An Efficient and Reliable I/O Mapping Protocol for Industrial Cyber-Physical Systems

With the advancement of Industry 4.0, industrial cyber-physical systems (ICPS) are expected to realize the digitalization and intelligence in smart factories, and lots of sensors and actuators will be deployed and networked together. However, limited bandwith resource and massive data volume make it difficult to meet the real-time and reliability requirement in the industrial network. To address these problems, an efficient and reliable Input/Output (I/O) mapping protocol is proposed to provide the quality of service. First, we establish an I/O mapping communication model for smart manufacturing and automation scenarios, in which devices communicate with each other by simply writing and reading the output and input area. In order to ensure the reliability of transmission, we introduce an optimized hand-shake mechanism with a small hand-shake overhead. Finally, to realize the real-time transmission with coexistance of large-scale sensor data and control data, a bandwidth reservation method is designed to alleviate interference from each other. Extensive evaluation results show that our proposed protocol performs well in terms of packet-loss rate and transmission delay, and the intuitive I/O communication interface can improve the efficiency of software development.