Method for wavelength switch network restoration
US7035537B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 29, 2001 |
| Grant date | Apr 25, 2006 |
| Priority date | — |
| Expiry date | Aug 20, 2023 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04Q2011/0086
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A fiberoptic network with an optical supervisory channel in each of the optical fibers interconnecting the nodes of the network is described. Together with IP routers, the optical supervisory channels form a control network over which signaling and control signals are exchanged by which provisioning and restoration operations are performed at each node. To restore connections between the nodes upon a failure of the network, the control network helps to maintain at each node a synchronized database of network connections between the nodes, send messages to other nodes to initiate restoration operations by a node noticing the failure; and recalculate network connections around the failure by each node from a synchronized database at the node.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.