Operating points for spectrum management in digital subscriber lines

Abstract

A method of determining a number of operating points for spectrum management of a plurality of digital subscriber lines in a communications network, the method comprising the steps of: determining optimization criteria (O) for the digital subscriber lines; determining crosstalk gains (G) for the digital subscriber lines; determining an initial population (P) of operating points (x, . . . , x) where each of the operating points comprises importance ratings for each digital subscriber line of the plurality of digital subscriber lines; calculating new values of crosstalk and power spectrum densities (S) for the digital subscriber lines, by executing spectrum balancing for each operating point until the optimization criteria are fulfilled; calculating a new population of operating points, by executing an evolutionary algorithm; and iteratively performing the steps of calculating until a predefined stopping criterion is fulfilled.