中文摘要：

在栅栏方式部署的无线传感器网络存活后期，借助少量具有一定移动能力的无线传感器节点，可以有效延长网络的生存期．首先，分析了可移动无线传感器节点分布特点，提出了一种确定寻找移动替换无线传感器范围的自适应调整协议；然后，建立了不同状态节点间的虚拟力模型，提出了一种基于虚拟力的移动传感器位置优化算法；最后，提出了一种基于虚拟力的栅栏覆盖移动节点活跃调度协议．实验结果表明，提出的方法在覆盖率与网络生存期方面均明显高于传统的静态无线传感器网络，网络负载没有显著增加．

英文摘要：

In the last period of wireless sensor network deployed by barrier coverage, the lifetime can be prolonged with the help of limited mobile wireless sensor. In this paper, we first analyze the distribution characteristics in the scene and propose an adaptive adjustment method of scoping replaceable mobile wireless sensor. Then, we establish a virtual force model of wireless sensor in different states. Last, we propose a mobile sensor active scheduling protocol based on virtual force. Simulations show that our methods provide effective enhancement in coverage probability and lifetime, compared with traditional static wireless sensor network. And, our methods bring minimal increase in network load.