Constraint-based shortest path first method for dynamically switched optical transport networks
US7324453B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 16, 2002 |
| Grant date | Jan 29, 2008 |
| Priority date | — |
| Expiry date | Oct 21, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L45/22
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
Method and apparatus for implementing a constraint-based shortest path first (“CSPF”) technique for dynamically switched optical transport networks are described. One embodiment comprises a traffic network element (“TNE”) in a network comprising a traffic engineering network database (“TEND”) that stores network topology information for the network and bandwidth availability information for links in the network; and a routing engine that receives a request for a label switched path (“LSP”) with specified constraints, processes network topology information from the TEND to create a network graph comprising links meeting the specified constraints, and computes a primary path through the network, wherein the primary path comprises links selected from the network graph.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.