Enhancing Bidirectional Modbus TCP ↔ RTU Gateway Performance: A UDP Mechanism and Markov Chain Approach

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Detalles Bibliográficos
Publicado en:	Sensors vol. 25, no. 13 (2025), p. 3861-3888
Autor Principal:	Zhao, Shuang
Outros autores:	Zhang, Qinghai, Zhao Qingjian, Zhang, Xiaoqian, Guo, Yang, Lu Shilei, Song, Liqiang, Zhao Zhengxu
Publicado:	MDPI AG
Materias:	Distributed control systems Software Control algorithms Interoperability Automation Ethernet Protocol Communication Data transmission Internet of Things Product design Sensors Markov analysis
Acceso en liña:	Citation/Abstract Full Text + Graphics Full Text - PDF
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Descripción
Resumo:	In the Industrial Internet of Things (IIoT) field, the diversity of devices and protocols leads to interconnection challenges. Conventional Modbus Transmission Control Protocol (TCP) to Remote Terminal Unit (RTU) gateways suffer from high overhead and latency of the TCP protocol stack. To enhance real-time communication while ensuring reliability, this study applies Markov chain theory to analyze User Datagram Protocol (UDP) transmission characteristics. An Advanced UDP (AUDP) protocol is proposed by integrating a Cyclic Redundancy Check (CRC) check mechanism, retransmission mechanism, Transaction ID matching mechanism, and exponential backoff mechanism at the UDP application layer. Based on AUDP, a Modbus AUDP-RTU gateway is designed with a lightweight architecture to achieve bidirectional conversion between Modbus AUDP and Modbus RTU. Experimental validation and Markov chain-based modeling demonstrate that the proposed gateway significantly reduces communication latency compared to Modbus TCP-RTU and exhibits higher reliability than Modbus UDP-RTU.
ISSN:	1424-8220
DOI:	10.3390/s25133861
Fonte:	Health & Medical Collection