物联网感知层移动自组织网可靠性评估方法

摘要

移动自组织网可靠性是影响物联网应用的数据采集和设备控制的关键因素之一.为解决移动自组织网络可靠性的不确定性分析和量化评估的问题,综合考虑节点移动性引起的动态连接以及网络组件故障的因素,提出了一种基于节点移动的Ad_hoc网的可靠性计算方法.在两个节点移动时都保持速度和方向不变的条件下,首先预测其中一个节点有效链路保持的持续时间,然后考虑此节点某段时间内在速度和方向上的变化来评估此链路的有效性,进而间接地计算自组织网的可靠性.实验结果表明,移动自组织网的可靠性不仅依赖节点、链路可靠性,还依赖于网络拓扑的冗余度和节点在网络中的分布.%The reliability of mobile Ad hoc network is the key factors that affect data acquisition and device control in the application of IOT. In order to solve the problem of uncertainty of the reliability analysis and quantitative assessment, through overall considering these factors of dynamic connection and network components failures, which are brought out by nodes mobility, a method for computing the reliability of Ad hoc network based on nodes mobility was presented. When the speed and direction of two mobile nodes are stable, the continuous time in which valid link of one node is kept is forecasted. Then during some time, the speed and direction of the mobile node alter, and the validity of the link is evaluated. Therefore, the reliability of Ad hoc network is indirectly computed. The experiment results show that the reliability of Ad hoc network depends on not only the reliability of nodes and links but also the redundancy of topology and the distribution of nodes.