无线传感器网络中能耗平衡的传输策略

Energy consumption balanced data transmission scheme in wireless sensor networks

分簇无线传感器网络中存在着能量空洞的问题,而能量均匀消耗被认为是解决该问题的有效方法。将圆形无线传感器网络划分成不同宽度的同心圆,提出混合单跳传输和多跳传输的策略,以实现能量均匀消耗。与其他已经存在的研究不同,提出的策略针对的是传感器平均能量消耗的平衡,并能用线性方程组计算出多跳转发和单跳转发的概率。数值计算证实本方案能保证不同位置传感器平均能量消耗平衡,且能保持总体能量消耗在某个较低的水平。

The evenness of energy consumption is one of design challenges for data transmission in Wireless Sensor Networks （WSNs） which are affected by the energy-hole problem.With the circular network model which typically represents for a cluster in the clustered WSNs, the circular field is sliced into concentric circular bands of fixed width.An energy-balanced consumption scheme is then presented by combining the direct transmission protocol and hop-by-hop transmission protocol.Different from other existing schemes, this scheme aims to the balance of the average energy consumption, and can figure out the probabilities of hop-by-hop transmission and those of single-hop transmission by linear equations.Numerical results show this scheme balances the average energy consumption of different bands,while the individual energy consumption is kept in a rather low level.