基于能耗均衡的无线传感器网络数据融合树建立方法

ata aggregation is a widely used collection method in wireless sensor networks. To decrease the energy consumption of sensor nodes and networks, this paper proposes the strategy of balanced energy consumption(EBS) and a spanning tree construction algorighm(EBSPAN) based on this strategy. Considering the average level of nodes' energy, a k-tree can be build, so that each node connects with nodes of the same amount. But there are nodes whose energy is far from the average level, so a cut/graft strategy is used to make sure each node's communication traffic is proportional to its energy. This EBSPAN algorithm can avoid "hot spots" in former aggregation structures, so it prolongs the lifetime of WSNs. The simulation shows that EBSPAN performs well; especially the longevity of EBSPAN based WSNs. In a word, the EBSPAN algorithm possesses the quality of theoretical and practical signification.