1005-2615 2021 53 S1 57 61 10.16356/j.1005-2615.2021.S.009 article 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 inter-satellite laser communication， high-speed satellite routing processing on board， and broadband beam-hopping， 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 in-orbit verification results proposed in this paper can serve as a useful exploration and reference for the construction and development of satellite Internet in China. 低轨卫星互联网;通导遥一体化;跳波束;地面验证;卫星网络体系架构 low earth orbit （LEO） satellite Internet;integration of satellite communication， satellite navigation and satellite remote-sensing;beam hopping;ground verification;satellite network architecture 王崇,郝珊珊,康国栋,徐良,周洪刚 WANG Chong,HAO Shanshan,KANG Guodong,XU Liang,ZHOU Honggang 航天科工集团第二研究院航天科工空间工程发展有限公司，北京100854 The Second Academy of China Aerospace Science and Industry Corporation， CASIC Space Engineering Development Co.，Ltd.， Beijing 100854， China https://jnuaa.nuaa.edu.cn/njhkht/article/abstract/2021s1009