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UDC 004.724

DATA CHANNEL MODEL WITH FAULT DETECTION AND DISASTER RECOVERY

V. P. Koryachko, PhD (technical sciences), full professor, Head of the Department, RSREU, Ryazan; This email address is being protected from spambots. You need JavaScript enabled to view it.
A. P. Shibanov, PhD (technical sciences), full professor, RSREU, Ryazan; This email address is being protected from spambots. You need JavaScript enabled to view it.
X. L. Fam, post-graduate student, RSREU, Ryazan; This email address is being protected from spambots. You need JavaScript enabled to view it.

The aim of the work is to find probability-time characteristics of packet transmission process in failure and recovery systems. Models of random graphs are used. We give a solution to the problem using equivalent reforms simplifying GERT-network structure. The model is used with an arbitrary number of loops of the first order and algorithms with polynomial computational complexity. Distributions of packet transmission time on the channel at different values of the probabilities of equipment failures and channel performance recovery operations are found. Channel characteristics treated as M/G/1queuing system are calculated. The values of the execution time of equipment recovery operations ensuring minimum permissible delays of transmission channel package are determined.

Key words: data network, GERT-network, a first order loop equivalent simplifying transformations, the density distribution of the output values GERT-network queuing system M/G/1, Little's formula.

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