基于拨备满足模型的无线传感网节点覆盖算法

针对无线传感网预覆盖过程中存在覆盖盲区以及数据频繁重传而导致的节点覆盖抑制现象，提出了一种基于拨备满足模型的无线传感网网络覆盖算法。设计一种新的无线传感网节点覆盖模型，并构建覆盖指数、覆盖强度、覆盖均衡评估系数等评估维度，快速评估节点覆盖质量。再计算覆盖均衡评估系数，并采用拨备模型优化覆盖质量，确定覆盖性能优越的备用工作节点。随后，基于覆盖相似性原则评估工作节点覆盖性能，设计了节点首次覆盖评估方法，按节点移动路径依次评估覆盖指数统计均值，并根据目标节点进入覆盖区域的先后，逐次激活性能最佳的工作节点进行监测。仿真实验表明：与当前无线传感网常数节点覆盖方案相比，所提方案具有更高的网络覆盖率、更短的覆盖启动时间和更少的工作节点数目。

Node coverage scheme for wireless sensor networks based on reserve satisfaction model

In order to solve the problem of node coverage suppression caused by blind area coverage and frequent data retransmissions in the pre-coverage process of wireless sensor networks, a coverage algorithm for wireless sensor networks based on reserve satisfaction model is proposed. Firstly, a new wireless sensor network node coverage model is designed, and the coverage index, coverage intensity, coverage balance evaluation coefficient and other evaluation dimensions are constructed to quickly evaluate the coverage quality of nodes. Secondly, the coverage equilibrium evaluation coefficient is calculated, and the backup model is adopted to optimize coverage quality and determine the backup working nodes with superior coverage performance. Then, based on the principle of coverage similarity, the coverage performance of working nodes is evaluated, and the first coverage evaluation method is designed. The statistical mean of coverage index is evaluated according to the moving path of the nodes. According to the sequence of the target nodes entering the coverage area, the working nodes with the best performance are activated. The simulation results show that the proposed scheme has higher network coverage, shorter coverage start-up time and less work compared with the current constant node coverage schemes of wireless sensor networks.