一种新的基于动态最优簇数目的WSN分簇协议

Novel clustering protocol based on dynamic optimal number of clusters for wireless sensor network

针对低功耗自适应分簇(LEACH)协议不足,提出一种新的分簇协议,称为动态最优簇数目(DONC)分簇协议。在分簇阶段,它能够根据网络中剩余节点个数来确定最优簇数目而不是固定值,并在簇首选择中充分考虑节点能量和地理位置因素;在传输阶段,采用改进的簇首链式转发。仿真表明,协议能保证簇数目始终保持最优状态,并且簇首在网络中均匀分布,有效延长网络的生存期。

To improve the performance of Low Energy Adaptive Clustering Hierarchy （LEACH）, a novel clustering protocol called Dynamic Optimal Number of Clusters （DONC） was propnsed. In the set-up phase, it can determine the optimal number of clusters according to the remaining number of nodes rather than a fixed number. Furthermore, the remaining energy and the geographical position of nodes were fully considered in cluster-head selection; in the steady-state phase, a modified muhi-hop algorithm between cluster-heads was adopted. Simulation shows that the new protocol can guarantee the number of clusters is always in optimal state, and ensure the cluster-heads distributed evenly in the network and effectively prolong the system lifetime.