Protection switching in WDM rings using a shared ring switch
US8417112B2 · kind B2 · utility
0Cited by
11References
16Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 30, 2003 |
| Grant date | Apr 9, 2013 |
| Priority date | — |
| Expiry date | Aug 17, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04Q2011/0092
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A switching method is provided having improved accuracy in monitoring a network to determine when to switch. The method collects and stores a plurality of bit error rate (BER) values. The BER values are analyzed using a BER hysterisis algorithm to check BER degradation. Thereafter, the method switches a transmission port when the degradation exceeds a predetermined BER threshold level for a predetermined period of time. In another embodiment, a feature which transmits a switch polling signal for a predetermined duration is used with the above switching method.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.