Distributed preconfiguration of spare capacity in closed paths for network restoration
US6421349B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 11, 1997 |
| Grant date | Jul 16, 2002 |
| Priority date | — |
| Expiry date | Jul 11, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04Q3/0079
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A Method for restoring traffic in a network. The network includes plural distinct nodes interconnected by plural distinct spans, each span having working links and spare links. Each node has a digital cross-connect switch for making and breaking connections between adjacent spans forming span pairs at a node. Cross-connections between spare links in adjacent spans are made such that sets of successive nodes through which the adjacent spans form span paths form closed paths. A method of finding and construction closed paths is described in which statelets are broadcast through the network. In a preferred method of implementation of the method, the statelet broadcast occurs not in response to a network failure, but across the entire network before any particular span failure and may be carried out during normal network operations as a continual re-configuration of the network.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.