面向垂直行业的超可靠低时延业务时延分析

Analysis of Latency Characteristics of URLLC Traffic for Vertical Industry

超可靠低时延业务(ultra-reliable and low-latency communication,URLLC)时延性能与5G系统的带宽资源、边缘速率、调度方式、以及天线数、载波频率、调制编码方案、帧结构等系统参数配置密切相关。针对垂直行业部署URLLC业务时的工程测算需求,建立了一种用于描述URLLC时延性能的通用模型。进一步地,提出一种包括分析URLLC数据传输流程中的时延组成、确定调制编码方案和计算最大传输次数等步骤的时延分析方法。最后,通过对5G NR数据传输过程的链路级仿真,分析了不同可靠性要求与系统参数配置下的URLLC时延分布特性。所提方法为分析URLLC业务性能与5G网络资源需求之间的定量关系提供了一种实用解决方案。

The performance of ultra-reliable and low-latency communication service latency is closely related to bandwidth resources,edge rate,scheduling mode,antenna number,carrier frequency,modulation and coding scheme,frame structure and other system parameters of 5G system.According to the engineering measurement requirements of deploying URLLC services in vertical industries,a general model for describing the latency performance of URLLC was established.Furthermore,a latency analysis method was proposed,which included analyzing the latency composition in the URLLC data transmission process,determining the modulation and coding scheme,and calculating the maximum transmission times.Finally,relying on the 5G NR link-level simulation platform independently developed by the project team,the characteristics of URLLC latency distribution under different reliability requirements and system parameter configurations were analyzed.The proposed method provides a practical solution for analyzing the quantitative relationship between the performance of URLLC service and the resource demand of 5G network.