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Delay versus energy consumption of the IEEE 802.16e sleep-mode mechanism

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5 Author(s)
S. De Vuyst ; SMACS Research Group, Ghent University, St.-Pietersnieuwstraat 41 Ghent B-9000, Belgium. ; K. De Turck ; D. Fiems ; S. Wittevrongel
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We propose a discrete-time queueing model for the evaluation of the IEEE 802.16e sleep-mode mechanism of power saving class (PSC) I in wireless access networks. Contrary to previous studies, we model the downlink traffic by means of a discrete batch Markov arrival process (D-BMAP) with N phases, which allows to take traffic correlation into account. The tradeoff between energy saving and increased packet delay is discussed. In many situations, the sleep-mode performance improves for heavily correlated traffic. Also, when compared to other strategies, the exponential sleep-period update strategy of PSC I may not always be the best.

Published in:

IEEE Transactions on Wireless Communications  (Volume:8 ,  Issue: 11 )