Telefonaktiebolaget Lm Ericsson (publ)

Johelden Campos Bezerra

Boris Dortschy

Eduardo Lins De Medeiros

Aldebaro Klautau

Marcio Murilo Conte Monteiro

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.

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Johelden Campos Bezerra