Maximizing the Lifetime of Sensor Network Using Local Information on Channel State and Residual Energy
Yunxia Chen, Qing Zhao · 2005
This paper investigates the lifetime of a sensor network employing difierent distributed transmission protocols. We show that the network lifetime depends on not only the initial energy of the sensors and the number of sensors but also the average transmission energy and the average residual energy in the network after the lifetime expires. We thus propose a new dis- tributed transmission scheme which utilizes the local information on both the channel state and the residual energy of a sensor node. Simulation results show that our new scheme achieves better lifetime performance than other available schemes. transmission energy but also the residual energy left in the network after the lifetime expires (this amount of energy is thus wasted). Aiming at a better balance between the aver- age transmission energy and the average wasted energy, we propose a new distributed transmission scheme which utilizes the local information on both the channel state and the resid- ual energy at each individual sensor. Simulation results show that our new scheme outperforms the picking best channel scheme when the number of sensors is large. There is a growing body of literature on the study of sensor network lifetime. Majority of existing work is on the analysis of network lifetime for a given network architecture and trans- mission protocols. See (5{9) and references therein. In (10,11), transmission protocols are proposed for sensor networks under the performance measure of energy e-ciency which does not take into account of the hard constraint of the limited energy at each sensor. The rest of the paper is organized as follows. Section II describes the network model and deflnes the lifetime. In Sec- tion III, we present the distributed transmission protocol via carrier sensing. In Section IV, we analyze the network life- time under difierent transmission schemes and propose a new protocol which achieves better lifetime performance. Simula- tion results that compare the lifetime of difierent transmission schemes are provided in Section V while Section VI concludes this paper.