低轨卫星互联网技术架构及地面验证方法

System Architecture and Ground Verification for LEO Satellite Internet

为了满足全时段全地域高速数据速率需求以及应对各国对空间资源日益激烈的竞争,被列入新基建范畴的低轨(Low earth orbit,LEO)卫星互联网已成为最具前景的解决方案之一。基于"通导遥一体化设计"理念,本文提出一种以"星间组网+星上处理+跳波束"为主要特征的系统技术架构。该架构对星间激光通信、高速星上路由处理、宽带跳波束等各项关键技术进行分析,并给出一种针对包含首颗发射卫星的低轨卫星互联网的地面试验验证方法。本文提出的卫星网络体系结构、关键技术解决方案和在轨验证结果,对我国卫星互联网的建设和发展具有有益的探索和借鉴意义。

In order to meet the requirements of high-speed data rates at any time in any region,and cope with the increasing competition for space resources among countries,the low earth orbit(LEO)satellite Internet,which is included in new infrastructure construction category,has become one of the most promising solutions.In this paper,based on the design concept of integrating three satellite application functions together,that is,satellite communication,satellite navigation enhancement and satellite remote-sensing,we put forward a system architecture that takes“inter-satellite networking+high speed processing on board+beam hopping”as its main technical characteristics.Through the analysis of key technologies such as intersatellite laser communication,high-speed satellite routing processing on board,and broadband beamhopping,the proposed architecture provides a ground verification method for this LEO satellite system containing the first launched satellite.The satellite network architecture,critical technical solutions and inorbit verification results proposed in this paper can serve as a useful exploration and reference for the construction and development of satellite Internet in China.