Path restoration of networks
US6377543B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 20, 1997 |
| Grant date | Apr 23, 2002 |
| Priority date | — |
| Expiry date | Oct 20, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L41/0659
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A distributed method for creating telecommunications paths in a network, particularly after a span failure. 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. At least one of the end nodes of a path to be created broadcasts statelets. Each intermediate node between the end nodes broadcasts incoming statelets in a manner that favours use of restoration paths that eliminate the fewest other paths. Statelets that have traversed spans with greater spare capacity, considering the number of statelets competing to be broadcast along the spans, are preferentially broadcast.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.