Distributing clock synchronization information within an optical communications network
US8842994B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 22, 2012 |
| Grant date | Sep 23, 2014 |
| Priority date | — |
| Expiry date | Mar 16, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04J3/065
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A method and system of distributing clock synchronization information within an optical communications network including a plurality of network elements, in which a first network element receives an ingress clock synchronization message, the ingress clock synchronization message including a clock synchronization message identifier and a correction field. The first network element inserts the clock synchronization message identifier into an optical channel frame overhead and inserts the ingress clock synchronization message into an optical channel frame payload. The first network element transmits the optical channel frame overhead and the optical channel frame payload to a second network element, and determines a transit time of the clock synchronization message identifier across each of the network elements. The second network element updates the correction field of the ingress clock synchronization message with said transit times to form an egress clock synchronization message.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.