5G NTN关键技术研究与演进展望

doi:10.11959/j.issn.1000-0801.2022056

Abstract

Abstract:

Non-terrestrial network (NTN) in 5G system is expected to provide communication services via near-earth space access and satellite access, which means 5G network has expanded its service area from land to space.Standardization status and key technolgies of 5G 3GPP Release 17 NTN were presented, including key differences compared 5G TN, especially in network architecture, time and frequency synchronization, HARQ, and mobility management etc.Moreover, the main candidate techniques in 3GPP Release 18 NTN and beyond were explored, aiming to outline a vision for NTN evolution.Based on the analysis of 5G NTN and its evolution, it was observed that the integration of TN and NTN would be an obvious technique trend, which paved a way to a unified system applied for space, land and sea.

Key words: NTN, propagation delay, mobility, coverage

CLC Number:

TP393

Deshan MIAO, Li CHAI, Jiancheng SUN, Ting KE, Yuzhen LIU, Xiaodong XU, Nan HU, Shanzhi CHEN. Key technologies and evolution of 5G non-terrestrial network[J]. Telecommunications Science, 2022, 38(3): 10-21.

Figures/Tables 9

References 15

[1]	陈山枝 . 关于低轨卫星通信的分析及我国的发展建议[J]. 电信科学, 2020,36(6): 1-13.
	CHEN SZ . Analysis of LEO satellite communication and suggestions for its development strategy in China[J]. Telecommunications Science, 2020,36(6): 1-13.
[2]	3GPP. Study on new radio (NR) to support non-terrestrial networks:TR 38.811 v15.0.0[R]. 2018.
[3]	3GPP. Solutions for NR to support non-terrestrial networks (NTN):TR 38.821 v16.0.0[R]. 2019.
[4]	CATT. UL time and frequency compensation for NTN:R1-2007855[R]. 2020.
[5]	THALES. Considerations on UL timing and frequency synchronization:R1-2009298[R]. 2020.
[6]	MediaTek,Eutelsat. UL time and frequency synchronisation for NR-NTN:R1-2008809[R]. 2020.
[7]	Ericsson. On basic assumptions and timing relationship enhancements for NTN:R1-2006464[R]. 2020.
[8]	CMCC. Enhancements on HARQ for NTN:R1-2008012[R]. 2020.
[9]	CMCC. Discussion on service continuity between NTN and TN:R2-2103702[R]. 2021.
[10]	CMCC. Report of[AT115-e][112][NTN]SMTC and gaps:R2-2109135[R]. 2021.
[11]	CATT. Views on the Objectives of 3GPP Rel-18 NR NTN WID:RP-213302[R]. 2021.
[12]	Qualcomm. Views on NTN evolution:RP-211943[R]. 2021.
[13]	RAN vice-chair (AT＆T),Thales. New WI:NR NTN (non-terrestrial networks) enhancements:RP-213690[R]. 2021.
[14]	CHEN S Z , LIANG Y C , SUN S H ,et al. Vision,requirements,and technology trend of 6G:how to tackle the challenges of system coverage,capacity,user data-rate and movement speed[J]. IEEE Wireless Communications, 2020,27(2): 218-228.
[15]	CHEN S Z , SUN S H , KANG S L . System integration of terrestrial mobile communication and satellite communication—the trends,challenges and key technologies in B5G and 6G[J]. China Communications, 2020,17(12): 156-171.

Metrics

Recommended 0

No Suggested Reading articles found!

平台	高度	轨道	典型覆盖
低轨道地球卫星（low earth orbit satellite，LEO)	300 ~1 500 km	绕地球转	100 ~ 1 000 km
中轨道地球卫星（middle earth orbit，MEO)	7 000 ~ 25 000 km		100 ~ 1 000 km
地球静止轨道卫星（geostationary earth orbit，GEO)	35 786 km	保持相对于给定地球点的	200 ~ 3 500 km
空中载体平台（包括HAPS（high altitude platform station）	8 ~ 50 km（HAPS 20 km）	仰角/方位角固定的站点	5 ~ 200 km
高轨道地球卫星（high elliptical orbit satellite，HEO)	400 ~ 50 000 km	以椭圆轨迹绕地球运行	200 ~ 3 500 km

Key technologies and evolution of 5G non-terrestrial network

RichHTML

PDF下载

Knowledge

Abstract

Cite this article

share this article

Figures/Tables 9

References 15

Related Articles 15

Metrics

Recommended 0

[1]	Guanghai LIU, Tian XIAO, Bei LI, Xinzhou CHENG, Yongbei XUE, Yi LI, Xiaomeng ZHU, Yuting ZHENG. Research on 5G service coverage capability before 4G carrier re-farming to 5G [J]. Telecommunications Science, 2023, 39(3): 115-123.
[2]	Shengwei CHEN, Fan LI, Guangping YANG, Jian ZHOU, Yu SU. Research and application of air-to-ground continuous coverage technology for air-space emergency communication system [J]. Telecommunications Science, 2022, 38(8): 54-64.
[3]	Ziren WANG, Yi LI. Micro-station sleeping algorithm based on coverage area priority in 5G network [J]. Telecommunications Science, 2022, 38(7): 88-95.
[4]	Wenfa YAN, Feng CHEN. Gigabit broadband all-optical indoor far-end coverage [J]. Telecommunications Science, 2022, 38(7): 157-165.
[5]	Jianxian LU, Jiqiu HUANG, Mingxing HU, Henghua LIN. An approach of LTE measurement report based 2.1 GHz and 3.5 GHz 5G SA coverage evaluation [J]. Telecommunications Science, 2022, 38(6): 131-142.
[6]	Xiaoyu CHANG, Weijia ZHANG, Xudong1 LI, Xiaonan ZHANG, Gang WANG, Gang JIA. Study on remote sensing satellites random access to internet constellation and on-orbit intelligent processing [J]. Telecommunications Science, 2022, 38(4): 59-69.
[7]	Yanbin ZHAO, Renning WANG, Peipei HU. Analysis on the coverage performance and networking scheme of an MEO constellation [J]. Telecommunications Science, 2022, 38(4): 70-76.
[8]	Xin TAO, Junqing WAN, Yifeng LI, Xisheng XU, Nanting QIAO, Bin XU. Research on simulation of 5G indoor distribution system based on ray tracing propagation model [J]. Telecommunications Science, 2022, 38(2): 111-118.
[9]	Lu LIU, Ruijie CHEN, Jia LI. Research on adaptive optimization of KNN-DBSCAN parameters based on MDT overlapping coverage data [J]. Telecommunications Science, 2022, 38(2): 119-129.
[10]	Yejiang ZHANG, Jie CHEN, Jian HU, Xiaokang YANG, Yun LU, Teng LIANG. A new method to improve 5G coverage of urban grid roads [J]. Telecommunications Science, 2022, 38(12): 94-102.
[11]	Dan YANG, Jing ZHANG, Peijin LV, Yun LU, Zhanchun YANG. 4G/5G low-cost wireless coverage scheme based on tapping the potential of existing networks [J]. Telecommunications Science, 2021, 37(9): 168-174.
[12]	Yuhua HU, Xinyan WANG, Bei LI. Research on uplink coverage enhancement of 5G network [J]. Telecommunications Science, 2021, 37(7): 134-141.
[13]	Huijie ZHAO, Xuezhi ZHANG, Dong XIE. Application scenarios and difficulties in network construction of digital mines in cement industry based on 5G [J]. Telecommunications Science, 2021, 37(7): 142-147.
[14]	Xiaowen WU, Xiang LING, Lidong ZHU, Zhenfeng JIAO, Jian CHENG, Bo YANG. Access and mobility management technologies for 6G satellite communications network [J]. Telecommunications Science, 2021, 37(6): 78-90.
[15]	Yanlei CHEN, Junxian MENG, Wei LIU, Xun WANG. Comparison and analysis about 5G indoor new coverage solutions [J]. Telecommunications Science, 2021, 37(4): 151-158.