Information Technologies and Computer Engineering

The article describes the developing of a mathematical model of a mission-critical computer system segment for analyzing the process of multimedia data transferring using 4G network. The architecture of the mission-critical computer system segment is described, as well as the features of multimedia data and control messages transmitting over the physical uplink and downlink channels of the 4G network. When developing the mathematical model of a wireless segment, the decomposition principle was applied. Using of the principle allows to analyze the characteristics of the system and improve the accuracy of simulation results. Also, queuing systems were used, as the most using mathematical device, to determine the network capacity. The paper analyzed the errors probability in the multimedia data transmission, depending on the size of the transmitted frame and the number of simultaneously connected mobile stations to the base station

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