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Dynamic Adjustment of Ad hoc Traffic Indication Map(ATIM) window to save Power in IEEE 802.11 DCF  

Nam, Jae-Hyun (Department of IT, Silla University)
Publication Information
Journal of information and communication convergence engineering / v.6, no.3, 2008 , pp. 343-347 More about this Journal
Abstract
Wakeup schemes that turn off sensors' radio when communication is not necessary have great potential in energy saving. At the start of each beacon interval in the IEEE 802.11 power saving mode specified for DCF, each node periodically wakes up for duration called the ATIM Window. However, in the power saving mechanism specified in IEEE 802.11, all nodes use the same ATIM window size. Since the ATIM window size critically affects throughput and energy consumption, a fixed ATIM window does not perform well in all situations. This paper proposes an adaptive mechanism to dynamically choose an ATIM window size according to network condition. Simulation results show that the proposed scheme outperforms the IEEE 802.11 power saving mechanism in terms of the amount of power consumed and the packet delivery ratio.
Keywords
ATIM; Asynchronous wakeup schemes; Power saving mechanism; IEEE 802.11 DCF;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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