公开(公告)号：US20010032271A1

公开(公告)日：2001-10-18

申请号：US09748391

申请日：2000-12-27

Applicant: NORTEL NETWORKS LIMITED

Inventor： David Ian Allen

IPC: G06F015/173

CPC classification number: H04L45/28 ,  H04L45/00 ,  H04L45/22 ,  H04L45/50 ,  H04L2012/562 ,  H04L2012/5627 ,  H04L2012/563 ,  H04Q11/0478

Abstract: A method, device and software for ensuring path diversity across a communications network are disclosed. The method forms a digest of resources used in an initial, working, path is created as the initial path is established. This digest may be used during the formation of a subsequent, protection, path. Each node along the subsequent path can use the digest to ensure that resources are not common to the initial and subsequent paths. Conveniently, the digest may take the form of a Bloom filter that summarizes local information about resources known to each node along the initial path. The method lends itself for use in an MPLS compliant network or any connection oriented network such as an ATM, SONET or switched optical network.

Abstract translation: 公开了一种用于确保通信网络上的路径分集的方法，设备和软件。 该方法形成初始，工作，路径中使用的资源的摘要，因为初始路径已建立。 这个摘要可以在形成后续保护路径时使用。 沿着后续路径的每个节点都可以使用摘要来确保资源对初始路径和后续路径不常见。 方便地，摘要可以采用布鲁姆滤波器的形式，其汇总关于沿着初始路径的每个节点已知的资源的本地信息。 该方法适用于MPLS兼容网络或任何面向连接的网络，如ATM，SONET或交换光网络。