Asymmetry correction for precise clock synchronization over optical fiber
US9160473B2 · kind B2 · utility
2Cited by
2References
20Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 13, 2013 |
| Grant date | Oct 13, 2015 |
| Priority date | — |
| Expiry date | Aug 22, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04J3/0667
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A clock at a first network element that is connected to a second network element over an optical fiber link is aligned in time/phase using packet protocols such as PTP. The invention discloses how to correct the asymmetry error inherent in traditional packet-based time-transfer methods.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.