公开(公告)号：US06982977B2

公开(公告)日：2006-01-03

申请号：US09981887

申请日：2001-10-19

Applicant: Constantin Viorel Marian ,  Dan Oprea

Inventor： Constantin Viorel Marian ,  Dan Oprea

IPC: H04L12/56 ,  H04L12/28

CPC classification number: H04L45/54 ,  H04L45/02 ,  H04L45/04 ,  H04L45/50

Abstract: A packet routing/switching system and method are provided by which label switched routing is performed within a hierarchy of LSP/FA-LSPs defined/provisioned in a network of interconnected nodes. Rather than transmitting an entire label stack with an LSP label for each LSP/FA-LSP in the hierarchy, at a given node in the network, a single LSP label is transmitted together with a components label which contains a list of component identifiers which do not inherently identify LSP/FA-LSPs, but from which the full LSP/FA-LSP labels can be determined locally at each node using previously distributed information described in detail below. The list of component identifiers is a shorthand way identifying to adjacent nodes the identity of the LSP/FA-LSP hierarchy without transmitting the entire LSP labels and thus significantly reducing overhead. The single label which is transmitted is the label of the LSP/FA-LSP of which the given node forms a part.

公开(公告)号：US06903867B2

公开(公告)日：2005-06-07

申请号：US10195495

申请日：2002-07-16

Applicant: Eddie Kai Ho Ng ,  Ping Wai Wan ,  Derrick Remedios ,  Robert Michael Bierman ,  Dung Van Nguyen

Inventor： Eddie Kai Ho Ng ,  Ping Wai Wan ,  Derrick Remedios ,  Robert Michael Bierman ,  Dung Van Nguyen

IPC: H04B10/17 ,  H01S3/00

CPC classification number: H04B10/2942 ,  H04B10/2935

Abstract: An apparatus and method for minimizing channel gain excursion in an optical system with automatic gain control is provided. The apparatus includes a feedback control loop which dynamically regulates the target gain of an automatic gain controlled (AGC) amplifier so as to compensate for the action of the AGC amplifier to maintain a constant linear average gain without accounting for the distribution of channels that carry signals across the amplifier spectral gain profile, which causes gain excursion of individual channels. The feedback control loop measures gain of individual channels and uses these measurements to regulate the target gain of the amplifier so as to minimize gain excursion of individual channels. If required, the apparatus may be integrated into a package. In one embodiment, the method for regulating the target gain is to maintain constant gain for all channels irrespective of the number of channels that carry a signal. This method is simple and guarantees no gain excursion. In another embodiment, a weight is assigned to an individual channel to calculate a weighted average for the target gain of the amplifier while attempting to minimize gain excursion of individual channels.

Abstract translation: 提供一种用于使具有自动增益控制的光学系统中的通道增益偏移最小化的装置和方法。 该装置包括反馈控制回路，其动态地调节自动增益控制（AGC）放大器的目标增益，以便补偿AGC放大器的动作以维持恒定的线性平均增益，而不考虑携带信号的信道的分布 在放大器频谱增益曲线上，这导致单个通道的增益偏移。 反馈控制环路测量单个通道的增益，并使用这些测量来调节放大器的目标增益，以便最小化各个通道的增益偏移。 如果需要，该装置可以集成到包装中。 在一个实施例中，用于调节目标增益的方法是保持所有通道的恒定增益，而不管携带信号的通道数量如何。 这种方法很简单，保证没有增益偏移。 在另一个实施例中，将权重分配给单个信道以计算放大器的目标增益的加权平均值，同时尝试最小化各个信道的增益偏移。

公开(公告)号：US20050099419A1

公开(公告)日：2005-05-12

申请号：US10986347

申请日：2004-11-12

Applicant: Arthur Castonguay ,  John Groves

Inventor： Arthur Castonguay ,  John Groves

IPC: G06T17/00 ,  H04B10/08 ,  H04L12/24

CPC classification number: H04L41/0659 ,  H04L41/0631

Abstract: A method and system for fault isolation within a network element in an optical network is described. A single fault in the system can give rise to multiple alarms detected at multiple points. Finding the root cause alarm corresponding to the fault that has triggered these alarms is important for fault isolation and is the focus of attention for this invention. The network element is modeled by a directed acyclic graph that captures the interactions among various components in the network element. Using a graph-based technique the invention analyzes the various topological faults raised and their locations for identifying root cause alarms and masking all correlated alarms.

Abstract translation: 描述了光网络中网元内故障隔离的方法和系统。 系统中的单个故障可能会导致在多个点检测到多个报警。 寻找与触发这些报警的故障相对应的根本原因报警对于故障隔离很重要，是本发明的重点。 网络元素由捕获网络元件中各个组件之间的交互的有向无环图进行建模。 使用基于图形的技术，本发明分析了各种拓扑故障的发生及其位置，用于识别根本原因报警和屏蔽所有相关报警。

公开(公告)号：US07289734B2

公开(公告)日：2007-10-30

申请号：US10638378

申请日：2003-08-12

Applicant: Eddie Kai Ho Ng ,  Michael Joseph McCloskey

Inventor： Eddie Kai Ho Ng ,  Michael Joseph McCloskey

IPC: H04J14/08

CPC classification number: H04B10/077 ,  H04B10/07955 ,  H04J14/0221

Abstract: A method and system for multi-level power management in an optical network is provided. They include three levels of power equalization. The first level of power management equalizes the powers of channels in a band of channels. The second level of power management equalizes the average powers of bands of channels on a fiber. The third level of control equalizes the powers of bands of channels on working and protection fibers for a path in the optical network. As a result, this multi-level power management in the network provides a dynamic, automatic method for the network to adjust to changing operating conditions and configurations and to maintain relatively stable network powers. Each level of power management may be implemented jointly or independently, and operates autonomously so that, for example, one modification comprises continuous first level control and only periodic second level control.

Abstract translation: 提供了一种用于光网络中多级电源管理的方法和系统。 它们包括三级功率均衡。 电源管理的第一级使频道频道的功率相等。 功率管理的第二级别使光纤上的通道的平均功率相等。 第三级控制使光网络中的路径的工作和保护光纤上的信道频带的功率相等。 因此，网络中的这种多级电源管理为网络提供了一种动态的，自动的方法来适应不断变化的运行条件和配置，并保持相对稳定的网络功率。 每个级别的功率管理可以联合地或独立地实现，并且自主地操作，使得例如一个修改包括连续的第一级控制和仅周期性的第二级控制。

公开(公告)号：US07184660B2

公开(公告)日：2007-02-27

申请号：US10136407

申请日：2002-05-02

Applicant: Wen Liu ,  Paul David Obeda ,  Niranjan Vethanayagam ,  Dan Oprea

Inventor： Wen Liu ,  Paul David Obeda ,  Niranjan Vethanayagam ,  Dan Oprea

IPC: H04B10/08

CPC classification number: H04B10/00 ,  H04B2210/075 ,  H04J14/0227 ,  H04J14/0258 ,  H04J14/0264 ,  H04J14/0267 ,  H04J14/0276

Abstract: The invention describes methods and systems for monitoring the performance of an optical network by marking a group of optical signals with a set of identification tags which are unique to network characteristics. In the preferred embodiments, fiber identification (FID) and bundle identification (BID) tags are encoded into optical signals by marking an optical signal with low frequency dither tones whose frequencies are unique to the fiber section and to a bundle of fibers respectively. Detecting of the FID and BID tones provides more effective and accurate monitoring of performance of the optical network and allows determining of the network topology, e.g. paths of optical channels and traffic load through different fiber sections in the network. Other sets of hierarchically arranged identifiers encoded into optical signals have also been proposed, including band, conduit, city, region, country, etc. identifiers, as well as identifiers related to network security and service characteristics.

Abstract translation: 本发明描述了通过用网络特性唯一的一组识别标签标记一组光信号来监视光网络的性能的方法和系统。 在优选实施例中，光纤识别（FID）和束识别（BID）标签被编码为光信号，通过标记具有低频抖动音调的光信号，其频率分别对于纤维部分和纤维束是唯一的。 FID和BID音调的检测提供对光网络的性能的更有效和准确的监视，并且允许确定网络拓扑，例如， 光通道的路径和通过网络中不同光纤段的流量负载。 还提出了编码成光信号的其他层次排列的标识符集，包括带，导管，城市，区域，国家等标识符，以及与网络安全性和服务特性相关的标识符。

公开(公告)号：US07139480B2

公开(公告)日：2006-11-21

申请号：US10673790

申请日：2003-09-30

Applicant: Eddie Kai Ho Ng ,  Derrick Remedios ,  Colin Geoffrey Kelly ,  Ping Wai Wan ,  John Frederick Groves

Inventor： Eddie Kai Ho Ng ,  Derrick Remedios ,  Colin Geoffrey Kelly ,  Ping Wai Wan ,  John Frederick Groves

IPC: H04B10/08

CPC classification number: H04B10/077 ,  H04B10/07955

Abstract: A method and system for multi-level power management in an optical network is provided. They include three levels of power management. The first level of power management dynamically changes equipment settings in each module of equipment so that required module setpoint values in each module are achieved. The second level of power management determines module setpoint values for each module of equipment within each node in the optical link so that required node setpoint values are achieved. The third level of power management determines node setpoint values at each node in the optical link so that the optical link meets predetermined power specifications. If any of the three levels cannot achieve the required setpoint values, an error signal is generated by that level of power management and sent to the level of power management above it, thus initiating a higher level of power management. As a result, a dynamic and automatic adjustment to changing operating conditions and configurations in the network is provided, which allows to maintain relatively stable network powers. Each level of power management is implemented such that sections of the network can operate independent of each other, thus increasing the survivability of the network.

Abstract translation: 提供了一种用于光网络中多级电源管理的方法和系统。 它们包括三级电源管理。 第一级电源管理动态地更改设备的每个模块中的设备设置，从而实现每个模块中所需的模块设定值。 第二级电源管理确定光链路中每个节点内设备的每个模块的模块设定值，以便实现所需的节点设定值。 电源管理的第三级确定光链路中每个节点处的节点设定值，使得光链路满足预定的功率规格。 如果三个级别中的任何一个级别都不能达到要求的设定值，则通过该级别的功率管理生成错误信号并将其发送到其上方的电源管理级别，从而启动更高级别的电源管理。 结果，提供对网络中变化的操作条件和配置的动态和自动调整，这允许维持相对稳定的网络功率。 每个级别的电源管理被实现，使得网络的各部分可以彼此独立地操作，从而增加网络的生存性。

公开(公告)号：US07139069B2

公开(公告)日：2006-11-21

申请号：US11065098

申请日：2005-02-25

Applicant: James Benson Bacque ,  Ping Wai Wan ,  Derrick Remedios ,  Eddie Kai Ho Ng

Inventor： James Benson Bacque ,  Ping Wai Wan ,  Derrick Remedios ,  Eddie Kai Ho Ng

IPC: G01N21/00

CPC classification number: H04B10/077 ,  H04B10/07955

Abstract: A multi-stage method and apparatus for determining a faulty component location along an optical path through an optical fiber in an optical network are disclosed. A total power of the optical fiber, and a total wavelength power as a sum of powers of the individual wavelengths at a plurality of local detection points are measured and compared at the local detection points, followed by determining whether or not a faulty detection point exists along the optical path. If a fault is identified, the method provides a multi-stage fault detection procedure, including measuring a total wavelength power loss between a local detection point and an adjacent detection point, between the local detection point and multiple non-adjacent detection points, and a correlation of the measured total wavelength power losses between the various detection points. A corresponding apparatus for determining the faulty component location in the optical network is also provided.

Abstract translation: 公开了一种用于通过光网络中的光纤确定沿着光路的故障部件位置的多级方法和装置。 在本地检测点测量光纤的总功率和总波长功率作为多个本地检测点处的各个波长的功率之和，然后确定是否存在故障检测点 沿光路。 如果识别故障，则该方法提供多级故障检测程序，包括测量本地检测点与相邻检测点之间，本地检测点与多个非相邻检测点之间的总波长功率损耗，以及 在各种检测点之间测量的总波长功率损耗的相关性。 还提供了用于确定光网络中的故障组件位置的相应设备。

公开(公告)号：US06956824B2

公开(公告)日：2005-10-18

申请号：US09879939

申请日：2001-06-14

Applicant: Barry Ding Ken Mark ,  Walter Joseph Carpini

Inventor： Barry Ding Ken Mark ,  Walter Joseph Carpini

IPC: H04L12/24 ,  H04L12/28 ,  H04L12/413 ,  H04L12/44 ,  H04L12/56 ,  H04L12/26

CPC classification number: H04L45/00 ,  H04L12/2852 ,  H04L12/2856 ,  H04L12/2872 ,  H04L12/413 ,  H04L41/0677 ,  H04L45/245 ,  H04L45/28 ,  H04L2012/445 ,  Y02D50/30

Abstract: An extension of a Link Aggregation Protocol (LAP) over the network allows current Ethernet point-to-point LAPs to operate across a Metropolitan Area Network (MAN). A maximum disjoint path algorithm allows selection of a plurality of alternative end-to-end physical routes between two data terminals. These physical routes share a minimum number of nodes and physical links. End-to-end logical links are then formed by a plurality of successive physical links between nodes containing protocol compatible devices, the physical links being selected based on their physical characteristics such as bandwidth and delay. Multiple logical links can be provisioned, without dedicating, between any two data terminals over the network. The logical links provide the virtual point-to-point links that the edge LAP devices require. The extension of LAP/s over the network provides increased availability because a network failure can now be propagated to the edge of the network to allow the edge LAP devices to quickly react to the failure.

Abstract translation: 通过网络的链路聚合协议（LAP）的扩展允许当前的以太网点对点LAP在城域网（MAN）上运行。 最大不相交路径算法允许在两个数据终端之间选择多个备选的端到端物理路由。 这些物理路由共享最少数量的节点和物理链路。 然后，端到端逻辑链路由包含协议兼容设备的节点之间的多个连续的物理链路形成，物理链路根据其物理特性（例如带宽和延迟）来选择。 可以通过网络在任何两个数据终端之间配置多个逻辑链路，而无需专用。 逻辑链路提供边缘LAP设备所需的虚拟点对点链路。 LAP / s在网络上的扩展提供了更高的可用性，因为网络故障现在可以传播到网络的边缘，以允许边缘LAP设备快速响应故障。

公开(公告)号：US06931176B2

公开(公告)日：2005-08-16

申请号：US10636664

申请日：2003-08-08

Applicant: Colin Geoffrey Kelly

Inventor： Colin Geoffrey Kelly

IPC: H04J14/02 ,  G02B6/28 ,  H04B10/12

CPC classification number: H04J14/021 ,  H04J14/0205 ,  H04J14/0206

Abstract: Apparatuses and methods are provided for chromatic dispersion compensation of wavelength division multiplexed (WDM) optical signals within an optical add/drop multiplexer (OADM) and especially within a remotely reconfigurable add/drop multiplexer (RROADM). The arrangement is especially useful in metro or regional networks where RROADMs can be dynamically reconfigured to deliver signals from any node to any other node. A dispersion compensation module (DCM) is located in the multiplexed through path of the RROADM between the drop module and the add module such that only wavelengths passing through the RROADM are compensated and shorter optical paths traversing only one span between adjacent nodes are not compensated. This allows lower cost static DCMs to be used, allows more flexibility in DCM values and allows fewer DCMs to be used while maintaining dispersion limits.

Abstract translation: 提供了用于在光分插复用器（OADM）内，特别是在远程可重配置分插复用器（RROADM）内的波分复用（WDM）光信号的色散补偿的装置和方法。 这种安排在城域网或区域网络中特别有用，其中RROADM可以被动态地重新配置，以将信号从任何节点传递到任何其他节点。 色散补偿模块（DCM）位于落下模块和添加模块之间的RROADM的多路复用通路中，使得仅通过RROADM的波长被补偿，并且不补偿在相邻节点之间穿过仅一个跨距的较短光路。 这允许使用更低成本的静态DCM，允许DCM值更灵活，并允许使用更少的DCM，同时保持色散限制。

公开(公告)号：US06912340B2

公开(公告)日：2005-06-28

申请号：US10612908

申请日：2003-07-07

Applicant: James Benson Bacque

Inventor： James Benson Bacque

IPC: G02B6/34 ,  H04J14/02 ,  G02B6/28 ,  G02B6/293

CPC classification number: G02B6/29386 ,  G02B6/29317 ,  G02B6/29382 ,  G02B6/29395 ,  H04J14/02

Abstract: Optical interconnects and methods for wavelength management are provided to interconnect optical rings while overcoming color-blocking and allowing for wavelength re-use within optical rings. The optical inter-connects having a wavelength selective element such as a reconfigurable add/drop demultiplexer (ROADM) and a band-modulo demultiplexer having a free spectral range (FSR) combined with a pool of wavelength conversion resources. More flexible interconnect systems can use a photonic cross-connect (PXC) to allow sharing of a pool of wavelength conversion resources among several optical rings.

Abstract translation: 提供用于波长管理的光学互连和方法来互连光环，同时克服颜色阻挡并允许光环内的波长重新使用。 具有诸如可重配置分插复用器（ROADM）的波长选择元件和具有与波长转换资源池组合的自由光谱范围（FSR）的带模解复用器的光学互连。 更灵活的互连系统可以使用光子交叉连接（PXC）来允许在多个光环之间共享波长转换资源池。