ESACW: an adaptive algorithm for transmission power reduction in wireless networks

In this paper we propose a new algorithm for reducing the energy dissipation of a wireless ad-hoc network. We first show that the performance and energy dissipation is a function of the probability of packet collision, which can be varied by changing the minimum contention window (CW_min) parameter. Then we propose all algorithm, based on the IEEE 802.11 protocol, which can dynamically adjust CW_min for better performance and power. Experimental results show that, comparing to the original protocol, the proposed method can save 30% to 60% energy dissipation, and achieve similar or better performance.