Network system of recovering routing information
US7969865B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | May 23, 2007 |
| Grant date | Jun 28, 2011 |
| Priority date | — |
| Expiry date | Dec 30, 2028 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04Q2011/0081
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
When protection processing is applied after a fault in the optical switching unit while the path control unit is restarting. In network systems comprising a path control unit for setting the paths, and a data transmission unit coupled to the path control unit; the data transmission unit changes the path information, stores path information before and after the fault was detected, and transmits the path information from before or after fault detection to the path control unit, and decides either of the transmitted path information based on an internal status; and the path control unit stores the path information sent from the data transmission unit, and after restarting, receives path information from the data transmission unit and, acquires path information stored in the path control units controlled by the adjacently connected data transmission units and is restored to operation with path information from before restarting.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.