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11 条记录 (耗时 0.019 秒)

    Clock recovery
    3.
    发明授权
    Clock recovery 失效
    时钟恢复

    公开(公告)号：US5386311A

    公开(公告)日：1995-01-31

    申请号：US118928

    申请日：1993-09-09

    申请人： James A. Shields

    发明人： James A. Shields

    IPC分类号： H04B10/00 ,  H04B10/04 ,  H04B10/06 ,  H04B10/14 ,  H04B10/26 ,  H04B10/28 ,  H04L7/00 ,  H04L25/49

    CPC分类号： H04L7/0075 ,  H04L25/4908

    摘要： Optical clock recovery is performed on an optical signal containing both data and clock information by applying it to a photodetector and adding part of the resulting electrical signal to the bias of a self-pulsating laser diode so as to force its pulsation frequency to the frequency and phase of the clock component of the optical signal.

    摘要翻译： 对包含数据和时钟信息的光信号进行光时钟恢复，通过将光信号应用于光电检测器并将所得电信号的一部分加到自脉动激光二极管的偏压上，以迫使其脉动频率达到频率， 光信号的时钟分量的相位。

    Shared mesh signaling method and apparatus
    4.
    发明授权
    Shared mesh signaling method and apparatus 有权
    共享网状信令方法和装置

    公开(公告)号：US07450497B2

    公开(公告)日：2008-11-11

    申请号：US10195448

    申请日：2002-07-16

    申请人： Richard Trudel ,  Evert E. de Boer ,  James A. Shields

    发明人： Richard Trudel ,  Evert E. de Boer ,  James A. Shields

    IPC分类号： H04L12/26 ,  H04L12/28 ,  H04L12/56

    CPC分类号： H04J3/085 ,  H04J2203/0053 ,  H04J2203/006

    摘要： In a mesh network, a network element for providing protection switching in a 1:N shared mesh protection scheme having a first protection path associated with a pair of working paths selected from the N working paths is disclosed. The network element comprising: (a) a link for connecting the network element to a first working path of the pair of working paths in a path layer of the network, the path layer including a plurality of interconnected network elements; (b) a routing table accessible by the network element, the routing table for having local protection channel information associated with a local protection segment separate from the first protection path, the local protection segment connecting the network element and one of the interconnected network elements adjacent to the network element; and (c) an identification module for using the local protection channel information to identify an available protection channel on the local protection segment in the event of failure of a local working segment of the first working path, the local working segment connecting the network element and said one of the adjacent interconnected network elements; wherein the available local protection channel on the local protection segment is used to switch local network bandwidth from the failed local working segment to the local protection segment after the failure has been detected. Selection functions are also disclosed.

    摘要翻译： 在网状网络中，公开了一种用于在具有与从N个工作路径中选择的一对工作路径相关联的第一保护路径的1：N共享网格保护方案中提供保护倒换的网元。 所述网元包括：（a）用于将所述网络元件连接到所述网络的路径层中的所述一对工作路径的第一工作路径的链路，所述路径层包括多个互连的网络元件; （b）可由网元访问的路由表，所述路由表用于具有与与第一保护路径分离的本地保护段相关联的本地保护信道信息，连接网元的本地保护段和相邻的互连网元之一 到网元; 以及（c）识别模块，用于在第一工作路径的本地工作段发生故障的情况下使用本地保护信道信息来识别本地保护段上的可用保护信道，连接网元的本地工作段和 所述相邻互连网络元件之一; 其中本地保护段上的可用本地保护信道用于在检测到故障后将本地网络带宽从故障本地工作段切换到本地保护段。 还公开了选择功能。

    Shared mesh signaling algorithm and apparatus
    5.
    发明授权
    Shared mesh signaling algorithm and apparatus 有权
    共享网格信令算法和装置

    公开(公告)号：US06917759B2

    公开(公告)日：2005-07-12

    申请号：US10059344

    申请日：2002-01-31

    申请人： Evert E. de Boer ,  James A. Shields ,  Richard Trudel

    发明人： Evert E. de Boer ,  James A. Shields ,  Richard Trudel

    IPC分类号： H04J3/08 ,  H04Q11/04 ,  H04B10/00

    CPC分类号： H04J3/085 ,  H04J2203/0053 ,  H04J2203/006

    摘要： A shared mesh protection scheme defines an associated protection path when a working connection is established. During the protection path definition, the corresponding protection path information is sent down to a switch card of network elements making up the protection path. Upon detection of the failure, the network elements using an overhead byte message will inform the routing source network element of the connection of the failure in the working path. The overhead bytes used are interrupt driven bytes located in the line and path overhead of network traffic. The routing source node of the connection will then send the corresponding overhead byte messages down the protection path to provide for protection path establishment according to the preloaded data located at the switch card. It should be noted that each connection can have a source and termination element which relates to the source from where the corresponding connection was set-up rather than the direction of the payload transmission. Therefore, once the failure has occurred the source elements will send messages using overhead bytes to the corresponding network elements along the protection path. Accordingly, routing tables located at the switch card of the network elements, set-up when the working path connections were initially established, determine this dynamically allocated protection path environment.

    摘要翻译： 共享网格保护方案在建立工作连接时定义相关的保护路径。 在保护路径定义期间，相应的保护路径信息被发送到构成保护路径的网络元件的交换卡。 在检测到故障时，使用开销字节消息的网络元件将通知路由源网络元件在工作路径中的故障连接。 所使用的开销字节是位于网络流量的线路和路径开销中的中断驱动字节。 然后，连接的路由源节点将在保护路径下发送对应的开销字节消息，以根据位于交换机卡处的预加载数据提供保护路径建立。 应当注意，每个连接可以具有源和终端元件，该源和终端元件与其中相应连接被建立的源相关，而不是有效载荷传输的方向。 因此，一旦发生故障，源元素将使用开销字节将消息发送到沿着保护路径的相应网络元件。 因此，当工作路径连接初始建立时，位于网元的交换卡的路由表，建立起动态分配的保护路径环境。

    Shared mesh signaling method and apparatus
    6.
    发明授权
    Shared mesh signaling method and apparatus 有权
    共享网状信令方法和装置

    公开(公告)号：US08116196B2

    公开(公告)日：2012-02-14

    申请号：US12244373

    申请日：2008-10-02

    申请人： Richard Trudel ,  Evert E. deBoer ,  James A. Shields

    发明人： Richard Trudel ,  Evert E. deBoer ,  James A. Shields

    IPC分类号： H04L12/28 ,  H04L12/26 ,  H04L12/56 ,  G06F15/173

    CPC分类号： H04J3/085 ,  H04J2203/0053 ,  H04J2203/006

    摘要： In a mesh network, a network element for providing protection switching in a 1:N shared mesh protection scheme having a first protection path associated with a pair of working paths selected from the N working paths is disclosed. The network element comprising: (a) a link for connecting the network element to a first working path of the pair of working paths in a path layer of the network, the path layer including a plurality of interconnected network elements; (b) a routing table accessible by the network element, the routing table for having local protection channel information associated with a local protection segment separate from the first protection path, the local protection segment connecting the network element and one of the interconnected network elements adjacent to the network element; and (c) an identification module for using the local protection channel information to identify an available protection channel on the local protection segment in the event of failure of a local working segment of the first working path, the local working segment connecting the network element and said one of the adjacent interconnected network elements; wherein the available local protection channel on the local protection segment is used to switch local network bandwidth from the failed local working segment to the local protection segment after the failure has been detected. Selection functions are also disclosed.

    摘要翻译： 在网状网络中，公开了一种用于在具有与从N个工作路径中选择的一对工作路径相关联的第一保护路径的1：N共享网格保护方案中提供保护倒换的网元。 所述网元包括：（a）用于将所述网络元件连接到所述网络的路径层中的所述一对工作路径的第一工作路径的链路，所述路径层包括多个互连的网络元件; （b）可由网元访问的路由表，所述路由表用于具有与与第一保护路径分离的本地保护段相关联的本地保护信道信息，连接网元的本地保护段和相邻的互连网元之一 到网元; 以及（c）识别模块，用于在第一工作路径的本地工作段发生故障的情况下使用本地保护信道信息来识别本地保护段上的可用保护信道，连接网元的本地工作段和 所述相邻互连网络元件之一; 其中本地保护段上的可用本地保护信道用于在检测到故障后将本地网络带宽从故障本地工作段切换到本地保护段。 还公开了选择功能。

    Method and apparatus for digital data synchronization
    7.
    发明授权
    Method and apparatus for digital data synchronization 有权
    用于数字数据同步的方法和装置

    公开(公告)号：US07023942B1

    公开(公告)日：2006-04-04

    申请号：US09972686

    申请日：2001-10-09

    申请人： Kim B. Roberts ,  Ronald J. Gagnon ,  James A. Shields

    发明人： Kim B. Roberts ,  Ronald J. Gagnon ,  James A. Shields

    IPC分类号： H04L7/00

    CPC分类号： H04J3/0647 ,  H04J3/076 ,  H04J2203/0089

    摘要： Synchronization and desynchronization of a data signal transported in a synchronous frame across a synchronous communications network, such as SONET/SDH, reduces waiting-time jitter. A timing estimate (F) indicative of a relationship between a data rate (f1) of the data signal and a reference frequency (f2) of the synchronous communications network is calculated and communicated through the synchronous communications network, for example in the Synchronous Payload Envelope of a SONET frame. The data signal is recovered using a desynchronizer Phase-Locked Loop steered by the timing estimate (F). The timing estimate (F) can be any one or more of: a ratio between the data rate (f1) and the reference frequency (f2); a difference between the data rate (f1) and the reference frequency (f2); and a phase difference between a recovered data clock signal associated with the data rate (f1) and a reference clock signal associated with the reference frequency (f2).

    摘要翻译： 通过同步通信网络（如SONET / SDH）在同步帧中传输的数据信号的同步和去同步减少了等待时间抖动。 计算表示数据信号的数据速率（f 1）与同步通信网络的参考频率（f 2）之间的关系的定时估计（F），并通过同步通信网络进行通信，例如在同步通信网络 有效载荷SONET框架的信封。 使用由定时估计（F）控制的去同步器锁相环来恢复数据信号。 定时估计（F）可以是数据速率（f 1）和参考频率（f 2）之间的比率中的任何一个或多个; 数据速率（f 1）和参考频率（f 2）之间的差异; 以及与数据速率（f 1）相关联的恢复的数据时钟信号与与参考频率（f 2）相关联的参考时钟信号之间的相位差。

    Adaptive rate traffic recovery mechanism for communication networks
    8.
    发明授权
    Adaptive rate traffic recovery mechanism for communication networks 有权
    通信网络自适应速率业务恢复机制

    公开(公告)号：US06940808B1

    公开(公告)日：2005-09-06

    申请号：US09548667

    申请日：2000-04-13

    申请人： James A. Shields ,  Mark Allaye-Chan

    发明人： James A. Shields ,  Mark Allaye-Chan

    IPC分类号： H04J3/08 ,  H04Q11/04 ,  H04L12/26

    CPC分类号： H04J3/085 ,  H04J2203/0042 ,  H04J2203/0053 ,  H04J2203/006 ,  H04J2203/0085 ,  H04J2203/0096

    摘要： A traffic recovery mechanism for communication networks uses a layer-1 adaptive rate protection scheme that compliments layer-3 restoration mechanisms. The protection scheme allocates less bandwidth to the traffic during a protection switch than during the normal operating conditions. This scheme allows the network to roll off more gracefully from the perspective of the applications routed through it. Rate adaptation is effected by a new interface between the data equipment and the transport network, which switches information transfer rate between two or more predetermined levels.

    摘要翻译： 通信网络的业务恢复机制采用了第1层自适应速率保护方案，可以满足第3层恢复机制。 保护方案在保护开关期间比在正常操作条件下为流量分配更少的带宽。 该方案允许网络从通过它路由的应用程序的角度更优雅地滚出。 速率适配由数据设备和传输网络之间的新接口实现，其在两个或更多个预定级别之间切换信息传输速率。

    Apparatus and method for establishment and protection of connections within mesh networks
    10.
    发明授权
    Apparatus and method for establishment and protection of connections within mesh networks 有权
    用于建立和保护网状网络内连接的装置和方法

    公开(公告)号：US07372803B2

    公开(公告)日：2008-05-13

    申请号：US10107044

    申请日：2002-03-28

    申请人： Evert de Boer ,  James A. Shields ,  Richard Trudel ,  Malcolm Betts

    发明人： Evert de Boer ,  James A. Shields ,  Richard Trudel ,  Malcolm Betts

    IPC分类号： G01R31/08

    CPC分类号： H04L45/28 ,  H04L12/437 ,  H04L12/4637 ,  H04L45/00 ,  H04L45/22 ,  H04L45/586 ,  H04L45/60

    摘要： A node within a mesh network includes an Optical Connection Controller (OCC) and a network element. When a connection path within the mesh network is required, an OCC determines if a particular connection path requires a network element to operate as a virtual gateway to separate the mesh network into separate protection domains for that particular connection path. A connection path might require separate protection domains in cases in which the number of network elements and/or repeater/amplifier components for a particular connection path is greater than a threshold, the total length of links for the connection path is above a threshold and/or another factor that could cause the recovery time for the connection path to increase beyond an acceptable threshold level. If the OCC determines that one or more virtual gateways are required for a particular connection path, the OCC selects an appropriate network element within the network to operate as a virtual gateway for that particular connection path. Finally, the OCC assigns network elements and links to establish working and protection paths between the source network element and the virtual gateway and between the virtual gateway and the destination network element. This set-up can ensure that each connection path will have a recovery time after a failure within an acceptable range.

    摘要翻译： 网状网络内的节点包括光连接控制器（OCC）和网元。 当需要网状网络中的连接路径时，OCC确定特定连接路径是否要求网络元件作为虚拟网关进行操作，以将网状网络分离为用于该特定连接路径的单独的保护域。 在特定连接路径的网络元件和/或中继器/放大器组件的数量大于阈值的情况下，连接路径可能需要单独的保护域，连接路径的链路的总长度高于阈值和/ 或者可能导致连接路径的恢复时间增加超过可接受的阈值水平的另一个因素。 如果OCC确定特定连接路径需要一个或多个虚拟网关，则OCC选择网络内的适当网络元件作为该特定连接路径的虚拟网关进行操作。 最后，OCC分配网元和链路，建立源网元和虚拟网关之间以及虚拟网关与目的网元之间的工作和保护路径。 此设置可以确保每个连接路径在故障之后的恢复时间在可接受的范围内。