Items of № 4, 2021

The Electrosvyaz Magazine is one of the leading science & technical magazines in Russia.

DIGITAL TERRESTRIAL BROADCASTING: FEATURES OF IMPLEMENTATION AND ISSUES OF USING RADIO BROADCASTING

  • A.V. Lashkevich, FSUE NIIR, EMC Analysis Center, deputy head of a department; a.lashkevich@niir.ru

Keywords: digital sound and multimedia radio broadcasting, digital radio broadcasting, radio frequency spectrum usage.

The article analyzes the main features of existing digital sound and multimedia broadcasting, advantages of digital radio as a technology for transmitting sound and multimedia information, benefits of different frequency ranges for digital radio, the influence of social, technical, and economic factors, and geographical characteristics on the technical requirements for broadcasting networks. The issues of the organization of high-quality radio broadcasting capable to attract an audience in conditions of the modern development of technologies are considered. The main tasks in the field of digital radio receiving equipment production are determined.

RESULTS OF THE DRM SIMULCAST FIELD TRIALS IN 87.5−108 MHZ BAND

  • S.A. Sokolov, LLC Digiton Systems, general director; sokoloff@digiton.ru
  • S.V. Myshyanov, Saint Petersburg State University of Telecommunications (SPbSUT), Scientific and educational center «Technologies of information and educational systems», director; mishyanov@gmail.com
  • Yu.A. Kovalgin, SPbSUT, professor emeritus, Dr.Sci.(Tech.); kowalgin@sut.ru

Keywords: analog FM radio, Digital Radio Mondiale, DRM, FM-band, VHF band-II, DRM-FM, DRM Simulcast.

The current state of digital radio broadcasting both in Russia and in the world is presented. Digiton Systems LLC carried out a high-power field trial of the DRM system in DRM Simulcast mode by order of the Russian Television and Radio Broadcasting Network (RTRN) in the FM band 87.5−108 MHz in St. Petersburg (Russian Federation) from July 2019 to December 2020. The transmitter was set to radiate at 95.9 MHz FM signal with a transmit power of 3 kW and DRM signal with a transmit power of 800 W simultaneously. The article presents the results of these studies. The results of evaluating the electromagnetic compatibility of FM and DRM broadcasting formats are also described.

DEVELOPMENT OF AN INTELLIGENT SYSTEM FOR MANAGING EDGE COMPUTING

  • A.A. Khakimov, Saint-Petersburg State University of Telecommunications (SPbSUT), department of communication networks and data transmission (CN&DT), postgraduate; abdukodir@akhakimov.info
  • A.S. Muthanna, SPbSUT, department of CN&DT, associate professor, Ph.D.; ammarexpress@gmail.com
  • A.I. Vybornova, SPbSUT, department of CN&DT, associate professor, Ph.D.; a.vybornova@gmail.com

Keywords: edge computing, MEC, genetic algorithms, service offloading.

The possibility of hosting Internet services both in remote clouds and in distributed edge computing systems is considered. Dynamic network topology and placement of services in edge computing systems using a genetic algorithm to analyze and predict service traffic are proposed. Effective methods for forecasting and predictive migration of services for edge computing systems are presented. An analysis of the problems of constructing high-load networks and the method of their solution by offloading services to edge peripheral devices are given. A model of interactions between the network operator and third-party service providers for optimal offloading of services is proposed. It is shown that the efficiency of network equipment can be increased by more than 30%.

A METHOD FOR SIZING DIGITAL CLUSTERS OF ULTRA-LOW LATENCY NETWORKS

  • N.A. Chistova, Saint-Petersburg State University of Telecommunications (SPbSUT), department of communication networks and data transmission (CN&DT), postgraduate; chistova.na@spbgut.ru
  • A.I. Paramonov, SPbSUT, department of CN&DT, professor, Dr.Sci.(Tech.); alex-in-spb@yandex.ru
  • A.I. Vybornova, SPbSUT, department of CN&DT, associate professor, Ph.D.; a.vybornova@gmail.com
  • A.E. Koucheryavy, SPbSUT, head of the department of CN&DT, professor, Dr.Sci.(Tech.); akouch@mail.ru

Keywords: ultra-low latency telecommunication networks, digital cluster, fractal dimension, signal propagation delay.

The paper proposes a method for sizing digital clusters in ultra-low latency networks, taking into account the lengths of connecting lines. Calculation of linear dimensions only on the basis of delay requirements does not take into account the peculiarities of laying communication lines, the length of which is greater than the obtained estimates, which negatively affects the temporal characteristics. The paper proposes a method that takes into account the peculiarities of laying communication lines based on estimates of the fractal dimension of the road network. The proposed method can be used in the planning and design of ultra-low latency networks.

TACTILE SIGNALS FORMATION IN THE PROBLEM OF LOSSY COMPRESSION FOR THE FACTOR ADDITIVE MODEL OF PERCEPTION

  • S.A.Vladimirov, Saint-Petersburg State University of Telecommunications, department of the communication networks and data transmission, senior lecturer; vlsa.vlcom@yandex.ru
  • E.V. Kosova, I.P. Pavlov First Saint-Petersburg State Medical University, department of therapeutic dentistry and periodontology, associate professor, Ph.D.(Med.); kosova.ev@bk.ru

Keywords: lossy compression, tactile signal, tactile mode, factor additive model.

The article considers the issue of formation and presentation of tactile modes signals for the problem of lossy compression in the framework of the factor additive model. The authors outlined approaches and implemented the basic principles of determining levels and ranges of tactile signals. A variant of the model is proposed and the functional structure of the tactile mode is determined. The implementation of time windows to improve the reliability of the operator’s tactile signals is proposed. It is shown that the considered problem will make it possible to implement a tactile encoder for data transmission networks based on lossy compression.

MODELING THE NETWORK STRUCTURE OF THE IoT USING FRACTALS

  • E.V. Tonkikh, FSUE NIIR, deputy head of a department; et@niir.ru
  • A.I. Paramonov, Saint-Petersburg State University of Telecommunications (SPbSUT), department of communication networks and data transmission (CN&DT), professor, Dr.Sci.(Tech.); alex-in-spb@yandex.ru
  • A.E. Koucheryavy, SPbSUT, head of the department of CN&DT, professor, Dr.Sci.(Tech.); akouch@mail.ru

Keywords: Internet of Things, IoT, fractal, fractal dimension, network structure, environment structure.

The paper proposes a method for planning the structure of the Internet of Things network based on the use of fractals. It is proposed to use fractal figures to describe the target environment, which determines the placement of network devices. The values of the estimate of the fractal dimension and the fraction of the area occupied by the target environment and the network model are used for planning. The results obtained can be used to describe the structure of the IoT network in an urban or other environment based on data obtained about the target environment in the form of plans, maps, or photographs.

FROM CRYPTOGRAPHIC PRIMITIVE TO PROFESSIONAL COMPETENCE

Keywords: cryptography, data transmission networks, additional professional educational program, training, teaching method.

The article considers the approach to the methodology of training specialists in information security in local area networks, implemented in educational practice, which allows, in the conditions of a limited educational time allocated within the framework of the advanced training course for specialists, to form the necessary professional competence.

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