Distributing clock synchronization information within an optical communications network
US9628259B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 17, 2012 |
| Grant date | Apr 18, 2017 |
| Priority date | — |
| Expiry date | Jan 1, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04J3/1652
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A method distributes clock synchronization information within an optical communications network having a plurality of network elements. The method receives an ingress clock synchronization message at a first network element. The ingress clock synchronization message includes a clock synchronization message identifier and a correction field. The clock synchronization message identifier is inserted into an optical channel frame overhead and the ingress clock synchronization message is inserted into an optical channel frame payload. The optical channel frame overhead and the optical channel frame payload are transmitted across the first network element, across the network to a second network element, and across the second network element. A transit time of the clock synchronization message identifier is determined across each of the network elements. At the second network element, the correction field of the ingress clock synchronization message is updated with the transit times to form an egress clock synchronization message.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.