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    Data routing in hybrid wireless communication networks
    31.
    发明授权
    Data routing in hybrid wireless communication networks 有权
    混合无线通信网络中的数据路由

    公开(公告)号：US09344950B2

    公开(公告)日：2016-05-17

    申请号：US14589643

    申请日：2015-01-05

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

    Inventor： Lusheng Ji ,  Chonggang Wang ,  Ting Wang

    IPC: H04W40/12 ,  H04L12/801 ,  H04L12/823 ,  H04L12/54 ,  H04W84/18

    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.

    Abstract translation: 数据在可以通过多种技术无线通信的设备的网状网络中路由。 一个或多个这样的设备从旨在接收数据的目的地设备接收广播消息，并且基于广播消息生成第一无线电链路质量度量（RLQM）值。 源设备产生并传递具有嵌入的第一RLQM值的数据量。 如果满足转发标准，则一组中间设备中继数据量; 所述转发标准部分地基于所述第一RLQM值和由所述中间设备集合中的中间设备基于所述广播消息生成的第二RLQM值。 中间设备利用光接口传输数据量。 目的地设备响应于接收到预期数据广播确认信号。

    HYBRID RAMAN AND BRILLOUIN SCATTERING IN FEW-MODE FIBERS
    32.
    发明申请
    HYBRID RAMAN AND BRILLOUIN SCATTERING IN FEW-MODE FIBERS 有权
    混合拉曼和BRILLOUIN散射在FEW模式纤维

    公开(公告)号：US20160109222A1

    公开(公告)日：2016-04-21

    申请号：US14842503

    申请日：2015-09-01

    Applicant: NEC Laboratories America, Inc.

    Inventor： Ting Wang ,  Yi Weng

    IPC: G01B11/16 ,  G01L1/24

    CPC classification number: G01B11/168 ,  G01L1/242 ,  G01L1/246

    Abstract: Methods and systems of sensing conditions in a fiber includes launching a light beam into a fiber. A first branch of scattered light is set to a mode other than a fundamental mode. A second branch of scattered light is optically filtered to remove unscattered input light. Brillouin scattered light is coherently detected on the first branch to produce a combined temperature/strain profile of the fiber. Raman scattered light on the second branch is directly detected to produce a temperature profile of the fiber. A strain profile of the fiber is determined, using a processor, based on the combined temperature/strain profile and the temperature profile.

    Abstract translation: 在光纤中感测条件的方法和系统包括将光束发射到光纤中。 散射光的第一分支被设定为基本模式以外的模式。 将第二个散射光分支进行光学滤波以去除未散射的输入光。 在第一分支上相干地检测布里渊散射光，以产生光纤的组合温度/应变分布。 直接检测第二分支上的拉曼散射光，以产生纤维的温度分布。 使用处理器，基于组合的温度/应变曲线和温度分布来确定纤维的应变分布。

    Adaptive LDPC-coded multidimensional spatial-MIMO multiband generalized OFDM
    33.
    发明授权
    Adaptive LDPC-coded multidimensional spatial-MIMO multiband generalized OFDM 有权
    自适应LDPC编码多维空间MIMO多频段广义OFDM

    公开(公告)号：US09197249B2

    公开(公告)日：2015-11-24

    申请号：US13911326

    申请日：2013-06-06

    Applicant: NEC Laboratories America, Inc.

    Inventor： Ivan B. Djordjevic ,  Ting Wang

    IPC: H03M13/11 ,  H03M13/27 ,  H03M13/31 ,  H03M13/35

    CPC classification number: H03M13/1148 ,  H03M13/1102 ,  H03M13/2707 ,  H03M13/31 ,  H03M13/353

    Abstract: Systems and methods of transmitting includes one or more low-density parity-check (LDPC) encoders configured to adaptively encode one or more streams of input data by adjusting error correction strength based upon channel conditions. One or more mappers are configured to map one or more encoded data streams to symbols by associating bits of the symbols to points of an optimum signal constellation design (OSCD) based on one or more encoded data streams, the OSCD being decomposed into two or more sub-constellations. A spectral multiplexer is configured to combine symbol streams for the one or more encoded data streams to provide a plurality of spectral band groups. A mode multiplexer is configured to combine spectral contents of the plurality of spectral band groups allocated to a plurality of spatial modes for transmission over a transmission medium.

    Abstract translation: 发送系统和方法包括一个或多个低密度奇偶校验（LDPC）编码器，其被配置为通过基于信道条件调整误差校正强度来自适应地编码一个或多个输入数据流。 一个或多个映射器被配置为通过将符号的位与基于一个或多个编码数据流的最佳信号星座图设计（OSCD）的点相关联来将一个或多个编码数据流映射到符号，OSCD被分解为两个或更多个 分星座。 频谱复用器被配置为组合用于一个或多个编码数据流的符号流以提供多个频谱带组。 模式多路复用器被配置为组合分配给多个空间模式的多个频谱带组的频谱内容以便在传输介质上传输。

    Adaptive optical amplifier for WDM systems
    38.
    发明授权
    Adaptive optical amplifier for WDM systems 有权
    用于WDM系统的自适应光放大器

    公开(公告)号：US09094148B2

    公开(公告)日：2015-07-28

    申请号：US14271539

    申请日：2014-05-07

    Applicant: NEC Laboratories America, Inc.

    Inventor： Philip Nan Ji ,  Junqiang Hu ,  Ting Wang

    IPC: H04J14/02 ,  H04B10/079 ,  H04B10/296

    CPC classification number: H04J14/0221 ,  H04B10/07953 ,  H04B10/07955 ,  H04B10/0797 ,  H04B10/296

    Abstract: An optical amplifier that uses software-defined optical networking (SDON) technology, with a centralized controller and flexible physical hardware (the adaptive amplifier here) to optimize the power distribution among different WDM channels in the amplifier. It considers the detailed information for each channel through the information from centralized controller. It is suitable for both single line rate and mixed line rate system, and is suitable for a wavelength division multiplexing WDM system with the same signal type or different signal types.

    Abstract translation: 一种使用软件定义光网络（SDON）技术的光放大器，具有集中控制器和灵活的物理硬件（这里的自适应放大器），以优化放大器中不同WDM通道之间的功率分配。 它通过集中控制器的信息来考虑每个通道的详细信息。 适用于单线速率和混合线速系统，适用于具有相同信号类型或不同信号类型的波分复用WDM系统。

    Full-range pilot-assisted frequency offset estimation for OFDM communication systems
    39.
    发明授权
    Full-range pilot-assisted frequency offset estimation for OFDM communication systems 有权
    用于OFDM通信系统的全范围导频辅助频偏估计

    公开(公告)号：US09036723B2

    公开(公告)日：2015-05-19

    申请号：US14032449

    申请日：2013-09-20

    Applicant: NEC Laboratories America, Inc.

    Inventor： Shaoliang Zhang ,  Ting Wang

    IPC: H04L7/04 ,  H04L27/26

    CPC classification number: H04L7/042 ,  H04L27/2601 ,  H04L27/2613 ,  H04L27/2657 ,  H04L27/2663 ,  H04L27/2671 ,  H04L27/2672 ,  H04L27/2675

    Abstract: A training symbol with two identical halves as well as a pilot-tone at a center frequency is used for both timing synchronization and carrier frequency offset estimation. A timing synchronization is achieved by finding a peak of a cross-correlation function of the two halves in the first symbol. A fraction part of the frequency offset FO is then calculated from a phase difference between the two halves of the first training symbol. Then, the received signal is compensated for the fraction part of FO, and, an integer part of the FO is obtained by counting the shifted positions of the pilot-tone peak in the frequency domain.

    Abstract translation: 具有两个相同的一半的训练符号以及中心频率的导频被用于定时同步和载波频率偏移估计。 通过找到第一符号中两个半部的互相关函数的峰值来实现定时同步。 然后根据第一训练符号的两半之间的相位差来计算频率偏移FO的分数部分。 然后，对FO的分数部分补偿接收到的信号，并且通过对频域中的导频音峰的偏移位置进行计数来获得FO的整数部分。

    Next generation optical access network with centralized digital OLT
    40.
    发明授权
    Next generation optical access network with centralized digital OLT 有权
    具有集中式数字OLT的下一代光接入网

    公开(公告)号：US09014568B2

    公开(公告)日：2015-04-21

    申请号：US13768487

    申请日：2013-02-15

    Applicant: NEC Laboratories America, Inc.

    Inventor： Dayou Qian ,  Ting Wang

    IPC: H04B10/00 ,  H04B10/04 ,  H04B10/06 ,  H04B10/27 ,  H04B10/61 ,  H04B10/50 ,  H04B10/40 ,  H04B10/272 ,  H04B10/516 ,  H04B10/2507 ,  H04B10/2513

    CPC classification number: H04B10/27 ,  H04B10/2507 ,  H04B10/25137 ,  H04B10/272 ,  H04B10/40 ,  H04B10/50 ,  H04B10/516 ,  H04B10/61 ,  H04B10/613 ,  H04B10/616

    Abstract: An optical access network with centralized digital optical line termination OLT including an optical line termination unit having a digital transmitter and a coherent receiver for downstream signal transmitting and upstream signal receiving, and at least one optical network unit ONU with transceiver functions for communicating with the OLT over an optical path, the ONU including intensity modulation and single photodiode detection, wherein the digital transmitter includes digital signal processing DSP, digital-to-analog conversion DAC and analog-to-digital conversion ADC functions that can be shared by all multiple ones of the ONU in the network, the DSP reducing or removing dispersion and non-linearity effects in the network and the coherent receiver enabling performance of the downstream stream signal transmitting to match that of the upstream signal receiving in the OLT.

    Abstract translation: 具有集中数字光线路终端OLT的光接入网络，包括具有数字发射机的光线路终端单元和用于下行信号发射和上行信号接收的相干接收机，以及具有用于与OLT通信的收发机功能的至少一个光网络单元ONU 通过光路，ONU包括强度调制和单光电二极管检测，其中数字发射器包括数字信号处理DSP，数/模转换DAC和模数转换ADC功能，可由所有多个 在网络中的ONU，DSP减少或去除网络中的色散和非线性效应以及相干接收机，使下游流信号发送的性能能够匹配在OLT中接收的上行信号。

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