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1. 发明授权

US07489642B2 Silent datapath failure detection 有权
标题翻译：静音数据路径故障检测
公开(公告)号：US07489642B2
公开(公告)日：2009-02-10
申请号：US10834129
申请日：2004-04-29
申请人： Desmond Glenn Smith , Terrence Vincent Sellars , Stephen Michael Shortt , David Henry Graham , Christopher Edward Trader , Myles Kevin Dear , Thomas Man Chun Kam
发明人： Desmond Glenn Smith , Terrence Vincent Sellars , Stephen Michael Shortt , David Henry Graham , Christopher Edward Trader , Myles Kevin Dear , Thomas Man Chun Kam
IPC分类号： H04L12/26
CPC分类号： H04L41/0659 , H04L41/0681 , H04L43/16
摘要： The apparatus and method herein provide a means for actively monitoring a communications node for datapath disruptions caused within the node. It was developed to address linecard failures that were detected in the field and for which traditional error detection mechanisms such as CRC and OAM CC checks are not feasible. According to one implementation, statistics are collected over a preset time interval. If any egress cell counts are zero over a full interval, then the ingress interface for that datapath is determined, e.g. using the node's cross-datapath information, and the corresponding linecard of that ingress interface is contacted to determine the ingress cell count. If the ingress cell count is non-zero then the datapath is alarmed since the complete lack of cells transmitted at the egress indicates a datapath disruption. Other implementations that can detect datapath disruptions without a complete interval of statistics collection and which do not require a zero egress cell count are possible for cases where congestion, linecard resets, etc. can be ruled out.
摘要翻译：本文的装置和方法提供了用于主动监视通信节点以在节点内引起的数据路由中断的手段。它被开发用于解决在现场检测到的线卡故障，并且传统的错误检测机制如CRC和OAM CC检查是不可行的。根据一个实施方式，在预设的时间间隔内收集统计数据。如果任何出口单元在整个间隔内为零，则确定该数据路径的入口接口，例如，使用节点的跨数据路径信息，并接触该入口接口的相应线卡，以确定入口单元数。如果入口单元计数不为零，则数据通路将被警告，因为在出口处完全缺少单元格指示数据路径中断。可以排除拥塞，线卡复位等情况的其他可以在没有完整的统计信息收集间隔并且不需要零出口单元数的情况下检测数据路径中断的实现。

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