Modeling of a heterogeneous packet-switched data network as a queuing system with absolute priority and channel resource redundancy

The article deals with the solution of a timely and relevant scientific and technical problem of modeling the data transmission network of a system for monitoring the state of critical state facilities. The need to develop a new model of such a data transmission network is due to the introduction of means of dynamic multimodal authentication of the legitimacy and deviance of the person of critical objects. Such authentication tools for the data transmission network become new sources of incoming load with special properties. For highquality performance of the functions of monitoring a critical object, the article suggests a constructive approach to the development of a model of a heterogeneous packet-switched data transmission network, to which not only messages of traditional communication services, but also messages in a multimodal representation circulate. The protocol data blocks of multi-channel messages are small in size, but they must be transmitted to the management body of a critical object with high security re-quirements. In this regard, the object of modeling – a data transmission network with packet communication is represented as a queuing system with absolute priority and channel resource reservation. This approach avoids replacing more resource-intensive messages (traditional communication services) with less resource-intensive ones (messages in a multimodal representation) while meeting the quality of service requirements of both types of load. As a result of the simulation, expressions are obtained for calculating the quality of service indicators for incoming requests for messages of traditional communication services and messages in a multimodal representation. The proposed model, together with the existing models of queuing systems, will allow solving computational and research tasks to find rational design strategies for building data transmission networks with packet switching for monitoring critical state facilities.