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http://dx.doi.org/10.7471/ikeee.2018.22.3.651

Energy-Efficient Transmission Bandwidth Adaptation in IEEE 802.11 WLANs  

Hwang, Hwanwoong (Dept. of Electrical and Information Engineering, Seoul National University of Science and Technology)
Yun, Ji-Hoon (Dept. of Electrical and Information Engineering, Seoul National University of Science and Technology)
Publication Information
Journal of IKEEE / v.22, no.3, 2018 , pp. 651-657 More about this Journal
Abstract
IEEE 802.11 wireless LANs support 20, 40, 80 and 160MHz bandwidth transmission. In general, the data rate increases as the transmission bandwidth increases. However, the transmission power spectral density decreases, which may lead to increasing packet errors and retransmissions. In this paper, we derive a mathematical model of energy consumption with consideration of various factors such as transmission bandwidth, packet error rate and data size. Based on the model, we design a scheme to adapt a transmission bandwidth for each frame transmission. The scheme estimates packet error rates for different bandwidth cases, updates the table of energy consumption and selects the best bandwidth for the next transmission. The simulation study with VoIP traffic shows the energy consumption of the scheme under various environments.
Keywords
IEEE 802.11; wireless LAN; wide-band operation; bandwidth adaptation; energy consumption;
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