面向大规模物联网的随机接入：现状、挑战与机遇

范平志; 李里; 陈欢; 程高峰; 杨林杰; 汤小波

doi:10.11959/j.issn.1000-436x.2021098

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面向大规模物联网的随机接入：现状、挑战与机遇

专题：面向未来移动网络的大规模组网关键技术 | 更新时间：2024-06-05

- 面向大规模物联网的随机接入：现状、挑战与机遇
- Random access for massive Internet of things:current status, challenges and opportunities
- 通信学报 2021年42卷第4期页码：1-21
- 作者机构：
  
  西南交通大学信息科学与技术学院，四川成都 611756
- 作者简介：
  
  [ "范平志（1955- ），男，四川广汉人，博士，西南交通大学教授，主要研究方向为大规模物联网、高移动无线通信、信息理论与编码技术。" ]
  [ "李里（1983- ），男，四川成都人，博士，西南交通大学副教授、硕士生导师，主要研究方向为信道编译码技术、大规模随机接入技术等。" ]
  [ "陈欢（1995- ），女，浙江湖州人，西南交通大学硕士生，主要研究方向为大规模随机接入技术、群组通信技术。" ]
  [ "程高峰（1995- ），男，山西晋城人，西南交通大学硕士生，主要研究方向为大规模随机接入技术。" ]
  [ "杨林杰（1991- ），男，四川遂宁人，西南交通大学博士生，主要研究方向为大规模随机接入技术。" ]
  [ "汤小波（1992- ），男，四川达州人，西南交通大学博士生，主要研究方向为大规模随机接入技术、超奈奎斯特传输技术。" ]
- 基金信息：
  
  国家重点研发计划基金资助项目(2018YFB1801104);国家自然科学基金资助项目(62071394);四川省国际科技创新合作基金资助项目(2020YFH0011)
- DOI：10.11959/j.issn.1000-436x.2021098
  中图分类号： TN929.5
- 网络出版日期：2021-04，
  
  纸质出版日期：2021-04-25
- 稿件说明：
移动端阅览
范平志, 李里, 陈欢, 等. 面向大规模物联网的随机接入：现状、挑战与机遇[J]. 通信学报, 2021,42(4):1-21.

Pingzhi FAN, Li LI, Huan CHEN, et al. Random access for massive Internet of things:current status, challenges and opportunities[J]. Journal on communications, 2021, 42(4): 1-21.
范平志, 李里, 陈欢, 等. 面向大规模物联网的随机接入：现状、挑战与机遇[J]. 通信学报, 2021,42(4):1-21. DOI： 10.11959/j.issn.1000-436x.2021098.

Pingzhi FAN, Li LI, Huan CHEN, et al. Random access for massive Internet of things:current status, challenges and opportunities[J]. Journal on communications, 2021, 42(4): 1-21. DOI： 10.11959/j.issn.1000-436x.2021098.

摘要

在传统通信系统中，随机接入是终端与网络之间建立无线链路的必经过程，只有在随机接入完成之后，终端与网络之间才能正常进行数据传输。聚焦大规模节点物联网，首先阐述了大规模物联网随机接入的基本特征，分析了传统授权随机接入（RA）方法对于大规模物联网应用的局限性；然后从系统模型、协议框架、算法流程、系统性能等多个角度，讨论免授权RA、半免授权RA、无用户标识RA三大类新型大规模随机接入方法，分析各类方法优缺点，并指出面临的挑战与潜在的机遇；最后对大规模物联网随机接入涉及的关键技术与共性问题进行了总结。

Abstract

In conventional communication systems

the random access (RA) is a necessary procedure for a user equipment (UE) to establish wireless connection to the network before actual data transmission.Focusing on the massive IoT with large number of nodes

the fundamental characteristics and limitations of conventional grant-based RA were firstly discussed.Then

the grant-free RA

semi-grant-free RA and unsourced RA for massive IoT were addressed in details from multiple perspectives

including their system models

protocol frameworks

algorithm procedures

system performance

related pros and cons

as well as critical challenges and potential opportunities.Finally

some highlights on the related key techniques and common issues in random access for massive IoT were concluded.

关键词

Keywords

references

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