Power consumption analysis of data transmission in IEEE 802.11 multi-hop networks
Wataru Toorisaka, Go Hasegawa, Masayuki Murata · IEICE Technical Report; IEICE Tech. Rep. · 2011
Internet access via wireless networks has become popular due to the rapid development of various wireless devices such as smartphones and tablet PCs. Since these devices consume a lot of electric power in data transmission over wireless networks, we need to reduce the power consumption in data transmission by such devices. In this thesis, we focus on wireless multi-hop networks based on IEEE 802.11 wireless LAN, which is often used for implementing wireless multi-hop networks. The IEEE 802.11 WLAN standard defines multiple data rates, each of which has various characteristics such as power consumption, data rate, modulation method, and transmission distance. It is important to choose the optimal data rate to reduce the power consumption, as well as improving data transmission performance. Furthermore, when considering data transmission over multi-hop networks, we need to take more factors into consideration since the data rate and transmission power affects the hop count between a sender and a destination, and resulting power consumption. In other words, we should choose an optimal data rate and transmission power by considering complicated trade-off relationships for achieving high-performance and energy efficient data transmission over wireless multi-hop networks. Therefore, in this thesis, we investigate the effect of data rate selection on power consumption in data transmission over IEEE 802.11-based wireless multi-hop networks. For this purpose, we give a detailed mathematical analysis of power consumption in multi-hop wireless data transmission. In the analysis, we consider detailed behaviors of the Carrier Sense Multiple Access with Collision Avoidance and the impact of interference from nodes out of the intended frame exchanges. In addition, we consider the various characteristics of IEEE 802.11 WLAN such as