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Method and system for asymmetric transition handshake in an energy efficient ethernet network

  • US 8,654,774 B2
  • Filed: 10/02/2008
  • Issued: 02/18/2014
  • Est. Priority Date: 12/17/2007
  • Status: Active Grant
First Claim
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1. A method for communication, the method comprising:

  • in an Ethernet network comprising multi-rate link partners coupled via an Ethernet link;

    notifying, by a first of said multi-rate link partners, a second of said multi-rate link partners of a change of data rate in both directions on said Ethernet link; and

    configuring said first of said multi-rate link partners to implement said change of data rate for communication of data from said first multi-rate link partner to said second of said multi-rate link partners by controlling one or both of pulse amplitude modulation levels and signal constellation, wherein said implemented change occurs independently of delays that occur when, as a result of said notification, said second of said multi-rate link partners implements said change of data rate for communication of data from said second of said multi-rate link partners to said first of said multi-rate link partners;

    wherein said notification comprises a bit pre-pended to each of a plurality of Ethernet frames.

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