Operational readiness of an elementary fragment of the departmental digital telecommunication network DSNS.

Andrey Feshchenko

National University of Civil Defenсe of Ukraine

http://orcid.org/0000-0002-4869-6428

Alexander Zakora

National University of Civil Defenсe of Ukraine

http://orcid.org/0000-0001-9042-6838

Evgen Morshch

Department of Emergency Prevention of the SES

http://orcid.org/0000-0003-0131-2332

DOI: https://doi.org/10.52363/2524-0226-2023-37-4

Keywords: emergency, digital telecommunications network, reliability, operational availability, probability of failure-free operation

Аnnotation

The research goal of developing a probabilistic model of an elementary fragment of a departmental digital telecommunications network, which takes into account the influence of the redundancy structure and operational parameters of fail-safe and maintainability of its nodes and data transmission channels on its operational readiness coefficient, has been achieved in the work. Expressions of the coefficient of operational readiness of the probabilistic model of an elementary fragment of a digital telecommunication network after failures in emergency conditions were obtained and analyzed, and the relationship between the coefficient of readiness and operational parameters was established. It is indicated that the required coefficient of operational readiness of an elementary fragment of a digital telecommunication network is achieved not only by increasing the reliability of nodes, but also by choosing a redundancy structure and a mode of maintenance of equipment, which have not been determined before, therefore studies are made of the dependence of the coefficient of operational readiness of an elementary fragment of a departmental telecommunications network on standardized operating conditions parameters for structures without redundancy and with redundancy by statistical mathematical modeling. As a result of the research, it was established that in order to achieve the required operational readiness ratio while reducing the requirements for the reliability of the nodes of the elementary fragment of the departmental digital telecommunication network, it is sufficient to apply structurally separate two-fold redundancy of nodes in the presence of triple redundancy of data transmission channels. Research data are useful and important for predicting the operational readiness ratio when designing and planning the required mode of maintenance of nodes and data transmission channels of an elementary fragment of the departmental telecommunications network, depending on the ratio of the period of preventive work to the time spent on failure during operation.

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