Green DSL: Energy-Efficient DSM

Dynamic spectrum management (DSM) has been recognized as a key technology for tackling multi-user crosstalk interference for DSL broadband access. Up to now, DSM design has mainly been focusing on maximization of data rates. However, recently, reducing the total power has become a main target, as IT power consumption has been identified as a significant contributor to global warming. In this paper we extend traditional DSM design towards a much wider energy-efficient scope and show how to tackle the corresponding optimization problems. The impact of this `green DSL' approach is evaluated for practice with some surprisingly good numerical results. Furthermore bounds are provided on the trade-off between data rate performance and power saving.

• Type: Journal
• Year: 2009
• Where: ICC
• Authors: Paschalis Tsiaflakis, Yung Yi, Mung Chiang, Marc Moonen
• Keywords: Communications, Data Rate, DSM Design, ICC 2009, Multi-user Crosstalk Interference