Methods and apparatus for timing synchronization in packet networks
US7711009B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 29, 2006 |
| Grant date | May 4, 2010 |
| Priority date | — |
| Expiry date | Nov 11, 2028 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03L2207/50
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
Methods and apparatus for synchronizing a first clock of a transmit node and a second clock of a receive node in a packet network are provided. Receive time stamps are generated for transferred packets at a receive node in-accordance with the second clock. Propagation delay variation is filtered from receive time stamp intervals through a filter in accordance with a frequency of the second clock. The filtered receive time stamp intervals and transmit time stamp intervals of the transferred packets are input into a phase locked loop to generate a new frequency for the second clock. The filter and the second clock are updated in accordance with the new frequency for synchronization with the first clock of the transfer node.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.