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Publications of Gaipov Konstantin Eduardovich
Software systems and computational methods, 2021-2
Demichev M.S., Gaipov K.E., Demicheva A.A., Faizulin R.F., Malyshev D.O. - Frequency scheduling algorithm with the allocation of the main and additional frequency bands. pp. 36-62

DOI:
10.7256/2454-0714.2021.2.35214

Abstract: The subject of this research is the frequency planning algorithm for networks with an arbitrary topology of links over radio channels. The algorithm determines the total number of non-overlapping frequency ranges for the entire network and provides the distribution of each frequency range between communication nodes. The algorithm consists of two stages: at the first stage, there is a search and simultaneous distribution of frequency channels, the so-called main frequency range, as a result, only one frequency range is allocated to each node; at the second stage, additional frequency channels are searched for, which can be used by a separate subset of nodes, thus , some nodes can use more than one frequency range, but several at once. The novelty of this research lies in the developed frequency planning algorithm for wireless communication systems with an arbitrary topology of communications over radio channels. The result of the operation of the algorithm for a wireless communication system is the allocation of radio frequencies for communication nodes from the common frequency band allocated for the wireless communication system, in terms of reuse, eliminating the effect of interference. The result for communication nodes is the allocation of a baseband and an additional frequency band, taking into account the topology of the radio network, which can be used by a separate subset that makes wireless communication systems resistant to narrowband random interference.
Software systems and computational methods, 2020-4
Demichev M.S., Gaipov K.E. - Search algorithm for loopless routes pp. 10-25

DOI:
10.7256/2454-0714.2020.4.33605

Abstract: The subject of this research is the search algorithm for loopless routes from transmitter to the recipient of network traffic in the conditions of a known network topology. In designing data transmission network, one of the primary problems is the formation of network traffic routing, due to the fact that heavy traffic often cause the occurrence of bottlenecks in form of the overloaded communication node, which results in speed reduction of data transmission. This article provides the search algorithm for loopless routes from transmitter to the recipient of network traffic; the result is presented as a set of loopless  routes in accordance with the specified network topology. The article also provides the software code of the algorithm written in the C# language, as well as the results of test solutions of the specified topologies. The algorithm was developed via experimental and theoretical methods, on the bases of the available route search algorithms, such as Floyd's algorithm and Dijkstra's algorithm, as well as mechanisms of static and dynamic routing, such as RIP, OSPF, and EIGRP. The novelty of this work consists in elaboration of search algorithm for loopless routes from transmitter to the recipient in the conditions of the available network topology; and in comparison of the acquired results with other methods of formation phase variables. This algorithm allows generating a list of all loopless routes within the indicated network topology between the pair of interacting nodes.
Cybernetics and programming, 2018-1
Demichev M.S., Gaipov K.E., Korolev E.M., Demicheva A.A., Narozhnyi A.I. - Formation of the radio network topology with placement of mobile radio stations while minimizing the radiation power of radio signals pp. 1-14

DOI:
10.25136/2644-5522.2018.1.24983

Abstract: The subject of the study is the formation of a radio network topology with placement of mobile radio stations, in which the total radiated signal power for radio stations will be minimized. The radiation power of signals for all radio stations and the coordinates for mobile radios are determined in the article, it is also assumed that the transmitting antennas of all radio stations have a circular pattern. To solve this problem, a mathematical model is constructed that has a number of assumptions that imply ideal conditions for the propagation of radio waves, as well as the location of radio stations in a Cartesian coordinate system. The development of the algorithm was carried out by an experimental-theoretical method, based on known facts of radio transmission and a mathematical solution of the Steiner problem for four and five vertices. The novelty of the study is the developed algorithm for determining the coordinates of mobile radio stations, as well as the radiation power of signals for stationary and mobile radios with a circular pattern of directionality. The result of the algorithm works is to determine the topology of the network and the range of operation of each radio station, which consumes the lowest radiation power of the transmitting antennas of radio stations.
Cybernetics and programming, 2017-4
Demichev M.S., Gaipov K.E., Demicheva A.A., Narozhnyi A.I. - Radio frequency planning in the radio network involving exclusion of the radio wave interference. pp. 1-23

DOI:
10.25136/2644-5522.2017.4.23786

Abstract: The object of study involves radio frequency planning when designing a radio network.  The frequency allocation within the provided range is one of the key problems in radio networks, since when the frequency is incorrectly provided for the radio station, there may be the radio wave interference effect, and the information transfer becomes distorted.  The article provides an algorithm for frequency planning, which may be used for providing  frequency for the radio stations within radio networks, the algorithm involves circular pattern, known radio station coordinates and the emitted radio power. The development of the algorithm involved experimental theoretical method based upon the known facts regarding radio broadcast and result modeling, as well as use of software. The novelty of the study is due to the development of an algorithm for frequency planning when designing a radio network for a provided frequency resource for a radio station with the circular pattern, known coordinates and emitted radio power. The result of its application involves distribution of radio frequency with their dual use, while excluding interference effect.
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