非地面网络对5G NR随机接入的影响分析  

Impact analysis on random access of 5G NR to support non-terrestrial networks

作　　者：张建国 谢鹏 韩春娜 ZHANG Jian-guo;XIE Peng;HAN Chun-na(Huaxin Consulting Co.,Ltd.,Hangzhou 310052,China;Nokia Solutions and Networks System Technology Co.,Ltd.Zhejiang Branch,Hangzhou 310053,China)

机构地区：[1]华信咨询设计研究院有限公司,杭州310052 [2]诺基亚通信系统技术(北京)有限公司浙江分公司,杭州310053

出　　处：《电信工程技术与标准化》2022年第11期88-92,共5页Telecom Engineering Technics and Standardization

摘　　要：为了有效指导非地面网络随机接入信号的设计,本文阐述了非地面网络的网络架构、传播时延、差分时延和多普勒频移。通过定性和定量相结合的方法,从PRACH前导格式、随机接入响应窗口期和上行定时提前机制3个方面,分析了较大的传播时延和差分时延对5G NR随机接入的影响,并给出了相应的解决方案。5G NR随机接入信号的重新设计可以有效克服非地面网络较大的传播时延和差分时延,加快非地面网络的部署和应用。In order to effectively guide the designing of random access for NTN.This paper introduces NTN-based NG-RAN architectures,propagation delay,differential delay and doppler shift.Through qualitative and quantify method,this paper analyzes the impact on random access of 5G NR because of larger propagation delay and larger differential delay and offers corresponding solutions in terms of PRACH sequence and format,random access response window size and uplink timing advance mechanism.Redesign of 5G NR random access can overcome larger propagation delay and larger differential delay from NTN and accelerate the deployment and application of NTN.

关 键 词：非地面网络 随机接入 5G NR 传播时延 

分 类 号：TN929.5[电子电信—通信与信息系统]