Patent ID: 8855483
Filing Date: 2014-10-07
Classification: H04J,H04Q

Abstract:
1. A method of restoration for an optical network, the network comprising a plurality of nodes interconnected with each other by optical links, a subset of the nodes each comprising a regenerator, the method comprising: storing a quality of transmission parameter and a regenerator availability at each of the plurality of nodes; notifying a branch node in response to detecting a failure within a link forming part of the path between a source node and a destination node, wherein the branch node is the neighbouring upstream node upstream of the link failure, the branch node having a regenerator; the branch node computing a restoration segment to a merge node having a regenerator which is a neighbouring downstream node which is downstream of the link failure, the restoration segment being based on the quality of transmission parameter and regenerator availability information; restoring the path between the source node and the destination node using the restoration segment.