Method and arrangement for failure handling in a network
US7965621B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 14, 2005 |
| Grant date | Jun 21, 2011 |
| Priority date | — |
| Expiry date | Dec 19, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L41/0213
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A method and arrangement for failure handling in a tree-structured communications network having interconnected edge nodes and switching nodes. VLANs may be established by using spanning trees to provide connectivity in case of a failure in the network. Emitters in the edge nodes periodically broadcast alive messages on the VLANs, and notifiers note the alive messages. A missing alive message indicates a failure on one of the VLANs, and the notifier broadcasts corresponding failure messages on the VLANs. When the alive messages are restored, the notifier broadcasts corresponding repair messages. If a notifier fails to note a failure, one of the edge nodes performs a similar function although somewhat slower.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.