Protection method and system for preplanning duality of paths for a unicast and/or a multicast traffic
US9246795B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 11, 2011 |
| Grant date | Jan 26, 2016 |
| Priority date | — |
| Expiry date | Sep 16, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L45/18
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
The present invention relates to a protection method based on preplanning duality of paths for a unicast and/or a multicast traffic, by extending a network into hierarchy of connected rings to form a hierarchical ring based tree (HRBT) structure. The present method enables a deterministic method to route a frame (or packet) when a primary path to destination is unavailable due to node/link failure, bandwidth crunch, mis-configuration, etc. If both primary and secondary (or alternate) path are pre-provisioned before traffic is allowed, the switch-over time from primary (P) path to secondary (S) path will be minimized, thus enabling 50 ms protection switching in packet network.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.