公开(公告)号：US20090060498A1

公开(公告)日：2009-03-05

申请号：US11850454

申请日：2007-09-05

申请人： Michael B. Libeskind ,  Dat D. Ngo

发明人： Michael B. Libeskind ,  Dat D. Ngo

IPC分类号： H04B10/08 ,  H04B17/00

CPC分类号： H04B10/0775

摘要： An apparatus and method for deriving fiber characteristics between two nodes in an optical communication network are disclosed. A roundtrip time for a signal to travel between two nodes is measured by sending the signal via the optical supervisory channel from a first node to a second node, which is configured for loopback operation. Fiber characteristics can be calculated based on the measured roundtrip time.

摘要翻译： 公开了一种用于在光通信网络中的两个节点之间导出光纤特性的装置和方法。 通过经由光监视信道从第一节点向第二节点发送信号来测量用于在两个节点之间传播信号的往返时间，其被配置为用于环回操作。 光纤特性可以根据测量的往返时间计算。

公开(公告)号：US08305881B2

公开(公告)日：2012-11-06

申请号：US10919618

申请日：2004-08-17

申请人： Robert S. Harby ,  David S. Levy ,  Dat D. Ngo ,  James Dorian Sandoz ,  Charles Small

发明人： Robert S. Harby ,  David S. Levy ,  Dat D. Ngo ,  James Dorian Sandoz ,  Charles Small

IPC分类号： H04B10/17 ,  H04B10/08 ,  H04B10/12 ,  H04J14/02

CPC分类号： H04J14/0227 ,  H04J3/085 ,  H04J3/14 ,  H04J14/0226 ,  H04J14/0241 ,  H04J14/0246 ,  H04J14/0247 ,  H04J14/0283 ,  H04J14/0295

摘要： A method and system for maximizing wavelength reuse in an optically protected wavelength-division-multiplexed (WDM) network, the WDM network supporting a plurality of service connections, includes associating service connections supported by non-overlapping paths to form respective service channel groups, and for each service channel group, assigning at least one common wavelength channel for establishing the service connections. In addition, for each of said groups, at least one common wavelength channel is assigned for establishing a shared protection path for the service connections of each of said groups. In addition, the wavelength channels assigned for establishing the shared protection paths for each of the groups may be used for providing service connections for the WDM network when not in use as shared protection paths. However such provisional service connections are dropped when the wavelength channels are needed to establish shared protection paths. Such provisional service connections may be offered at reduced cost.

摘要翻译： 一种用于在光保护的波分复用（WDM）网络中支持多个服务连接的WDM网络中最大化波长重用的方法和系统包括：将由非重叠路径支持的服务连接相关联以形成相应的服务信道组，以及 对于每个服务信道组，分配用于建立服务连接的至少一个公共波长信道。 此外，对于每个所述组，分配至少一个公共波长信道以建立用于每个所述组的服务连接的共享保护路径。 此外，分配用于为每个组建立共享保护路径的波长信道可用于在不用作共享保护路径时为WDM网络提供服务连接。 然而，当需要波长信道来建立共享保护路径时，这种临时业务连接被丢弃。 这样的临时服务连接可以以降低的成本提供。

公开(公告)号：US08873947B2

公开(公告)日：2014-10-28

申请号：US11850454

申请日：2007-09-05

申请人： Michael B. Libeskind ,  Dat D. Ngo

发明人： Michael B. Libeskind ,  Dat D. Ngo

IPC分类号： H04B10/00 ,  H04B10/077

CPC分类号： H04B10/0775

摘要： An apparatus and method for deriving fiber characteristics between two nodes in an optical communication network are disclosed. A roundtrip time for a signal to travel between two nodes is measured by sending the signal via the optical supervisory channel from a first node to a second node, which is configured for loopback operation. Fiber characteristics can be calculated based on the measured roundtrip time.

摘要翻译： 公开了一种用于在光通信网络中的两个节点之间导出光纤特性的装置和方法。 通过经由光监视信道从第一节点向第二节点发送信号来测量用于在两个节点之间传播信号的往返时间，其被配置为用于环回操作。 光纤特性可以根据测量的往返时间计算。

公开(公告)号：US08417112B2

公开(公告)日：2013-04-09

申请号：US10448559

申请日：2003-05-30

申请人： Dat D. Ngo

发明人： Dat D. Ngo

IPC分类号： G02F1/00 ,  G02F2/00 ,  H04B10/00

CPC分类号： H04J14/0283 ,  H04J14/0295 ,  H04L43/0847 ,  H04L43/16 ,  H04Q11/0062 ,  H04Q2011/0081 ,  H04Q2011/0092

摘要： A switching method is provided having improved accuracy in monitoring a network to determine when to switch. The method collects and stores a plurality of bit error rate (BER) values. The BER values are analyzed using a BER hysterisis algorithm to check BER degradation. Thereafter, the method switches a transmission port when the degradation exceeds a predetermined BER threshold level for a predetermined period of time. In another embodiment, a feature which transmits a switch polling signal for a predetermined duration is used with the above switching method.

摘要翻译： 提供一种切换方法，其具有提高的监视网络的准确度以确定何时切换。 该方法收集并存储多个误码率（BER）值。 使用BER滞后算法分析BER值以检查BER降级。 此后，当劣化超过预定的BER阈值电平达预定时间时，该方法切换传输端口。 在另一个实施例中，以上述切换方法使用发送开关轮询信号预定持续时间的特征。