Isolation plays an important role in the security of wireless sensor networks. Existing isolation models for wireless sensor networks possess excessive energy consumption. We propose a double-layer isolation mechanism based on an improved Dijkstra algorithm. The number of “optimal” nodes is obtained based on the calculation formula. Two groups of “optimal” nodes are determined by the arrival time difference ranging algorithm and the improved Dijkstra algorithm. The first layer isolation and the second layer isolation are constructed by the obtained two groups of “optimal” nodes, respectively. According to the status of receiving and sending data, the “optimal” routing protocol and working mode are selected. Based on the cooperation between two layers of isolation, intruded nodes are isolated from a wireless sensor network. The intrusion source is detected by monitoring the intruded nodes. Simulation results show that the proposed isolation mechanism can effectively reduce the energy consumption of wireless sensor nodes. High transmission efficiency, rapid response, and enhanced security are provided for wireless sensor networks.

隔离在无线传感器网络的安全性中起着重要作用。无线传感器网络的现有隔离模型拥有过多的能耗。我们提出了一种基于改进的Dijkstra算法的双层隔离机制。根据计算公式获得“最佳”节点数。两组“最佳”节点由到达时间差测距算法和改进的Dijkstra算法确定。第一层隔离和第二层隔离分别由获得的两组“最佳”节点构成。根据接收和发送数据的状态，选择“最佳”路由协议和工作模式。基于两层隔离层之间的协作，入侵节点与无线传感器网络隔离。通过监视入侵节点来检测入侵源。仿真结果表明，提出的隔离机制可以有效降低无线传感器节点的能耗。为无线传感器网络提供了高传输效率，快速响应和增强的安全性。