空管系统中高可靠性双网冗余方法研究

Research on high reliable method of dual network redundancy in air traffic control

为了提高空管系统网络的可靠性,满足空管系统对网络的特殊需求,针对一种基于空管系统的高可靠性双网冗余方法进行了研究。在分析双网拓扑结构的基础上,详细介绍了网络状态监控模块和网络数据冗余模块。网络状态监控模块向核心交换设备发送探测包监测网络状态,并根据网络出现故障和网络故障恢复情况自动实施网络切换;网络数据冗余模块根据网络状况选择合适的传输路径将一份数据在双网上同时传输,实现数据的双网冗余,并在接收端采用数据过滤机制避免数据重收,保障网络切换的无缝性。实验结果表明,该方法具有高可靠性、部署简单、实施方便等特点,符合空管系统的要求。

In order to improve the reliability of air traffic control（ ATC） system and satisfy its special requirement,this paper researched a high reliable method of dual network redundancy. On the basis of dual-net topologies,two important modules were described in detail,one is network monitoring module and the other is data redundancy module. The network monitoring module in each terminal sent probe packets to the core switching equipment continuously to obtain the status of dual networks.The network would be switched automatically according to the network fault and recovery status. Based on the status of two networks,data redundancy module selects the appropriate path and transmits the same data at the same time both on A and B networks. Otherwise,data redundancy module adopts data filter to avoid receiving data repeatedly and ensures the two network seamless switch. The experimental results prove that this method is with the characteristics of high reliability,simple deployment and convenient implementation,which is fully satisfied with the requirement of ATC.