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Analytical models for energy consumption in infrastructure WLAN STAs carrying TCP traffic

Agrawal, P and Kumar, A and Kuri, J and Panda, MK and Navda, V and Ramjee, R (2010) Analytical models for energy consumption in infrastructure WLAN STAs carrying TCP traffic. In: 2010 Second International Conference on Communication Systems and Networks (COMSNETS), 5-9 Jan. 2010, Bangalore.

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Abstract

We develop analytical models for estimating the energy spent by stations (STAs) in infrastructure WLANs when performing TCP controlled file downloads. We focus on the energy spent in radio communication when the STAs are in the Continuously Active Mode (CAM), or in the static Power Save Mode (PSM). Our approach is to develop accurate models for obtaining the fraction of times the STA radios spend in idling, receiving and transmitting. We discuss two traffic models for each mode of operation: (i) each STA performs one large file download, and (ii) the STAs perform short file transfers. We evaluate the rate of STA energy expenditure with long file downloads, and show that static PSM is worse than just using CAM. For short file downloads we compute the number of file downloads that can be completed with given battery capacity, and show that PSM performs better than CAM for this case. We provide a validation of our analytical models using the NS-2 simulator.

Item Type: Conference Paper
Additional Information: Copyright 2010 IEEE. Personal use of this material is permitted.However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.
Department/Centre: Division of Electrical Sciences > Electrical Communication Engineering
Date Deposited: 20 Dec 2011 06:35
Last Modified: 20 Dec 2011 06:35
URI: http://eprints.iisc.ernet.in/id/eprint/39030

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