天地一体化新路径:手机直连卫星发展热点、挑战与关键技术

New Approach of Integration Space-Ground:Hotspots,Challenges,and Key Technologies of Direct-to-Smartphone

手机直连卫星作为未来实现天地一体化融合的一种潜在技术手段,得到了产业界和学术界的广泛关注。与传统的卫星移动通信相比,当前手机直连卫星技术存在诸多挑战。针对基于同步轨道卫星和非同步轨道卫星的两种手机直连技术路线,分析国内外发展现状、系统组成架构,并从空口侧、卫星侧、网络侧和终端侧梳理技术挑战,提出星地同步、星载超大阵面天线、星地异构网络漫游等若干解决方案,为手机直连卫星技术的发展提供技术支撑。最后对手机直连卫星的发展进行展望。

Direct-to-smartphone,as a potential technological means for achieving the integration of space and ground in the future,has received widespread attention from industry and academia.Compared with traditional satellite mobile communication,there are many challenges in the current direct-to-smartphone technology.The current development status and system architecture of two di-rect-to-smartphone technology routes based on synchronous orbit satellites and asynchronous orbit satellites were introduced,and the technical challenges from the air-interface side,satellite side,network side,and terminal side were summarized.Several solutions were proposed,included satellite-terrestrial synchronization,satellite-borne ultra-large array antenna,and satellite-terrestrial heterogeneous network roaming,providing technical support for the development of direct-to-smartphone technology.Finally,a brief outlook were provided.