航天测控网实时数据流量监控与分析技术

Real-time Data Traffic Monitoring and Analysis Techniques for China′s TT&C Network

航天测控网实时数据是航天发射中最重要的试验信息,实时数据交换直接影响着任务的顺利实施;由于航天中心采用自定义网络协议,商业软件不能够对协议数据进行有效监控和深入分析;根据航天测控网体系结构和业务特点,设计了被动式网络数据监控方案,采用专用硬件和底层驱动程序进行网络高速数据采集,实现了基于开源软件Wireshark的航天测控实时包数据交换协议(PDXP)的具体解析;实验结果表明,提出的实时数据监控和分析技术具备强大的数据包捕获和过滤能力,同时便于扩展网络协议,可以对航天中心各类传输信息进行监控和分析,为航天测控网数据监控、性能评估、故障诊断提供有效手段。

The real-time data in China＇ s TT＆C network is the most important experiment information about space launch. The real- time data exchange plays a pivotal role in the process of the space flight mission. The application data encapsulated by custom built network protocols used in the space center is not able to be effectively monitored and deep analysed with commercial software. A passive network data monitoring scheme is designed according to the features of TT＆C network architecture and traffic, using dedicated hardware and low level drivers for network to acquire high-speed data. A analyser for Packet Data eXchange Protocol （PDXP） that is one of real-time application protocols of TTC network is developed specifically based on open source software Wireshark. Experimental results show that the tech niques presented above with powerful capabilities of packet capture and filtering and good expansibility of protocol can be used to monitor and analyse various TT＆C network traffic as an effective means of monitoring data, evaluating performance and diagnosing fault in space center.