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.
Delay Analysis of uRLLC Traffic Based on Semi-static Scheduling and Resource Competition
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.
wireless communication systemdelay analysisuRLLC trafficsemi-static schedulingNS3 simulation
万方数据
维普
