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Methods and systems for carrying synchronization over Ethernet and optical transport network

  • US 8,059,685 B2
  • Filed: 12/26/2006
  • Issued: 11/15/2011
  • Est. Priority Date: 12/26/2006
  • Status: Active Grant
First Claim
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1. A method for carrying synchronization over Ethernet, the method comprising the steps of:

  • receiving a clock source;

    inserting a timing marker into an Ethernet stream responsive to an input from the clock source, wherein the timing marker is marked with a special 8 b/10 b symbol;

    transmitting the Ethernet stream;

    receiving the Ethernet stream;

    extracting the timing marker from the Ethernet stream; and

    establishing a timing reference signal responsive to the frequency between timing markers;

    wherein one of the timing marker, a specific number of bytes per frame, and a specific character or sequence provide a decomposition of the Ethernet stream into frames comprising a fixed bandwidth and an excess bandwidth.

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