Keywords: computer system, telecommunication network, synchronization, acousto-optic spectrum analyzer


Relevance of the study. To improve the quality of service (QoS), the work of all network technologies, protocols, and individual traffic management mechanisms is constantly optimized. It is known that the quality of information transmission in modern telecommunication equipment is affected by the quality of synchronization devices.  Synchronization is a means of maintaining the operation of all digital equipment in a data transmission network at one average speed, which must exist at three levels: bit synchronization, synchronization at the level of channel intervals (time slot) and frame synchronization. Therefore, the lack of synchronization of the computer system at the required level can lead to a significant decrease in QoS. At the same time, the requirements for ensuring these indicators are significantly tightened in the face of an increase in the load of network resources. Subject of study: computer system synchronization. The aim of the article is to develop a method for diagnosing synchronization disturbances in the telecommunications network of a computer system of critical application by increasing the resolution of an acousto-optical spectrum analyzer. Research results. The influence of non-stationary data transmission in the telecommunications subsystem of the computer system under study is analyzed. The analysis and classification of the causes of computer network synchronization failure of a critical application computer system is carried out. The article describes the consequences of a violation of computer network stabilization for ensuring the quality of service provided by various frequently used services. Proposed the use of acousto-optic spectrum analyzer with spatial integration for diagnostics of violations of the synchronization network. In work the analysis of the use of acousto-optic spectrum analyzers. The conducted research allowed us to obtain an analytical expression for the output signal of the spectroanalyzer when two rectangular pulses with different carrier frequencies, durations and delay times are received at its input. This result, as well as the numerical calculations provided, allowed us to develop General recommendations for increasing the resolution of the acousto-optical spectrum analyzer, and thus create theoretical prerequisites for improving the synchronization of the computer system. The given analytical relations and numerical estimates were experimentally verified by means of system simulation. Conclusions. As a result of the research, a method of diagnostics of synchronization violations in the telecommunications network of a computer system of critical application was proposed. The method is based on increasing the resolution of the measuring system based on an acoustooptic spectrum analyzer.


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Author Biographies

Vladimir Rudnytsky, Cherkasy State Technological University
Doctor of Sciences (Engineering), Professor, Head of the Department of Information Security and Computer Engineering
Mykhailo Mozhaiev, Kharkiv SRI examinations named dist. prof. N. S. Bokarius
PhD (Engineering Sciences), Head of the Laboratory on Speech and Audio Computer Engineering and Telecommunication
Nina Kuchuk, National Technical University "Kharkiv Polytechnic Institute"
PhD (Pedagogy Sciences), Associate Professor, Associate Professor of the Department of Computer Engineering and Programming


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