Clock distribution in a communications network
US6775300B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | May 9, 2003 |
| Grant date | Aug 10, 2004 |
| Priority date | — |
| Expiry date | May 9, 2023 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04J3/0685
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
Clock information related to a reference clock is distributed from a master network node to a slave network node in an asynchronous packet-based network by embedding the clock information into an additional bit stream and multiplexing the additional bit stream with a primary data stream using an out-of-band channel. Multiplexing the additional bit stream with the primary bit stream using an out-of-band channel may involve selecting yB codes of an xB/yB encoded bit stream to represent bits of the additional bit stream or to balance the running disparity of the xB/yB encoded bit stream. The clock information that is embedded into the additional bit stream is used to generate a clock that is synchronized with a reference clock. In an embodiment, the clock information represents the time difference between a transmitted frame of the additional bit stream and a next edge of the reference clock.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.