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Clock reconstruction for time division multiplexed traffic transported over asynchronous ethernet networks

  • US 7,289,538 B1
  • Filed: 08/14/2002
  • Issued: 10/30/2007
  • Est. Priority Date: 08/14/2001
  • Status: Active Grant
First Claim
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1. A method of clock synchronization for use in transporting synchronous traffic over an asynchronous network, said method comprising the steps of:

  • extracting a network timestamp from packets transported over said asynchronous network;

    generating a local timestamp for each received packet utilizing a local clock source;

    fitting a best straight line through sample points of network timestamp data and local timestamp data and generating a clock control signal in accordance with the resulting slope of said line; and

    adjusting said local clock source in accordance with said clock control signal so as to generate a reconstructed clock therefrom.

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