uRLLC业务时延分析及低时延网络部署探讨  

Analysis of Latency of uRLLC Service and discussion of Low Latency Network Deployment

作　　者：张斌[1] 张鹏[2] 薛超粤 Zhang Bin;Zhang Peng;Xue Chaoyue(China Information Technology Designing&Consulting Institute Co.,Ltd.,Beijing 100048,China;China United Network Communications Group Co.,Ltd.,Beijing 100033,China)

机构地区：[1]中讯邮电咨询设计院有限公司,北京100048 [2]中国联合网络通信集团有限公司,北京100033

出　　处：《邮电设计技术》2022年第5期37-41,共5页Designing Techniques of Posts and Telecommunications

摘　　要：uRLLC技术因低时延、高可靠的特性,广泛应用于工业控制、自动驾驶、车联网等场景。为了降低空口时延,3GPP在R15及R16标准中,从优化调度和减少时间间隔等方面提出了一系列的增强技术。这些低时延技术可以不同程度地降低5G网络的空口时延,但是都无法克服TDD制式的等待时延,相对应的FDD制式在低时延方面具有天然的优势。在实际网络中,除了空口时延,影响用户端到端时延的因素还有传输时延及业务平台时延等方面,因此,打造低时延网络是一个系统性工程。Due to the characteristics of low latency and high reliability,uRLLC technology is widely used in industrial control,automatic driving,vehicle networking and other scenarios.In order to reduce the air interface delay,3GPP proposes a series of enhancement technologies in R15 and R16 standards,such as optimizing scheduling and reducing waiting time interval.These low latency technologies can reduce the air interface delay of 5G network in varying degrees,but they can not overcome the waiting delay of TDD system.On the contrary,the FDD system has a natural advantage in low delay.In the actual network,except the air interface delay,the factors that affect the user end-to-end delay are transmission delay and service platform delay.Therefore,building a low latency network is a systematic project.

关 键 词：低时延 高可靠性 上行免调度 下行抢占 

分 类 号：TN929.5[电子电信—通信与信息系统]