Space-Air-Ground Integrated Network (SAGIN) for 6G: Requirements, Architecture and Challenges  

作　　者：Huanxi Cui Jun Zhang Yuhui Geng Zhenyu Xiao Tao Sun Ning Zhang Jiajia Liu Qihui Wu Xianbin Cao 

机构地区：[1]School of Electronic and Information Engineering,Beijing Key Laboratory for Network-Based Cooperative Air application Management,Beihang University,Beijing 100191,China [2]Advanced Research Institute of Multidisciplinary Science,Beijing Institute of Technology,Beijing 100081,China [3]China Mobile Research Institute,Beijing 100053,China [4]Department of Electrical and Computer Engineering,University of Windsor,ON,Canada,N9B 3P4 [5]National Engineering Laboratory for Integrated Aero-Space-Ground-Ocean Big Data Application Technology,the School of Cybersecurity,Northwestern Polytechnical University,Xi’an,Shaanxi,710072,China [6]College of Electronics and Information Engineering,Nanjing University of Aeronautics and Astronautics,Nanjing 210007,China

出　　处：《China Communications》2022年第2期90-108,共19页中国通信（英文版）

基　　金：supported in part by the National Key Research and Development Program under grant number 2020YFB1806800;the Beijing Natural Science Foundation under grant number L212003;the National Natural Science Foundation of China(NSFC)under grant numbers 62171010 and 61827901.

摘　　要：As the fifth-generation(5G)mobile communication network may not meet the requirements of emerging technologies and applications,including ubiquitous coverage,industrial internet of things(IIoT),ubiquitous artificial intelligence(AI),digital twins(DT),etc.,this paper aims to explore a novel space-air-ground integrated network(SAGIN)architecture to support these new requirements for the sixth-generation(6G)mobile communication network in a flexible,low-latency and efficient manner.Specifically,we first review the evolution of the mobile communication network,followed by the application and technology requirements of 6G.Then the current 5G non-terrestrial network(NTN)architecture in supporting the new requirements is deeply analyzed.After that,we proposes a new flexible,low-latency and flat SAGIN architecture,and presents corresponding use cases.Finally,the future research directions are discussed.

关 键 词：6G AI DT SAGIN NTN Network architecture 

分 类 号：TN929.5[电子电信—通信与信息系统]