Analysis of information transmission processes in multimode fiber-optic networks with a token-based access method

Objectives . The study sets out to develop and analyze a mathematical model for information transmission in multimode fiber-optic ring networks using a token-based access method to ensure efficient interaction between Internet of Things (IoT) devices. The work aims to evaluate the probabilistic and time-related characteristics, as well as the reliability and performance of the network infrastructure to optimize data transmission parameters, taking into account the specifics of IoT and the peculiarities of the fiber-optic medium. Methods . Reliability theory methods are used to assess the network’s resilience to failures and increase its operational efficiency, along with techniques from the theory of stochastic processes to model the dynamics of data transmission under varying loads and approaches from queueing theory to analyze traffic distribution and packet queue management. The Laplace–Stieltjes transform is applied to derive functional equations that describe the probabilistic and time-related data transmission characteristics, enabling precise mathematical modeling of network processes. Results . The information transmission processes occurring in multimode fiber-optic networks with token access in the context of IoT systems were studied. The temporal characteristics of packet transmission for different classes, including critical IoT device data, were analyzed. Conclusions . The results confirm that multimode fiber-optic media provide an efficient foundation for IoT infrastructure that offers both high throughput and fault tolerance. By incorporating reliability characteristics into the model, it was possible to account for the impact of fiber-optic medium and network node failures on performance. Optimizing the parameters of the token-based access method, including time intervals and token transmission policies, significantly improves overall network performance by reducing collision probability and increasing throughput. The developed mathematical model provides an effective tool for analyzing and designing local networks based on multimode fiberoptic technologies. This fact is especially important for networks serving critical infrastructure.