Method and system for bi-directional path switched network
US7046619B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 6, 2001 |
| Grant date | May 16, 2006 |
| Priority date | — |
| Expiry date | Mar 9, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04J2203/006
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A system for use in a bi-directional path switched ring network for detecting a failed optical path and establishing a protection path so as to allow signals from the failed optical path to be re-routed via the protection path is provided. According to one aspect of the system, upon detecting a failure relating to an optical path, the destination node generates a connection request message for transmission to the source node. The connection request message is passed to the source node via one or more intermediate nodes, if any. Each intermediate node examines the connection request message accordingly reserves the requisite wavelength from the protection capacity so as to allow signals from the failed optical path to be re-routed. Upon receiving the connection request message, the source node readies its switching equipment to re-route signals from the failed optical path and generates an acknowledgment message and propagates it back to the destination node via the intermediate nodes. The intermediate nodes and the destination node, upon receipt of the acknowledgement message, also ready their respective switching equipment to carry the re-routed signals via the previously reserved…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.