Automated system for data transmission characteristics management in the industrial Internet of Things networks

The purpose of the proposed study is to provide the required data transmission characteristics in the Industrial Internet of Things (IIoT) system. Our efforts are primarily aimed at increasing the probability of message delivery, as well as reducing the likelihood of their duplication in wireless networks based on the Message Queuing Telemetry Transport (MQTT) protocol. The article offers a scheme and description of the automated control system, which is based on the use of original models to assess the probability of delivery and the likelihood of duplicate messages. The control parameters are the quality of service (QoS) level and the number of allowed retransmissions (Nretry). Conducting computational experiments and deploying the system in a real environment have shown that its application makes it possible to improve the requirements for the probability of message delivery by 7.2 percent and the probability of their duplication by 8.6 percent compared to existing adaptive QoS approaches. Due to the results achieved, the proposed system is recommended for use in IIoT networks, which place increased demands on the reliability of data delivery.