航天测控中心域间网络组播技术的应用研究

Research on Application of the Multicast Technology in Aerospace TT&C centers

传统测控中心之间的信息交互使用帧中继和DDN网进行通信,各测控中心间使用数据链路层简化HDLC协议约定信息格式。随着网络技术的发展,异地之间的数据传输逐步采用以SDH网为基础加载以太网应用的方式。这种应用模式在提高网络传输速率及传输实时性的同时,可以承载多种业务类型数据传输,尤其是组播技术在航天测控中心网络的应用已成为今后测控中心网络系统的发展趋势。本文分析了测控中心组播路由的建立过程,提出了测控中心域间组播应用的思路,通过仿真进行了测试和验证。

Traditionally,frame relay and digital data network(DDN)are used to transmit information between tracking,telemetry and control(TT&C)centers.At the same time,they use the information format established with a simplified HDLC protocol.With the development of network technology,the way of Ethernet application based on SDH network is gradually used between different areas for data transmission.This application mode can not only improve the transfer speed and real time quality,but also can support many kinds of data transmission,especially the multicast technology used in aerospace TT&C centers network has become the development trend of the system.This paper analyzes the process of establishing multicast routing in the TT&C center.Then it proposes an idea in the use of multicast technology between TT&C centers.Finally,it has been tested and validated through simulation.