中国移动通信有限公司研究院,北京 100053
赵阳,zhaoyangyj@chinamobile.com
收稿:2026-07-16,
修回:2026-08-05,
录用:2026-08-20,
移动端阅览
程锦霞, 赵阳, 于天意, 等. 面向5G存量手机直连卫星及未来6G场景的关键技术研究[J/OL]. 电信科学, 2026.
Cheng Jinxia, Zhao Yang, Yu Tianyi, et al. Research on key technologies for 5G legacy smartphone direct-to-satellite communications and future 6G scenarios[J/OL]. Telecommunications Science, 2026.
程锦霞, 赵阳, 于天意, 等. 面向5G存量手机直连卫星及未来6G场景的关键技术研究[J/OL]. 电信科学, 2026. DOI: 10.11959/j.issn.1000-0801.DXKX260488.
Cheng Jinxia, Zhao Yang, Yu Tianyi, et al. Research on key technologies for 5G legacy smartphone direct-to-satellite communications and future 6G scenarios[J/OL]. Telecommunications Science, 2026. DOI: 10.11959/j.issn.1000-0801.DXKX260488.
随着5G非地面网络(NTN)技术研究的不断深入以及6G空天地海一体化愿景的提出,存量手机直连卫星技术凭借其低成本、易部署、可快速落地等优势,被视为实现全球无缝覆盖的重要技术途径之一。首先分析了5G存量手机直连卫星场景面临的时频同步失效、随机接入超窗、链路预算不足等核心挑战;其次,针对上述问题,提出了面向存量手机直连卫星的基于动态参考点的时间同步技术、基于静态参考点的频率同步技术、以及随机接入增强技术方案;最后,通过仿真与实验室测试,充分验证了所提存量手机直连卫星技术方案的可行性,同时表明了所提时频同步技术可为6G NTN中无全球导航卫星系统(GNSS)场景中的终端接入与同步提供关键技术支撑。
With the continuous deepening of research on 5G non-terrestrial networks (NTN) and the proposal of the 6G integrated space-air-ground-sea vision
the direct-to-satellite technology for legacy smartphones
featuring advantages such as low cost
easy deployment
and rapid implementation
was regarded as one of the important technical approaches to achieve global seamless coverage. Firstly
the core challenges faced by the 5G legacy smartphone direct-to-satellite scenario were analyzed
including time and frequency synchronization failure
random access window overrun and insufficient link budget. Secondly
to address the above issues
a time synchronization scheme based on dynamic reference points
a frequency synchronization scheme based on static reference points
and a random access enhancement scheme for legacy smartphone direct-to-satellite communication were proposed. Finally
through simulations and laboratory measurements
the feasibility of the proposed technical schemes was fully verified
and it was also demonstrated that the proposed time-frequency synchronization schemes can provide key technical support for terminal access and synchronization in global navigation satellite system (GNSS)-free scenarios of 6G NTN.
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