摘要： 5G标准定义了eMBB增强移动宽带、mMTC海量大连接、URLLC低时延高可靠三大应用场景。随着5G逐步成熟商用，URLLC业务作为垂直行业的重要切入点也在逐渐完善优化。首先介绍了URLLC技术标准演进情况，随后从低时延、高可靠和URLLC与eMBB复用三方面分别分析了实现URLLC的关键技术，最后将URLLC与TSN网络融合做了阐述。

中图分类号： TN929.5
文献标识码： A
DOI：10.16157/j.issn.0258-7998.200785
中文引用格式： 李皛，张志荣，陈建刚，等. 5G URLLC标准及关键技术研究[J].电子技术应用，2020，46(10)：14-19.
英文引用格式： Li Xiao，Zhang Zhirong，Chen Jiangang，et al. Research on 5G URLLC standard and key technologies[J]. Application of Electronic Technique，2020，46(10)：14-19.

Research on 5G URLLC standard and key technologies

Abstract： The ITU(International Telecommunication Union) defines three major 5G application scenarios: eMBB, mMTC and URLLC. With the maturity and commercialization of 5G, URLLC as an important entry point in the vertical industry is also gradually improving and optimizing. This paper firstly introduces the evolution of URLLC standard, and then analyzes the key technologies to achieve URLLC from three aspects of low latency, high reliability and multiplexing of URLLC and eMBB. Finally, the integration of URLLC and TSN is described.

Key words : URLLC；mini-slot；multiplexing；grant free；time sensitive networking(TSN)