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Method and system for energy efficient signaling for 100mbps Ethernet using a subset technique

  • US 8,588,254 B2
  • Filed: 10/01/2008
  • Issued: 11/19/2013
  • Est. Priority Date: 12/17/2007
  • Status: Active Grant
First Claim
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1. A method for networking, the method comprising:

  • configuring an Ethernet PHY to communicate over a twisted-pair network link in compliance with 1GBASE-T or 10GBASE-T standards based on a successful completion of an autonegotiation process between said Ethernet PHY and a link partner;

    after said configuration, communicating by said Ethernet PHY with said link partner using four twisted pairs in said twisted-pair network link; and

    reducing, in response to a low link utilization condition, a number of twisted pairs of said twisted-pair network link over which said Ethernet PHY communicates with said link partner to less than four and reducing a size of a signal constellation utilized by said Ethernet PHY to encode data, said reduced signal constellation being a subset of a signal constellation used by said Ethernet PHY when communicating using four twisted pairs, such that said Ethernet PHY communicates at, 100 Mbps.

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