THE PROBLEM OF TELECOMMUNICATIONS FRAUD USING SIM BOXES AND APPROACHES TO ITS SOLUTION
A.A. Konstantinova, The M.I. Krivosheev National Research Centre for Telecommunication (NRCT), deputy director of the Access Network Research Center; konstantinovaaa@nic-t.ru
D.A. Palcin, NRCT, deputy director of the Access Network Research Center; palcin@nic-t.ru
A.S. Fen, NRCT, Access Network Research Center, head of department; fen@nic-t.ru
A.V. Shalaginov, NRCT, Access Network Research Center, leading engineer; shalaginovav@nic-t.ru
R.N. Kaplya, NRCT, Access Network Research Center, leading specialist; kaplyarn@nic-t.ru
В.М. Bondar, NRCT, Access Network Research Center, leading specialist, Ph.D.; bondarvm@nic-t.ru
A.P. Gorchakov, NRCT, Access Network Research Center, head of department, Ph.D.; gorchakovap@nic-t.ru
Abstract. The article describes the problem of telecommunications fraud on telecom operators’ networks, provides various modes of using SIM boxes on communication networks, analyzes some types of telecommunications fraud using SIM boxes, indicates the main methods of combating fraud from SIM boxes (including perspective ones), and suggests some regulatory and technical measures to combat telecommunications fraud from SIM boxes.
Keywords: SIM box, PBX, Virtual PBX, SIM card, fraud, NLP, AI, machine learning, ML.
INVESTIGATION OF THE LDPC-CODEC
O.N. Minaeva, Moscow Technical University of Communications and Informatics (MTUCI), department of radio engineering systems (RTS), senior lecturer; olga-minaeva52@yandex.ru
A.I. Sattarova, MTUCI, department of RTS, assistance lecturer; ang.satt.97@gmail.com
M.K. Minaeva, MTUCI, department of RTS, student; zodiak1710@mail.ru
Abstract. A study has been conducted on the most popular codes for noise-resistant coding, namely correction codes with low-density parity checks (LDPC). The main theoretical properties of LDPC codes are considered. A codec containing an encoder and a decoder has been developed, and its main characteristics have been obtained. The created device can be used for further design as part of more complex codes, as well as for introductory work by novice specialists in this field.
Keywords: LDPC, LDPC-code, noise-resistant code, correction code, low-density codes.
METHODOLOGY FOR APPLYING INTELLIGENT DIGITAL TWINS TO REDUCE THE RECOVERY TIME OF AUTOMATED CONTROL SYSTEMS
A.V. Pachin, Bonch-Bruevich Saint Petersburg State University of Telecommunications (SPbSUT), associate professor, Ph.D.; pachin.av@sut.ru
A.A. Berezkin, SPbSUT, associate professor, Ph.D.; berezkin.aa@sut.ru
V.V. Borodulin, Cifra LLC, head of business development, Ph.D.; viacheslav.borodulin@zyfra.com
S.A. Cherkasov, JSC Apatit, deputy general director for economic security; scherkasov@phosagro.ru
A.I. Smirnov, JSC Apatit, deputy general director for security, associate professor, Ph.D.(Econ.); asmirnov4@phosagro.ru
R.V. Kirichek, SPbSUT, rector, professor, Dr.Sci.(Tech.); kirichek@sut.ru
Abstract. The article formulates the task of creating a tool to reduce the downtime of data transmission infrastructure (DTI) using intelligent digital twins. A methodology for solving this problem is described, utilizing ontological and neural network models. The application of intelligent digital twins (IDTs) allows for the automation of failure diagnosis and repair planning processes, thereby increasing the efficiency of personnel actions in eliminating DTI equipment failures.
Keywords: automated control systems, reliability, artificial intelligence, semantic artificial intelligence, ontological modeling, intelligent digital twins.
RELEVANCE OF REMOTE TOOLS FOR HEARING CORRECTION DIAGNOSTICS
A.Yu. Bredikhin, Masbusinessholding LLC, lead engineer; nihau1947@gmail.com
Abstract. This article compares the effectiveness of using hearing aid applications on mobile devices (such as smartphones) with specialized digital hearing aids. A brief review of similar mobile applications is presented. The study explores the potential of remote network-based hearing diagnostics on the basis of mobile applications, which perform the functions of digital hearing aids, aiming to improve the affordability of hearing assistance for people with hearing impairments, lower the technical accessibility threshold for users, and reduce the load on healthcare systems. A network system for remote diagnosis and fitting of hearing aids on a mobile platform is presented.
Keywords: diagnostics, audiometry, hearing impairments, Petralex, audiologist
REQUIREMENTS FOR PRESERVATION OF NETWORK CHARACTERISTICS IN THE INTERACTION OF SS7 AND DIAMETER NETWORKS
D.A. Paltsin, The M.I. Krivosheev National Research Centre for Telecommunication (NRCT), director of the center for access network research, palcinda@nic-t.ru
A.S. Fen, NRCT, head of the department of the access network research center, fenas@nic-t.ru
A.V. Shalaginov, NRCT, senior engineer at the access network research center, shalaginovav@nic-t.ru
Abstract. An overview of the problems encountered in the interaction of networks using SS7 and Diameter signaling systems is presented. The methods and means of information protection in such networks are analyzed, as well as errors in information processing that occur and affect network vulnerability characteristics.
Keywords: network security, SS7 and Diameter signaling systems, safety of network characteristics.
CALCULATION OF THE MAIN ENERGY PARAMETERS OF THE EARTH STATION FOR THE EXPRESS-RV SATELLITE COMMUNICATION SYSTEM
V.V. Levchenko, The M.I. Krivosheev National Research Centre for Telecommunication (NRCT), engineer of the second category, Moscow Technical University of Communications and Informatics (MTUCI), postgraduate; vladlevchen@yandex.ru
Abstract. The purpose of the work is to determine the main energy parameters of the Earth station for the Express-RV satellite communication system. The energy calculation of the subscriber radio link channel for a satellite communication system consisting of a spacecraft in a highly elliptical Molniya orbit and DVB-S2 Earth stations has been performed. As a result of the calculation, data on the required effective isotropically radiated power and the minimum gain of the Earth station when receiving a signal from a satellite are obtained.
Keywords: energy calculation, equivalent isotropically radiated power, earthstation, gainfactor, required power, Express RV, satellite communication systems.
LOW EARTH ORBIT RELAY SATELLITES
А.S. Dementev, The M.I. Krivosheev National Research Centre for Telecommunication (NRCT), STC STS, engineer; dementevas@niir.ru
K.V. Sukhanova, NRCT, STC Analysis of EMC, engineer; suhanovakv@niir.ru
K.A. Kubickaya, NRCT, STC Analysis of EMC, engineer; kubickayaka@niir.ru
Abstract. This article provides an overview and analysis of modern low Earth orbit (LEO) satellite communication systems that provide global connectivity, offering a wide range of services from high-speed broadband Internet access to data transmission for various applications, including the Internet of Things (IoT). Particular attention is given to the analysis of the characteristics and functionalities of existing and developing satellite constellations.
Keywords: low Earth orbit (LEO), relay satellites, satellite constellations, broadband Internet access, Internet of Things (IoT).
LOW EARTH ORBITS RELAY SATELLITES
N.A. Cherkasov, The M.I. Krivosheev National Research Centre for Telecommunication (NRCT), STC STS, engineer; cherkasovma@nic-t.ru
V.S. Aleshin, NRCT, STC STS, head of laboratory, Ph.D; aleshinvs@nic-t.ru
Abstract. This article provides an overview of modern telecommunications satellites located in geostationary orbit (GSO). Special attention is paid to the main parameters of satellite communications on the GSO, namely: orbit population, mass and dynamics of spacecraft launches.
Keywords: geostationary orbit, satellite broadcasting, orbital congestion, telecommunication satellites.
APPROACHES TO EXTENDING THE OPERATING FREQUENCY RANGE OF ANTENNA SYSTEMS
D.I. Bukhanets, JSC NPODAR named after A.L. Mints, scientific secretary, Dr.Sci.(Tech.); dbukhanets@rti-mints.ru
A.A. Luchin, FSBSI Analytical Center, junior researcher; luchin-aa@fgbnuac.ru
I.M. Spodobaev, LLC F-plus equipment and development, engineer; i.spodobaev@fplustech.ru
Abstract. The study of actual approaches to the expansion of the operating range of antenna systems described in foreign and domestic scientific literature, as well as in the materials of patent offices is carried out. The approaches are divided into several groups, for each of which characteristic examples and key features are given. The list of approaches formed the basis for the classification developed by the authors.
Within the framework of systematization of existing approaches to antenna systems operating bandwidth extension, classification of approaches is introduced according to the feature of systematicity reflecting different aspects of design. When constructing the classification, groups of methods are singled out: technological (updating of component base and materials), constructive (optimization of design and topology), systemic (transition to the system of radiators), as well as a general group of methods based on matching of radiators, processing of signals from them and logical control of the working bands of the antenna system. A brief description of the formed groups of methods, as well as methods in their composition is given.
Keywords: broadband systems, antenna system, range extension, technology, design, matching, signal processing, systematization of design methods.