Delay and Reliability Evaluation of Industrial Wireless LAN System

In this paper, an industrial wireless LAN including a Media Access Control (MAC) layer and a Physical (PHY) layer based on the industrial communication standard is described. The hardware implementation is processed on Software Defined Radio (SDR) platform which provides fast processing for the hardware and software co-design. The experimental results show that the proposed wireless system can control up to four motors with 500 us to 750 us per motor which has a lower transmission time compared to PROFINET wireless standard. On the other hand, the high reliability of this system is also considered in this paper. It is important to formulate the communication error rate because it takes a long time to verify by the simulation. We need to investigate a quantitative evaluation method from the formulation of the communication error rate and evaluate the reliability of the system. This paper shows the evaluation results that reliability can be guaranteed even after three years of operation by performing at least one re-transmission time of the system which is suitable to the industry wireless communication standard.