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    Network fragmentation measurement in an optical wavelength division multiplexing (WDM) network
    3.
    发明授权
    Network fragmentation measurement in an optical wavelength division multiplexing (WDM) network 有权
    光波分复用（WDM）网络中的网络碎片测量

    公开(公告)号：US09166723B2

    公开(公告)日：2015-10-20

    申请号：US14177654

    申请日：2014-02-11

    Applicant: NEC Laboratories America, Inc.

    Inventor： Ankitkumar Patel ,  Philip Nan Ji

    IPC: H04J14/00 ,  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) finding K-shortest routes between each node pair (s, d), where s, dεV and |V|≦K, where V is a set of reconfigurable optical add-drop multiplexer (ROADM) nodes, (b) selecting unconsidered node pair (s, d), (c) selecting unconsidered route k between nodes s and d out of the K-shortest routes, (d) finding a bit map of route k by performing bit-wise logical AND operation on bit vectors of fibers along route k, (e) selecting unconsidered line rate l out of offered set L of line rates, and (f) finding a probability αls,d,k of provisioning a connection with line rate l. 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）找到每个节点对（s，d）之间的K个最短路径，其中s，d＆egr; V和| V |和nlE; K，其中V是可重配置光分插复用器（ROADM） 节点，（b）选择未考虑的节点对（s，d），（c）从K个最短路由中的节点s和d之间选择未被考虑的路由k，（d）通过逐位执行寻找路由k的位图 沿着路线k对光纤的位向量进行逻辑与运算，（e）从所提供的线路速率集合L中选择未考虑的线路速率l，以及（f）找到用线路速率l提供连接的概率αls，d，k。 还公开了其他装置，系统和方法。

    Network Fragmentation Measurement in an Optical Wavelength Division Multiplexing (WDM) Network
    5.
    发明申请
    Network Fragmentation Measurement in an Optical Wavelength Division Multiplexing (WDM) Network 有权
    光波分复用（WDM）网络中的网络分段测量

    公开(公告)号：US20140226986A1

    公开(公告)日：2014-08-14

    申请号：US14177654

    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) finding K-shortest routes between each node pair (s, d), where s, d∈V and |V|≦K, where V is a set of reconfigurable optical add-drop multiplexer (ROADM) nodes, (b) selecting unconsidered node pair (s, d), (c) selecting unconsidered route k between nodes s and d out of the K-shortest routes, (d) finding a bit map of route k by performing bit-wise logical AND operation on bit vectors of fibers along route k, (e) selecting unconsidered line rate l out of offered set L of line rates, and (f) finding a probability αls,d,k of provisioning a connection with line rate l. 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）在每个节点对（s，d）之间找到K个最短路径，其中s，d∈V和| V |＆nlE; K，其中V是可重配置光分插复用器（ROADM） 节点，（b）选择未考虑的节点对（s，d），（c）从K个最短路由中的节点s和d之间选择未被考虑的路由k，（d）通过逐位执行寻找路由k的位图 沿着路线k对光纤的位向量进行逻辑与运算，（e）从所提供的线路速率集合L中选择未考虑的线路速率l，以及（f）找到用线路速率l提供连接的概率αls，d，k。 还公开了其他装置，系统和方法。

    Generic centralized architecture for software-defined networking with low latency one-way bypass communication
    8.
    发明授权
    Generic centralized architecture for software-defined networking with low latency one-way bypass communication 有权
    具有低延迟单向旁路通信的软件定义网络的通用集中式架构

    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。

    MULTI-LAYER VIRTUAL INFRASTRUCTURE EMBEDDING IN SOFTWARE-DEFINED FLEXIBLE-GRID TRANSPORT NETWORKS
    9.
    发明申请
    MULTI-LAYER VIRTUAL INFRASTRUCTURE EMBEDDING IN SOFTWARE-DEFINED FLEXIBLE-GRID TRANSPORT NETWORKS 有权
    软件定义灵活运输网络中的多层虚拟基础设施嵌入

    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。

    FLEXIBLE-CLIENT, FLEXIBLE-LINE INTERFACE TRANSPONDER
    10.
    发明申请
    FLEXIBLE-CLIENT, FLEXIBLE-LINE INTERFACE TRANSPONDER 有权
    柔性客户端，灵活线路接口传输器

    公开(公告)号：US20150181316A1

    公开(公告)日：2015-06-25

    申请号：US14573483

    申请日：2014-12-17

    Applicant: NEC Laboratories America, Inc.

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

    IPC: H04Q11/00

    CPC classification number: H04Q11/0005 ,  H04J3/1664 ,  H04J2203/0012 ,  H04J2203/0019 ,  H04Q11/0062

    Abstract: Methods and systems for flexible-client, flexible-link optical transponders include electrical-to-optical transponders, which accept client data from a flow distributor, and a first multiplexing switch that connects modulated optical carriers from the transponders to line interfaces. The electrical-to-optical transponders each include a flexible optical transport unit (OTU) framer module that compresses multiple optical data units (ODUs) into a single ODU having a higher order than any of the input ODUs to form an optical transport network (OTN) frame. An electrical-to-optical modulator modulates OTN frames onto a carrier. The transponder includes a second multiplexing switch that accepts optical carriers from line interfaces and optical-to-electrical transponders that accept modulated optical carriers from the second multiplexing switch. Each optical-to-electrical transponder includes a photodetector to convert the modulated optical carriers to the electrical domain and a flexible OTU framer module that decompresses received ODUs in OTN frames into multiple ODUs to form a bit stream.

    Abstract translation: 灵活客户端，灵活链路光转发器的方法和系统包括接收来自流分发器的客户端数据的电 - 光转发器，以及将来自应答器的调制光载波连接到线路接口的第一复用交换机。 电光转发器每个都包括柔性光传输单元（OTU）成帧器模块，其将多个光数据单元（ODU）压缩成具有比任何输入ODU高的单个ODU，以形成光传输网络（OTN ）框架。 电光调制器将OTN帧调制到载波上。 应答器包括第二复用开关，其接收来自线路接口的光载波和接收来自第二复用交换机的调制光载波的光电转发器。 每个光电转发器包括用于将经调制的光载波转换成电域的光电检测器，以及将OTN帧中接收的ODU解压缩成多个ODU以形成比特流的灵活OTU成帧器模块。

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