基于GEO通信卫星的低轨航天器数据通信协议研究  

Research on Data Communication Protocol of Low Orbit Spacecraft Based on GEO Communications Satellite

作　　者：石云[1] 程子敬[1] 柳绵 SHI Yun, CHENG Zijing, LIU Mian(Beijing Institute of Satellite Information Engineering, Beijing 100086, Chin)

机构地区：[1]北京卫星信息工程研究所,北京100086

出　　处：《航天器工程》2018年第3期33-38,共6页Spacecraft Engineering

基　　金：国家自然科学基金项目(91538202)

摘　　要：在分析传统低轨航天器数据传输方式的基础上,提出了一种基于地球静止轨道(GEO)通信卫星数据传输的网络结构及相应的双协议栈设计。该网络结构根据低轨航天器特点及双层卫星网络的优势,在低轨航天器上设计双协议栈,即低轨航天器与地面站之间的链路使用空间通信协议标准-传输协议(SCPS-TP),低轨航天器与通信卫星之间的链路使用利克里德传输协议(LTP)。同时,整个网络中实现两个协议转换网关,即低轨航天器网关实现SCPS-TP协议与LTP协议之间的转换,地面网关实现SCPS-TP协议与传输控制协议(TCP)协议之间的转换。仿真结果表明:低轨航天器采取双协议栈(SCPS-TP/LTP)的传输速率优于单一采取TCP协议,可为低轨航天器的数据传输任务应用提供技术基础。After analysis of several existed the data transmission mode of low orbit spacecraft, an architecture and protocol stack design based on GEO communications satellite transmission is proposed. The architecture uses the double layered satellite advantages with full consideration of the low orbit spacecraft property. A dual protocol stack is designed for low orbit spacecraft. The space communications protocol specification-transport protocol （SCPS-T P ） is used between low orbit spacecraft and ground stations〉 the licklider transmission protocol （LTP） is used between low orbit spacecraft and GEO communications satellite. Including ground station gateway and spacecraft gateway, SCPS-TP/L T P , TCP/SCPS-TP conversion are implemented respectively. The results of system-level simulation indicate that the proposed protocol stack can improve the performance of data transmission and is better than only TCP. It is significant to the application of low orbit spacecraft.

关 键 词：低轨航天器 多层卫星网络 延时容忍网络(DTN) 空间通信协议标准-传输协议 传输控制协议 

分 类 号：TN927[电子电信—通信与信息系统]