专题:6G空间互联网面向手机直连的低轨卫星通信:关键技术、发展现状与未来展望孙耀华,彭木根(北京邮电大学网络与交换技术国家重点实验室,北京100876)摘要:为满足全时、全域通信需求,低轨卫星通信将成为6G的重要组成部分。通过对地面移动通信协议体制进行适应性改进,低轨卫星可为地面移动手机终端提供直连服务。介绍了面向手机直连的低轨卫星通信关键技术和商业项目发展现状,探讨了未来需解决的关键问题和潜在技术途径。关键词:低轨卫星通信;手机直连卫星;星地融合网络中图分类号:TP393文献标志码:Adoi:10.11959/j.issn.1000–0801.2023031Lowearthorbitsatellitecommunicationsupportingdirectconnectionwithmobilephones:keytechnologies,recentprogressandfuturedirectionsSUNYaohua,PENGMugenStateKeyLaboratoryofNetworkingandSwitchingTechnology,BeijingUniversityofPostsandTelecommunications,Beijing100876,ChinaAbstract:Inordertorealizeanytimeandanywherecommunication,lowearthorbit(LEO)satellitecommunicationbecomesakeycomponentin6G.Throughtheadaptiveenhancementofterrestrialmobilecommunicationprotocol,LEOsatellitescanprovidedirectconnectionservicesformobilephones.Therelatedkeytechnologiesandtherecentprogressofvariouscommercialprogramswereintroduced,andfutureissueswerealsoidentifiedtogetherwithpoten-tialtechnicalsolutions.Keywords:lowearthorbitsatellitecommunication,directconnectionbetweensatellitesandmobilephones,inte-gratedsatellite-terrestrialnetwork收稿日期:2023-01-15;修回日期:2023-02-11基金项目:国家重点研发计划项目(No.2022YFB2902600);北京市新一代信息通信技术创新项目(No.Z211100004421017);中国通信学会青年人才托举项目(No.2021QNRC001)FoundationItems:TheNationalKeyResearchandDevelopmentProgramofChina(No.2022YFB2902600),TheBeijingMunicipalScienceandTechnologyProject(No.Z211100004421017),TheYoungEliteScientistsSponsorshipProgrambyChinaInstituteofCom-munications(No.2021QNRC001)专题:6G空间互联网·26·0引言当前,5G已得到较大规模的部署与应用,各国正在争相开展6G技术的储备和研发工作。随着载荷平台、火箭发射等技术的突破,低地球轨道(lowearthorbit,LEO,以下简称低轨)卫星通信将在6G时代扮演重要角色[1-2]。相比...