Multiple endpoint protection using SPVCs
US7590053B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 21, 2005 |
| Grant date | Sep 15, 2009 |
| Priority date | — |
| Expiry date | Mar 29, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2012/5627
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A system and method are provided for a multi-endpoint SPVC, the multi-endpoint SPVC providing redundancy. A primary SPVC is established through a first source node. An intermate communication channel (ICC) is established between the first source node and a second source node. If the primary SPVC fails, the second source node learns of this via the ICC and establishes an alternate SPVC. If the first source node fails, the second source node learns of this failure without having to be explicitly told. The second source node learns of the failure of the first source node when poll messages are no longer received over the ICC as indicated by expiry of a timer. In such an event, the second source node attempts to establish an alternate SPVC. Finite state machines are provided on each source node to monitor the status of each other. Command messages, in the form of Generic Application Transport information elements, are provided by which the finite state machines can communicate over the ICC.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.