Wavelength routing in a photonic network
US6757494B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 22, 2000 |
| Grant date | Jun 29, 2004 |
| Priority date | — |
| Expiry date | Sep 30, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04Q2011/0073
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
In a photonic network, signals are degraded by passing through amplifiers. A maximum number of amplifiers may be traversed before regeneration is necessary. Regeneration (typically carried out in an optical cross-connect) involves relatively expensive hardware and is to be avoided if possible. An algorithm is set out which operates in two stages. In a first stage untenable paths are rejected and in a second stage the shortest path analyzes are carried out which maximizes the number of amplifiers interspersed between regenerative nodes thereby to minimize the use of regenerative nodes but ensures that all paths have regenerative nodes spaced at no more than a maximum interval of non-regenerative nodes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.