Adaptive clock recovery
US7411970B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 22, 2003 |
| Grant date | Aug 12, 2008 |
| Priority date | — |
| Expiry date | Mar 17, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04J3/0682
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A method of recovering a clock signal for a TDM output from packets of TDM data which have been transmitted over a packet network, from a source having a source TDM clock to a destination having a destination TDM clock. The method includes providing at least some packets with a Remote Time stamp representing the state of the source TDM clock when the packet is created; providing said at least some packets with a Local Timestamp representing the state of the destination TDM clock when the packet is received; determining a Transit Time value representing the difference between said Local and Remote Timestamps; and controlling the clock frequency of the TDM output on the basis of said Transit Time as determined above.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.