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1. 发明申请

US20060034608A1 Method and system for providing a signature signal in an optical network in the event of loss of a client 失效
标题翻译：在客户端丢失的情况下，在光网络中提供签名信号的方法和系统
公开(公告)号：US20060034608A1
公开(公告)日：2006-02-16
申请号：US11184966
申请日：2005-07-20
申请人： David Holmes , Paul Reepschlager
发明人： David Holmes , Paul Reepschlager
IPC分类号： G02F1/00
CPC分类号： H04B10/00 , H04L41/06
摘要： An optical network including multiple nodes is subject to intermittent faults that may raise alarms in the system. The invention focuses on an optical network based on the Any rate architecture. A single fault such as a client failure at a node in such a network can give rise to a loss of client signal leading to multiple alarms detected at multiple points. To alleviate this problem this invention provides switching in a special Signature signal in place of the lost client signal. By detecting the Signature signal containing a specific code, the fault on the any rate-based architecture can be uniquely identified. In addition to fault identification, the Signature signal on the network makes it possible to maintain Clock and Data Recovery Locks at downstream nodes. The Signature signal serves also as a vehicle for carrying a special optical tag called Wavekey provided by the Wavelength Tracker technology developed by the Applicant. This optical tag includes a low frequency modulation of one or more dither tones onto an optical channel, which is uniquely identified by the tag. Maintaining the Wavekey is important for tracing the end-to-end path and power level of the signal on each wavelength. A method and a Field Programmable Gate Array-based system for the generation and identification of such a Signature signal that not only identifies the fault that has occurred on the optical network but also provides for the maintenance of the Wavekey, are described.
摘要翻译：包括多个节点的光网络经受间歇性故障，可能会引起系统中的报警。本发明专注于基于Any Rate架构的光网络。诸如这种网络中的节点处的客户端故障的单个故障可能导致客户端信号的丢失，导致在多个点处检测到的多个警报。为了减轻这个问题，本发明提供了一种特殊的Signature信号来代替丢失的客户端信号。通过检测包含特定代码的签名信号，可以唯一地识别任何基于速率的架构上的故障。除了故障识别之外，网络上的Signature信号还可以在下游节点保持Clock和Data Recovery Lock。签名信号还用作携带由本申请人开发的波长跟踪技术提供的称为Wavekey的特殊光学标签的载体。该光学标签包括一个或多个抖动音调到光信道上的低频调制，其由标签唯一地标识。维护Wavekey对于跟踪每个波长上的信号的端到端路径和功率电平非常重要。描述了一种用于生成和识别这样的签名信号的方法和基于现场可编程门阵列的系统，其不仅识别出在光网络上发生的故障，而且提供波形的维护。

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