Trade-off between Energy and Delay in MAC Layer of Wireless Sensor Networks
YU Hai-xun · Jisuanji fangzhen · 2008
One of the most important constraints on nodes of wireless sensor networks is the low power consumption requirement.Sensor nodes carry limited,generally irreplaceable power sources.Therefore,while traditional networks aim to achieve high quality of service provisions,sensor network protocols must focus primarily on power conservation.This paper presents the characteristics of energy consuming state and average delay in 802.11 MAC and S-MAC specifically designed for wireless sensor networks based on the theoretical and mathematical analysis.We measure the energy consuming and average delay in the 802.11 MAC and S-MAC in the simulation topology node.S-MAC achieved the expense of the efficient use of energy based on latency increase through some novel technologies as periodical sleep,overhearing avoidance and message passing.It provides a trade-off scheme between energy consuming and latency.