Purpose. The development of the Industrial Internet of Things (IIoT) within the framework of the “Industry 4.0” paradigm is accompanied by an increase in the number of connected devices, growing demands for data transmission rate, and stringent latency constraints. In real-time control systems, even millisecond-level delays may lead to desynchronization of robotic mechanisms, production line interruptions, and economic losses. Widely used transport protocols, TCP and UDP, exhibit significant limitations: the former provides reliability at the cost of increased latency and overhead, while the latter ensures minimal delay without delivery control, which is critical for industrial processes. The purpose of this paper is to perform a comparative analysis of TCP, UDP, and QUIC transport protocols under conditions close to industrial scenarios and to evaluate their applicability for robotic control and reliable IIoT communications. Methods. Network analysis was conducted using the Wireshark packet analyzer and a custom-developed Python-based software complex incorporating the pyshark and matplotlib libraries. The study included PCAP file analysis, construction of time series, calculation of key metrics (command transmission rate, packet loss ratio, and command series size b), and their visualization. The elements of novelty consist in the comprehensive comparison of three transport protocols in the context of robotic manipulator control, where millisecond-level delays are critical; the application of QUIC, a relatively new protocol not previously examined in applied IIoT scenarios; and the development of a software tool enabling automated traffic analysis and classification in industrial environments. Results. Experimental results show that TCP provides zero packet loss but an unacceptably low command rate (0.58 commands/s). UDP achieves an order-of-magnitude higher rate (5.8 commands/s) but suffers from 3.88 % packet loss, rendering it unsuitable for high-precision operations. QUIC demonstrates the best performance: 18.16 commands/s with less than 1 % packet loss and a threefold increase in the average command series size b. Theoretical relevance. The obtained results confirm the prospects of using the QUIC protocol in IIoT industrial networks. Its adoption ensures minimal latency and high transmission reliability while significantly reducing network load through stream multiplexing. Practical implementation may involve integration of QUIC into robotic control systems, sensor networks, and production lines, aligning with the requirements for scalable and secure next-generation communications.

Industrial Internet of Things, transport protocol, TCP, UDP, QUIC, industrial robotics, latency, data transmission reliability, network efficiency

Belov M. A., Kuzmina E. A., Filina N. R., Muthanna A. S. A. Analysis of Communication Protocols for Industrial Robot Control Systems // Telecom IT. 2026. Vol. 14. Iss. 1. PP. 35‒56. (in Russian). DOI: 10.31854/2307-1303-2026-14-1-35-56. EDN: YKGWDF

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