Whole fiber switched p-cycles
US9225460B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 25, 2011 |
| Grant date | Dec 29, 2015 |
| Priority date | — |
| Expiry date | Sep 6, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04J14/0213
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A communication network in which p-cycles are used to rapidly, simply and efficiently provide for the direct replacement of failed fiber sections with whole replacement fibers. As long as the loss budgets are adequate, entire DWDM wavebands can be restored with no switching or manipulation of individual lightpaths. Following a substitution transient, the DWDM layer would never know the break happened. In environments where fiber switching devices are low cost, and ducts are full of dark fiber, this could provide a very low cost alternative to protect an entire DWDM transport layer (or working capacity envelope) against the single largest cause of outage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.