全球泛在连接新模式:手机直连卫星关键技术及挑战

A Novel Pattern for Global Ubiquitous Interconnection:Key Technologies and Challenges of Direct-to-Smartphone

面向未来全球泛在连接通信需求,卫星通信对补盲通信覆盖盲区、增强无处不在的覆盖起到了至关重要的作用。手机直连卫星(DS)技术作为未来6G网络中实现全球天地融合、万物智联的一种技术手段,已成为近两年全球范围内的发展热点,得到学术界和产业界的广泛关注。该文介绍了手机直连卫星技术国内外发展现状和主流的技术路线,分析了手机直连卫星技术在频率资源使用受限、手机直连卫星宽带业务要求、海量用户业务时变非均匀分布、低轨卫星高动态影响以及手机高密度集成等方面遇到的发展挑战,并提出星地同频共用、超大阵面星载多波束天线、星地多维资源管控、适应卫星高动态的空口体制、极窄密集波束按需调度、高集成小型化手机设计等关键解决方案,最后对该文内容做了简要总结。

Satellite communication plays a crucial role in addressing blind spots and enhancing ubiquitous coverage for future global ubiquitous communication needs.Direct-to-Smartphone(DS)technology,as a technological means to achieve global integrated space-ground and intelligent connection of all things in the future 6G network,has become a hot development topic worldwide in the past two years and has received widespread attention.The development status and mainstream technical routes of DS technology in this article both domestically and internationally are introduced.The development challenges have been analyzed on DS technology in terms of limited frequency resource usage,broadband service requirements of DS,massive user business with time-varying and non-uniform distribution,high-dynamic effect of low earth orbit satellite,ultradense multi-beam influence,and high-density integration of smartphone.Key solutions such as satellite-ground co-frequency sharing,ultra-large array spaceborne multi-beam antenna,multi-dimensional resource management and control of satellite and ground,adapting to high dynamic satellite air interface system,on-demand scheduling of extremely narrow beam,and highly integrated smartphone design are proposed in this paper.Finally,the future development of DS technology is discussed.