Patent ID: 7903725

Claim:
A method for optimizing digital subscriber line (DSL) communications performance over a cable bundle having at least a first loop and a second loop and including at least an active DSL loop communication on the first loop, comprising the steps of: performing a DSL loop initialization process with respect to a new DSL loop communication on the second loop of the cable bundle, the initialization process including: identifying a group of plural subcarriers numbering less than a total number of available subcarriers on the second loop which are needed for carrying a required bit rate of the new DSL loop communication; sliding the identified group of plural subcarriers across a frequency band that includes the total available subcarriers; calculating, at each of a plurality of location positions within the frequency band for the slid identified group of plural subcarriers, a crosstalk noise contribution of the new DSL loop communication to the cable bundle, wherein the crosstalk noise contribution varies as a function of location position; and choosing one of the location positions for the slid identified group of plural subcarriers, wherein the chosen location position is the location position where the calculated crosstalk noise contribution to the cable bundle by the new DSL loop communication is lowest; and generating a DMT signal using the identified group of plural subcarriers positioned at the chosen location position to carry the new DSL loop communication.