Theoretical and practical limits of dynamic voltage scaling
Proceedings of the 41st annual Design Automation Conference
Reducing network energy consumption via sleeping and rate-adaptation
NSDI'08 Proceedings of the 5th USENIX Symposium on Networked Systems Design and Implementation
Performance evaluation of energy efficient ethernet
IEEE Communications Letters
Sleep and adaptive link rate control for power saving in 10G-EPON systems
GLOBECOM'09 Proceedings of the 28th IEEE conference on Global telecommunications
IEEE 802.3az: the road to energy efficient ethernet
IEEE Communications Magazine
An energy-aware dynamic RWA framework for next-generation wavelength-routed networks
Computer Networks: The International Journal of Computer and Telecommunications Networking
Value optimization of survivable multilayer IP/MPLS-over-WSON networks
Photonic Network Communications
Eco-sustainable routing in optical networks
Photonic Network Communications
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Power management strategies that allow network infrastructures to achieve advanced functionalities with limited energy budget are expected to induce significant cost savings and positive effects on the environment, reducing Green House Gases (GHG) emissions. Power consumption can be drastically reduced on individual network elements by temporarily switching off or downclocking unloaded interfaces and line cards. At the state-of-the-art, Adaptive Link Rate (ALR) and Low Power Idle (LPI) are the most effective local-level techniques for lowering power demands during low utilization periods. In this paper, by modeling and analyzing in detail the aforementioned local strategies, we point out that the energy consumption does not depend on the data being transmitted but only depends on the interface link rate, and hence is throughput-independent. In particular, faster interfaces require lower energy per bit than slower interfaces, although, with ALR, slower interfaces require less energy per throughput than faster interfaces. We also note that for current technologies the energy/bit is the same both at 1 Gbps and 10 Gbps, meaning that the increase in the link rate has not been compensated at the same pace by a decrease in the energy consumption.