PAMAS—power aware multi-access protocol with signalling for ad hoc networks
ACM SIGCOMM Computer Communication Review
A distributed mechanism for power saving in IEEE 802.11 wireless LANs
Mobile Networks and Applications
Minimizing energy for wireless web access with bounded slowdown
Proceedings of the 8th annual international conference on Mobile computing and networking
Optimization of Efficiency and Energy Consumption in p-Persistent CSMA-Based Wireless LANs
IEEE Transactions on Mobile Computing
Online Power Monitoring for Wearable Systems
ISWC '02 Proceedings of the 6th IEEE International Symposium on Wearable Computers
Self-tuning wireless network power management
Proceedings of the 9th annual international conference on Mobile computing and networking
Analytical models for energy consumption in infrastructure WLAN STAs carrying TCP traffic
COMSNETS'10 Proceedings of the 2nd international conference on COMmunication systems and NETworks
Review: A survey of energy efficient MAC protocols for IEEE 802.11 WLAN
Computer Communications
Greening wireless communications: Status and future directions
Computer Communications
Fast track article: Balancing energy efficiency and throughput fairness in IEEE 802.11 WLANs
Pervasive and Mobile Computing
Energy consumption anatomy of 802.11 devices and its implication on modeling and design
Proceedings of the 8th international conference on Emerging networking experiments and technologies
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We focus on energy saving in 802.11-based WLANs. Previous work has shown that, on the one hand, 802.11 wireless interfaces consume a significant amount of energy, on the other hand the use of current power management schemes can severely degrade the QoS performance of several Internet-based applications. Furthermore, the energy spent by wireless devices may even increase when the standard 802.11 power-saving mode (PSM) is implemented. These facts suggest that other solutions to energy saving are highly needed.In this paper, we consider the 802.11 distributed access scheme and we propose a novel approach that enables a station to enter a low-power operational state during channel contention. More specifically, our technique exploits the virtual carrier sense mechanism and the backoff function specified in the IEEE 802.11 DCF, so that a station can dramatically reduce its energy consumption without significant degradation of the QoS performance. To efficiently implement our mechanism, a low-power state with negligible transition time into the active state must be identified. This can be any of the non-standard, low-power states defined by proprietary solutions in the current or next-generation products [7,15,22]. By using the network simulator ns2, we evaluate the performance improvement that is obtained when the proposed mechanism is implemented, against the results attained through the standard DCF. The results show that we can achieve a reduction in energy consumption as large as 80% and 28% under, respectively, UDP and TCP traffic.