空天地一体化网络研究现状与新技术的应用展望

doi:10.11959/j.issn.2096-8930.2021039

Abstract

Abstract:

To achieve the demand of all-time all-area coverage of wireless communications, space-air-ground integrated network (SAGIN) is important systematic development direction with global coverage, optional reception, and proportional demand service, which deeply integrate the satellite-based network, aerial-based network, and terrestrial-based network to break down the systematic barriers of each network and give full play to the functions of diff erent network dimensions.The development process of the SAGIN from the aspects of policy orientation, academic innovation, standards and norms were discussed.At the same time, the applications of the new emerged technology in the SAGIN were prospected, and the possible development direction of the SAGIN in the future was discussed.

Key words: space-air-ground integrated network, cooperative transmission technology, cognitive radio, non-orthogonal multiplex access, content delivery network

CLC Number:

TP393

Xiaokai ZHANG, Daoxing GUO, Bangning ZHANG. Research Status of Space-air-ground Integrated Network and Application Prospects of New Technologies[J]. Space-Integrated-Ground Information Networks, 2021, 2(4): 19-26.

Figures/Tables 3

References 70

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组织	标准号	研究内容
	3GPP TR 38.913^[57]	开发下一代接入技术的部署场景和需求，将卫星网络作为地基网络扩展的场景
	3GPP TS 22.261^[58]	卫星接入技术被纳入5G网络的基本接入技术之一
3GPP	3GPP TR 22.891^[59]	在使用卫星进行 5G 网络连接的场景下，指出当前地基网络技术需要进一步提升以实现全球无缝覆盖、时延不超过275 ms的空中接口以及地面与卫星网络之间的无缝切换
	3GPP TR 23.799^[60]	卫星集成到5G 网络架构中，可实现高效的路径重选，并以最小的服务中断支持服务的连续性
	3GPP TR 38.811^[61]	支持NTN的新无线研究项目，研究考虑并比较了卫星网络、空中接入网以及地面蜂窝网络的架构原理和信道模型差异
	3GPP TR 22.822^[62]	在5G卫星网络的架构下确定了未来以及现有的服务在设置、配置和维护方面的需求以及卫星和地基网络之间切换的监管问题
	ETSI TR 103 124^[63]	卫星网络和地基网络场景的定义和分类
	ETSI TR 103 263^[64]	将CR技术在遵守规定的前提下引入卫星通信，并强调了在Ka频段的使用场景
ETSI	ETSI TR 103 293^[65]	卫星网络作为回程链路，解决了无线接入网中的流量分配问题
	ETSI TR 103 351^[66]	提出卫星和地基网络融合的典型场景
	ETSI TS 102 357^[67]	提出利用卫星构建独立服务接入点，并规范了物理空中接口
DVB	DVB-S2X^[68]	将卫星视为向地面提供数字电视和 IP 服务的广播者
CCSDS	CCSDS标准体系^[69]	根据空间通信特点制定的空间卫星通信协议标准
ECPTA	ECC report 280^[70]	提出5G集成网络中基于卫星的几种典型用例

Research Status of Space-air-ground Integrated Network and Application Prospects of New Technologies

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