Numerical methods in Markov chain modeling
Operations Research
Design of High Voltage xDSL Line Drivers in Standard CMOS
Design of High Voltage xDSL Line Drivers in Standard CMOS
Bell Labs Technical Journal - Green Information and Communications Technology (ICT) for Eco-Sustainability
IEEE Transactions on Very Large Scale Integration (VLSI) Systems
Insomnia in the access: or how to curb access network related energy consumption
Proceedings of the ACM SIGCOMM 2011 conference
Editorial: Editorial for Computer Networks special issue on "Green communication networks"
Computer Networks: The International Journal of Computer and Telecommunications Networking
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The large number of broadband users and its forecast growth has recently triggered research on energy-efficiency in digital subscriber lines (DSLs). A promising technique are low-power modes (LPMs) as standardized in asymmetric DSL 2 (ADSL2) which let the DSL connection operate in downstream direction with reduced transmit rate and power. We study the problem of optimizing the LPM rate-level for energy-efficiency. A traffic-independent rate setting is proposed based on an analytical competitive framework. Also, a Markov chain based LPM model is derived which facilitates the fast numerical optimization of the LPM rate-level under realistic traffic models and system constraints. Simulation results under various traffic settings and DSL scenarios demonstrate energy savings by LPMs of around 30-40% of the ADSL2 transceiver's power consumption. Furthermore, they provide insights on how to set the LPM rate-levels in practice for energy-efficient DSL operation.