Patent ID: 7035537
Filing Date: 2006-04-25
Classification: H04J,H04Q

Abstract:
1. In an optical network having a plurality of interconnected nodes, each node capable of selectively switching optical signals in a first wavelength channel and an input fiber and to any one of a plurality of wavelength channels and output fibers, a method of restoring connection between said nodes upon a failure of said network, said method comprising maintaining at each of said nodes a synchronized database of network connections between said nodes; wherein said synchronized database maintaining step comprises accepting results of said recalculating network connections at all of said interconnected nodes of said optical network if all nodes complete said recalculation network connections step successfully; and rejecting said results of said recalculation steps at all of said interconnected nodes of said optical network if one or more nodes do not complete said recalculation network connections step successfully; sending messages to other nodes to initiate restoration operations by a node noticing said failure; and recalculating network connections around said failure by each node from a synchronized database at said node wherein said recalculating network connections step is performed independently by each node.