A Balanced Capacity Implementation of DSM for DSL Systems

This paper investigates a fair resource allocation method in crosstalk limited DSL systems. As a measure of fairness, the concept of balanced capacity (BC), introduced in T. Sartenaer et al. (2005), is used. BC corresponds to a point of the boundary of the capacity region where each user experiences the same relative loss with respect to his maximum capacity. Our goal is to propose algorithms to compute the corresponding point in DSL (digital subscriber line) systems where some users suffer from a near-far situation and for constraints on individual power spectrum densities. Results are reported for typical crosstalk limited cases and are compared to a resource allocation optimized for the sum rate