基于半静态调度与资源竞争的uRLLC业务时延分析  

Delay Analysis of uRLLC Traffic Based on Semi-static Scheduling and Resource Competition

作　　者：高月红[1] 王小琦 洪霄 宁智 贺佳 GAO Yuehong;WANG Xiaoqi;HONG Xiao;NING Zhi;HE Jia(School of Information and Communication Engineering,Beijing University of Posts and Telecommunications,Beijing 100876,China)

机构地区：[1]北京邮电大学信息与通信工程学院,北京100876

出　　处：《无线电工程》2024年第3期737-743,共7页Radio Engineering

摘　　要：超可靠低时延通信(ultra Reliable and Low Latency Communication,uRLLC)是未来移动通信中的一种重要应用场景,是工业自动化、智能交通和远程医疗等众多新兴领域的技术基础。重点研究了无线通信系统中uRLLC业务的上行时延。建立了uRLLC业务的上行无线传输系统模型;从初传时延与单次重传时延2个角度分别进行问题建模与业务流时延分析,初传数据包采用半静态调度,重传数据包采用资源竞争调度;推导获得了包含多次重传的uRLLC业务的时延上界以及对应的概率分布。在理论分析的基础上,开发了基于NS3的uRLLC业务传输仿真平台,获得了uRLLC业务时延的仿真结果,并将其与时延上界理论计算结果对比,验证了时延上界理论分析的准确性。ultra Reliable and Low Latency Communication(uRLLC)is an important scenario in the next generation wireless communication networks,serving as the foundation for numerous emerging fields such as industrial automation,intelligent transportation,and remote healthcare.The uplink latency of uRLLC traffic over a wireless communication network is studied.An uplink wireless communication system model for uRLLC is established.The latency of the uRLLC traffic flow is modeled and analyzed in terms of initial transmission latency and single retransmission latency respectively,where semi-static scheduling is utilized for initial transmission traffic packets and resource competition scheduling is utilized for retransmission traffic packets.Finally,the upper bound of the wireless transmission latency of uRLLC traffic and its corresponding probability distribution are provided,including multiple retransmissions.In addition,a wireless communication simulation system based on NS3 is developed to obtain the simulation results of the uRLLC traffic latency.The derived upper bound of the latency is verified by comparing the simulation results with the theoretical analysis results.

关 键 词：无线通信系统 时延分析 超可靠低时延通信业务 半静态调度 NS3仿真 

分 类 号：TN929.5[电子电信—通信与信息系统]