Protection systems and methods for handling multiple faults and isolated nodes in interconnected ring networks
US9197493B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 6, 2012 |
| Grant date | Nov 24, 2015 |
| Priority date | — |
| Expiry date | Mar 20, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L69/40
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
The present disclosure provides protection systems and methods that provide a mechanism to identify/determine when an interconnection node has been isolated (i.e. when there is no connectivity between a pair of interconnection nodes), from a data path perspective. If/when this condition exists, actions are triggered on the subtending sub-ring that essentially perform a protection switch (which causes the subtending sub-ring nodes to cleanse their forwarding tables), and, more importantly, that remove any channel blocks on the subtending sub-ring. Extensions to the ITU-T G.8032 state machine are also provided that include support for operator command interactions (e.g. DNR, force switch, manual switch, etc.). The protection systems and methods of the present disclosure enable the reliable application of ITU-T G.8032 and the like to more complex (i.e. meshed) deployment environments, among other significant advantages.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.