ROUTING IN FAULT-TOLERANT ADAPTIVE NETWORKS
V.V. Borodin, Moscow Aviation Institute (MAI), associate professor, Ph.D.; doc_bor1@mail.ru
A.M. Petrakov, MAI, associate professor, Ph.D.; nio4@mai.ru
V.A. Shevtsov, MAI, professor, Dr.Sci. (Tech.); vs@mai.ru
The problem of routing in an adaptive communication network in the conditions of failures of network nodes is considered. On the basis of imitating modeling the influence of route metrics and algorithms of formation of routes on efficiency of functioning and fault tolerance of the network is determined. Routing algorithms are proposed and optimal values of routing parameters are determined in conditions of unreliable functioning of the nodes. Options of using the obtained results in the design of adaptive communication networks are discussed.
Keywords: mobile adaptive networks, routing protocols, dynamicnetwork topology changes, node failures, network reliability, network fault tolerance.
ESTIMATION OF SIGNAL-TO-INTERFERENCE RATIO IN TERAHERTZ BAND WIRELESS NETWORKS
V.I. Petrov, St. Petersburg State University of Telecommunications, department of telecommunication networks and data transmission, postgraduate student; vit. petrov@gmail.com
D.A. Moltchanov, Peoples' Friendship University of Russia, department of applied informatics and theory of probability, associate professor, Ph.D.; moltchanov. dmitri@gmail.com
Eu.A. Koucheryavy, Higher School of Economics National Research University, department of innovation and IT-business, professor, Ph.D.; yevgeni. koucheryavy@gmail.com
The paper studies the model of terahertz band wireless network. A constructive approach to estimate the average value of signal-to-interference ratio is presented. The approach takes into account the specific features of terahertz band networks, such as the use of directional antennas, signal attenuation due to molecular absorption, and signal blockage by human body. The presented approach is illustrated by the numerical results, showing the signal-to-interference ratio behavior as a function of deployment parameters. The results, obtained in this paper, can be further used to derive such important characteristics as capacity, bit error rate and throughput of network.
Keywords: terahertz band, wireless networks, interference analysis, signal-to-interference ratio.
DEVELOPMENT OF THE METHOD FOR HYBRID CONTROL OF MESSAGES DELIVERY ON THE BASIS OF LINEAR NETWORK CODE
Eu.O. Karpukhin, MAI, associate professor, Design Information Technologies Center of Russian Academy of Sciences, senior scientist researcher, Ph.D.; ret1987@yandex.ru
N.V. Britvin, MAI, student; britvin.nickita@yandex.ru
Problems of constructing a systematic linear network code are considered. The variants of generation of the generating matrix, the most effective of which is the method of randomized filling the matrix with prime numbers, are offered. Estimates of the average assembly time and data processing speed by coder and decoder of a linear network code were obtained using the hybrid message delivery control method. The high efficiency of the code to prevent blocking of packets in queues of receiver buffer at insignificant overhead costs with a possibility of their reduction is shown.
Keywords: transport coding, information interaction, ARQ/FEC, generating matrix of a linear network code.
OPTIMIZATION OF MAINTENANCE SYSTEM OF EARLY WARNING RADAR STATIONS ON THE BASIS OF FAILURE DETECTION ACCORDING TO THE BUILT-IN CONTROL DATA
S.F. Boev, RTI Group, general designer, Dr.Sci. (Tech), Dr.Sci. (Econ.); kantselariya@oaorti.ru
A.P. Linkevichius, RTI Group, head of the Complex, Ph.D.; alinkevichius@oaorti.ru
S.S. Matveeva, Academician A.L. Minz Radiotechnical Institute, specialist; s.s.matveeva@gmail.com
A.V. Timoshenko, Academician A.L. Minz Radiotechnical Institute, deputy general designer, professor, Dr.Sci. (Tech); u567ku78@gmail.com
V.A. Shevtsov, MAI, professor, Dr.Sci. (Tech); vs@mai.ru
The technique of calculation of key reliability characteristics of early detection radar stations, including availability factor, probability of failure-free operation and mean recovery time is proposed. The calculation is based on array of retrospective data on the state of radar station and information on failures and incidents. With the help of machine learning methods the dependence of possible radar station failures on built-in control input data and general designer’s stand data is analyzed.
Keywords: early warning radar stations, radar station operation, maintenance, coefficient of technical utilization, failure prediction, machine learning.
JAMMING CONDITIONS OF USER NAVIGATION EQUIPMENT OF SATELLITE RADION
V.N. Yudin, MAI, department of theoretical radio engineering, professor, Dr.Sci. (Tech.); vn_yudin@mail.ru
E.A. Kamnev, MAI, department of theoretical radio engineering, postgraduate student; ekam91@yandex.ru
The method of accounting for the influence of internal factors of satellite radionavigation systems on the efficiency of jamming of user navigation equipment is developed. Analytical equations and numerical results which allow to determine the extent of influence of receiver noise and intersystem interference on the coefficient of jamming are proposed.
Keywords: satellite radionavigation system, navigation equipment, jamming, noise interference, intersystem interference, condition of jamming, coefficient of jamming, quality factor of jamming.
JAMMING CONDITION OF NAVIGATION EQUIPMENT OF SATELLITE RADIONAVIGATION SYSTEMS TAKING INTO ACCOUNT THE PRESENCE OF ANTI-JAMMING PROCESSING
V.N. Yudin, MAI, department of theoretical radio engineering, professor, Dr.Sci. (Tech.); vn_yudin@mail.ru
E.A. Kamnev, MAI, department of theoretical radio engineering, postgraduate student; ekam91@yandex.ru
Jamming conditions of navigation equipment of satellite radionavigation systems for jammers are determined. These conditions take into account different anti-jamming facilities that are included in the navigation equipment. Cases of jamming of the navigation equipment by single and multiple jammers are considered.
Keywords: satellite radionavigation system, navigation equipment, jamming, jamming conditions, suppression ratio, spatial rejection, spatial selection, polarization selection, frequency rejection, coefficient of improvement.
MULTIMODAL FILTRATION OF NAVIGATION PARAMETERS OF GNSS USER BASED ON PSEUDOPHASE MEASUREMENTS OF SATELLITE NAVIGATION SYSTEM SIGNALS
D.V. Kishko, LLC Topcon Positioning Systems, programmer engineer, Ph.D.; dvkishko@gmail.com
A.I. Fomin, MAI, professor, Ph.D.; vms402@mail.ru
The article presents the analysis of multimodal filtration algorithm in real time kinematic mode of GNSS receiver. Experiment conducted on different lengths of base line (1 m and 4000 m). The results include error of estimation of receiver relative coordinates and characteristics of convergence time of the algorithm in comparison with various approaches common in practice.
Keywords: RTK, multimodal filtration, GNSS, ambiguity resolution, LAMBDA.
ANTENNA SELECTION ALGORITHMES IN MIMO SYSTEMS
V.B. Kreyndelin, Moscow technical university of communications and Informatics, professor, Dr.Sci. (Tech.); vitkrend@gmail.com
M.L. Khazov, Ministry of Telecom and Mass Communications of the Russian Federation, head of department; mikekhazov@mail.ru
Communication systems with many transmitting and receiving antennas (Multiple-Input-Multiple-Output, MIMO), which became widespread due to the much higher bandwidth and noise resistance compared to traditional communication systems with a single transmitting and receiving antenna (Single-Input-Single-Output, SISO) are considered. The complexity of realization of high order MIMO systems is too high. Various antenna selection algorithms for MIMO systems wich is allowing to reduce their complexity are described.
Keywords: MIMO, spectral efficiency, noise resistance, antenna selection, communication channel capacity.
THE PRINTED BROADBAND AIRBORNE ANTENNA WITH LAMELLAR STRUCTURE
D.I. Voskresenskyi, MAI, head of department, professor, Dr.Sci. (Tech.); oea8888@gmail.com
E.V. Ovchinnikova, MAI, associate professor, Ph.D.; oea8888@gmail.com
Pham Van Vinh, MAI, postgraduate student; phamvinh1609@gmail.com
S.G. Kondratieva, MAI, associate professor, Ph.D.; kondratieff89@ya.ru
P.A. Shmachilin, MAI, associate professor, Ph.D.; shmachilin@yandex.ru
The design of a broadband microstrip antenna for airborne telecommunication system is described. The antenna representing the modified broadband bow-tie radiator combined with impedance structure is considered. The results of antenna numerical electromagnetic simulation are presented. The main characteristics of the antenna are determined.
Keywords: airborne antenna, satcom, microstrip antenna, bow-tie antenna, broadband antenna, impedance surface.
MONITORING OF INFORMATION FLOWS PROCESSING IN DISTRIBUTED ELECTRONIC DOCFLOW SYSTEMS
N.B. Bakanova, Keldysh Institute of Applied Mathematics, Russian Academy of Sciences, head of sector, Dr.Sci.(Tech.); nina@keldysh.ru
The article discusses the problems of the development of electronic document management systems for large organizations, which are required to interact with interdepartmental information systems, such as MEDO, MB portal, SSTU and others.
Keywords: organizational management, information flows, electronic document management, interaction of information systems, support of management activities.
FOR THE DIGITAL ECONOMY IMPLEMENTATION THE GLOBAL APPROACH IS REQUIRED
A.P. Ositis, International Telecommunication Academy, president; mas. academy@yandex.ru
I.V. Fedulova, general director JSC ASVT, Ph.D.; inform@asvt.ru
The necessity of solving the problem of formation of uniform digital space of Russia on the basis of modern, reliable, protected and sustainable national telecommunication network is shown.
Keywords: information and communication technologies, digital economy, infrastructure, broadband access, next-generation communication networks, software-defined networks (SDN), network functions virtualization (NFV), 5G mobile access networks.
ISSUES OF INFOCOMMUNICATION SUPPORT FOR THE DIGITAL ECONOMY
V.A. Efimushkin, FSUE Central Science Research Telecommunication Institute, deputy director general for research, International Telecommunication Academy, chief scientific secretary, Ph.D.; ef@zniis.ru
The digital transformation of the economy is becoming a priority vector for the development of many foreign countries and Russia. The adoption of the program «Digital Economy of the Russian Federation» translates these processes from the conceptual to the practical implementation of road map activities with specific targets for indicators. The solution of the tasks is impossible without infocommunication support, which implies the creation of multitude of application solutions and services for all vertical markets, application management and services management platforms, including developers' design and implementation tools, and communication facilities based on various technologies.
Keywords: digital economy, infocommunication, management platform, communication network, communication service.
DEVELOPMENT AND IMPLEMENTATION OF SOCIO-TECHNICAL STANDARDS AND ICT SERVICES IN DEVELOPED AND DEVELOPING COUNTRIES
V.K. Saryan, FSUE NIIR, scientific consultant, professor, Dr.Sci. (Tech.); sarian@niir.ru
A.P. Nazarenko, FSUE NIIR, director of scientific and technical center, Ph.D.; apn@niir.ru
V.K. Levashov, ISPI RAS, director of scientific center, professor, Dr.Sci. (Soc.); levachov@mail.ru
Tendencies of development of information and communication technologies (ICT) and their impact on the social and economic situation in the world are considered. The contradictory nature of ICT, capable to eliminate the «digital inequality» and simultaneously to aggravate the
economic inequality in global scales is shown. Influence of ICT on modern production, services and the need of creation the socio-technical standards for the use of ICT is discussed.
Keywords: information and communication technologies, digital economy, digital inequality, information society, socio-technical standards.