公开(公告)号：US09166728B2

公开(公告)日：2015-10-20

申请号：US13646392

申请日：2012-10-05

Applicant: NEC Laboratories America, Inc.

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

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

CPC classification number: H04J14/04 ,  H04B10/5055 ,  H04J14/06

Abstract: Systems and methods for data transport, comprising encoding one or more streams of input data using nonbinary low density parity check (NB-LDPC) encoders, corresponding to orthogonal polarization states. Receiving one or more streams of input data using a buffer coupled to the encoders, the data written to the buffer bR bits at a time, where R is the code rate. Generating one or more signals using a 2b-ary mapper implemented as a look-up table (LUT) to store coordinates of a corresponding signal constellation, the 2b-ary mapper configured to assign bits of one or more signals to a signal constellation and to associate the bits of the signals with signal constellation points, wherein the constellation is expanded to avoid bandwidth expansion due to coding, generating substantial net coding gains within a same bandwidth. Modulating nonbinary LDPC-coded data streams using in-phase/quadrature (I/Q) modulators and multiplexing the data streams using polarization beam combiner.

Abstract translation: 用于数据传输的系统和方法，包括使用对应于正交极化状态的非二进制低密度奇偶校验（NB-LDPC）编码器来编码一个或多个输入数据流。 使用耦合到编码器的缓冲器接收一个或多个输入数据流，每次写入缓冲器bR位的数据，其中R是码率。 使用实现为查找表（LUT）的2b-ary映射器来存储一个或多个信号来存储对应的信号星座的坐标，2b-ary映射器被配置为将一个或多个信号的位分配给信号星座，并且 将信号的位与信号星座点相关联，其中扩展星座以避免由于编码而导致的带宽扩展，从而在相同带宽内产生实质的网络编码增益。 使用同相/正交（I / Q）调制器调制非二进制LDPC编码数据流，并使用偏振束组合器复用数据流。

公开(公告)号：US09146359B2

公开(公告)日：2015-09-29

申请号：US13668193

申请日：2012-11-02

Applicant: NEC Laboratories America, Inc.

Inventor： Fatih Yaman ,  Eduardo Mateo ,  Lei Xu ,  Shaoliang Zhang ,  Ting Wang

IPC: G02B6/34 ,  G02B6/293

CPC classification number: G02B6/34 ,  G02B6/29319 ,  G02B6/29394

Abstract: Systems and methods are disclosed for enhancing optical communication by performing dispersion compensation in an optical fiber using a fiber Bragg grating (FBG); and providing increased degrees of freedoms (DOFs) to distinguish forward and backward propagating fields with a passive component.

Abstract translation: 公开了通过使用光纤布拉格光栅（FBG）在光纤中执行色散补偿来增强光通信的系统和方法; 并提供增加的自由度（DOF）来区分带有被动元件的前向和后向传播场。

公开(公告)号：US09131289B2

公开(公告)日：2015-09-08

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: H04J14/00 ,  H04B10/20 ,  H04Q11/00 ,  H04J14/02

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：US20150215044A1

公开(公告)日：2015-07-30

申请号：US14607075

申请日：2015-01-28

Applicant: NEC Laboratories America, Inc.

Inventor： Neda Cvijetic ,  Akihiro Tanaka ,  Ting Wang

IPC: H04B10/2575 ,  H04Q11/00 ,  H04B10/27

CPC classification number: H04Q11/0005 ,  H04J14/0256 ,  H04J14/0284 ,  H04L41/12 ,  H04L43/0811 ,  H04L49/00 ,  H04Q11/0062 ,  H04Q11/0067

Abstract: A method includes providing run-time optical 5G mobile fronthaul MFH topology re-configurability through software-defined control of both optical circuit switches and electrical packet switches readily accommodating unpredictable traffic patterns and low latency optical by-pass based device-to-device connectivity. The providing includes employing an optical any-to-any switch for wavelength-tunable and fixed-wavelength optical transceivers.

Abstract translation: 一种方法包括通过软件定义的光电路交换机和电子分组交换机的软件定义控制来提供运行时光学5G移动前端MFH拓扑可重新配置，这些控制器容易适应不可预测的流量模式和低延迟光纤旁路基于设备到设备的连接。 该提供包括采用用于波长可调谐和固定波长光收发器的光学任意到任何开关。

公开(公告)号：US20150162937A1

公开(公告)日：2015-06-11

申请号：US14567321

申请日：2014-12-11

Applicant: NEC Laboratories America, Inc.

Inventor： Shaoliang Zhang ,  Ting Wang ,  Yequn Zhang ,  Lei Xu

IPC: H03M13/35

CPC classification number: H03M13/353 ,  H03M13/1171 ,  H03M13/2906 ,  H03M13/6508

Abstract: A computer implemented method for dynamic data rate adjustment within a cascaded forward error correction FEC for optical communications includes subjecting data communicated over an optical network to a forward error correction in an encoding or decoding of the data, the encoding or decoding employing a codeword, re-encoding part of the codeword for generating a subsequent codeword where an actual code rate is tuned by adjusting a size of data encoded to provide re-encoded data, and dynamically changing the re-encoded data size to achieve cascaded rate adaptive FEC for communication of the data over the optical network.

Abstract translation: 用于光通信的级联前向纠错FEC中的用于动态数据速率调整的计算机实现方法包括：通过光网络传送的数据在数据的编码或解码中进行前向纠错，采用码字的编码或解码 - 用于生成后续码字的编码部分，用于生成后续码字，其中通过调整被编码以提供重新编码的数据的数据的大小来调整实际码率，并动态地改变重新编码的数据大小以实现用于通信的级联速率自适应FEC 光网络上的数据。

公开(公告)号：US20150104171A1

公开(公告)日：2015-04-16

申请号：US14506627

申请日：2014-10-04

Applicant: NEC Laboratories America, Inc.

Inventor： Junqiang Hu ,  Philip Nan Ji ,  Ting Wang ,  Yawei Yin

IPC: H04Q11/00

CPC classification number: H04Q11/0066 ,  H04Q2011/0064

Abstract: A switching system includes one or more line card for input processing, forwarding, queuing, and scheduling data, the line card having a tunable laser to select a wavelength according to the packets' destination for a given burst of packets, so that the burst is switched to a desired destination and sent all-optically to a connected interface; an all-optical switch fabric coupled to the line card to perform wavelength switching; and a centralized arbitrator that resolves the contention from different input ports.

Abstract translation: 交换系统包括用于输入处理，转发，排队和调度数据的一个或多个线路卡，该线路卡具有可调谐激光器，以针对给定的分组突发根据分组的目的地选择波长，使得突发是 切换到所需的目的地并全光发送到连接的接口; 耦合到线路卡以执行波长切换的全光交换结构; 以及解决来自不同输入端口的争用的集中仲裁器。

公开(公告)号：US20150093116A1

公开(公告)日：2015-04-02

申请号：US14504597

申请日：2014-10-02

Applicant: NEC Laboratories America, Inc.

Inventor： Ting Wang ,  Ryuji Aida ,  Philip Ji

IPC: H04B10/80

CPC classification number: H04Q11/0005 ,  H04B10/80 ,  H04J14/0205 ,  H04J14/0212 ,  H04J14/0213 ,  H04J14/0221 ,  H04Q11/0062 ,  H04Q2011/0037

Abstract: Systems and methods for method for data transport using secure reconfigurable branching units, including receiving signals from a first trunk terminal and a second trunk terminal by branching units. Broadcasting is prevented for secure information delivery by dividing, within the branching units, the one or more signals from the first trunk terminal and the second trunk terminal into two or more sections, and sending the two or More sections to an optical coupler. Signals may be received from a branch terminal by one or more branching units using two fiber pairs, and the signals from the branch terminals may be divided into two or more groups of optical sections, wherein one of the sections includes dummy light. The divided, signals from the first trunk terminal, the second trunk terminal, and dummy light from the branch terminal may be merged, and the merged signal sent to the branch terminal.

Abstract translation: 使用安全可重配置分支单元的数据传输方法的系统和方法，包括通过分支单元从第一中继线端子和第二干线端子接收信号。 通过在分支单元内将来自第一干线端子和第二干线端子的一个或多个信号分成两个或更多个部分，并将两个或更多个部分发送到光耦合器，来防止广播被安全地传送。 可以通过使用两个光纤对的一个或多个分支单元从分支终端接收信号，并且来自分支终端的信号可以被划分为两组或更多组光学部分，其中一个部分包括虚拟光。 来自第一中继线端子，第二干线端子和来自分支端子的虚拟光线的信号可以被合并，并且合并信号被发送到分支终端。

公开(公告)号：US08923457B2

公开(公告)日：2014-12-30

申请号：US13855168

申请日：2013-04-02

Applicant: NEC Laboratories America, Inc.

Inventor： Dayou Qian ,  Ting Wang

IPC: H04B10/2507 ,  H04L7/00 ,  H04L27/26 ,  H04L27/227 ,  H04L27/22 ,  H04B10/00 ,  H04B10/61 ,  H04L27/00

CPC classification number: H04L7/0079 ,  H04B10/6165 ,  H04B2210/075 ,  H04L27/223 ,  H04L27/2272 ,  H04L27/26 ,  H04L27/2657 ,  H04L27/2671 ,  H04L27/2675 ,  H04L27/2697 ,  H04L2027/0026

Abstract: A method for phase noise mitigation for a coherent receiver in either an OFDM or single carrier based transmission system including applying a frequency offset and coarse phase noise compensation based on a radio frequency RF tone or using a phase lock loop PLL m-th power procedure, responsive to a signal from a digital signal processed transmission with an added pilots signal over an optical system, applying fine phase noise compensation based on comparison of the pilots signal in a time domain, removing the pilots, and demodulating the remaining pilotless signal.

Abstract translation: 一种用于在基于OFDM或单载波的传输系统中的相干接收机的相位噪声减轻的方法，包括基于射频RF频调应用频偏和粗相位噪声补偿或使用锁相环PLL第m个功率过程， 响应来自具有在光学系统上添加的导频信号的数字信号处理的传输的信号，基于时域中的导频信号的比较，去除导频以及解调剩余的无引导信号来应用精细相位噪声补偿。

公开(公告)号：US20140379926A1

公开(公告)日：2014-12-25

申请号：US14312603

申请日：2014-06-23

Applicant: NEC Laboratories America, Inc.

Inventor： Ankitkumar Patel ,  Philip Ji ,  Ting Wang

IPC: H04L29/08

CPC classification number: H04L67/1002 ,  H04J14/0257 ,  H04L47/125 ,  H04Q11/0001

Abstract: A method entails an efficient procedure, namely Compute followed by Network Load Balancing (CNLB), that first maps virtual nodes over physical nodes while balancing computational resources of different types, and finally, maps virtual links over physical routes while balancing network spectral resources

Abstract translation: 一种方法需要一个有效的过程，即计算后跟网络负载平衡（CNLB），首先在物理节点上映射虚拟节点，同时平衡不同类型的计算资源，最后，通过物理路由映射虚拟链路，同时平衡网络频谱资源

公开(公告)号：US20140095685A1

公开(公告)日：2014-04-03

申请号：US14044177

申请日：2013-10-02

Applicant: NEC Laboratories America, Inc.

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

IPC: H04L12/24

CPC classification number: H04L41/00 ,  H04L41/022 ,  H04L41/04 ,  H04L41/044 ,  H04L41/12 ,  H04L45/38 ,  H04L45/42

Abstract: A generic centralized, software-defined networking configuration for connecting network is defined as a generic multi-layer topology network entities interconnected either vertically or horizontally regardless of the employed network topology/graph). This centralized configuration enables establishment of a connection between any two networking entities by 1) bypassing intermediate protocol layers and 2) eliminating any handshaking between peer elements of the same layer. The centralized software-defined controller notifies in parallel all involved network entities along a connection path to take all necessary actions (i.e. reconfiguration) to establish the new connection. The centralized controller has authority to control only entities that are software-defined SD.

Abstract translation: 用于连接网络的通用集中式软件定义网络配置被定义为垂直或水平互连的通用多层拓扑网络实体，而不管采用的网络拓扑/图形如何）。 这种集中式配置可以通过以下方式建立任何两个组网实体之间的连接：1）绕过中间协议层，以及2）消除同一层的对等体元素之间的任何握手。 集中式软件定义的控制器并行地通过连接路径并行地通知所有涉及的网络实体，以采取所有必要的动作（即重新配置）来建立新的连接。 集中控制器具有仅控制软件定义SD的实体的权限。