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由于飞机节点的通信距离有限,航空自组网的网络拓扑高动态的变化会导致频繁的网络分割并严重影响网络上层应用的正常运行。为了保证飞机节点之间端到端的连通性不受影响,航空自组网必须具备容错性,即任意一个节点或链路失效后网络仍然连通。通常情况下飞机节点的运动不可控,因此可在网络中加入一定数量的中继节点,通过控制中继节点的运动速度来实现并维持航空自组网的容错性。提出了一种在线中继节点速度控制方法,该方法根据网络当前状态计算出中继节点的最佳运动方式,在保证网络容错的前提下使得中继节点在网络运行时间内所运动的总路程最短。仿真结果表明该中继节点速度控制方法在航空自组网的容错控制方面具有潜在的应用前景。
Due to the limited communication distance of the aircraft nodes, the high dynamic change of the AV network topology will lead to frequent network segmentation and seriously affect the normal operation of the network upper layer applications. In order to ensure that the end-to-end connectivity between aircraft nodes is not affected, Ad Hoc network must be fault-tolerant, that is, the network is still connected after any node or link fails. Under normal circumstances, the movement of aircraft nodes is uncontrollable. Therefore, a certain number of relay nodes can be added to the network. By controlling the movement speed of relay nodes, fault tolerance of MANET is realized and maintained. This paper presents a method for controlling the speed of online relay nodes. The method calculates the best movement mode of relay nodes according to the current state of the network. Under the premise of ensuring network fault tolerance, the total distance traveled by the relay node during the network running time The shortest. The simulation results show that the method of relay node speed control has potential application in fault tolerance control of MANET.