低轨卫星物联网体系架构及关键技术研究

doi:10.11959/j.issn.2096-8930.2021038

天地一体化信息网络 ›› 2021, Vol. 2 ›› Issue (4): 10-18.doi: 10.11959/j.issn.2096-8930.2021038

所属专题：专题：面向6G的天地一体化信息网络

• 专题：面向6G的天地一体化信息网络 • 上一篇下一篇

低轨卫星物联网体系架构及关键技术研究

丁晓进¹^,³, 洪涛²^,³, 刘锐²^,³, 彭文滔²^,³, 张更新²^,³

¹ 南京邮电大学物联网学院，江苏南京 210003
² 南京邮电大学通信与信息工程学院，江苏南京 210003
³ 南京邮电大学卫星通信研究所，江苏南京 210003

修回日期:2021-11-14 出版日期:2021-12-20 发布日期:2021-12-01
作者简介:丁晓进（1981-），男，南京邮电大学物联网学院副教授，主要研究方向为空间信息网络、卫星物联网、频谱智能认知等
洪涛（1982-），男，南京邮电大学通信与信息工程学院副教授，主要研究方向为卫星通信、卫星物联网等
刘锐（1998-），男，南京邮电大学通信与信息工程学院硕士生，主要研究方向为卫星通信
彭文滔（1998-），男，南京邮电大学通信与信息工程学院硕士生，主要研究方向为卫星物联网
张更新（1967-），男，南京邮电大学通信与信息工程学院教授，主要研究方向为空间信息网络、卫星通信等
基金资助:
国家自然科学基金资助项目(62171234);国家自然科学基金资助项目(91738201);国家自然科学基金资助项目(61971440);国家自然科学基金资助项目(U21A20450);江苏省前沿引领技术基础研究专项(BK20192002)

Research on Architecture of LEO Satellite Internet of Things and Key Technologies

Xiaojin DING¹^,³, Tao HONG²^,³, Rui LIU²^,³, Wentao PENG²^,³, Gengxin ZHANG²^,³

¹ College of Internet of Things, Nanjing University of Post and Telecommunications, Nanjing 210003, China
² College of Telecommunications, Information Engineering, Nanjing University of Post and Telecommunications, Nanjing 210003, China
³ Satellite Communication Research Institute, Nanjing University of Post and Telecommunications, Nanjing 210003, China

Revised:2021-11-14 Online:2021-12-20 Published:2021-12-01
Supported by:
The National Natural Science Foundation of China(62171234);The National Natural Science Foundation of China(91738201);The National Natural Science Foundation of China(61971440);The National Natural Science Foundation of China(U21A20450);Jiangsu Province Basic Research Project(BK20192002)

摘要/Abstract

摘要：

首先分析低轨卫星物联网的系统组成和需求特征，并设计低轨卫星物联网的体系架构；其次，研究电磁和传播环境感知方法，通过构建神经网络模型智能提取电磁环境和信道特征；再次，探究活跃终端身份辨识方法，以检测异步接入活跃终端身份；最后，考虑多输入多输出技术作为地面移动通信系统提升容量的主要手段，探索两种卫星空间域资源挖掘算法，以实现低轨卫星物联网终端碰撞减缓和容量提升。仿真结果表明，所设计的空间域资源挖掘方法可有效减缓终端间信号碰撞，显著提升低轨卫星物联网终端并发接入容量。

关键词: 低轨卫星物联网, 活跃终端辨识, 空域资源挖掘, 碰撞减缓

Abstract:

First, we analyzed the composition and demand characteristics of LEO satellite IoTs, and designed an architecture of LEO satellite IoTs.Second, to extracted characteristics of electromagnetic environment and channel, we studied electromagnetic environment and channel sensing methods through constructing neural network model.Then, we investigated an active terminal-identifi cation method for detecting active terminals.Finally, considered multiple-input multiple-output as the main approach to improved the capacity of terrestrial mobile communication systems, we explored a pair of algorithms of mining satellite spatial resources for realizing the collision mitigation and capacity improvement of LEO IoT terminals.Simulation results showed that the designed method sofmining spatial-domain resources could mitigated eff ectively signal collisions among IoT terminals, and improved signifi cantly the concurrent accessing number of LEO satellite IoT terminals.

Key words: low earth orbit satellite internet of things, active terminal identifi cation, spatial resource mining, collision mitigation

中图分类号:

TP927

丁晓进, 洪涛, 刘锐, 彭文滔, 张更新. 低轨卫星物联网体系架构及关键技术研究[J]. 天地一体化信息网络, 2021, 2(4): 10-18.

Xiaojin DING, Tao HONG, Rui LIU, Wentao PENG, Gengxin ZHANG. Research on Architecture of LEO Satellite Internet of Things and Key Technologies[J]. Space-Integrated-Ground Information Networks, 2021, 2(4): 10-18.

图/表 11

图1

图2

图3

图4

图5

表1

图6

图7

图8

图9

图10

参考文献 24

[1]	吴巍, 张更新 . 天基物联网技术[M]. 北京: 电子工业出版社, 2021.
	WU W , ZHANG G X . Space-based IoT technology[M]. Beijing: Electronic Industry Press, 2021.
[2]	HARA T , . ORBCOMM low earth orbit mobile satellite communication system:us Armed Forces applications[C]// Proceedings of Proceedings of MILCOM '93 - IEEE Military Communications Conference. Piscataway:IEEE Press, 1993: 710-724.
[3]	PACHLER N , DEL P I , CRAWLEY E F ,et al. An updated comparison of four low earth orbit satellite constellation systems to provide global broadband[C]// Proceedings of 2021 IEEE International Conference on Communications Workshops (ICC Workshops). Piscataway:IEEE Press, 2021: 1-7.
[4]	CHAUDHRY A U , YANIKOMEROGLU H . Laser intersatellite links in a starlink constellation:a classification and analysis[J]. IEEE Vehicular Technology Magazine, 2021,16(2): 48-56.
[5]	ORDONEZ-LUCENA J , AMEIGEIRAS P , LOPEZ D ,et al. Network slicing for 5G with SDN/NFV:concepts,architectures,and challenges[J]. IEEE Communications Magazine, 2017,55(5): 80-87.
[6]	ZHU L P , ZHANG J , XIAO Z Y ,et al. Joint tx-rx beamforming and power allocation for 5G millimeter-wave non-orthogonal multiple access networks[J]. IEEE Transactions on Communications, 2019,67(7): 5114-5125.
[7]	YOU L , LI K X , WANG J H ,et al. Massive MIMO transmission for LEO satellite communications[J]. IEEE Journal on Selected Areas in Communications, 2020,38(8): 1851-1865.
[8]	JIA R D , CHEN X M , QI Q ,et al. Massive beam-division multiple access for B5G cellular Internet of Things[J]. IEEE Internet of Things Journal, 2020,7(3): 2386-2396.
[9]	DING Z G , ADACHI F , POOR H V . The application of MIMO to non-orthogonal multiple access[J]. IEEE Transactions on Wireless Communications, 2016,15(1): 537-552.
[10]	DE S M , CIANCA E , ARANITI G ,et al. Satellite communications supporting Internet of remote things[J]. IEEE Internet of Things Journal, 2016,3(1): 113-123.
[11]	WANG X D , XI B , SHI X Y ,et al. Cooperative beamforming aloha for asynchronous LEO satellite IoT networks[C]// Proceedings of 2020 IEEE Globecom Workshops (GC Wkshps). Piscataway:IEEE Press, 2020: 1-5.
[12]	LI P X , HE Y Z , CUI G F ,et al. Asynchronous cooperative aloha for multi-receiver satellite communication networks[J]. IEEE Communications Letters, 2017,21(6): 1321-1324.
[13]	NI T , DING X J , WANG Y F ,et al. Spectrum sensing via temporal convolutional network[J]. China Communications, 2021,18(9): 37-47.
[14]	JIA M , LIU X , GU X M ,et al. Joint cooperative spectrum sensing and channel selection optimization for satellite communication systems based on cognitive radio[J]. International Journal of Satellite Communications and Networking, 2017,35(2): 139-150.
[15]	KAY S . Fundamentals of statistical signal processing,volume II:Detection Theory[M]. Prentice Hall, 1998.
[16]	DING X J , FENG L J , ZOU Y L ,et al. Deep learning aided spectrum prediction for satellite communication systems[J]. IEEE Transactions on Vehicular Technology, 2020,69(12): 16314-16319.
[17]	张更新, 王运峰, 丁晓进 ,等. 卫星互联网若干关键技术研究[J]. 通信学报, 2021,42(8): 1-14.
	ZHANG G X , WANG Y F , DING X J ,et al. Research on several key technologies of satellite Internet[J]. Journal on Communications, 2021,42(8): 1-14.
[18]	WANG B C , DAI L L , ZHANG Y ,et al. Dynamic compressive sensing-based multi-user detection for uplink grant-free NOMA[J]. IEEE Communications Letters, 2016,20(11): 2320-2323.
[19]	AMOR S B , AFFES S , BELLILI F ,et al. Multi-node ML time and frequency synchronization for distributed MIMO-relay beamforming over time-varying flat-fading channels[J]. IEEE Transactions on Communications, 2019,67(4): 2702-2715.
[20]	ZARIFI K , SHAHBAZPANAHI S , GERSHMAN A B ,et al. Robust blind multiuser detection based on the worst-case performance optimization of the MMSE receiver[J]. IEEE Transactions on Signal Processing, 2005,53(1): 295-305.
[21]	LI J , XUE K P , LIU J Q ,et al. An ICN/SDN-based network architecture and effcient content retrieval for future satellite-terrestrial integrated networks[J]. IEEE Network, 2020,34(1): 188-195.
[22]	CHIEN W C , LAI C F , HOSSAIN M S ,et al. Heterogeneous space and terrestrial integrated networks for IoT:architecture and challenges[J]. IEEE Network, 2019,33(1): 15-21.
[23]	SHI Y P , CAO Y R , LIU J J ,et al. A cross-domain SDN architecture for multi-layered space-terrestrial integrated networks[J]. IEEE Network, 2019,33(1): 29-35.
[24]	GUO J M , YANG L , RINCóN D ,et al. SDN controller placement in LEO satellite networks based on dynamic topology[C]// Proceedings of 2021 IEEE/CIC International Conference on Communications in China (ICCC). Piscataway:IEEE Press, 2021: 1083-1088.

参数	参数值
划分区域	北纬26°～北纬38°、东经100°～东经115°
网格划分精度	纬度间隔2°、经度间隔2.5°
波束个数	4个
总节点数	20 000～30 000个
节点业务到达模型	服从Beta分布
产生新业务的时间	100个时隙
可用前导码个数	128个
前导码冲突的节点退避方式	均匀退避算法
退避窗口长度	50个时隙
时隙长度	16 ms

低轨卫星物联网体系架构及关键技术研究

Research on Architecture of LEO Satellite Internet of Things and Key Technologies

在线阅读

pdf下载

可视化

摘要/Abstract

引用本文

使用本文

图/表 11

参考文献 24

相关文章 1

Metrics

推荐阅读 0