中继终端设备的天地网关功能设计与性能测试

Space-ground Gateway Function Design and Performance Test of Data Relay Terminal Equipment

近年来,空间网络协议大力发展,CCSDS空间网络协议体系已成为事实上的标准。基于跟踪与数据中继卫星系统(TDRSS)地面站中低速中继终端设备进行相应改造,增加网关路由板卡,加载CCSDS空间传输协议软件,将原来的中低速中继终端设备改造成带有路由网关功能的中低速中继终端设备。在此基础上,采用两台增加路由网关功能的中低速中继终端设备以及信道模拟器搭建天地网络演示验证系统,并分别对采用TCP协议和PEP增强协议作为传输层协议的HTTP应用进行了性能分析比对,证明PEP增强协议更能适应天地网络传输。

Recently,with the rapid development of space network,the Consultative Committee for Space Data Systems（CCSDS） protocol structure has become the standard.The mid-low speed data relay terminal equipment of Tracking and Data Relay Satellite System（TDRSS） ground station has been modified.After inserting routing gateway card and loading CCSDS protocol software,the previous mid-low speed data relay terminal equipment has become the one with routing gateway function.Then the space-ground network demonstration system has been constructed with two mid-low speed data relay terminal equipment with gateway function and channel simulator.The performance of HTTP application based on the TCP protocol and PEP enhanced protocol is analyzed and compared,which proves that PEP enhanced protocol suits the transportation of space-ground network system better.