Restoration scheme for an optical network and method of using such a scheme
US8855483B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 19, 2008 |
| Grant date | Oct 7, 2014 |
| Priority date | — |
| Expiry date | Nov 10, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04Q2011/0086
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A method of restoration for an optical network, the network comprising a plurality of nodes (40, 50) interconnected with each other by optical links (130), a subset of the nodes (40) each comprising a regenerator, the method comprising: storing 160) a quality of transmission parameter and a regenerator availability at each of the plurality of nodes (40, 50); notifying (170) a branch node (110) in response to detecting a failure (140) within a link (130) forming part of the path between a source node (20) and a destination node (30), wherein the branch node (110) is the neighbouring upstream node (40, 50) upstream of the link failure (140), the branch node (110) having a regenerator; the branch node (110) computing (190) a restoration segment (100) to a merge node (120) having a regenerator which is a neighbouring downstream node which is downstream of the link failure (140), the restoration path (100) being based on the quality of transmission parameter and regenerator availability information; restoring (180) the path between the source node (20) and the destination node (30) using the restoration segment (100).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.