Optical path cross-connect and optical wavelength multiplexing diversity communication system using the same
US7242861B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 19, 2001 |
| Grant date | Jul 10, 2007 |
| Priority date | — |
| Expiry date | May 29, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04J14/0295
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A protection system protects paths of internetwork communication between WDM ring networks, and includes a plurality of optical wavelength multiplexing networks having a plurality of nodes and a network management system for monitoring conditions of the plurality of nodes. The nodes include a first node having add/drop functions of adding/dropping wavelength-multiplexed optical signals; a second node having a signal transfer function as well as the add/drop functions; and a third node having an internetwork connection function between the networks. Each first, second and third nodes further includes optical path cross-connect switches and a table for indicating conditions of the optical path cross-connect switches and a detected node fault condition. The network management system controls to set the optical path cross-connect switches in the first, second and third nodes so that the optimal optical path connection may be obtained according to the detected node fault condition indicated in the node tables.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.