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    Resilience in an access subnetwork ring
    1.
    发明授权
    Resilience in an access subnetwork ring 有权
    访问子网环中的弹性

    公开(公告)号：US08929738B2

    公开(公告)日：2015-01-06

    申请号：US13484115

    申请日：2012-05-30

    申请人： Stefan Dahlfort ,  Ming Xia

    发明人： Stefan Dahlfort ,  Ming Xia

    IPC分类号： H04J14/02

    CPC分类号： H04J14/0209 ,  H04J14/021 ,  H04J14/0212 ,  H04J14/0213

    摘要： Embodiments herein include a resilient add-drop module for use in one of multiple access subnetwork nodes forming an access subnetwork ring. The module comprises a dual-arm passive optical filter and a cyclic arrayed waveguide grating (AWG). The dual-arm passive optical filter is configured to resiliently drop any wavelength channels within a fixed band uniquely allocated to the access subnetwork node from either arm of the access subnetwork ring and to resiliently add any wavelength channels within the fixed band to both arms of the access subnetwork ring. The cyclic AWG is correspondingly configured to demultiplex wavelength channels dropped by the dual-arm filter and to multiplex wavelength channels to be added by the dual-arm filter. Configured in this way, the module in at least some embodiments advantageously reduces the complexity and accompanying cost of nodes in an optical network, while also providing resilience against fiber and node failures.

    摘要翻译： 本文的实施例包括用于在形成接入子网环的多个接入子网节点之一中使用的弹性分插模块。 该模块包括双臂无源光滤波器和循环阵列波导光栅（AWG）。 双臂无源光学滤波器被配置为弹性地将任何波长信道弹性地放置在从接入子网络环的任一臂唯一地分配给接入子网节点的固定频带内，并将固定频带内的任何波长信道弹性地添加到 访问子网环。 相应地，循环AWG配置为对由双臂滤波器丢弃的波长信道进行解复用，并复用由双臂滤波器添加的波长信道。 以这种方式配置，至少一些实施例中的模块有利地降低光网络中的节点的复杂性和伴随的成本，同时还提供针对光纤和节点故障的弹性。

    METHOD FOR SPLIT SPECTRUM SIGNALLING IN AN OPTICAL NETWORK
    2.
    发明申请
    METHOD FOR SPLIT SPECTRUM SIGNALLING IN AN OPTICAL NETWORK 有权
    用于在光网络中分离信号的方法

    公开(公告)号：US20140205296A1

    公开(公告)日：2014-07-24

    申请号：US13881667

    申请日：2012-05-16

    申请人： Stefan Dahlfort ,  Daniele Ceccarlli ,  Ming Xia

    发明人： Stefan Dahlfort ,  Daniele Ceccarlli ,  Ming Xia

    IPC分类号： H04J14/02

    CPC分类号： H04J14/0267 ,  H04J14/0224 ,  H04J14/0257 ,  H04J14/0258 ,  H04J14/026 ,  H04Q11/02

    摘要： The example embodiments presented herein are directed towards an Optical Network Element, ONE, node (14), and corresponding method therein, for establishing multiple spectral routing in an optical transport network. The establishment of the multiple spectral routing features the use of a Split-Spectrum Label, SSL, (11) which comprises multiple definitions for spectral slots, where each definition has an absolute starting and an absolute ending frequency allocation.

    摘要翻译： 这里呈现的示例实施例针对光网络元件ONE（节点）（14）及其中的相应方法，用于在光传输网络中建立多个光谱路由。 多光谱路由的建立特征在于使用分裂频谱标签SSL（11），其包括用于频谱时隙的多个定义，其中每个定义具有绝对起始和绝对结束频率分配。

    Optical-layer multipath protection for optical network
    3.
    发明授权
    Optical-layer multipath protection for optical network 有权
    光网络光层多径保护

    公开(公告)号：US09002194B2

    公开(公告)日：2015-04-07

    申请号：US13542310

    申请日：2012-07-05

    申请人： Ming Xia ,  Stefan Dahlfort

    发明人： Ming Xia ,  Stefan Dahlfort

    IPC分类号： H04B10/00 ,  H04J14/02

    CPC分类号： H04J14/0298

    摘要： A multi-path provisioning scheme is provided to ensure full protection while reducing or minimizing resource overbuild. A signal to be provisioned is divided at a source node into a plurality of sub-signals that are independently routed from the source node to a destination node. Bandwidth for back-up traffic B is allocated in addition to bandwidth for primary traffic T. In some embodiments, the initial bandwidth B of the backup traffic equals the bandwidth of the primary traffic. The T+B traffic is initially distributed so that no link carries more than B traffic. The traffic distribution pattern is then iteratively revised to reduce the bandwidth requirements for the backup traffic while still meeting requirements for protection.

    摘要翻译： 提供多路径供应方案，以确保完全保护，同时减少或最小化资源过度建设。 要供应的信号在源节点被划分成从源节点独立地路由到目的地节点的多个子信号。 备用流量B的带宽除了主流量T的带宽之外还被分配。在一些实施例中，备份流量的初始带宽B等于主流量的带宽。 最初分发T + B流量，使得没有链路承载超过B流量。 然后迭代地修改流量分布模式，以减少备份流量的带宽需求，同时仍然满足保护要求。

    RESILIENCE IN AN ACCESS SUBNETWORK RING
    6.
    发明申请
    RESILIENCE IN AN ACCESS SUBNETWORK RING 有权
    访问子网环中的可靠性

    公开(公告)号：US20130322883A1

    公开(公告)日：2013-12-05

    申请号：US13484115

    申请日：2012-05-30

    申请人： Stefan Dahlfort ,  Ming Xia

    发明人： Stefan Dahlfort ,  Ming Xia

    IPC分类号： H04B10/20 ,  H04J14/02

    CPC分类号： H04J14/0209 ,  H04J14/021 ,  H04J14/0212 ,  H04J14/0213

    摘要： Embodiments herein include a resilient add-drop module for use in one of multiple access subnetwork nodes forming an access subnetwork ring. The module comprises a dual-arm passive optical filter and a cyclic arrayed waveguide grating (AWG). The dual-arm passive optical filter is configured to resiliently drop any wavelength channels within a fixed band uniquely allocated to the access subnetwork node from either arm of the access subnetwork ring and to resiliently add any wavelength channels within the fixed band to both arms of the access subnetwork ring. The cyclic AWG is correspondingly configured to demultiplex wavelength channels dropped by the dual-arm filter and to multiplex wavelength channels to be added by the dual-arm filter. Configured in this way, the module in at least some embodiments advantageously reduces the complexity and accompanying cost of nodes in an optical network, while also providing resilience against fiber and node failures.

    摘要翻译： 本文的实施例包括用于在形成接入子网环的多个接入子网节点之一中使用的弹性分插模块。 该模块包括双臂无源光滤波器和循环阵列波导光栅（AWG）。 双臂无源光学滤波器被配置为弹性地将任何波长信道弹性地放置在从接入子网络环的任一臂唯一地分配给接入子网节点的固定频带内，并将固定频带内的任何波长信道弹性地添加到 访问子网环。 相应地，循环AWG配置为对由双臂滤波器丢弃的波长信道进行解复用，并复用由双臂滤波器添加的波长信道。 以这种方式配置，至少一些实施例中的模块有利地降低光网络中的节点的复杂性和伴随的成本，同时还提供针对光纤和节点故障的弹性。

    OPTICAL-LAYER MULTIPATH PROTECTION FOR OPTICAL NETWORK
    7.
    发明申请
    OPTICAL-LAYER MULTIPATH PROTECTION FOR OPTICAL NETWORK 有权
    光学网络的光层多路保护

    公开(公告)号：US20130266305A1

    公开(公告)日：2013-10-10

    申请号：US13542310

    申请日：2012-07-05

    申请人： Ming Xia ,  Stefan Dahlfort

    发明人： Ming Xia ,  Stefan Dahlfort

    IPC分类号： H04B10/00

    CPC分类号： H04J14/0298

    摘要： A multi-path provisioning scheme is provided to ensure full protection while reducing or minimizing resource overbuild. A signal to be provisioned is divided at a source node into a plurality of sub-signals that are independently routed from the source node to a destination node. Bandwidth for back-up traffic B is allocated in addition to bandwidth for primary traffic T. In some embodiments, the initial bandwidth B of the backup traffic equals the bandwidth of the primary traffic. The T+B traffic is initially distributed so that no link carries more than B traffic. The traffic distribution pattern is then iteratively revised to reduce the bandwidth requirements for the backup traffic while still meeting requirements for protection.

    摘要翻译： 提供多路径供应方案，以确保完全保护，同时减少或最小化资源过度建设。 要供应的信号在源节点被划分成从源节点独立地路由到目的地节点的多个子信号。 备用流量B的带宽除了主流量T的带宽之外还被分配。在一些实施例中，备份流量的初始带宽B等于主流量的带宽。 最初分发T + B流量，使得没有链路承载超过B流量。 然后迭代地修改流量分布模式，以减少备份流量的带宽需求，同时仍然满足保护要求。

    Method for routing and spectrum assignment
    8.
    发明授权
    Method for routing and spectrum assignment 有权
    路由和频谱分配方法

    公开(公告)号：US09252912B2

    公开(公告)日：2016-02-02

    申请号：US13542295

    申请日：2012-07-05

    申请人： Ming Xia ,  Stefan Dahlfort

    发明人： Ming Xia ,  Stefan Dahlfort

    IPC分类号： H04J14/00 ,  H04Q11/00 ,  H04J14/02

    CPC分类号： H04J14/0257 ,  H04J14/0267 ,  H04Q11/0066 ,  H04Q11/0067 ,  H04Q2011/0064 ,  H04Q2011/0086

    摘要： Methods and apparatus are disclosed for performing a spectrum assignment and route selection algorithm in an optical WDM network. The optical WDM is assigned an optical band of frequencies. In accordance to the present invention, a new spectrum assignment in the optical band always adjoins a spectrum assignment previously allocated. The very first spectrum assignment may be made to start with one end frequency in the optical band. Given a spectrum demand, one or more spectrum assignments are identified and one or more feasible routes are determined. Among the one or more feasible routes, an optimal route may be selected based on a set of pre-defined criteria. The spectrum assignment and route selection algorithm disclosed herein reduces computational complexities and improves spectrum efficiencies.

    摘要翻译： 公开了用于在光WDM网络中执行频谱分配和路由选择算法的方法和装置。 光学WDM被分配一个频带的光带。 根据本发明，光带中的新频谱分配总是与先前分配的频谱分配相邻。 可以使第一频谱分配从光带中的一个终端频率开始。 给定频谱需求，识别一个或多个频谱分配，并确定一个或多个可行路线。 在一个或多个可行路线中，可以基于一组预定义标准来选择最优路线。 本文公开的频谱分配和路由选择算法降低了计算复杂度并提高了频谱效率。

    METHOD FOR ROUTING AND SPECTRUM ASSIGNMENT
    10.
    发明申请
    METHOD FOR ROUTING AND SPECTRUM ASSIGNMENT 有权
    路由和频谱分配方法

    公开(公告)号：US20130266316A1

    公开(公告)日：2013-10-10

    申请号：US13542295

    申请日：2012-07-05

    申请人： Ming Xia ,  Stefan Dahlfort

    发明人： Ming Xia ,  Stefan Dahlfort

    IPC分类号： H04Q11/00

    CPC分类号： H04J14/0257 ,  H04J14/0267 ,  H04Q11/0066 ,  H04Q11/0067 ,  H04Q2011/0064 ,  H04Q2011/0086

    摘要： Methods and apparatus are disclosed for performing a spectrum assignment and route selection algorithm in an optical WDM network. The optical WDM is assigned an optical band of frequencies. In accordance to the present invention, a new spectrum assignment in the optical band always adjoins a spectrum assignment previously allocated. The very first spectrum assignment may be made to start with one end frequency in the optical band. Given a spectrum demand, one or more spectrum assignments are identified and one or more feasible routes are determined. Among the one or more feasible routes, an optimal route may be selected based on a set of pre-defined criteria. The spectrum assignment and route selection algorithm disclosed herein reduces computational complexities and improves spectrum efficiencies.

    摘要翻译： 公开了用于在光WDM网络中执行频谱分配和路由选择算法的方法和装置。 光学WDM被分配一个频带的光带。 根据本发明，光带中的新频谱分配总是与先前分配的频谱分配相邻。 可以使第一频谱分配从光带中的一个终端频率开始。 给定频谱需求，识别一个或多个频谱分配，并确定一个或多个可行路线。 在一个或多个可行路线中，可以基于一组预定义标准来选择最优路线。 本文公开的频谱分配和路由选择算法降低了计算复杂度并提高了频谱效率。