Publications:Coverage Optimization in DSL Networks by Low-Complexity Discrete Spectrum Balancing

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Title Coverage Optimization in DSL Networks by Low-Complexity Discrete Spectrum Balancing
Author M. Wolkerstorfer and Tomas Nordström
Year 2011
PublicationType Conference Paper
Conference In Proc. IEEE Global Communications Conference (GLOBECOM), Houston, Texas, USA, December 5-9, 2011
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Abstract Spectrum balancing is an established optimization approach in multi-carrier digital subscriber line (DSL) systems. It has previously been applied to very different performance objectives such as sum-rate, min-rate, or fairness maximization and sum-power minimization. In this work we study the maximization of the service coverage, which will be defined as the number of DSL lines which can be granted an operator-specified high-bandwidth service. The proposed algorithm is based on a previously described mathematical decomposition framework. We extend this framework for our new problem and enhance its scalability by various low-complexity heuristics. Simulations demonstrate the applicability of our algorithm for DSL networks of realistic sizes. More precisely, our results obtained in thousand 25 user near-far DSL scenarios show an average gain in service coverage of more than 13% compared to state-of-the-art sum-rate maximizing spectrum balancing algorithms. © 2011 IEEE.