全球泛在连接新模式：手机直连卫星关键技术及挑战

何元智; 肖永伟; 张世杰; 封龙; 李志强

doi:10.11999/JEIT240032

全球泛在连接新模式：手机直连卫星关键技术及挑战

doi: 10.11999/JEIT240032

1.
军事科学院系统工程研究院北京 100141
2.
中国电子科技集团公司第五十四研究所石家庄 050081
3.
银河航天(北京)网络技术有限公司北京 100192

详细信息

作者简介:
何元智：女，研究员，博士生导师，研究方向为卫星通信、天地一体化网络

肖永伟：男，高工，研究方向为低轨卫星通信系统设计

张世杰：男，教授，研究方向为卫星互联网、空间通信、卫星总体设计

封龙：男，高工，研究方向为卫星移动通信终端设计

李志强：男，博士生，研究方向为卫星干扰分析

通讯作者:
何元智　he_yuanzhi@126.com

中图分类号: TN927.2
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- 被引次数: 0
出版历程
- 收稿日期: 2024-01-19
- 修回日期: 2024-04-17
- 网络出版日期: 2024-05-06
- 刊出日期: 2024-05-30

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

1.
Institute of Systems Engineering, Academy of Military Sciences, Beijing 100141, China
2.
54th Research Institute of China Electronics Technology Group Corporation, Shijiazhuang 050081, China
3.
Yinhe Hangtian (Beijing) Internet Technology Co., Ltd., Beijing 100192, China

摘要

摘要: 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。
- 卫星通信 /
- 6G /
- 手机直连卫星 /
- 非地面网络
Abstract: 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.
- Satellite communication /
- 6G /
- Direct-to-Smartphone (DS) /
- Non-terrestrial network

HTML全文

图 1 未来手机直连卫星通信系统示意图

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图 2 国内典型直连卫星手机终端

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图 3 ASTS公司BlueWalker 3试验星及其天线

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图 4 技术挑战与关键技术之间的关系图

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图 5 翼阵一体天线设计思路

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图 6 一体化阵面剖面示意图

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图 7 任务完成时间随总任务数量变化关系

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图 8 随机接入检测性能仿真图

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图 9 下行PSS信号检测性能仿真图

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图 10 固定区域波束与点波束结合的随遇接入示意图

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图 11 金属边框环形天线方向图

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参考文献(22)

[1]	GIORDANI M and ZORZI M. Non-terrestrial networks in the 6G era: Challenges and opportunities[J]. IEEE Network, 2021, 35(2): 244–251. doi: 10.1109/MNET.011.2000493.
[2]	栾宁, 熊轲, 张煜, 等. 6G: 典型应用、关键技术与面临挑战[J]. 物联网学报, 2022, 6(1): 29–43. doi: 10.11959/j.issn.2096−3750.2022.00253. LUAN Ning, XIONG Ke, ZHANG Yu, et al. 6G: Typical applications, key technologies and challenges[J]. Chinese Journal on Internet of Things, 2022, 6(1): 29–43. doi: 10.11959/j.issn.2096-3750.2022.00253. doi: 10.11959/j.issn.2096−3750.2022.00253.
[3]	赛迪智库无线电管理研究所. 6G概念及愿景白皮书[EB/OL]. http://report.ccidgroup.com/viewPdf/d418285d51a047a9ae03fef21128bf9d, 2023.
[4]	HE Yuanzhi, LI Yuan, and YIN Hao. Co-frequency interference analysis and avoidance between NGSO constellations: Challenges, techniques, and trends[J]. China Communications, 2023, 20(7): 1–14. doi: 10.23919/JCC.fa.2022-0865.202307.
[5]	EULER S, FU Xiaotian, HELLSTEN S, et al. Using 3GPP technology for satellite communication[J]. Ericsson Technology Review, 2023, 2023(6): 2–12. doi: 10.23919/ETR.2023.10173867.
[6]	蓝天翼. “手机直连卫星”的发展与挑战[J]. 国际太空, 2023(3): 58–62. doi: 10.3969/j.issn.1009-2366.2023.03.012. LAN Tianyi. The development and challenges of "mobile direct connection to satellite"[J]. Space International, 2023(3): 58–62. doi: 10.3969/j.issn.1009-2366.2023.03.012.
[7]	NSR, finally, spacex joining the direct satellite-to-device race[EB/OL].https://www.nsr.com/finally-spacex-joining-the-direct-satellite-to-device-race, 2023.
[8]	HOSSEINIAN M, CHOI J P, CHANG S H, et al. Review of 5G NTN standards development and technical challenges for satellite integration with the 5G network[J]. IEEE Aerospace and Electronic Systems Magazine, 2021, 36(8): 22–31. doi: 10.1109/MAES.2021.3072690.
[9]	ARANITI G, IERA A, PIZZI S, et al. Toward 6G non-terrestrial networks[J]. IEEE Network, 2022, 36(1): 113–120. doi: 10.1109/MNET.011.2100191.
[10]	ITU-R. Radio regulations[R]. Geneva, 2020.
[11]	孙耀华, 彭木根. 面向手机直连的低轨卫星通信: 关键技术、发展现状与未来展望[J]. 电信科学, 2023, 39(2): 25–36. doi: 10.11959/j.issn.1000-0801.2023031. SUN Yaohua and PENG Mugen. Low earth orbit satellite communication supporting direct connection with mobile phones: Key technologies, recent progress and future directions[J]. Telecommunications Science, 2023, 39(2): 25–36. doi: 10.11959/j.issn.1000-0801.2023031.
[12]	SHI Jia, HU Junfan, YUE Yang, et al. Outage probability for OTFS based downlink LEO satellite communication[J]. IEEE Transactions on Vehicular Technology, 2022, 71(3): 3355–3360. doi: 10.1109/TVT.2022.3144466.
[13]	何元智, 彭聪, 于季弘, 等. 面向密集多波束组网的卫星通信系统资源调度算法[J]. 通信学报, 2021, 42(4): 109–118. doi: 10.11959/j.issn.1000-436x.2021102. HE Yuanzhi, PENG Cong, YU Jihong, et al. Resource scheduling algorithm of satellite communication system for future multi-beam dense networking[J]. Journal on Communications, 2021, 42(4): 109–118. doi: 10.11959/j.issn.1000-436x.2021102.
[14]	WANG Wenjin, CHEN Tingting, DING Rui, et al. Location-based timing advance estimation for 5G integrated LEO satellite communications[J]. IEEE Transactions on Vehicular Technology, 2021, 70(6): 6002–6017. doi: 10.1109/TVT.2021.3079936.
[15]	ZHEN Li, QIN Hao, SONG Bin, et al. Random access preamble design and detection for mobile satellite communication systems[J]. IEEE Journal on Selected Areas in Communications, 2018, 36(2): 280–291. doi: 10.1109/JSAC.2018.2804138.
[16]	朱剑锋, 孙耀华, 彭木根. 低轨卫星通信系统的前导序列设计[J]. 北京邮电大学学报, 2022, 45(6): 75–81. doi: 10.13190/j.jbupt.2022-163. ZHU Jianfeng, SUN Yaohua, and PENG Mugen. Preamble design for low earth orbit communication systems[J]. Journal of Beijing University of Posts and Telecommunications, 2022, 45(6): 75–81. doi: 10.13190/j.jbupt.2022-163.
[17]	KRISHNAMURTHY V, ATHAUDAGE C R N, and HUANG Dawei. Adaptive OFDM synchronization algorithms based on discrete stochastic approximation[J]. IEEE Transactions on Signal Processing, 2005, 53(4): 1561–1574. doi: 10.1109/TSP.2005.843710.
[18]	HUANG Miaona, CHEN Jun, and FENG Suili. Synchronization for OFDM-based satellite communication system[J]. IEEE Transactions on Vehicular Technology, 2021, 70(6): 5693–5702. doi: 10.1109/TVT.2021.3069580.
[19]	MORELLI M and MORETTI M. A robust maximum likelihood scheme for PSS detection and integer frequency offset recovery in LTE systems[J]. IEEE Transactions on Wireless Communications, 2016, 15(2): 1353–1363. doi: 10.1109/TWC.2015.2489206.
[20]	WANG Jiawei, JIANG Chunxiao, KUANG Linling, et al. Iterative Doppler frequency offset estimation in satellite high-mobility communications[J]. IEEE Journal on Selected Areas in Communications, 2020, 38(12): 2875–2888. doi: 10.1109/JSAC.2020.3005497.
[21]	ROBERTS L G. ALOHA packet system with and without slots and capture[J]. ACM SIGCOMM Computer Communication Review, 1975, 5(2): 28–42. doi: 10.1145/1024916.1024920.
[22]	LIVA G. Graph-based analysis and optimization of contention resolution diversity slotted ALOHA[J]. IEEE Transactions on Communications, 2011, 59(2): 477–487. doi: 10.1109/TCOMM.2010.120710.100054.