工业5G的非授权频段多优先级动态接入方法  

A Dynamic Multi-priority Access Method for Industrial 5G in Unlicensed Bands

作　　者：王秀莲 朱建 张蕾 许驰[2,3,4] 金曦[2,3,4] 夏长清[2,3,4] WANG Xiulian;ZHU Jian;ZHANG Lei;XU Chi;JIN Xi;XIA Changqing(College of Automation and Electrical Engineering,Shenyang Ligong University,Shenyang 110159,China;Key Laboratory of Networked Control Systems,Chinese Academy of Sciences,Shenyang 110016,China;Shenyang Institute of Automation,Chinese Academy of Sciences,Shenyang 110169,China;Institutes for Robotics&Intelligent Manufacturing,Chinese Academy of Sciences,Shenyang 110169,China;Unit 93010 of the PLA,Shenyang 110015,China)

机构地区：[1]沈阳理工大学自动化与电气工程学院,沈阳110159 [2]中国科学院网络化控制系统重点实验室,沈阳110016 [3]中国科学院沈阳自动化研究所,沈阳110169 [4]中国科学院机器人与智能制造创新研究院,沈阳110169 [5]中国人民解放军93010部队,沈阳110015

出　　处：《电讯技术》2024年第10期1691-1697,共7页Telecommunication Engineering

基　　金：国家自然科学基金资助项目(62173322,92267108,62133014,61972389);辽宁省科学技术计划(2023JH3/10200004,2023JH3/10200006,2022JH25/10100005)。

摘　　要：为实现工业5G在非授权频段的高实时、高可靠无线通信,提出了一种多优先级的动态信道接入方法,以满足异构工业任务的按需通信。该方法通过对多种无线网络共享的非授权频段进行实时信道监听,可以根据信道占用率动态切换信道接入方式,包括随机接入和确定性接入。其中,根据异构工业任务的实时性要求,定义了多种接入优先级,并确定合适的竞争和退避时间窗口。仿真结果表明,在工业多设备接入场景下,所提方法的信道传输可靠性达到99.99%,并且实时性比WiFi的载波侦听多路接入/碰撞避免机制(Carrier Sense Multiple Access with Collision Avoidance,CSMA/CA)和授权辅助接入(Licensed Assisted Access,LAA)的先听后说(Listen before Talk,LBT)机制分别提升了24.7%和46.3%。To achieve high real-time and reliable wireless communication in unlicensed bands for industrial 5G,a dynamic multi-priority channel access method is proposed to meet on-demand communication for heterogeneous industrial tasks.The method allows dynamic switching of channel access methods,including random access and deterministic access,according to channel occupancy by real-time channel listening to unlicensed bands shared by multiple wireless networks.Among them,multiple access priorities are defined based on the real-time requirements of heterogeneous industrial tasks,and suitable competition and receding time windows are determined.The simulation results indicate that,in an industrial multi-device access scenario,the proposed method achieves a channel transmission reliability of 99.99%.Moreover,its real-time performance is significantly better than that of the Carrier Sense Multiple Access with Collision Avoidance(CSMA/CA)mechanism of WiFi and the Listen Before Talk(LBT)mechanism of Licensed Assisted Access(LAA),with improvements of 24.7%and 46.3%respectively.

关 键 词：工业5G 非授权频段 多优先级信道接入 先听后说(LBT) 

分 类 号：TN92[电子电信—通信与信息系统]