Patent ID: 6222821
Filing Date: 2001-04-24
Classification: H04L,H04Q

Abstract:
In a telecommunications network having a plurality of nodes interconnected by a plurality of working and spare links, after functionality of at least one failed working link is restored by a distributed restoration scheme, a method of automatically reconfiguring said network to the topology it had before said one working link failed, comprising the steps of:(a) identifying each of the nodes having performed two cross-connect operations for rerouting traffic traveling on a route including said one failed working link to an alternate route as custodial nodes bracketing said one failed working link;(b) identifying at least one node to which respective connections via corresponding spare links were made by said custodial nodes to establish said alternate route when said one working link failed as a tandem node;(c) identifying in each of said custodial nodes the port to which one end of said failed working link is connected, the port to which one of said respective spare links to said tandem node is coupled, and the port through which traffic on said route is routed to other nodes of said network; and(d) disconnecting said traffic routed through port from said spare link coupled port and cross-connecting said traffic routed through port to said failed working link connected port in each of said custodial nodes.