摘要
5G非地面网络(non-terrestrial network,NTN)技术是5G通信系统面向卫星通信和低空通信等新应用场景的重要技术,标志着5G技术应用从陆地通信走向了空间通信。首先分析了5G NTN和地面5G的差异点,包括网络架构、时频同步、HARQ和移动性管理等。进而介绍了3GPP Release 17的5G NTN标准进展及关键技术点与3GPP Release 18的5G NTN增强技术。最后展望了未来空、天、地一体化的技术演进。通过对5G NTN技术研究和标准分析,明确了5G和卫星通信融合的技术路线,并为后续6G空、天、地融合系统研究和设计提供基础。
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.Standar-dization 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.
作者
缪德山
柴丽
孙建成
柯颋
刘玉真
徐晓东
胡南
陈山枝
MIAO Deshan;CHAI Li;SUN Jiancheng;KE Ting;LIU Yuzhen;XU Xiaodong;HU Nan;CHEN Shanzhi(CICT Mobile Communications Technology Co.,Ltd.,Beijing 100083,China;State Key Laboratory of Wireless Mobile Communications,China Academy of Telecommunications Technology(CATT),Beijing 100191,China;China Mobile Research Institute,Beijing 100053,China)
出处
《电信科学》
2022年第3期10-21,共12页
Telecommunications Science
基金
国家重点研发计划项目(No.2020YFB1807900)。
