无线传感器网络单汇聚节点选址策略

无线传感器网络中，所有节点收集到的数据都通过多跳的方式转发到汇聚节点，因此汇聚节点的选址策略对网络寿命有很大的影响。首先在节点随机分布的无线传感器网络中简单分析了汇聚节点的面向能量选址策略，然后进一步探讨了面向寿命的选址策略，最后结合基于路由代价的蚁群路由算法在无线传感器网络中对两种选址策略进行仿真，仿真结果显示面向寿命选址策略的网络总能耗稍大于面向能量的选址策略，但前者能在较低网络能耗的基础上有效地延长网络寿命。

Single sink node placement strategies in wireless sensor networks

In wireless sensor networks(WSN),all the data collected by sensors are forwarded to a sink node in a multi-hop way.The placement strategy of the sink node has a significant impact on the network lifetime.Firstly,the energy-oriented sink node placement strategy is introduced in randomly distributed WSN.Secondly,the lifetime-oriented sink node placement strategy is investigated.Finally,these two placement strategies are put in simulations in WSN with a routing-cost based ant routing algorithm.Simulation results show that the energy consumption of the networks with lifetime-oriented strategy is a little greater than that of the networks with energy-oriented strategy,but the lifetime of the former networks is prolonged effectively with a lower energy consumption.