公开(公告)号：US09203555B2

公开(公告)日：2015-12-01

申请号：US14179683

申请日：2014-02-13

Applicant: NEC Laboratories America, Inc.

Inventor： Ivan B Djordjevic ,  Ting Wang

IPC: H03M13/11 ,  H04L1/00 ,  H04J14/00 ,  H04L27/26 ,  H04L27/34 ,  H04L27/36

CPC classification number: H04L1/0041 ,  H03M13/116 ,  H03M13/1177 ,  H03M13/255 ,  H03M13/271 ,  H03M13/2957 ,  H03M13/6325 ,  H04B10/2581 ,  H04B10/61 ,  H04J14/002 ,  H04L1/0045 ,  H04L1/0058 ,  H04L25/022 ,  H04L25/0224 ,  H04L25/025 ,  H04L25/0256 ,  H04L27/2626 ,  H04L27/2697 ,  H04L27/3405 ,  H04L27/362

Abstract: A system/method for data transport, including encoding one or more streams of input data using one or more Low Density Parity Check (LDPC) encoders; employing one or more signal constellations obtained using an optimum signal constellation design (OSCD); determining an optimum mapping rule by comparing cost functions of each of a plurality of mapping rules; combining one or more LDPC-coded OSCD signal constellation data streams with coherent optical-orthogonal frequency division multiplexing (CO-OFDM) coded modulation to achieve channel capacity; and mode-multiplexing and transmitting one or more independent LDPC-coded optimum signal constellation design (OSCD) data streams over a transmission medium.

Abstract translation: 一种用于数据传输的系统/方法，包括使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; 采用使用最佳信号星座设计（OSCD）获得的一个或多个信号星座; 通过比较多个映射规则中的每一个的成本函数来确定最佳映射规则; 将一个或多个LDPC编码的OSCD信号星座数据流与相干光正交频分复用（CO-OFDM）编码调制组合以实现信道容量; 以及通过传输介质来模式复用和发送一个或多个独立的LDPC编码的最佳信号星座设计（OSCD）数据流。

公开(公告)号：US20150295756A1

公开(公告)日：2015-10-15

申请号：US14682382

申请日：2015-04-09

Applicant: NEC Laboratories America, Inc.

Inventor： Yawei Yin ,  Philip Ji ,  Konstantinos Kanonakis ,  Ting Wang

IPC: H04L12/24 ,  H04Q11/00

CPC classification number: H04Q11/0071 ,  H04L49/60 ,  H04Q2011/0081 ,  H04Q2011/0086 ,  H04Q2011/009

Abstract: The present invention proposes a hybrid optical/electrical network architecture for the direct-connect datacenters and HPC systems. It utilizes small scale optical switches in parallel with the electrical switching modules (e.g. the multi-port NIC) in the direct-connect electrical network (e.g 3D Torus) in order to provide optical bypassing capabilities. The optical network keeps the same topology as the electrical packet switching network, while the number of optical nodes can be equal or less than the electrical switching modules.

Abstract translation: 本发明提出了用于直连数据中心和HPC系统的混合光/电网络架构。 它利用与直接连接电网（例如3D环）中的电气开关模块（例如多端口NIC））并联的小规模光学开关，以提供光学旁路能力。 光网络保持与电子分组交换网络相同的拓扑结构，而光节点的数量可以等于或小于电气交换模块。

公开(公告)号：US20150292944A1

公开(公告)日：2015-10-15

申请号：US14682363

申请日：2015-04-09

Applicant: NEC Laboratories America, Inc.

Inventor： Yue Tian ,  Ting Wang

IPC: G01J3/02 ,  G01J3/45

CPC classification number: G01J3/0297 ,  G01J3/0205 ,  G01J3/26 ,  G01J3/28 ,  G01J3/45

Abstract: An optical phase scrambler is coupled to a laser source to randomly modulate the optical phase. Since the optical phase is continuously changing in a random fashion, at the output of an etalon interferometer formed in the optical path, the two or more components in the interference always have certain time delay between each other, resulting in a random phase different between each other. Therefore, after interference, the fringe amplitude varies randomly as well. Then at the receiver side, the fringe noise is greatly reduced after averaging over time.

Abstract translation: 光学相位扰频器耦合到激光源以随机调制光学相位。 由于光学相位以随机方式连续变化，在形成于光路中的标准具干涉仪的输出处，干涉中的两个或更多个成分之间总是具有一定的时间延迟，导致每个 其他。 因此，干扰后，条纹幅度也随机变化。 然后在接收机侧，随着时间的推移，边缘噪声大大降低。

公开(公告)号：US09071383B2

公开(公告)日：2015-06-30

申请号：US14172468

申请日：2014-02-04

Applicant: NEC Laboratories America, Inc.

Inventor： Ivan B Djordjevic ,  Ting Wang

IPC: H04B10/04 ,  H04J14/06

CPC classification number: H04J14/06 ,  H03M13/255 ,  H03M13/6325 ,  H03M13/6561 ,  H04B10/2581 ,  H04B10/516 ,  H04L1/005 ,  H04L1/0058

Abstract: A system and method for transmitting data, including one or more Low Density Parity Check (LDPC) encoders configured to encode one or more streams of input data; a signal constellation generation module configured to generate one or more signal constellations; one or more modulators configured to generate one or more signals using hybrid multidimensional coded modulation; a modified orthogonal polynomial generation module configured to generate modified orthogonal polynomials for use as electrical basis functions; and one or more mode-multiplexers and transmitters configured to mode-multiplex and transmit one or more LDPC-coded data streams over a transmission medium.

Abstract translation: 一种用于发送数据的系统和方法，包括配置成编码一个或多个输入数据流的一个或多个低密度奇偶校验（LDPC）编码器; 信号星座生成模块，被配置为生成一个或多个信号星座; 一个或多个调制器被配置为使用混合多维编码调制生成一个或多个信号; 修正的正交多项式生成模块，被配置为生成用作电基函数的修正正交多项式; 以及一个或多个模式多路复用器和发射机，被配置为通过传输介质来模式复用和发送一个或多个LDPC编码的数据流。

公开(公告)号：US09059888B2

公开(公告)日：2015-06-16

申请号：US13767181

申请日：2013-02-14

Applicant: NEC Laboratories America, Inc.

Inventor： Philip Nan Ji ,  Ting Wang ,  Yoshiaki Aono

IPC: H04J14/00 ,  H04K1/10 ,  H04L27/28 ,  H04L27/26 ,  H04Q11/00

CPC classification number: H04L27/2697 ,  H04J14/0269 ,  H04J14/0298 ,  H04L27/2649 ,  H04Q2011/0032

Abstract: An optical network includes receiving inter-rack traffics from transmitter racks, converting by transmitters the inter-rack traffics to respective wavelength division multiplexing WDM optical signals, receiving and routing by a cyclic interleaver the optical signals from the transmitters to output ports in a cyclic manner, converting respective routed optical signals from the cyclic interleaver into respective electrical signals, and demodulating OFDM formats from respective converted optical signals containing signals for respective receiver racks.

Abstract translation: 光网络包括从发射机机架接收机架间业务，由发射机将机架间业务转换为相应的波分复用WDM光信号，通过循环交织器将光信号从发射机以循环方式传送到输出端口 将来自循环交织器的各个路由光信号转换成各自的电信号，以及从包含相应接收机机架的信号的各个转换的光信号中解调OFDM格式。

公开(公告)号：US20150117316A1

公开(公告)日：2015-04-30

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

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。

公开(公告)号：US20150104197A1

公开(公告)日：2015-04-16

申请号：US14504428

申请日：2014-10-02

Applicant: NEC Laboratories America, Inc.

Inventor： Ivan Djordjevic ,  Ting Wang

IPC: H04B10/50 ,  H04L1/00

CPC classification number: H04L1/0041 ,  H03M13/00 ,  H03M13/255 ,  H04B10/516 ,  H04B10/6163 ,  H04L1/005 ,  H04L1/0058 ,  H04L25/067 ,  H04L27/3405

Abstract: A method to process applicable to coherent optical channels with either linear or nonlinear phase noise includes: splitting a received sequence of data into clusters of points according to a cumulative log-likelihood function from constellation obtained in a previous iteration; generating new constellation points by calculating a center of mass of the clusters of points; repeating until convergence or until a predetermined number of iterations has been reached to determine a signal constellation; and transmitting signals over the coherent optical channels with nonlinear phase noise using the disclosed signal constellation and LDPC-coded modulation concepts.

Abstract translation: 一种适用于具有线性或非线性相位噪声的相干光信道的方法包括：根据来自先前迭代中获得的星座的累积对数似然函数，将接收到的数据序列分解成点群; 通过计算点聚类的质心产生新的星座点; 重复直到收敛或直到达到预定数量的迭代以确定信号星座; 以及使用所公开的信号星座图和LDPC编码的调制概念，通过具有非线性相位噪声的相干光信道发射信号。

公开(公告)号：US08989197B2

公开(公告)日：2015-03-24

申请号：US13855446

申请日：2013-04-02

Applicant: NEC Laboratories America, Inc. ,  NEC Corporation

Inventor： Philip N. Ji ,  Ryuji Aida ,  Ting Wang

IPC: H04L12/28 ,  H04Q11/00

CPC classification number: H04Q11/0005 ,  H04L12/28 ,  H04Q11/00 ,  H04Q2011/0016

Abstract: Methods and systems for optical communication in a submarine network are provided. An input signal is received from a terminal at a reconfigurable branching unit (BU), wherein the BU enables bidirectional transmission between any two terminals, and the input signal is demultiplexed into at least one individual waveband or wavelength using at least one demultiplexer. Each demultiplexed waveband is passed through optical switches, with corresponding optical switches for the same demultiplexed waveband provided for transmission in the reverse direction. Independent per-waveband switching is performed using a demultiplexer-switch-multiplexer (DSM) architecture. Each demultiplexed waveband is multiplexed at each output port using at least one multiplexer to combine signals from different sources, and combined signals are transmitted to a destination terminal.

Abstract translation: 提供了海底网络光通信的方法和系统。 在可重构分支单元（BU）处从终端接收输入信号，其中BU使能任何两个终端之间的双向传输，并且使用至少一个解复用器将输入信号解复用为至少一个单独的波段或波长。 每个解复用的波段通过光开关，其中相应的光开关用于相反的解复用波段，用于反向传输。 使用解复用器 - 开关多路复用器（DSM）架构来执行独立的每波段切换。 每个解复用波段在每个输出端口使用至少一个多路复用器进行多路复用以组合来自不同源的信号，并且组合信号被发送到目的地终端。

公开(公告)号：US20150043680A1

公开(公告)日：2015-02-12

申请号：US14456427

申请日：2014-08-11

Applicant: NEC Laboratories America, Inc.

Inventor： Eduardo Mateo Rodriquez ,  Fatih Yaman ,  Shaoliang Zhang ,  Ting Wang

IPC: H04L27/20

CPC classification number: H04L27/2067 ,  H04B2201/709709 ,  H04L25/03343

Abstract: This invention proposes an alternative modulation format for channels that present improved performance when such channels co-propagate with existing intensity modulated channels. This modulation format is named Rhombic-QPSK (R-QPSK) and it is designed in such a way that it presents more tolerance to phase noise created by the nonlinear interaction with the legacy channels.

Abstract translation: 本发明提出了一种用于在这种信道与现有的强度调制信道共同传播时呈现改善的性能的信道的替代调制格式。 该调制格式被称为菱形QPSK（R-QPSK），并且它被设计成使得它对由与传统通道的非线性相互作用产生的相位噪声具有更大的容限。

公开(公告)号：US08953939B2

公开(公告)日：2015-02-10

申请号：US13667708

申请日：2012-11-02

Applicant: NEC Laboratories America, Inc.

Inventor： Shaoliang Zhang ,  Dayou Qian ,  Junqiang Hu ,  Lei Xu ,  Ting Wang

IPC: H04J14/06 ,  H04B10/04 ,  H04B10/12 ,  H04B10/50

CPC classification number: H04J14/06 ,  H04B10/5055

Abstract: Disclosed are universal QPSK transmitter structures and methods for generating different QPSK signals exhibiting different polarization schemes, namely PolMux, PolMod and PolSw. The bit rate of the generated signals is variable, thereby allowing the transmitter to adjust to varying network traffic conditions. Advantageously, the generated signals may be detected by analog receivers (PolSw-QPSK) and coherent receivers (PolMux-QPSK, PolMod-QPSK, and PolSw-QPSK).

Abstract translation: 公开了用于产生表现出不同偏振方案的不同QPSK信号的通用QPSK发射机结构和方法，即PolMux，PolMod和PolSw。 所产生的信号的比特率是可变的，从而允许发射机适应不同的网络业务状况。 有利地，所产生的信号可以由模拟接收机（PolSw-QPSK）和相干接收机（PolMux-QPSK，PolMod-QPSK和PolSw-QPSK）来检测。