能耗均衡的无线传感器网络两级路由协议*

传感器网络分簇路由协议研究的一个关键问题是如何最优化组簇，既能有效降低簇内节点能耗，又能均衡整个网络能耗。为此，提出一种能耗均衡的网络两级分层分簇路由协议。协议底层应用PSO算法实现网络节点最优化分簇；上层选择总簇头节点负责收集、融合簇头数据并发送至基站。仿真结果表明，本协议能有效降低节点死亡速度，延长网络生存周期。

Energy-balanced clustering routing protocol of two-layer hierarchy for wireless sensor networks

The most important problem of the clustering protocol for WSN is how to cluster all nodes with the optimization way, which can not only decrease the energy consumption of the nodes, but also balance the energy dissipation of the entire network. Therefore,this paper proposed a new centralized clustering protocol of two-layer hierarchy, which was compact, energy-aware and energy-consumption-balanced. In the lower layer of the protocol, the optimal cluster of all nodes using PSO algorithm was realized. And in the upper layer, the chief-cluster-head, which was responsible for collecting, aggregating the data of all cluster heads and sending the fused data to the base station, was selected. Simulation results demonstrate that the protocol can efficiently decrease the dead speed of the nodes and prolong the network lifetime.