公开(公告)号：US08874987B2

公开(公告)日：2014-10-28

申请号：US13646454

申请日：2012-10-05

Applicant: NEC Laboratories America, Inc.

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

IPC: H03M13/00 ,  H04L1/00 ,  H03M13/11 ,  H03M13/25 ,  H04J14/06 ,  H03M13/39 ,  H03M13/29

CPC classification number: H04L1/0057 ,  H03M13/116 ,  H03M13/255 ,  H03M13/2957 ,  H03M13/3905 ,  H03M13/3972 ,  H03M13/6331 ,  H04J14/06 ,  H04L1/0003

Abstract: Systems and methods for data transport, comprising encoding one or more streams of input data with one or more low density parity check (LDPC) encoders, corresponding to one or more polarization/spatial mode branches. One or more encoded data streams are mapped to symbols, wherein the mapper is configured to assign bits of the symbols to a signal constellation and to associate the bits of the symbols with signal constellation points. A signal constellation is formulated which minimizes a mean-square error of the signal constellation representing the source. The optimum signal constellation size is adjusted to improve transmission quality by adjusting the signal constellation an optical signal to noise ratio (OSNR), wherein the signal constellation is selected using a look-up table (LUT); and the symbols are modulated in accordance with the output of the mapper onto a transmission medium.

Abstract translation: 用于数据传输的系统和方法，包括对应于一个或多个极化/空间模式分支，用一个或多个低密度奇偶校验（LDPC）编码器编码一个或多个输入数据流。 将一个或多个编码数据流映射到符号，其中映射器被配置为将符号的位分配给信号星座并将符号的位与信号星座点相关联。 配置信号星座，其最小化表示源的信号星座的均方误差。 调整最佳信号星座大小以通过调整信号星座图的光信噪比（OSNR）来提高传输质​​量，其中使用查找表（LUT）来选择信号星座; 并且根据映射器的输出将符号调制到传输介质上。

公开(公告)号：US20140301733A1

公开(公告)日：2014-10-09

申请号：US14244253

申请日：2014-04-03

Applicant: NEC Laboratories America, Inc.

Inventor： Junqiang Hu ,  Ting Wang

IPC: H04B10/079 ,  H04J14/08 ,  H04B10/40

CPC classification number: H04B10/0795 ,  H04B10/0793 ,  H04B10/40 ,  H04J14/08 ,  H04Q11/0062 ,  H04Q2011/0086

Abstract: There are provided an optical transponder having a first end and a second end, as well as an electric switch having the transponder. The transponder includes an optical interface, at the first end, having a variable rate optical transmitter and a variable rate optical receiver to respectively transmit and receive signals using at least one of different bandwidths and different bit rates. The transponder further includes an electrical interface, at the second end, having an electrical interface throughput matching an optical capacity of the optical interface. The transponder also includes a processor for controlling the optical capacity.

Abstract translation: 提供了具有第一端和第二端的光学应答器，以及具有应答器的电开关。 应答器包括光接口，其在第一端具有可变速率光发射机和可变速率光接收机，以使用不同带宽和不同比特率中的至少一个分别发射和接收信号。 应答器还包括电接口，在第二端具有与光学接口的光学容量匹配的电接口吞吐量。 应答器还包括用于控制光学容量的处理器。

公开(公告)号：US20140241720A1

公开(公告)日：2014-08-28

申请号：US14188671

申请日：2014-02-24

Applicant: NEC Laboratories America, Inc.

Inventor： Philip Nan Ji ,  Ting Wang ,  Ryuji Aida

IPC: H04Q11/00

CPC classification number: H04Q11/0066 ,  H04Q11/0005 ,  H04Q2011/0032 ,  H04Q2201/804 ,  H04Q2213/013 ,  H04Q2213/13003 ,  H04Q2213/1301

Abstract: A submarine network includes a submarine network with a branching unit BU for splitting or combining a signal between a main trunk path and a branch path for allowing signals from different paths to share a same fiber optic path, said BU and submarine network normally having a fixed and predetermined wavelength arrangement preventing reconfigurability of the submarine network, and a latching wavelength selective switch WSS or wavelength blocker WB in the branching unit for splitting or combining the signals between the main trunk path and branch path to enable a latching capability and enable reconfigurability of the branching unit BU, the latching WSSS being a bistable liquid crystal based material without moving parts for increased stability and lower power consumption over use of conventional mono-stable liquid crystal LC switches in a submarine network.

Abstract translation: 潜艇网络包括具有分支单元BU的海底网络，用于分裂或组合主干道路径和分支路径之间的信号，以允许来自不同路径的信号共享相同的光纤路径，所述BU和海底网络通常具有固定的 以及防止海底网络的可重新配置的预定波长布置，以及分支单元中的锁存波长选择开关WSS或波长阻挡器WB，用于分裂或组合主干道和分支路径之间的信号，以实现锁存能力并使得能够实现 分支单元BU，锁定WSSS是基于双稳态液晶的材料，没有移动部件，用于增加稳定性，并且在潜艇网络中使用常规单稳态液晶LC开关的功耗更低。

公开(公告)号：US20140212135A1

公开(公告)日：2014-07-31

申请号：US14166350

申请日：2014-01-28

Applicant: NEC Laboratories America, Inc.

Inventor： Philip Nan Ji ,  Ting Wang

IPC: H04Q11/00 ,  H04B7/04 ,  H04L27/26

CPC classification number: H04Q11/0066 ,  H04J14/0267 ,  H04L5/0008 ,  H04L5/0023 ,  H04L5/0028 ,  H04L27/2601 ,  H04L27/2697 ,  H04L49/356 ,  H04Q11/0005 ,  H04Q2011/0032 ,  H04Q2213/13291

Abstract: A communication system enabling a switching procedure for a multiple-input multiple-output orthogonal frequency division multiplexing (MIMO OFDM) based flexible rate intra-data center network DCN, includes a MIMO OFDM DCN with optical burst switching OBS capability, an optical burst switching OBS procedure for influencing the MIMO OFDM DCN, and a centralized control configuration coupled to the MIMO OFDM DCN and enabling a software defined network SDN configuration in the communication system.

Abstract translation: 一种能够实现基于多输入多输出正交频分复用（MIMO OFDM）的灵活率数据中心网络DCN的切换过程的通信系统包括具有光突发交换OBS能力的MIMO OFDM DCN，光突发交换OBS 影响MIMO OFDM DCN的过程，以及耦合到MIMO OFDM DCN的集中式控制配置，并且在通信系统中实现软件定义的网络SDN配置。

公开(公告)号：US20140205286A1

公开(公告)日：2014-07-24

申请号：US14155518

申请日：2014-01-15

Applicant: NEC Laboratories America, Inc.

Inventor： Philip Nan Ji ,  Ting Wang ,  Yoshiaki Aono

IPC: 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：US20140101512A1

公开(公告)日：2014-04-10

申请号：US13911326

申请日：2013-06-06

Applicant: NEC Laboratories America, Inc.

Inventor： Ivan B. Djordjevic ,  Ting Wang

IPC: H03M13/11

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。

公开(公告)号：US20140099128A1

公开(公告)日：2014-04-10

申请号：US14044518

申请日：2013-10-02

Applicant: NEC LABORATORIES AMERICA, INC.

Inventor： Eduardo F. Mateo ,  Fatih Yaman ,  Dayou Qian ,  Ting Wang

IPC: H04B10/61

CPC classification number: H04B10/6163

Abstract: An optical communication system includes a digital signal processer coupled to the coherent receiver, said coherent receiver including a nonlinearity compensation module for compensating for nonlinear effects in fiber in the optical link for increasing capacity or transmission distance of the fiber, the nonlinearity compensation module includes a spectral slicing of the signal into bands, computing nonlinear interaction between the bands with parameters opposite to those of the fiber to reverse the non-linear effects in the fiber, and only certain nonlinear interactions between bands are considered thereby reducing complexity of the nonlinearity compensation.

Abstract translation: 光通信系统包括耦合到相干接收机的数字信号处理器，所述相干接收机包括用于补偿光链路中的光纤中的非线性效应的非线性补偿模块，用于增加光纤的容量或传输距离，非线性补偿模块包括 将信号频谱切片成频带，计算具有与光纤相反参数的频带之间的非线性相互作用，以反转光纤中的非线性效应，并且仅考虑频带之间的某些非线性相互作用，从而降低非线性补偿的复杂性。

公开(公告)号：US20140099103A1

公开(公告)日：2014-04-10

申请号：US13903508

申请日：2013-05-28

Applicant: NEC Laboratories America, Inc.

Inventor： Ivan B. Djordjevic ,  Ting Wang

IPC: H04B10/2507

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：US20130343755A1

公开(公告)日：2013-12-26

申请号：US13915874

申请日：2013-06-12

Applicant: NEC Laboratories America, Inc.

Inventor： Neda Cvijetic ,  Maria Ioanna Angelou ,  Ankitkumar Patel ,  Milorad Cvijetic ,  Philip Nan Ji ,  Ting Wang

IPC: H04Q11/00

CPC classification number: H04Q11/0066 ,  H04J14/0227 ,  H04J14/0282

Abstract: A software-defined (SD) optical network is disclosed. An SD optical line terminal (OLT) includes a global SD controller, one or more SD OLT drivers connected to the global SD controller, and an underlying hardware component connected to each of said one or more SD OLT drivers. An SD optical network unit (ONU) includes a local SD controller, one or more SD optical network unit (ONU) drivers connected to the local SD controller, and an underlying hardware component connected to each of said one or more SD ONU drivers, wherein the local SD controller manages said one or more SD ONU drivers by issuing commands communicated to said one or more SD ONU drivers, and wherein each of said one or more SD ONU drivers implements a required function on the underlying hardware component. Other apparatuses, systems, and methods also are disclosed.

Abstract translation: 公开了一种软件定义（SD）光网络。 SD光线路终端（OLT）包括全局SD控制器，连接到全局SD控制器的一个或多个SD OLT驱动器和连接到所述一个或多个SD OLT驱动器中的每一个的底层硬件组件。 SD光网络单元（ONU）包括本地SD控制器，连接到本地SD控制器的一个或多个SD光网络单元（ONU）驱动器和连接到所述一个或多个SD ONU驱动器中的每一个的底层硬件组件，其中 本地SD控制器通过发出传送给所述一个或多个SD ONU驱动器的命令来管理所述一个或多个SD ONU驱动器，并且其中所述一个或多个SD ONU驱动器中的每一个在底层硬件组件上实现所需功能。 还公开了其他装置，系统和方法。

公开(公告)号：US20130259474A1

公开(公告)日：2013-10-03

申请号：US13855104

申请日：2013-04-02

Applicant: NEC LABORATORIES AMERICA, INC.

Inventor： Philip N. Ji ,  Yoshiaki Aono ,  Ting Wang

IPC: H04J14/02

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。