卫星5G技术的发展和展望

doi:10.11959/j.issn.2096-8930.2021001

Abstract

Abstract:

With the development of new broadband satellite communication constellation, the fusion of satellite communication and 5G has become a hot spot in the communication industry.The current status of the development of satellite 5G was summarized, and the work achievements of 3GPP, ITU, SaT5G and other international standard development organizations were introduced.On the basis, the overall architecture of satellite 5G network was proposed, the research and development were introduced such as networking under the condition of satellite dynamic topology, multi band satellite ground integration waveform design, multiple access to satellite IoT terminal, radio resource management and interference coordination.In addition, the feasibility of new technologies such as OTFS, nonorthogonal multiple access and interference coordination of NGSO and GSO based on spectrum sensing were explored.Finally, the development of the 6G phase of integrated satellite and terrestrial networks was presented.

Key words: satellite 5G, architecture of network, waveform design, satellite non-orthogonal multiple access, radio resource management

CLC Number:

TN919.23

Lijun ZHAI, Shuming PAN, Chunting WANG. Development and Prospect of Satellite 5G Technology[J]. Space-Integrated-Ground Information Networks, 2021, 2(1): 1-10.

Figures/Tables 4

参数	场景1	场景2	场景3	场景4	场景5
轨道平台与高度	GEO（35 786 km）	GEO（35 786 km）	Non-GEO（最低600 km）	Non-GEO（最低600 km）	高度在8～50 km间的无人飞行系统
载波（平台—终端）	（Ka频段）上行：约30 GHz 下行：约20 GHz	（S频段）上/下行：约2 GHz	（S频段）上/下行：约2 GHz	（Ka频段）上行：约30 GHz 下行：约20 GHz	约6 GHz
波束模式	固定波束	固定波束	移动波束	固定波束	固定波束
双工模式	FDD	FDD	FDD	FDD	FDD
信道带宽（DL+UL）	最高2×800 MHz	最高2×20 MHz	最高2×20 MHz	最高2×800 MHz	最高2×80 MHz （移动用户）；最高2×1 800 MHz （固定用户）
非地面网络架构选择（参考表2）	A3	A1	A2	A4	A2
非地面网络终端类型	VSAT（固定或移动）	用户终端（3GPP class 3）	用户终端（3GPP class 3）	VSAT（固定或移动）	用户终端（3GPP class 3）和VSAT
非地面网络终端分布	100%室外	100%室外	100%室外	100%室外	室内和室外
非地面网络终端速度	最高可达1 000 km/h （例如飞机）	最高可达1 000 km/h （例如飞机）	最高可达1 000 km/h （例如飞机）	最高可达1 000 km/h （例如飞机）	最高可达500 km/h （例如高铁）
接入方式	GEO基于中继的间接接入	GEO的直接接入	Non-GEO的直接接入	Non-GEO基于中继的间接接入	支持3GPP移动用户的低时延服务（包含室内和室外）
支持用例	eMBB：多播、固定蜂窝连接、移动蜂窝连接、网络弹性、边缘网络传输、移动蜂窝混合连接、节点组播直连/广播	eMBB：区域公共安全、广域公共安全、移动广播直连、广域物联网服务	eMBB：区域公共安全、广域公共安全、广域物联网服务	eMBB：多归属、固定蜂窝连接、移动蜂窝连接、网络弹性、集群、移动蜂窝混合连接	eMBB：按需热点

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架构	NTN终端	航天器或高空平台搭载	NTN网关
A1:通过弯管卫星/空中平台为用户提供接入服务	用户终端	RRH	5G基站（gNB）
A2：通过搭载5G基站的卫星/空中平台为用户提供接入服务	用户终端	5G基站（gNB）或中继节点	连接核心网的路由
A3：通过弯管卫星/空中平台为中继节点提供接入服务	中继节点	RRH	5G基站（gNB）
A4：通过搭载5G基站的卫星/空中平台为中继节点提供接入服务	中继节点	5G基站（gNB）或中继节点	连接核心网的路由

Development and Prospect of Satellite 5G Technology

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