公开(公告)号：US09203519B2

公开(公告)日：2015-12-01

申请号：US14044298

申请日：2013-10-02

Applicant: NEC Laboratories America, Inc.

Inventor： Fatih Yaman ,  Shaoliang Zhang ,  Ting Wang ,  Yoshihisa Inada ,  Takaaki Ogata ,  Yasuhiro Aoki

IPC: H04L27/20 ,  H04B10/516

CPC classification number: H04B10/5161 ,  H04B10/516

Abstract: The invention is directed to a novel computer implemented method for finding a modulation format that has better receiver sensitivity than modulation formats that are currently being used, with a correlated symbol modulation in which neighboring symbols are coded and decoded together to increase receiver sensitivity.

Abstract translation: 本发明涉及一种用于找到具有比目前使用的调制格式更好的接收机灵敏度的调制格式的新型计算机实现方法，其中相邻符号调制将相邻符号编码并一起解码以增加接收机灵敏度。

公开(公告)号：US09184873B2

公开(公告)日：2015-11-10

申请号：US14218116

申请日：2014-03-18

Applicant: NEC Laboratories America, Inc.

Inventor： Ivan B Djordjevic ,  Ting Wang

IPC: H04J14/02 ,  H04L1/00 ,  H04J14/06 ,  H04B10/2581 ,  H04B10/516 ,  H04B10/61 ,  H04J14/04

CPC classification number: H04L1/0043 ,  H04B10/2581 ,  H04B10/516 ,  H04B10/5161 ,  H04B10/61 ,  H04B10/616 ,  H04J14/04 ,  H04J14/06 ,  H04J2203/0089 ,  H04J2211/00 ,  H04L1/0002 ,  H04L1/0041 ,  H04L1/005 ,  H04L1/0058 ,  H04L1/0061

Abstract: Systems and methods for transmitting data, including encoding one or more streams of input data using one or more adaptive Low Density Parity Check (LDPC) encoders, wherein the encoders generate one or more signal constellations; modulate one or more signals using hybrid multidimensional coded modulation; apply orthogonal prolate spheroidal wave functions as electrical basis functions; generate one or more spectral band group signals by selecting and combining two or more spectral band groups with center frequencies that are orthogonal to each other; and spectral-mode-multiplex and transmit the one or more adaptive LDPC-coded data streams including the one or more spectral band group signals combined into corresponding spatial modes over a transmission medium.

Abstract translation: 用于发送数据的系统和方法，包括使用一个或多个自适应低密度奇偶校验（LDPC）编码器编码一个或多个输入数据流，其中所述编码器生成一个或多个信号星座; 使用混合多维编码调制来调制一个或多个信号; 应用正交长椭球波函数作为电气基函数; 通过选择并组合两个或更多个具有彼此正交的中心频率的频谱带组来产生一个或多个频谱组信号; 并且通过传输介质将包括一个或多个频谱组合信号的一个或多个自适应LDPC编码数据流发送到相应的空间模式中进行频谱模式复用。

公开(公告)号：US20150319047A1

公开(公告)日：2015-11-05

申请号：US14699228

申请日：2015-04-29

Applicant: NEC Laboratories America, Inc.

Inventor： Ankitkumar Patel ,  Philip Nan Ji ,  Ting Wang

IPC: H04L12/24 ,  H04J14/02

CPC classification number: H04L41/12 ,  H04J14/0227 ,  H04J14/0257 ,  H04J14/0271 ,  H04L41/22

Abstract: Methods and systems for embedding VI demands in a software-defined network include mapping virtual nodes over physical nodes in a network topology. An auxiliary graph including virtual links between physical nodes that have a residual capacity sufficient to meet a virtual infrastructure demand is constructed. Virtual links over physical links are mapped to maximize use of existing optical channels and to minimize switching of a virtual link between a wavelength division multiplexing layer and an IP layer. New optical channels with a maximum spectral efficiency are established. A set of potential solutions for embedding a set of virtual infrastructure demands is determined. A solution is selected from the set of potential solutions that maximizes a weighted average of spectrum needed to support the set of virtual infrastructure demands and a cost of provisioning the virtual infrastructure demands.

Abstract translation: 用于将VI需求嵌入软件定义网络的方法和系统包括在网络拓扑中的物理节点上映射虚拟节点。 包括具有足以满足虚拟基础设施需求的剩余容量的物理节点之间的虚拟链路的辅助图形被构建。 通过物理链路的虚拟链路被映射以最大限度地利用现有的光通道并且最小化波分复用层和IP层之间的虚拟链路的切换。 建立了具有最大频谱效率的新型光通道。 确定一组用于嵌入一组虚拟基础设施需求的潜在解决方案。 从一组潜在解决方案中选择一种解决方案，最大限度地提高支持一组虚拟基础设施需求所需的频谱加权平均值，以及提供虚拟基础架构需求的成本。

公开(公告)号：US09124369B2

公开(公告)日：2015-09-01

申请号：US14155518

申请日：2014-01-15

Applicant: NEC Laboratories America, Inc.

Inventor： Philip Nan Ji ,  Ting Wang ,  Yoshiaki Aono

IPC: H04B10/40 ,  H04B10/50 ,  H04J14/02 ,  H04Q11/00

CPC classification number: H04B10/40 ,  H04B10/506 ,  H04J14/0298 ,  H04Q11/0005 ,  H04Q2011/0016

Abstract: An optical transceiver including a multi-direction variable transmitter including multiple outputs with different subcarriers being directed to different ones of the outputs to go to different directions in a network, and a multi-direction variable receiver for receiving multiple inputs thereby enabling transmission direction in a network with the transceiver at subcarrier granularity and avoiding entire super-channel granularity and enabling unused subcarriers to be utilized for traffic in other directions or destinations and making switching granularity finer for flexibility in the network.

Abstract translation: 一种包括具有不同子载波的多个输出的多方向可变发射机的光收发器被引导到不同的输出端以进入网络中的不同方向;以及多方向可变接收机，用于接收多个输入，从而使能在 网络与收发器在子载波粒度和避免整个超频道粒度，并使未使用的子载波可用于其他方向或目的地的业务，并使交换粒度更好的网络灵活性。

公开(公告)号：US09094125B2

公开(公告)日：2015-07-28

申请号：US13901766

申请日：2013-05-24

Applicant: NEC Laboratories America, Inc.

Inventor： Ivan B. Djordjevic ,  Lei Xu ,  Ting Wang

IPC: H04B10/12 ,  H04B10/04 ,  H04B10/06 ,  H04B10/2581 ,  H04B10/516 ,  H04L1/00

CPC classification number: H04B10/2581 ,  H04B10/516 ,  H04L1/0041 ,  H04L5/0008 ,  H04L5/0023 ,  H04L27/3405 ,  H04L27/3422

Abstract: Systems and methods for data transport are provided which encode streams of data using low density parity check (LDPC) encoders and map data streams to symbols, by assigning bits of symbols to a signal constellation and associating bits with constellation points. Constellation points are generated using a D-dimensional optimum signal constellation design (OSCD) method. The OSCD determines an optimum source distribution for an optical channel, generates D-dimensional training sequences from the optimum source distribution, determines new signal constellation points as the center of mass for each D-dimensional cluster of points, and repeats these steps until convergence or until a predetermined number of iterations is reached. Coordinates obtained by the D-dimensional OSCD method are stored in a look-up-table (LUT), points are selected from the LUT using encoded data streams, coordinates are input into a D-dimensional modulator after digital-to-analog conversion (DAC), and a modulated signal is transmitted over an optical medium.

Abstract translation: 提供了用于数据传输的系统和方法，其通过使用低密度奇偶校验（LDPC）编码器将数据流编码并将数据流映射到符号，通过将符号的位分配给信号星座并将比特与星座点相关联。 使用D维最佳信号星座设计（OSCD）方法生成星座点。 OSCD确定光通道的最佳光源分布，从最佳光源分布生成D维训练序列，将新的信号星座点确定为每个D维聚类点的质心，并重复这些步骤直到收敛或 直到达到预定次数的迭代。 通过D维OSCD方法获得的坐标被存储在查找表（LUT）中，使用编码数据流从LUT中选择点，在数模转换之后将坐标输入到D维调制器（ DAC），并且调制信号通过光学介质传输。

公开(公告)号：US09036992B2

公开(公告)日：2015-05-19

申请号：US13903508

申请日：2013-05-28

Applicant: NEC Laboratories America, Inc.

Inventor： Ivan B. Djordjevic ,  Ting Wang

IPC: H04B10/08 ,  H04B17/00 ,  H04J14/02 ,  H04J14/06 ,  H04B10/12 ,  H04B10/04 ,  H04B10/2507 ,  H04B10/61

CPC classification number: H04B10/2507 ,  H04B10/616 ,  H04B10/6165

Abstract: Methods and systems for decoding a signal include compensating for impairments in a received signal using at least carrier phase estimation, where residual phase error remains after compensation; calculating symbol log-likelihood ratios (LLRs) for symbols in the compensated signal using Monte Carlo integration; demapping the symbols in the compensated signal using the symbol LLRs and extrinsic information from signal decoding to produce one or more estimated codewords; and decoding each estimated codeword with a decoder that generates a decoded codeword and extrinsic information.

Abstract translation: 用于对信号进行解码的方法和系统包括使用至少载波相位估计补偿接收信号中的损伤，其中在补偿之后残留相位误差; 使用蒙特卡罗积分计算补偿信号中的符号的符号对数似然比（LLR）; 使用来自信号解码的符号LLR和外在信息对补偿信号中的符号进行解映射以产生一个或多个估计码字; 以及用生成解码码字和外在信息的解码器解码每个估计码字。

公开(公告)号：US09002195B2

公开(公告)日：2015-04-07

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: H04B10/00 ,  H04B10/038 ,  H04B10/032

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。

公开(公告)号：US20150055664A1

公开(公告)日：2015-02-26

申请号：US14465122

申请日：2014-08-21

Applicant: NEC Laboratories America, Inc.

Inventor： Konstantinos Kanonakis ,  Junqiang Hu ,  Ankitkumar Patel ,  Philip Ji ,  Ting Wang

IPC: H04B10/27 ,  H04B10/50 ,  H04B10/60 ,  H04B10/40

CPC classification number: H04Q11/00 ,  H04L12/40136 ,  H04Q2213/13103 ,  H04Q2213/13292 ,  H04Q2213/13389 ,  Y02D50/10

Abstract: Systems and methods for data transport, including receiving one or more signals into a reconfigurable and flexible rate shared rate multi-transponder network architecture, wherein the network architecture includes one or more transponders with multiple line side interfaces and one or more client side interfaces. The transponders are configured to map one or more signals to multiple parallel Virtual Ethernet Links, remove idle characters from the one or more signals, buffer one or more blocks of characters using an intermediate block buffer, activate and deactivate one or more portions of input/output electrical lanes of an Ethernet module, multiplex and demultiplex the one or more signals to and from the input/output electrical lanes to enable sharing of a single optical transceiver by multiple independent signals, and insert blocks of idle characters to enable transmission over a lower rate transmission pipe.

Abstract translation: 用于数据传输的系统和方法，包括将一个或多个信号接收到可重配置和灵活的速率共享速率多应答器网络架构中，其中所述网络架构包括具有多个线路侧接口和一个或多个客户机侧接口的一个或多个转发器。 应答器被配置为将一个或多个信号映射到多个并行虚拟以太网链路，从一个或多个信号中去除空闲字符，使用中间块缓冲器缓冲一个或多个字符块，激活和去激活输入/ 以太网模块的输出电气通道，将一个或多个信号复用到多路复用并从输入/输出电路解复用，以使得能够通过多个独立信号共享单个光收发器，并插入空闲字符块以使得能够在较低的 速率传输管。

公开(公告)号：US20150043927A1

公开(公告)日：2015-02-12

申请号：US14457460

申请日：2014-08-12

Applicant: NEC Laboratories America, Inc.

Inventor： Junqiang Hu ,  Ting Wang ,  Lei Xu

IPC: H04B10/61

CPC classification number: H04B10/613 ,  H04B10/612 ,  H04B10/614

Abstract: A method for reducing optical components at a receiver which include converting an input signal at a receiver to include an interleaving of alternate signal diversity components, the signal diversity components including phase diversity when the converting includes 0 and 90 degree interleaving and the signal diversity components include polarization diversity interleaving when the converting includes interleaved orthogonal polarizations, and combining the signal diversity components for enabling a single photo detection at the receiver to detect the alternative signal diversity components for subsequent analog-to-digital conversion.

Abstract translation: 一种用于减少接收机处的光学部件的方法，包括在接收机处转换输入信号以包括交替的信号分集分量的交织，所述信号分集分量包括当转换包括0和90度交织时的相位分集，并且信号分集分量包括 当转换包括交错的正交偏振时，偏振分集交错，以及组合信号分集分量，以使接收机处的单次光检测能够检测用于随后的模数转换的备选信号分集分量。

公开(公告)号：US20140379927A1

公开(公告)日：2014-12-25

申请号：US14312610

申请日：2014-06-23

Applicant: NEC Laboratories America, Inc.

Inventor： Ankitkumar Patel ,  Philip Ji ,  Ting Wang

IPC: H04L12/911

CPC classification number: H04J14/0227 ,  G06F9/46 ,  H04L41/0896 ,  H04L45/12 ,  H04L67/10

Abstract: A method for solving a cloud embedding problem includes first mapping virtual links over physical links followed by virtual nodes over physical nodes. The inventive method entails an efficient procedure, namely network followed by compute load balancing (NCLB), that first maps virtual links over physical links while balancing network resources, and finally, maps virtual nodes over physical nodes while balancing different types of computational resources.

Abstract translation: 解决云嵌入问题的方法包括首先通过物理链路跟踪物理节点之后的虚拟节点映射虚拟链路。 本发明的方法需要有效的过程，即网络，然后是计算负载平衡（NCLB），其首先在物理链路上映射虚拟链路，同时平衡网络资源，最后，通过物理节点映射虚拟节点，同时平衡不同类型的计算资源。