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Optimal Multi-user Spectrum Management for Digital Subscriber Lines

By Raphael Cendrillon, Wei Yu, Marc Moonen, Jan Verlinden and Tom Bostoen

Abstract

Crosstalk is a major issue in modern DSL systems such as ADSL and VDSL. Static spectrum management, the traditional way of ensuring spectral compatibility, employs spectral masks which can be overly conservative and lead to poor performance. In this paper we present a centralized algorithm for optimal spectrum management (OSM) in DSL. The algorithm uses a dual decomposition to solve the spectrum management problem in an efficient and computationally tractable way. The algorithm shows significant performance gains over existing DSM techniques, e.g. in an upstream VDSL scenario the centralized OSM algorithm can outperform a distributed DSM algorithm such as iterative waterfilling by up to 380%

Topics: crosstalk, optimal spectrum management, algorithms, 291706 Broadband Network Technology
Year: 2004
OAI identifier: oai:espace.library.uq.edu.au:UQ:9939

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