Patent ID: 7352703
Filing Date: 2008-04-01
Classification: H04L

Abstract:
1. A method for providing protection in a communications network including a plurality of nodes coupled by communication links, comprising: responsive to a connection request received by an ingress node, computing a working path between said ingress node and an egress node; monitoring a quality of the nodes and the communication links; detecting a first quality degradation event indicative of a failure prediction of one of the nodes or one of the communications links; responsive to detecting the first quality degradation event, monitoring at least one of a temporal or spatial correlation of further possible quality degradation events with respect to the detected first quality degradation event to be able to detect a second quality degradation event indicative of another failure prediction of another one of the nodes or another one of the communication links; and responsive to detecting the second quality degradation event, computing a plurality of backup paths between said ingress and egress nodes where the nodes and/or the communication links associated with the first and second quality degradation events are not used in a same backup path.