公开(公告)号：US06915463B2

公开(公告)日：2005-07-05

申请号：US10025868

申请日：2001-12-26

申请人： Richard Charles Vieregge ,  Hans Frederick Johnsen ,  Walter Joseph Carpini ,  Victoria Donnelly

发明人： Richard Charles Vieregge ,  Hans Frederick Johnsen ,  Walter Joseph Carpini ,  Victoria Donnelly

IPC分类号： H04L1/22 ,  H04L12/701 ,  H04L12/703 ,  H04L29/14 ,  H04B17/00 ,  H04B1/74

CPC分类号： H04J14/0294 ,  H04J14/0283 ,  H04J14/0295 ,  H04L1/22 ,  H04L45/00 ,  H04L45/28 ,  H04L69/40

摘要： Methods and network nodes are provided which are adapted to perform protection switching on the basis of raw signal quality information, such as raw BER information, in a manner which instigates the protection switching before an actual failure has occurred. In some embodiments, these methods leverage forward error correction and uncorrected BER to effect traffic redirection before faults are observed at layer 2 and above. This is as opposed to the method of switching layer 2 traffic in response to bitstream characteristics observed at that layer.

摘要翻译： 提供方法和网络节点，其适于基于原始信号质量信息（例如原始BER信息）以在实际故障发生之前激发保护倒换的方式执行保护切换。 在一些实施例中，这些方法利用前向纠错和未校正的BER来在层2及以上观察到故障之前实现业务重定向。 这与根据在该层观察到的比特流特性来切换层2业务的方法相反。

公开(公告)号：US06785737B2

公开(公告)日：2004-08-31

申请号：US09917669

申请日：2001-07-31

申请人： Byoung-Joon Lee ,  Hans Frederick Johnsen ,  Richard Charles Vieregge

发明人： Byoung-Joon Lee ,  Hans Frederick Johnsen ,  Richard Charles Vieregge

IPC分类号： G06F15173

CPC分类号： H04L45/123 ,  H04L45/02 ,  H04L45/12

摘要： Methods and components are provided which ensure both the improved use of network resources and adequate performance of best effort (BE) traffic by intelligently distributing the BE traffic demands at connection level with corresponding scaling weights, and without reserving bandwidth. A weighted sum of the best effort (BE) class connections (or LSPs in MPLS context) in a link is used as a path selection criterion, where each BE connection is weighted by its service volume. Path selection for a requested BE service volume is performed by creating a virtual topology in which all links in a network have weighted BE metrics updated to include the effects of the requested BE service volume, and identifying a best path through the virtual topology taking into account the weighted BE metrics.

摘要翻译： 提供了方法和组件，其通过在具有相应的缩放权重的连接级别智能地分发BE业务需求并且不预留带宽来确保网络资源的改进使用和充分的尽力而为（BE）业务的性能。 使用链路中尽力（BE）类连接（或MPLS上下文中的LSP）的加权和作为路径选择标准，其中每个BE连接由其服务量加权。 通过创建虚拟拓扑来执行所请求的BE服务卷的路径选择，其中网络中的所有链路具有加权的BE度量，其被更新为包括所请求的BE服务量的效果，并且通过考虑虚拟拓扑来识别最佳路径 加权BE指标。

公开(公告)号：US07127508B2

公开(公告)日：2006-10-24

申请号：US10134553

申请日：2002-04-30

申请人： Kelvin Ross Edmison ,  Hans Frederick Johnsen ,  Walter Joseph Carpini

发明人： Kelvin Ross Edmison ,  Hans Frederick Johnsen ,  Walter Joseph Carpini

IPC分类号： G06F13/00

CPC分类号： H04L47/283 ,  H04L1/20 ,  H04L41/5003 ,  H04L41/5038 ,  H04L43/50 ,  H04L47/10 ,  H04L47/115

摘要： The invention provides a method which involves inserting probe packets on a per service basis for transmission on a respective round trip; and for each service using the probe packets to calculate packet latency for probe packets which is representative of packet latency for all packets transmitted for the service. In some embodiments, data plane time stamps are used to accurately time probe latency. The invention also provides a method which involves inserting probe packets on a per service basis for transmission on a respective destination network element; and at the destination network element for a given service using the probe packets to calculate one way packet loss for the service.

摘要翻译： 本发明提供了一种方法，其涉及在每个服务基础上插入探测分组以在相应的往返中传输; 并且对于使用探测分组的每个服务来计算探测分组的分组等待时间，其代表为服务发送的所有分组的分组等待时间。 在一些实施例中，数据平面时间戳用于准确地测量探测延迟。 本发明还提供了一种方法，其涉及在每个服务基础上插入探测分组以在相应的目的地网络单元上传输; 并且使用探测分组在给定服务的目的地网元处计算该服务的单向分组丢失。