Broadband cable network utilizing common bit-loading

  • US 7,889,759 B2
  • Filed: 07/12/2004
  • Issued: 02/15/2011
  • Est. Priority Date: 05/04/2001
  • Status: Active Grant
First Claim
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1. A method for determining a common bit-loading modulation scheme for communicating between a plurality of nodes in a broadband cable network (“

  • BCN”

    ), the method comprising;

    transmitting a probe signal from a transmitting node within the plurality of nodes to a sub-plurality of receiving nodes within the plurality of nodes;

    receiving a plurality of response signals from the sub-plurality of receiving nodes wherein each response signal includes a bit-loading modulation scheme determined by a corresponding receiving node; and

    determining the common bit-loading modulation scheme from the received plurality of response signals;

    receiving the probe signal at one receiving node of the plurality of receiving nodes through a channel path of transmission;

    determining the transmission characteristics of the channel path at the one receiving node; and

    transmitting a response signal from the one receiving node to the transmitting node,wherein the transmission characteristics of the channel path are determined by measuring the signal-to-noise (“

    SNR”

    ) characteristics of the received probe signal at the one receiving node andwherein determining a common bit-loading modulation scheme includes;

    comparing a plurality of bit-loading modulation schemes from the corresponding received plurality of response signals; and

    determining the common bit-loading modulation scheme in response to comparing the plurality of bit-loaded modulation schemes.

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