Tatiana Ivanovna Davydova[e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it. ]T. Davydova,

Ilya Victorovich Tkachev[e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it. ] I. Tkachev

Simulation Operation Model for Radio Equipment of Computer-aided Data-exchange System

The article describes a simulation model of radio-equipment operation for computer-aided data-exchange system created in order to evaluate influence of failure rate of radio-equipment devices and time for their recovery, on probability of uninterruptible data-exchange between computer-aided data-exchange systems of two ships during a long-time period. The model of the operation process of radio equipment is developed using a mathematical scheme of queueing system - Q-scheme. The model response is an evaluation of the probability of uninterruptible data-exchange between computer-aided data-exchange systems of two ships during a long-time period. The model factors are the following reliability parameters of each radio equipment: failure rate and recovery time. The article also gives a block-diagram of general algorithm of the radio-equipment operation process and block-diagrams of procedures to define and change states of radio-equipment devices simulated by queueing-system channels. The simulation model is at the level of software implementation. The result of the software implementation of the simulation model with values of the reliability parameters of radio-equipment devices, given by users, is an interval evaluation of probability of uninterruptible data-exchange between computer-aided data-exchange systems of two ships during a time period given by users. The required accuracy and adequacy of the evaluation are ensured by a required number of software iterations, calculated by the programme, with the same initial data. To evaluate the importance of factors (reliability parameters of radio-equipment devices), a variance analysis of each of them with response has been made. A combination of achievable factor values when response values becomes the largest, has been defined by a method of coordinate raising.

Simulation model, channel state, variance analysis, method of coordinate raising.