公开(公告)号：US20040221058A1

公开(公告)日：2004-11-04

申请号：US10364622

申请日：2003-02-12

Applicant: NORTEL NETWORKS LIMITED

Inventor： Evert E. de Boer ,  Jeanpierre Coupal ,  Richard Trudel ,  Guy Boutin ,  Mohamed El-Torky

IPC: G06F015/173

CPC classification number: H04L1/22 ,  H04J3/085 ,  H04J14/0284 ,  H04J14/0287 ,  H04J14/0291 ,  H04J14/0295 ,  H04J2203/006

Abstract: In a mesh connected communications network, nested link protection for a working link between two nodes across the network is provided. In the event of a fault on the working link between the two nodes, traffic on the link may be switched to a single parallel link between the two nodes, thereby restoring traffic on the link. Additionally, a link protection path extending between the two nodes is provisioned by way of at least one intermediate node. In the event the parallel protection link is not available, traffic carried on the working link may be switched to the link protection path, restoring traffic to the second node by way of the intermediate node. Conveniently, link protection path switching may be used in the event the parallel protection link is not available or at the choice of an operator.

Abstract translation: 在网状连接的通信网络中，提供了跨网络的两个节点之间的工作链路的嵌套链路保护。 在两个节点之间的工作链路发生故障的情况下，链路上的流量可以切换到两个节点之间的单个并行链路，从而恢复链路上的流量。 另外，通过至少一个中间节点提供在两个节点之间延伸的链路保护路径。 在并行保护链路不可用的情况下，工作链路上携带的流量可以切换到链路保护路径，通过中间节点恢复到第二个节点的流量。 方便地，在并行保护链路不可用或在操作者的选择的情况下，可以使用链路保护路径切换。