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Vakas V.I.,JSC Kyivstar | Fedorova N.V.,State University of Information and Communication Technologies
CriMiCo 2013 - 2013 23rd International Crimean Conference Microwave and Telecommunication Technology, Conference Proceedings | Year: 2013

The principles of the measurement of timing signals parameters on IP/MPLS transport network are considered. The results of measurements of instability of atiming signal of the Base Station are submitted. The basic principles of the creation of timing signals monitoring system are considered as well. © 2013 CriMiCo'2013 Organising Committee, CrSTC.


Argibay-Losada P.J.,State University of New York at Buffalo | Nozhnina K.,State University of Information and Communication Technologies | Sahin G.,Miami University Ohio | Sahin G.,University of Aveiro | Qiao C.,State University of New York at Buffalo
Proceedings - IEEE INFOCOM | Year: 2014

Due to lack of optical RAM buffers in fast optical switches (FOS), statistical multiplexing technologies using FOS like Optical Burst Switching (OBS) or Optical Packet Switching (OPS) are expected to have higher data losses than conventional electronic networks. Consequently, applications transferring data by means of TCP can suffer from a lower throughput. In this paper, we show that this low-throughput problem is mainly an artifact caused by the conventional TCP congestion control algorithms, and can be remedied by using a simple yet effective stop-and-wait congestion control algorithm instead, as long as the propagation delay between TCP source and TCP destination is small compared to the transmission time of an optical packet. We show that such a condition holds for a wide range of scenarios, including fat-tree-based data center networks. We also show that the throughput achieved in a FOS network using stop-and-wait can be the same as, or higher than that in an equivalent, conventional electronic network. © 2014 IEEE.


Argibay-Losada P.J.,University of Vigo | Argibay-Losada P.J.,State University of New York at Buffalo | Nozhnina K.,State University of Information and Communication Technologies | Suarez-Gonzalez A.,University of Vigo | And 2 more authors.
Computer Communications | Year: 2014

The vast majority of popular Internet applications are controlled by TCP. The provision of end-to-end quantitative QoS guarantees to individual TCP flows is thus an exceedingly interesting problem, facilitating new business models for the Internet and therefore encouraging investments on the part of Internet Service Providers (ISPs). However, although this field has been extensively researched in previous decades, the failure of the resulting proposals to deploy Internet-wide in any meaningful way is especially noteworthy. This failure showcases the importance that scalability and implementation complexity issues can have in the success of Internet-wide QoS technologies. In this paper, we present a scalable, robust and exceedingly simple method able to provide end-to-end quantitative guarantees for the throughput of individual bulk TCP flows in the Internet. Our method does not mandate changes to existing Internet infrastructure nor complex agreements among ISPs, making its implementation straightforward in the current Internet. © 2014 Elsevier B.V. All rights reserved.


Gostev V.I.,State University of Information and Communication Technologies
Journal of Automation and Information Sciences | Year: 2010

On the basis of the method of designing fuzzy controllers, described in 1, the elements of the theory and practical circuit of the simplest fuzzy controllers, which can be used in different automatic control systems are given. © 2010 by Begell House Inc.


Tkachenko O.,State University of Information and Communication Technologies | Eremeev Y.,State University of Information and Communication Technologies
Modern Problems of Radio Engineering, Telecommunications and Computer Science - Proceedings of the 10th International Conference, TCSET'2010 | Year: 2010

Measuring of loading and indexes of quality of service can take place with a purpose: technical exploitation, prognostication of loading; study of streams of loading and quality, accumulation of statistical information. Measuring methods, measurings devices and measured indexes, get out depending on a purpose. The article is presented devoted the methods of measuring of loading and indexes of quality of service, their analysis and comparison.


Horoshko V.,State University of Information and Communication Technologies | Tiskina O.,State University of Information and Communication Technologies | Odiyanenko O.,State University of Information and Communication Technologies
Modern Problems of Radio Engineering, Telecommunications and Computer Science - Proceedings of the 10th International Conference, TCSET'2010 | Year: 2010

The convenient method for programming of calculation of transfer functions of the defense control systems has been proposed.


Krivuca V.,State University of Information and Communication Technologies | Berkman L.,State University of Information and Communication Technologies | Kolobov S.,State University of Information and Communication Technologies
Modern Problems of Radio Engineering, Telecommunications and Computer Science - Proceedings of the 10th International Conference, TCSET'2010 | Year: 2010

The questions of optimization of networks of FGN, the basic feature of which is multidimensionalness, are examined. For such multidimensional networks it is suggested to use the methods of multicriterion synthesis. The basic methods of association of partial criteria and receipt of the generalized criterion are described that allows to carry out the global synthesis of multidimensional network taking into account partial criteria, necessary for providing of the set exactness of parameters of network.


Didkowsky R.M.,Cherkasy State Technological University | Vovchenko A.V.,Cherkasy State Technological University | Bokla N.I.,State University of Information and Communication Technologies
Automatic Control and Computer Sciences | Year: 2013

This work proposes a new method of symbol timing synchronization of communication systems that uses a stochastic carrier. By means of a computer simulation experiment, there was explored the effectiveness of the proposed method. The advantages and disadvantages were shown. © 2013 Allerton Press, Inc.


Astapenya V.M.,State University of Information and Communication Technologies | Sokolov V.Y.,State University of Information and Communication Technologies
2013 9th International Conference on Antenna Theory and Techniques, ICATT 2013 | Year: 2013

We consider the experimental results and calculations of the impact of directed properties of the antennas with the range of 2.4 GHz on solving the problem of the 'last mile' in wireless technology standard IEEE 802.11b. In the experiments to focus energy in a given subscriber direction there are applied electromagnetic accelerating metal-lamellar cylindrical lens along with the standard antenna of wireless access point and at the signal reception point the power of signal was speed up on 5-7 dB, and network capacity was increased on 4%. The best results of using polarization properties of antennas to enhance the information capabilities of radio systems of IEEE 802.11n standard in premises with difficult location and orientation of ray redirecting surfaces were obtained for the combination, where on the receiving and transmitting sides there where mounted three pulsators accordingly: the vertical and two next angularly -π/4 and π/4 relative to the central one. The gain of network capacity has increased in 2.4 times in comparison with the use of three parallel pulsators. © 2013 IEEE.


Gostev V.I.,State University of Information and Communication Technologies
Journal of Automation and Information Sciences | Year: 2010

The general energy model of a radio channel with fadings is obtained on the basis of the interactive MATLAB system. The model is built on the basis of the equation of signal transmission from the transmitter to receiver, taking into account signal attenuation, delay and fading in the medium of radio wave propagation The method of removing fadings in the radio control channel is given and the fuzzy-system of automatic control of the transmitter power in the adaptive channel is investigated. © 2010 by Begell House Inc.

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