Apparatus and method for protection switching in a network
US8018838B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 25, 2003 |
| Grant date | Sep 13, 2011 |
| Priority date | — |
| Expiry date | Dec 29, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2001/0092
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A system supports 50 ms protection switching times independent of network architecture. The system includes multiple protection switch fabrics to perform facility protection switching for the signals and a central switch fabric to switch a subset of the signals in a non-facility protection switching manner among the protection switch fabrics. Linear and ring network configurations are supported by the system. The system has flexibility to perform Linear Automatic Protection Switching (LAPS), Unidirection Path Switched Ring (UPSR) protection switching, and Bidirectional Line Switched Ring (BLSR) protection switching without burdening the central switch fabric with unnecessary or redundant traffic.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.