面向工业自动化的5G与TSN协同关键技术

面向工业制造领域数字化、网络化及智能化转型需求，简要介绍了时间敏感网络的起源及发展现状，并针对第三代合作伙伴计划(3GPP)中5G支持TSN的标准研究进行了阐述，重点针对5G与TSN协同面临的技术挑战进行了分析，进一步阐述两种异构网络间协同所需的时间同步、连接增强及统一资源管理等关键技术，最后给出5G-TSN协同网络在智能工厂中的应用场景，旨在深化推动5G融入工业控制领域，实现5G先进信息通信技术与工业应用的深入融合。 

Key technologies to enable 5G and TSN coordination for industrial automation

Applying fifth-generation mobile communication networks (5G) and time-sensitive networking (TSN) has become a new trend in industrial automation. As the new generation of mobile communication technology, 5G is featured with a large bandwidth, low latency, ultrareliable connection, and multiservice slicing capacities. As the evolution goal of industrial ethernet, TSN is featured with a deterministic transmission with bounded latency and jitter and guaranteed high reliability. Both technologies have been designed to provide converged communication for various services on common network infrastructure. 5G and TSN coordination can effectively promote the integration of Information Technology (IT) and operational technologies (OT), which will be a key enabler of the industrial internet. Therefore, the collaborative transmission of 5G and TSN has become a focus for the industry and academe. “5G + TSN” is envisioned to be the basic communication network for future smart factories, which can integrate various field-level industrial communication technologies and ensure end-to-end industrial data transmission reliability. However, 5G and TSN networks are different in the transmission methods, protocols, control and management mechanisms, etc. How to realize an efficient interconnection and coordination of 5G and TSN is a hot topic and difficult task currently. Following the general requirements of digital, digital-networked, and new-generation intelligent manufacturing, this article first introduced the state-of-the-art of time-sensitive networks, and it also elaborated on the standardization progress of 5G supporting TSN in 3GPP. This work then emphasized the main challenges for the coordinated transmission of 5G and TSN networks and analyzed key technologies such as time synchronization, connection enhancement, and unified resource management to support the coordination of 5G and TSN heterogeneous networks. Finally, the application scenarios of “5G + TSN” in a smart factory were given, aiming to deepen the integration of 5G into industrial control and flourish 5G-based industrial applications.