公开(公告)号：US20170350734A1

公开(公告)日：2017-12-07

申请号：US15596043

申请日：2017-05-16

Applicant: NEC Laboratories America, Inc.

Inventor： Philip Nan Ji ,  Ting Wang

IPC: G01D5/353 ,  G02F1/125 ,  G02F1/335

CPC classification number: G02F1/335 ,  G01D5/35306 ,  G01D5/35358 ,  G02F1/125

Abstract: A sensing system adapted to receive backscattered signal from a sensing fiber includes a first Faraday rotator mirror; a second Faraday rotator mirror; an optical hybrid coupled to the Faraday rotator mirrors, wherein one of the mirrors is coupled with an optical path difference; a 3-port optical circulator coupled to the sensing fiber and the optical hybrid; a first photodetector coupled to the circulator; and three photodetectors coupled to the optical hybrid.

公开(公告)号：US09654246B2

公开(公告)日：2017-05-16

申请号：US14938771

申请日：2015-11-11

Applicant: NEC Laboratories America, Inc.

Inventor： Philip Nan Ji ,  Ryuji Aida ,  Ting Wang

IPC: H04J14/02

CPC classification number: H04J14/0212 ,  H04J14/0204 ,  H04J14/0205 ,  H04J14/0216 ,  H04J14/0221

Abstract: A reconfigurable optical add/drop multiplexer (ROADM) unit includes a first optical circulator coupled to a first terminal; a second optical circulator coupled to a second terminal; a third optical circulator coupled to a third terminal; a fourth optical circulator coupled to a fourth terminal; a first wavelength-selective switch (WSS), coupled to the first, second, and third optical circulators; a second WSS coupled to the first, second, and fourth optical circulators, wherein the first and second WSSes are bidirectional operated; a first 1:2 coupler positioned between the first circulator and the first and second WSSes; a second 1:2 coupler positioned between the second circulator and the first and second WSSes.

公开(公告)号：US09450805B2

公开(公告)日：2016-09-20

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: G06F15/173 ,  H04L12/24 ,  H04L12/721 ,  H04L12/717

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，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。

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：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：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：US20140226985A1

公开(公告)日：2014-08-14

申请号：US14177667

申请日：2014-02-11

Applicant: NEC Laboratories America, Inc.

Inventor： Ankitkumar Patel ,  Philip Nan Ji

IPC: H04J14/02 ,  H04L12/721

CPC classification number: H04J14/021 ,  H04J14/0224 ,  H04J14/0257 ,  H04L45/12

Abstract: A method implemented in a network apparatus used in a wavelength division multiplexing (WDM) optical network is disclosed. The method includes (a) selecting unconsidered virtual link (VL) (i,j) with a maximum cost, a cost being requested line rate rij on VL(i, j)×shortest distance between nodes i and j, (b) selecting unconsidered route k out of K-shortest routes between nodes i and j of VL(i, j), (c) determining a bit map of unconsidered route k, (d) finding a modulation format that supports requested line rate rij with minimum spectrum ⌈ r ij s z ⌉ , where Sz is spectral efficiency with which the modulation format transmits a channel, (e) finding ⌈ r ij s z ⌉ consecutive spectrum slots at M lowest wavelengths in the bit map of selected route k, and (f) determining fragmentation factor Fkm after provisioning a channel at each wavelength m on selected route k, where 1≦m≦M. Other apparatuses, systems, and methods also are disclosed.

Abstract translation: 公开了一种在波分多路复用（WDM）光网络中使用的网络装置中实现的方法。 该方法包括（a）以最大成本选择未考虑的虚拟链路（VL）（i，j），在VL（i，j）上请求线路速率rij的成本×节点i和j之间的最短距离，（b）选择 在VL（i，j）的节点i和j之间的k个最短路由中未考虑路由k，（c）确定未考虑路由k的位图，（d）找到支持所需线路速率rij的调制格式，具有最小频谱 ⌈r ij sz⌉，其中Sz是调制格式发送信道的频谱效率，（e）在所选路由k的位图中的M个最低波长处找到⌈r ij sz⌉个连续频谱，，以及（f）确定 在选择的路由k上为每个波长m提供信道之后的分段因子Fkm，其中1＆nlE; m＆nlE; M。 还公开了其他装置，系统和方法。

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。