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基于节点密度与TDMA的无线传感器网络集簇协议
引用本文:徐祥振,汪成亮.基于节点密度与TDMA的无线传感器网络集簇协议[J].传感技术学报,2015,28(11):1689-1694.
作者姓名:徐祥振  汪成亮
作者单位:重庆大学计算机学院信息物理社会可信服务计算教育部重点实验室,重庆,400044
基金项目:国家自然科学基金,中央高校基本科研基金
摘    要: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。

关 键 词:无线传感器网络  集簇分层协议  节点密度  时隙分配

Node Density and TDMA Based Clustering Hierarchy Protocol of Wireless Sensor Network
Abstract:Since the low-cost and easy installment of Wireless sensor networks(WSN),it has been widely used in national defense,health care,environmental monitoring and other fields. However,WSN has limited node energy and 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 protocol introduces TDMA slot allocation phase,in which selected nodes enter sleep mode depending on their density. It can effectively 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.
Keywords:wireless sensor network  clustering hierarchy protocol  node density  time slot allocation
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