Patent ID: 7564780
Filing Date: 2009-07-21
Classification: H04L

Abstract:
1. A method for a network node to provision protection paths comprising: determining network configuration information for a network formed by a plurality of nodes, wherein the network configuration information comprises topological information and timing information, wherein the topological information describes the interconnections between the nodes in the network, and wherein the timing information includes data regarding response times for the nodes in the network; identifying a working path from a source node to a destination node spanning one or more intermediate nodes, wherein the source node, the destination node, and the intermediate nodes are all nodes in the network; determining a timing constraint for failure recovery; identifying potential nodes in the network that satisfy the timing constraint based on the network configuration information; selecting a protection path from the source node to the destination node spanning a second set of one or more intermediate nodes, the second intermediate nodes selected from the potential nodes; and setting up the protection path by notifying the second intermediate nodes to set up the protection path wherein the steps of determining network configuration information, identifying the working path, determining the timing constraint, identifying potential nodes in the network, selecting the protection path, and setting up the protection path are performed by the network node.