Optical cross-connect restoration technique
US6278689A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 22, 1998 |
| Grant date | Aug 21, 2001 |
| Priority date | — |
| Expiry date | Apr 22, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04Q2011/0092
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
An alarm and restoration system (28) accomplishes restoration in a ring network (10.sub.l) by monitoring network traffic to detect the occurrence of a single failure arising from a failed optical service path (14.sub.i) and the occurrence of a double failure arising from a failed optical service path and an occupied optical protection path (16.sub.i). In case of a single failure, the alarm and restoration system (28) restores traffic in the network itself by routing traffic on a restoration path. In the even of a double failure, the alarm and restoration system (28) routes traffic from the failed ring network through an Optical Cross-Connect mesh (22) to transform the double failure into a single failure that can be restored in the network itself.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.