Patent ID: 6295275
Filing Date: 2001-09-25
Classification: H04Q

Abstract:
In a telecommunications network having nodes interconnected by connections and a computing resource for directing restoration of the network from a failure, a method comprising the steps of:with the computing resource, generating restoral sub-routes, wherein each restoral sub-route is a portion of the network having nodes, including end nodes that constitute respective ends of the sub-route, and connections that connect nodes, and wherein each restoral sub-route has an associated cost less than a threshold cost;identifying a failure in the network and identifying a failure span that is impacted by the failure, said failure span including nodes wherein said nodes are logically divisible into nodes positioned on a first side of the failure and nodes positioned on a second side of the failure;identifying selected ones of the sub-routes that have a selected end node that is one of the nodes of the failure span that is impacted by the failure, said selected end node being positioned on the first side of the failure;identifying given ones of the sub-routes that have a given end node that is one of the nodes of the failure span that is impacted by the failure, said given end node being positioned on the second side of the failure; andemploying one of the selected sub-routes and one of the given sub-routes to create a restoral route for restoring the telecommunications network from the failure.