基于节点密度与TDMA的无线传感器网络集簇协议

Node Density and TDMA Based Clustering Hierarchy Protocol of Wireless Sensor Network

无线传感器网络(WSN)具有节点成本低、易于布置等优点,已广泛应用于国防军事、医疗健康、环境监测等领域。针对WSN中存在的节点能量有限,簇间干扰严重的问题,结合大多应用中WSN具有节点密度分布不均匀的特性,提出一种基于节点密度与时分多址(TDMA)的WSN自适应集簇分层(DT-LEACH)协议。DT-LEACH协议通过在簇首选举阶段考虑节点剩余能量,保证簇首的均匀分布,延长了网络生存周期;其次,DT-LEACH协议引入TDMA时隙分配阶段,根据节点密度选择节点进入休眠模式,有效地避免了簇间干扰,降低了数据冗余性,减少了网络能耗。仿真实现表明,DT-LEACH协议能有效避免簇间干扰,延长WSN网络生存周期。

Since the low-cost and easy installment of Wireless sensor networks（WSN）,it has been widely used innational defense,health care,environmental monitoring and other fields. However,WSN has limited node energyand severe inference between clusters. Based on the uneven distribution characteristic of nodes exists in most appli-cations of WSN,we proposed a Density and TDMA based Low Energy Adaptive Clustering Hierarchy（DT-LEACH）protocol. DT-LEACH protocol extends the life cycle of WSN by considering the residual energy of nodes and en-sures uniform distribution of cluster heads during the cluster head selection phase. Moreover,DT-LEACH protocolintroduces TDMA slot allocation phase,in which selected nodes enter sleep mode depending on their density. It caneffectively avoid interference between clusters,while reducing data redundancy and network energy consumption.Simulation results show that DT-LEACH protocol can effectively avoid inter-cluster interference and prolong life-time of WSN network.