关键词: 工业物联网, 6TiSCH协议, IPv6协议, 低功耗, 时隙跳频（TSCH）

Abstract:

The Internet engineering task force (IETF) is developing an IPv6-based low-power industrial Internet of things (IIoT) protocol stack called 6TiSCH, which is mainly used in complex industrial process control and automation. The network layer of the protocol stack adopts an IPv6 protocol, enabling the massive Internet of things (IoT) nodes to seamlessly access the Internet. The link layer adopts IEEE802.15.4e TSCH protocol, which can enable low-power and highly reliable wireless mesh networks. The OpenWSN open source project provides a complete implementation of the protocol stack code. This paper systematically summarizes the standards, key technologies and platforms of the IETF 6TiSCH IIoT. First of all, this paper provides a detailed description of its development process and current situation. Next, this paper analyzes the CoAP application layer protocol, UDP transport layer protocol, IPv6 network layer protocol, IEEE802.15.4e link layer protocol and its physical layer standard protocol in turn. Furthermore, this paper summarizes its key technologies such as high-precision time synchronization, resource scheduling and security, and conducts an in-depth analysis of its implementation platform. Finally, a perspective of the future work in this research area is discussed.

Key words: industrial Internet of things, 6TiSCH protocols, IPv6 protocols, lower power, time synchronized channel hopping (TSCH)