天地一体化网络地面软网关技术及其应用

对天地一体化网络进行研究，重点对基于IP over CCSDS 协议的天地网关技术进行了分析，在此基础上提出了地面网关软件化技术。文章提出并实现了网关软件化实现过程中关键技术“数据链路层协议解析”和“网络层IP 数据包透明穿越”。与传统地面网关硬件实现相比，该技术具有成本低廉，使用配置灵活，可移植性强的特点，同时，该技术对使用环境和用户数量的变化具有高适应性，具有良好的应用前景。通过视频天地通信实例验证了地面软网关技术的有效性。

Research and Application on Ground Software Gateway Technology

In this paper, according to the study of integrated space and terrestrial information network, especially the key to the protocol based on“ IP over CCSDS”, the ground software gateway technology is proposed. Two key technologies are described, including“ data link layer protocol parsing & quot” and“ network layer IP packets transparent through”. Compared with the traditional ground gateway using hardware technology, the new method has low cost, more flexible configuration, and stronger portability. At the same time, the method is not bound by using environment and the numbers of users. Finally, the effectiveness of the new technology is validated by the examination of video communication from space to ground.