STAGES AND PERSPECTIVE OF PLANNING AND DEVELOPMENT OF WIRELESS TELECOMMUNICATIONS INFRASTRUCTURE OF THE RUSSIAN FEDERATION
D.K.Ugnivenko, Ministry of Digital Development, Communications and Mass Media of the Russian Federation, director of the department of implementation of infrastructure projects; d.ugnivenko@digital.gov.ru
S.I. Lopato, FSBI NIIR, deputy director of the scientific center of big data processing systems; lopato@niir.ru
A.A. Zaharov, FSBI NIIR, deputy director general, associate professor, Ph.D.; a.zaharov@niir.ru
S.V. Kizima, FSBI NIIR, Research center of big data processing systems, director, ITU expert, Dr.Sci.(Tech.); StanislavKizima@mail.ru
The article deals with the development of wireless telecommunications infrastructure, features of development organization, stages of development and conceptual issues of methodology for planning the development of mobile networks and wireless access.
Keywords: telecommunications infrastructure, mobile communications and data transmission services, availability, accessibility, sufficiency, quality of telecommunications services, infrastructure project, model of telecommunications infrastructure development.
METHODOLOGY FOR FULL-SCALE TESTS OF COASTAL NAVTEX GMDSS FACILITIES
M.B. Protcenko, Sevastopol branch «Testing Centre «OMEGA» of FSBI NIIR, director of the branch, professor, Dr.Sci.(Tech.); procenko@niir.ru
V.V. Gromozdin, Sevastopol branch «Testing Centre «OMEGA» of FSBI NIIR, deputy director of the branch for technical development, associate professor, Ph.D.; gromozdin@niir.ru
V.I. Kovalenko, Sevastopol branch «Testing Centre «OMEGA» of FSBI NIIR, lead engineer; kovalenko@niir.ru
M.S. Kozub, Sevastopol branch «Testing Centre «OMEGA» of FSBI NIIR, head of scientific and technical testing department, postgraduate; kozub@niir.ru
A methodology for full-scale tests of coastal facilities (stations) of the NAVTEX service, a component of the global maritime distress and safety communications system, is presented. The calculation of the threshold value of the electromagnetic field strength on the side of the vessel is calculated based on the requirements of the resolutions of the International Maritime Organization and the calculated values of the maximum possible external noise levels on the side of the test vessel for a given test sea area. For cases when, for organizational or technical reasons, the test vessel cannot reach the approved or intended border of the service area and range, an experimental-theoretical method for testing is proposed.
Keywords: f ull-scale tests, maritime MF radio communication, signal-to-noise ratio, electromagnetic field strength, radio receiver sensitivity, global maritime distress and safety communication system, NAVTEX.
DELIVERY OF REFERENCE FREQUENCY AND TIME SIGNALS TO THE EQUIPMENT NODES OF RADIO ACCESS NETWORKS
D.K. Mazurenko, FSBI NIIR, leading researcher, Ph.D.; dm.ma2010@yandex.ru
D.A. Palcin, FSBI NIIR, head of research center; palcin@niir.ru
A.S. Fen, FSBI NIIR, head of department, fen@niir.ru
The architecture of the signal synchronization system (SSS), built on the basis of the PTP protocol, in packet-switched networks is described. Typical solutions for constructing a SSS for transmitting reference signals of frequency and phase (time) in radio access networks are considered.
Keywords: system of synchronization signals, packet-switched networks, radio access networks, reference signals of frequency, reference signals of phase and time, PTP protocol.
ANALYSIS OF THE INTERFERENCE IMPACT FROM 5G NR BASE STATIONS ON SATELLITE TRANSPONDERS OF FIXED SATELLITE SERVICES IN THE 6425−7125 MHZ FREQUENCY BAND
A.S. Pastukh, FSBI NIIR, head of a laboratory; a.pastukh@niir.ru
To study the long-term impact of 5G NR on the satellite systems in the 6425−7125 MHz the research estimated the impact to the satellite links of the fixed-satellite service (FSS) of 5G NR base stations located inside the satellite footprints is conducted. In the study, the analysis of aggregate interference from the base stations of 5G NR to the satellite receivers is presented. The analysis presents the calculation of signal-to-noise degradation of the satellite bent-piper links and bit error rates for each scenario.
Keywords: 5G NR, FSS, Monte-Carlo simulation, spectrum engineering, frequency management, electromagnetic compatibility, MATLAB, ITU-R.
DYNAMICS OF SIGNAL DISTORTION CAUSED BY THE DOPPLER EFFECT IN LOW-ORBIT SATELLITE SYSTEMS
S.S. Shavrin, Moscow Technical University of Communications and Informatics (MTUCI), professor, Dr.Sci.(Tech.); sss@mtuci.ru
A.A. Lipatov, FSBI NIIR, head of department; lipatov@niir.ru
O.Yu. Musatova, MTUCI, senior tutor; o.i.musatova@mtuci.ru
Doppler effect influence in modern satellite systems is being studied including traditional frequency shift and spectrum destruction (distortion). The latter factor leads to spectrum width variations accompanied by signal duration variations. It plays significant role in the very high frequency bands (especially in Q and V) used in low-orbit satellite systems.
Keywords: Doppler effect, spectrum distortion, Doppler shift, low-orbit satellite systems.
ON DEPENDABILITY AND QUALITY INDICATORS IN TELECOMMUNICATIONS
V.A. Netes, Moscow Technical University of Communication and Informatics, professor, Dr.Sci. (Tech.); v.a.netes@mtuci.ru
The basic concepts used to formulate dependability requirements in telecommunications are considered. The parametric approach to the definition of failure criteria is indicated. The relationship between dependability measures and service quality parameters is explained. Special attention is paid to 5G networks. The presentation is based on the analysis of international and domestic regulatory documents. In particular, the IEC standards, ITU Recommendations, and 3GPP specifications are considered. The shortcomings inherent in some of these documents are indicated.
Keywords: dependability, reliability, availability, failure criterion, quality of service, packet loss ratio, IEC, ITU, 3GPP, 5G networks.
STRUCTURAL OPTIMIZATION OF HIGH-PERFORMANCE SYSTEMS WITH UNMANNED AERIAL VEHICLES
L.O. Myrova, FSBI NIIR, leading researcher, professor, Dr.Sci.(Tech.); myrova@niir.ru
М.М. Stupnitskiy, FSBI NIIR, scientific secretary, associate professor, Ph.D.; smm@niir.ru
The results of the analysis of the state of development of modern UAVs are given, the requirements for modern UAVs are formulated, the directions for unifying UAVs are determined, the criteria and methods for structural optimization of UAVs are considered, the structure and interconnection of the elements of the information transmission system of the complex with UAVs of the onboard and ground data transmission systems are modeled.
Keywords: unmanned aerial vehicles, UAV, UAV structural optimization methods, hardware and information controls, technical compatibility, efficiency.
CHOICE OF THE METHOD OF INFORMATION INTERACTION IN THE CORPORATE INFORMATION SPACE
I.B. Saenko, FSBI Branch NIIR — LONIIR, senior researcher, S.M. Budyonny’s Military Academy of Communications, professor, Dr.Sci.(Tech.); ibsaen@mail.ru
A.A. Makukha, S.M. Budyonny’s Military Academy of Communications, adjunct; artempop25@mail.ru
A.V. Ermakov, M.K. Ammosov’s North-Eastern Federal University, rector’s adviser, FSBI Branch NIIR — LONIIR, head of a department, associate professor, Ph.D.; ermakov-it@yandex.ru
The results of the analysis of information interaction methods in the corporate information space are considered. The properties inherent in data storages are analyzed. The results of the assessment of information interaction methods are presented and the choice of modular storage as the most preferred method is substantiated.
Keywords: database, information space, information exchange, data storage.
ABOUT ONE METHOD OF FREQUENCY SYNTHESIS
V.I. Koslov, independent researcher, Ph.D.; vkoslov@yandex.ru
The article considers a method of frequency synthesis based on the use of two concepts: direct digital synthesis (DDS) with the exception of the LUT table and a single-loop PLL at the output. The method of calculating fractional interference due to the inaccuracy of digital-analog conversion is described and these calculations are performed. The potential advantages of the synthesis method in providing high spectral purity of the signal in comparison with the DDS method and the PLL method with a frequency divider in its loop are shown. The conclusion is made about the expediency of checking the calculations made by means of integrated technology in order to determine the possibility of using the method in the development of a series of integrated circuits of frequency synthesizers with improved characteristics
Keywords: frequency synthesis, spectral purity of the signal.
