CHALLENGES OF USING L- AND S-BANDS FOR THE DIRECTTO-CELLULAR HYBRID SATELLITE 5GA/6G SYSTEMS
A.S. Pastukh, FSBI NIIR, head of laboratory; a.pastukh@niir.ru
D.I. Kalugina, FSBI NIIR, specialist; kaluginadi@niir.ru
E.E. Devyatkin, FSBI NIIR, director of Advanced Wireless Communication Technologies Research Center; edevyatkin@niir.ru
M.V. Ivankovich, FSBI NIIR, deputy director of research center; m.ivankovich@niir.ru
Keywords: direct-to-cellular, n255, n256, 5G, 6G, NB-IoT, NTN, 3GPP, ITU-R, S-band, L-band, Inmarsat, Omnispace, Lyra
This paper evaluates interference of 5GA/6G NTN satellite systems in L- and S-bands, which are marked by 3GPP as n255 and n256 bands for NTN networks. The research methodology and simulation stages are described. Calculations and conclusions about the influence of hybrid satellite systems in the L- and S-bands on the communication lines of user terminals and earth stations of the Inmarsat, Lyra and Omnispace systems are presented. Based on the studies carried out, a conclusion was made about the challenges of using n255 and n256 bands for NTN satellite systems.
INTEGRATION OF SATELLITE SEGMENT INTO 3GPP SPECIFICATIONS FOR 5G NETWORKS. PART II
K.Yu. Kolomensky, Saint Petersburg branch FSUE NIIR-LONIIR, deputy director for science, Ph.D.; kkolomensky@loniir.ru A.Yu. Demidova, Saint Petersburg branch FSUE NIIR-LONIIR, specialist; ademidova@loniir.ru
Keywords: 3GPP specifications, 5G networks, satellite segment, payload, user equipment, base station, satellite gateway, radio access network, core network.
The article considers the main directions of 3GPP work on standardization of joint use of 5G and Non-Terrestrial Networks (NTN), which can include satellites in orbit of different types, high-altitude platforms, drones or other airborne vehicles. The focus of the article is on those sections of the 3GPP specifications, which are related to the specific features of NTNs due to the fast movement of non-geostationary satellites relative to the Earth’s surface, as well as the large size of satellite coverage areas. The second part of the article discusses the solutions outlined in the 3GPP specifications for 5G networks and aimed at overcome the problems associated with the movement of satellites in non-geostationary orbits and large coverage areas in NTN.
RECONFIGURABLE RIS SMART SURFACES: PROSPECTS FOR NEXT-GENERATION ACCESS NETWORKS
A.P. Gorchakov, FSBI NIIR, Access Network Research Center (ANRC), head of department, Ph.D.; gorchakovap@niir.ru
A.A. Konstantinova, FSBI NIIR, ANRC, deputy director; konstantinovaaa@niir.ru
D.A. Paltsin, FSBI NIIR, director of the ANRC; palcin@niir.ru
A.V. Ryzhkov, Moscow Technical University of Communications and Informatics (MTUCI), chief researcher, professor, Dr.Sci.(Tech.); ryjkov.anatoly@yandex.ru
A.S. Fen, FSBI NIIR, ANRC, head of department; fen@niir.ru
A.V. Shalaginov, FSBI NIIR, ANRC, leading engineer; shalaginovav@niir.ru
M.L. Schwartz, MTUCI, head of department, Ph.D.; mschwartz@smsync.ru
Keywords: reconfigurable intelligent surfaces, RIS, metasurfaces, artificial intelligence.
This article discusses the technology of Reconfigurable Intelligent Surfaces (RIS) as one of the most promising areas for the development of new generation access networks 5GA/6G. The advantages and the possibilities of practical application of such surfaces are shown.
CLUSTER HEAD NODE SELECTION IN HIGH DENSITY 3D IoT NETWORKS
A.V. Marochkina, Bonch-Bruevich Saint-Petersburg State University of Telecommunications, department of communication networks and data transmission, postgraduate; anastasiy1996@mail.ru
Keywords: high-density IoT networks, head node, structure, clustering, optimization, graph center.
The paper analyzes the problem of choosing the head nodes of clusters in a three-dimensional high-density Internet of Things network in terms of its computational complexity and solution accuracy. An analysis is given of known approximate algorithms, the application of which is possible for its solution. The description of the developed method for choosing a solution algorithm as an optimization problem is given. The proposed method makes it possible to solve a compromise between the time of obtaining a solution and its accuracy. The developed method can be used in planning and managing high-density Internet of Things networks, taking into account their placement in three-dimensional space.
CALCULATION OF THE PARAMETERS OF A SINGLE-HOP DECAMETER COMMUNICATION LINE IN THE ARCTIC UNDER CONDITIONS OF ANOMALOUS IONOSPHERIC DISTURBANCES
N.N. Semerkov, JSC «Russian Institute of Powerful Radio Engineering», leading researcher, Military Institute of Additional Professional Education of the Military Training Scientific Center of the Navy (Naval Academy), teacher, Ph.D.(Mil.); vh77@mail.ru
Keywords: radio communication, short waves, decameter waves, high-latitude ionosphere, radio link modeling, decameter radio communication prediction.
The article presents the results of studies of the operation of decameter radio links in the Arctic based on the processing of statistical data from practical work. A description of the computational complex built on the basis of the decameter radio link model and additional algorithms that allow taking into account the effect of geomagnetic storms of varying intensity on the efficiency of radio communication without involving equipment for oblique ionospheric sounding is given. Approaches to the construction of such algorithms are presented.
EVOLUTION OF TELECOMMUNICATION SYSTEMS FOR INDUSTRIAL COMMUNICATION
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
Keywords: telecommunication system, industrial communication, high-tech company, service, quality of service, reliability, key performance indicators.
The directions of the evolution of telecommunication systems used for the organization of industrial communication are analyzed. The principles of creating and upgrading telecommunication system for hi-tech company are formulated. Such a system is viewed as a universal model for the long-term development of production communication in general. The directions of further research connected with the processes of evolution of public communication networks are suggested.
MODELING OF HOMOGENEOUS LADDER ELECTRICAL CIRCUITS IN TELECOMMUNICATIONS BY THE RECURRENT METHOD
S.A. Iasinskii, S.M. Budyonny’s Military Academy of Communications, professor, associate professor, Dr.Sci.(Tech.); yasinsky777@mail.ru
Keywords: telecommunication, linear electrical circuits, recurrent method, golden section, Fibonacci sequence.
The article analyzes mathematical models for modeling resistive homogeneous linear electrical circuits by the recurrent method with its subsequent improvement taking into account previously unexplored possible varieties of options for constructing linear homogeneous structures consisting of resistive, capacitive and inductive elements.
METHOD OF ALGEBRAIC SYNTHESIS OF ORTHOGONAL BINARY SEQUENCES FOR DATA TRANSMISSION SYSTEMS WITH CODE DIVISION MULTIPLEXING
V.V. Zelenevsky, branch of the Military Academy of Strategic Missile Forces named after Peter the Great (MA SMF), professor, Dr.Sci.(Tech.); Zelenevsky. Vladimir@gmail.com
Yu.V. Zelenevsky, MA SMF, researcher, Dr.Sci.(Tech.); sys1434@mail.ru
A.V. Popov, branch of the MA SMF, adjunct; alexnichei@yandex.ru
A.B. Nakonechny, ANPO «Institute of Engineering Physics», researcher; nab20091990@yandex.ru
Keywords: algebraic synthesis, generator polynomial, Walsh sequences, cross-correlation coefficient, autocorrelation function, sequential start, parallel start, generator speed, binary cyclic code.
A method of algebraic synthesis of orthogonal binary sequences based on binary noise-resistant codes with improved autocorrelation properties and its implementation with the parallel start-up of a generator (shaper) to increase performance has been developed.
GENERATION OF PSEUDO-RANDOM BIT SEQUENCES USING EQUATIONS OF DYNAMIC CHAOS THEORY USING THE LORENTZ ATTRACTOR AS AN EXAMPLE
N.V. Lemeshko, JSC Corporation Cometa, head of a department, Dr.Sci.(Tech.); nlem83@mail.ru
S.S. Zaharova, High School of Economics, teacher, Ph.D.; ZaharovaSvetlana@yandex.ru
Keywords: system of differenti al equations, Lorenz attractor, pseudo-random bit sequence, algorithm.
The article proposes an approach to the formation of pseudo-random bit sequences (RBS) based on the equation in which the Lorentz attractor was discovered. The main properties of the corresponding system of differential equations are considered, the solution of which gives three noise functions. Based on this, pseudo noise signals can be generated, which can be used to generate the RBS. A special algorithm is proposed for this.
