggang Wang ,  Ting Wang

IPC: H04L12/823 ,  H04L12/801 ,  H04L12/26 ,  H04L12/851

CPC classification number: H04L47/32 ,  H04L12/56 ,  H04L43/08 ,  H04L47/11 ,  H04L47/24 ,  H04L47/35 ,  H04W40/12 ,  H04W84/18 ,  Y02D70/00 ,  Y02D70/22 ,  Y02D70/34

Abstract: Data is routed in a mesh network of devices that can communicate wirelessly through a plurality of technologies. One or more of such devices receive broadcast message(s) from a destination device intended to receive the data, and generate a first radio link quality metric (RLQM) value based on the broadcast message(s). A source device originates and delivers a quantum of data with an embedded first RLQM value. A set of intermediate devices relays the quantum of data if a forwarding criterion is fulfilled; the forwarding criterion is based in part on the first RLQM value and a second RLQM value generated by an intermediate device in the set of intermediate devices based on the broadcast message(s). The intermediate device exploits an optical interface to transmit the quantum of data. The destination device broadcasts an acknowledgement signal in response to receiving intended data.

公开(公告)号：US09599556B2

公开(公告)日：2017-03-21

申请号：US15089987

申请日：2016-04-04

Applicant: NEC Laboratories America, Inc.

Inventor： Junqiang Hu ,  Ting Wang

IPC: G01N21/00 ,  G01N21/39

CPC classification number: G01N21/39 ,  G01J3/28 ,  G01J3/4338 ,  G01J2001/4242 ,  G01N2201/06113 ,  G01N2201/12

Abstract: A gas sensing system includes a signal generator including a wavelength tunable laser, the signal generator providing a first periodic signal and a second periodic signal, wherein the first periodic signal comprises a wavelength scanning signal and the second periodic signal comprises a modulation signal; an optical signal absorption path which is wavelength selective, wherein the generated signal covers at least one of the absorbance band; a signal detector that uses lock-in detection to detect a second harmonic of the second periodic signal after absorption, the signal detector further including a local reference generator, a multiplier, and a low pass filter; a local reference includes a first path (ref1) that outputs sinusoidal signal with frequency equals to that of the second signal in signal generator, and a second path (ref2) that outputs sinusoidal signal of two times ref1 frequency; and a local reference generator having a first phase shifter that is configurable from 0 to 2π and a second phase shifter that shifts 90-degree, wherein the first phase shifter is for an alignment of ref1 with the modulation signal and the second phase shifter provides 90-degree shifts for ref2 from ref1, wherein the first and second paths (ref1 and ref2) are selected by a switch, wherein the switch uses the first path during initialization and the second path for normal operation.

公开(公告)号：US09479285B2

公开(公告)日：2016-10-25

申请号：US14513671

申请日：2014-10-14

Applicant: NEC Laboratories America, Inc.

Inventor： Ivan B. Djordjevic ,  Ting Wang

IPC: H03M13/00 ,  H03M13/05 ,  H04J14/04 ,  H04L1/00 ,  H04L27/26 ,  H04L25/02 ,  H04B7/10 ,  H04L5/00

CPC classification number: H04J14/04 ,  H04B7/10 ,  H04L1/0041 ,  H04L1/0057 ,  H04L1/0058 ,  H04L5/0026 ,  H04L25/022 ,  H04L25/0224 ,  H04L25/0256 ,  H04L27/2627 ,  H04L27/2634 ,  H04L27/2649

Abstract: Systems and methods for encoding streams of input data using at least two nonbinary low density parity check (NB-LDPC) encoders; generating NB-LDPC coded optimum signal constellations; performing orthogonal frequency division multiplexing (OFDM) on the NB-LDPC coded four-dimensional (4-D) optimum signal constellations; generating signals using mappers, the mappers configured to assign bits of signals to the signal constellations and to associate the bits of the one or more signals with signal constellation points. Output of the 4-D mappers is modulated using a 4-D OFDM transmitter and a 4-D modulator onto a transmission medium using block coded-modulation, and the modulated output is transmitted by mode-multiplexing independent 4-D OFDM data streams onto fiber. The transmitted modulated output is received, mode-demultiplexed, and demodulated using polarization diversity receivers, one per spatial mode, channel estimation and compensation methods are performed to overcome impairments in the transmission medium; and received data is decoded using non-binary decoders.

Abstract translation: 使用至少两个非二进制低密度奇偶校验（NB-LDPC）编码器对输入数据流进行编码的系统和方法; 生成NB-LDPC编码的最佳信号星座; 对NB-LDPC编码的四维（4-D）最佳信号星座进行正交频分复用（OFDM）; 使用映射器产生信号，映射器被配置为将信号位分配给信号星座并将一个或多个信号的位与信号星座点相关联。 使用块编码调制，使用4-D OFDM发送器和4-D调制器将4-D映射器的输出调制到传输介质上，并且经调制的输出通过将独立的4-D OFDM数据流模式复用传输到 纤维。 传输的调制输出被接收，模式解复用和使用极化分集接收机解调，每个空间模式一个，信道估计和补偿方法被执行以克服传输介质中的损伤; 并且使用非二进制解码器对接收的数据进行解码。

公开(公告)号：US20160301495A1

公开(公告)日：2016-10-13

申请号：US15089699

申请日：2016-04-04

Applicant: NEC Laboratories America, Inc.

Inventor： Philip Nan Ji ,  Ting Wang ,  Yoshiaki Aono

IPC: H04J14/02

CPC classification number: H04J14/021 ,  H04J14/0204 ,  H04J14/0205 ,  H04J14/0217

Abstract: A reconfigurable optical add/drop multiplexer (ROADM) system includes a transponder aggregator section with one or more transponder aggregators; N input ports and N output ports, each coupled to the transponder aggregators and to a cross-connect module having a variable optical splitter or variable optical coupler (VOS/VOC); and a controller to set the VOS/VOC into one of a Multicast & Select configuration and a Route & Combine configuration.

Abstract translation: 可重新配置的光分插复用器（ROADM）系统包括具有一个或多个转发器聚合器的转发器聚合器部分; N个输入端口和N个输出端口，每个输出端口耦合到应答器聚合器和具有可变分光器或可变光耦合器（VOS / VOC）的交叉连接模块; 以及将VOS / VOC设置为组播＆选择配置和路由和组合配置之一的控制器。

公开(公告)号：US20160301467A1

公开(公告)日：2016-10-13

申请号：US15090642

申请日：2016-04-05

Applicant: NEC Laboratories America, Inc.

Inventor： Philip Nan Ji ,  Ting Wang ,  Ryuji Aida

IPC: H04B10/032 ,  H04B10/25 ,  H04Q11/00 ,  H04J14/02

CPC classification number: H04B10/032 ,  H04B10/2503 ,  H04J14/0204 ,  H04J14/0205 ,  H04J14/0212 ,  H04J14/0216 ,  H04J14/0297 ,  H04Q11/0005 ,  H04Q2011/0043

Abstract: A communication system includes a primary module with: first trunk and branch input and output ports, each coupled to first in/out couplers, the first in/out couplers coupled to first circulators, and the circulators in turn coupled to first central couplers; second trunk branch input and output ports, each coupled to second in/out couplers, each of second in/out couplers coupled to second circulators; and first and second bidirectional wavelength-selective switches (WSSes) coupled to the first central couplers. The system also includes a secondary module with first trunk and branch input and output ports, each coupled to first in/out couplers, the first in/out couplers coupled to third circulators, and the circulators in turn coupled to second central couplers; second trunk branch input and output ports, each coupled to second in/out couplers, each of second in/out couplers coupled to fourth circulators, and third and fourth bidirectional wavelength-selective switches (WSSes) coupled to the second central couplers. The system further includes one or more 2×2 switches coupling the primary module WSS outputs with the secondary module WSS outputs.

Abstract translation: 通信系统包括主模块，其具有：第一中继线和分支输入和输出端口，每个耦合到第一进/出耦合器，耦合到第一循环器的第一输入/输出耦合器，并且循环器又耦合到第一中心耦合器; 第二中继线分支输入和输出端口，每个耦合到第二输入/输出耦合器，每个第二输入/输出耦合器耦合到第二循环器; 以及耦合到第一中心耦合器的第一和第二双向波长选择开关（WSS）。 该系统还包括具有第一干线和分支输入和输出端口的二次模块，每个耦合到第一进/出耦合器，耦合到第三循环器的第一输入/输出耦合器，并且循环器又耦合到第二中心耦合器; 第二中继分支输入和输出端口，每个耦合到第二输入/输出耦合器，耦合到第四循环器的每个第二输入/输出耦合器，以及耦合到第二中心耦合器的第三和第四双向波长选择开关（WSS）。 该系统还包括一个或多个将主模块WSS输出与次模块WSS输出耦合的2×2开关。

公开(公告)号：US09420359B2

公开(公告)日：2016-08-16

申请号：US14184787

申请日：2014-02-20

Applicant: NEC Laboratories America, Inc.

Inventor： Neda Cvijetic ,  Philip Nan Ji ,  Ting Wang ,  Akihiro Tanaka

IPC: H04Q11/00 ,  H04J14/02

CPC classification number: H04Q11/0067 ,  H04J14/0224 ,  H04J14/0267 ,  H04Q2011/0086

Abstract: A network apparatus used in an optical network is disclosed. The network apparatus includes one or more first tunable and temperature controlled (TTC) lasers, one or more transmitters each of which is connected to one of said one or more TTC lasers, one or more second TTC lasers, one or more digital signal processing (DSP) transponders (TPNDs) each of which is connected to one of said one or more second TTC lasers, one or more receivers, and a controller to control said one or more transmitters and said one or more DSP TPNDs, wherein said one or more transmitters defragment an optical access spectrum, and said one or more DSP TPNDs exploit a newly available spectrum. Other apparatuses, systems, and methods also are disclosed.

Abstract translation: 公开了一种在光网络中使用的网络设备。 网络设备包括一个或多个第一可调谐和温度控制（TTC）激光器，一个或多个发射器，每个发射器连接到所述一个或多个TTC激光器之一，一个或多个第二TTC激光器，一个或多个数字信号处理 DSP）转发器（TPND），每个转发器（TPND）连接到所述一个或多个第二TTC激光器之一，一个或多个接收器，以及控制器，用于控制所述一个或多个发射机和所述一个或多个DSP TPND，其中所述一个或多个 发射机对光接入频谱进行碎片整理，并且所述一个或多个DSP TPND利用新可用频谱。 还公开了其他装置，系统和方法。

公开(公告)号：US20160198954A1

公开(公告)日：2016-07-14

申请号：US14979034

申请日：2015-12-22

Applicant: NEC Laboratories America, Inc.

Inventor： Ting Wang ,  Yi Weng

IPC: A61B5/00

CPC classification number: A61B5/0095 ,  A61B5/7285 ,  A61B2576/00

Abstract: A method and system for remote sensing. The method includes applying an orbital angular momentum (OAM) mode on a light beam to generate an OAM light beam having an optical OAM spectrum, exposing a target object to the OAM light beam such that the target object absorbs energy of the OAM light beam to generate ultrasonic emissions, the ultrasonic emissions having a reflected OAM spectrum associated with the target object, and generating a high resolution image of the target object based on the reflected OAM spectrum.

Abstract translation: 一种用于遥感的方法和系统。 该方法包括在光束上应用轨道角动量（OAM）模式以产生具有光学OAM光谱的OAM光束，将目标物体暴露于OAM光束，使得目标物体将OAM光束的能量吸收到 产生超声波发射，超声发射具有与目标物体相关联的反射OAM光谱，并且基于反射的OAM光谱产生目标物体的高分辨率图像。

公开(公告)号：US20160191168A1

公开(公告)日：2016-06-30

申请号：US14934078

申请日：2015-11-05

Applicant: NEC Laboratories America, Inc.

Inventor： Yue-Kai Huang ,  Shaoliang Zhang ,  Fatih Yaman ,  Ting Wang

IPC: H04B10/532 ,  H04B10/2575 ,  H04Q11/00

CPC classification number: H04Q11/0001 ,  H04B10/516 ,  H04B10/613 ,  H04B10/616 ,  H04B10/6166 ,  H04J14/0298

Abstract: Systems and methods are disclosed for data communication by performing RF sub-band multiplexing and demultiplexing by cascading a radio-frequency (RF) mixing module and optical dual-polarized (DP) QPSK modulator forhybrid RF/optical IQ modulation; and performing intra-transceiver optical superchannel switching through the RF sub-band multiplexing.

Abstract translation: 公开了通过级联射频（RF）混合模块和用于混合RF /光学IQ调制的光学双极化（DP）QPSK调制器进行RF子带复用和解复用的数据通信系统和方法; 以及通过RF子带复用执行收发器内的光学超频道切换。

公开(公告)号：US09369409B2

公开(公告)日：2016-06-14

申请号：US14307573

申请日：2014-06-18

Applicant: NEC Laboratories America, Inc.

Inventor： Junqiang Hu ,  Yoshinobu Ooto ,  Kazuo Takagi ,  Yoshiaki Aono ,  Ting Wang

IPC: H04L12/939 ,  H04L12/721 ,  H04L12/735 ,  H04L12/703 ,  H04L12/723 ,  H04L12/801

CPC classification number: H04L49/557 ,  H04L45/1283 ,  H04L45/28 ,  H04L45/50 ,  H04L45/68 ,  H04L45/70 ,  H04L47/34

Abstract: A method and system are described for providing hitless protection in a packet switched network having source nodes and destination nodes. The method includes enabling a working path and a protecting path between the source and destination nodes. The working path is non-overlapping with respect to the protecting path. The method further includes replicating traffic in a given one of the source nodes to generate replicated traffic. The method also includes forwarding the traffic and the replicated traffic through a working path and a protecting path, respectively, from the given one of the source nodes to a particular one of the destination nodes. The method additionally includes delivering a hitless-protected service in the particular one of the destination nodes by selecting traffic packets received from either the working path or the protecting path.

Abstract translation: 描述了一种用于在具有源节点和目的地节点的分组交换网络中提供无中断保护的方法和系统。 该方法包括启用源节点和目的节点之间的工作路径和保护路径。 工作路径与保护路径不重叠。 该方法还包括在给定的一个源节点中复制业务以生成复制业务。 该方法还包括将业务和复制的业务分别通过工作路径和保护路径转发到从给定的一个源节点到目标节点的特定一个。 该方法还包括通过选择从工作路径或保护路径接收到的业务分组来递送目标节点中的特定一个节点中的无受保护的服务。