Abstract: In wireless sensor networks sensor nodes transmit their collect data to designated cluster heads，cluster heads aggregate the data packets and send them via multi-hop communication to the base station.Nodes closer to the base station tend to die earlier because more data packets are needed to transmit，which is so-called energy holes problem.To address the problem，we propose a non-uniform deployment algorithm through investigating energy consumption in wireless sensor network.The algorithm presents a density function to deploy sensor nodes and enables that area closer to the base station has more nodes.Simulation results show that our proposed algorithm is effective for prolonging the network lifetime.

Key words: wireless sensor networks, non-uniform deployment, lifetime

摘要： 在无线传感器网络中，传感器节点将收集到的数据传输到簇头，经簇头聚合后数据包以多跳方式发送到基站。靠近基站的节点，因转发的数据较多而提早死亡，出现所谓的能量空洞问题。为此，对无线传感器网络中节点的能耗情况进行了研究，提出了一种非均匀的节点布置算法，得出了一个布置传感器节点的密度函数，在靠近基站的区域内布置较多的节点。仿真实验表明，非均匀的节点布置算法能有效延长网络的生命周期。

关键词: 无线传感器网络, 非均匀布置, 生命周期