The text discusses a survey on the Industrial Internet of Things (IIoT) and its communication
protocols. The survey covers recent research initiatives in IIoT, including its architecture,
communication protocols, and frameworks. The primary aim of the survey is to examine the
various communication protocols used in IIoT and their applications. The concepts of IIoT,
IoT, and Industry 4.0 are compared in this analysis.
Various communication protocols used in IIoT, such as HTTP, MQTT, CoAP, XMPP, AMQP,
and MODBUS, are discussed. The study emphasizes the importance of ensuring dependability,
enhancing lifetime, and reducing delays in the implementation of these protocols. AMQP is
mentioned as a protocol primarily used for message transmission between two industries, while
others like MQTT and MODBUS TCP are widely used for application-to-application
interactions at an enterprise level. Security protocols like SSL and TLS are also mentioned in
the context of HTTP, MQTT, and MODBUS TCP.
Additionally, higher-level and extra protocols, such as multicast DNS (mDNS) for service
discovery and application protocols like CoAP, MQTT, and AMQP, are essential for
distributed computing activities and various IIoT application domains.
The implementation of protocols is analyzed based on network topology, computational
performance, and latency. The protocols are utilized in different scenarios across various
domains, depending on the applications and communication networks involved.
Overall, the survey aims to provide researchers with an understanding of the concept of IIoT
and the latest research efforts in this field, with a focus on communication protocols. The text
concludes by suggesting that future research could concentrate on IIoT applications and the
challenges they may face.