Istituto di Informatica e Telematica     
Anastasi G., Conti M., Gregori E., Passarella A. Saving Energy in Wi-Fi Hotspots through 802.11 PSM: An Analytical Model. In: WiOpt '04 - Second IEEE Workshop on Modeling and Optimization in Mobile, Ad Hoc and Wireless Networks (Cambridge, UK, 2004). Proceedings, vol. 1 pp. 227 - 236. University of Cambridge, 2004.
Wi-Fi hotspots are becoming very popular. Due to limited costs, they are an e ective solution to provide wireless Internet access to nomadic users. A key point to exploit the potentialities of Wi-Fi hotspots is managing the scarce energetic resources of mobile devices. To this end, the IEEE 802.11 standard de nes a Power-Saving Mode aimed at reducing the energy consumption due to networking activities. In this paper we provide an analytical model of this algorithm. We derive closed formulas for mobile device energy consumption, and highlight its dependence on key parameters, such as the number of users inside the hotspot, the (wired) Internet throughput, and the MAC protocol parameters. The results reported show that, in a standard TCP/IP architecture, the 802.11 PSM scales quite well with respect to the number of users inside the hotspot. However, in some cases, it can even increase the energy consumption obtained without energy management.
Subject Wi-Fi hotspots
802.11 MAC protocol
Wireless networks

Icona documento 1) Download Document PDF

Icona documento Open access Icona documento Restricted Icona documento Private


Per ulteriori informazioni, contattare: Librarian http://puma.isti.cnr.it

Valid HTML 4.0 Transitional