Focused link state advertisements
US7042850B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 9, 2001 |
| Grant date | May 9, 2006 |
| Priority date | — |
| Expiry date | Feb 24, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L45/03
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A network router generates node state advertisements identifying network links about which the router node desires to receive link state information. The node state advertisements are flooded to other routers, each of which determines whether it lies along the shortest path between the link and the originating router. Each router that lies along the shortest path maintains an association between the link and the originating router, the association indicating that link state advertisements concerning the link are to be forwarded along the path toward the originating router. Upon a change of the state of the link, each router forwards a corresponding link state advertisement to an adjacent node along the path, whereby the originating router ultimately receives the link-state advertisement.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.