A Novel Pattern for Global Ubiquitous Interconnection:Key Technologies and Challenges of Direct-to-Smartphone
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,ultra-dense 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.
万方数据
维普
