Method and system for shared protection in wavelength division multiplexing loop network
US8600229B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 15, 2009 |
| Grant date | Dec 3, 2013 |
| Priority date | — |
| Expiry date | Apr 28, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04J14/0297
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
The present invention discloses a method and a system for shared protection in WDM loop network. The WDM loop network comprises at least one node, and each node is divided into a multiplexing segment layer, a channel layer and a sub-wavelength layer. The method for shared protection comprises the following steps: A, the multiplexing segment layer, the channel layer and the sub-wavelength layer of each node are detected respectively; B, the detection point generates fault information when at least one of the multiplexing segment layer, the channel layer and the sub-wavelength layer goes wrong; and a controller of each node, according to the fault information, determines the protection control state of the present node and notifies the respective executor; wherein the protection control state includes service adding, service passing through, and service dropping; C, the executor of each node controls the corresponding node to switch to the protection control state determined in step B. The present invention realizes the shared protection in sub-wavelength level.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.