摘要
随着地面以太网组网技术的快速发展及广泛应用,空间通信与地面网络融合技术成为未来空间通信发展的必然趋势。目前,地面测控通信系统已实现基于网络的数据传输,但航天器内部数据传输仍以总线或点对点通信方式为主。若航天器内部设备之间信息交互采用组网技术,与地面网络实现一体化通信,可统一航天器内部和地面的通信协议,提高天地通信效率。相比于地面网络环境,航天器天地传输链路具有时延长、带宽有限、双向链路带宽不平衡以及航天器内部电磁环境复杂等特点,直接应用地面组网技术会存在天地一体化网络通信效率低、可靠性差等问题。为此,文中提出一种空间高效可靠的组网方案,构建以空间以太网交换机、天地网关为核心的航天器网络通信系统,并对地面网络协议进行改进和优化,实现航天器高效可靠的天地一体化网络通信。
With the rapid development and wide application of Ethernet networking technology,the integration technology of space communication and terrestrial network has become the main development trend of space communication in the future.The ground TT&C(tracking,telemetry and command)communication system has realized network⁃based data transmission while the internal data transmission of spacecraft is still dominated by bus or point⁃to⁃point communication.If the networking technology is adopted for the information interaction between the equipment inside the spacecraft to achieve integrated communication with the ground network,the communication protocol between the spacecraft internal and the ground can be unified and the efficiency of the communication between space and earth can be improved.In comparison with the ground network environment,the space⁃to⁃earth transmission link of spacecraft has the characteristics of long delay,limited bandwidth,unbalanced bandwidth of two⁃way link and complex electromagnetic environment in spacecraft,but if the ground networking technology is applied directly,it will make the space⁃to⁃earth integrated network occur problems of low communication efficiency and poor reliability.In view of the above problems,an efficient and reliable space networking scheme is proposed in this paper,a spacecraft network communication system with space Ethernet switch and space⁃to⁃earth gateway as its cores is constructed,and the ground network protocol is improved and optimized to realize the efficient and reliable space⁃to⁃earth integrated network communication of spacecraft.
作者
李光日
丁凯
王林涛
梁克
LI Guangri;DING Kai;WANG Lintao;LIANG Ke(Beijing Institute of Spacecraft System Engineering,Beijing 100094,China)
出处
《现代电子技术》
2023年第6期105-110,共6页
Modern Electronics Technique
基金
国家重大科技专项工程。
关键词
航天器
空间通信
天地通信
天地一体化网络
组网技术
数据传输
实验测试
spacecraft
space communication
space⁃to⁃earth communication
space⁃to⁃earth integrated network
networking technology
data transmission
experimental test
