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Abstract: Professor Andrey Koucheryavy and his scientific school.

Keywords: Internet Things, flying, sensor networks, augmented reality, nanosite, tactile Internet.

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Abstract: The article explores the trade-off between energy costs and transmission delays in the system of foggy cloud computing. The problem of workload allocation has been formalized, which determines the optimal load sharing between fog and cloud subsystems.

Keywords: Cloud computing, fog computing, optimization, power consumption-delay tradeoff, workload allocation.

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Abstract: Latest achievements in the field of telecommunications (developments of the concept of Internet Things in particular) mean the using of telecommunications technologies in various spheres of human life. Medicine is one of such promising spheres. Utilization of sensor networks for monitoring the health status enables to observe vital parameters of patients in real time, and it enables to prevent a situation carrying a threat to human life. Such networks typically include a large number of devices substantially simultaneously transmit data within the same network, which may affect its performance. Research subject. The article is devoted to the problem of inefficient network resources using by medical applications of nanonetworks, it researches the traffic of medical nanonetworks applications, which operates in different modes in particular. Method. The designed operating modes of the body control unit are evaluated. Also, an imitation model has been developed that allows to investigate the traffic of medical nanonetworks. Core results. As a result of the researching, equations were obtained, which describes the dependence of the main characteristics of the network operating in the preliminary mode on variables such as the frequency of the packets appearing in the gateway, the size of the large packet, and the delay of preliminary processing. On the basis of the numerical estimates recommendations is provided which excludes the occurrence of certain types of losses which depends on the device of the body control unit. Practical relevance. When designing applications, the resulting equations allow to calculate the required parameters of the system operation, providing the necessary values of losses, load on the public communication networks and delays.

Keywords: Medical networks, body area networks, sensors, traffic modeling, e-health, nanonetworks.

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Abstract: A method for determining the average wait time of an application in a queue is considered in the case when the parameters of the processed traffic are known inaccurately. The method is based on the interval approach, in which the uncertainty of knowledge relative to traffic parameters is characterized by the equal probability of any parameter value from a given interval of its change. The analysis is given for the case when the unknown parameter belongs to the gamma distribution, which characterizes the random time intervals between the receipts of requests for the input of the node of the network.

Keywords: average waiting time in queue, interval method, Lindley equation, ns2 program.

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Abstract: The article is devoted to operability conditions and applied aspects of passive optical networks construction with wave division. New technology of this class network construction is offered, providing optical fiber using efficiency increasing due to directions division using in directions of light stream propagation and implemented on the basis of domestic electronic component base of fiber optics elements.

Keywords: Information and telecommunication networks, passive optical network with wave division, network segment capacity, optical fiber using efficiency.

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Abstract: Research Subject. This article analyzes the productivity of libraries for developing clientserver applications semantic gateways of the Internet of Things based on standard single-board computer Raspberry Pi rev. 3 Model B. As server applications for protocols MQTT and XMPP were used ready-made applications mosquitto and Ejabberd accordingly. For protocols CoAP and HTTP/2 server applications were developed independently. Processing works of this articles the following libraries were investigated: Paho-mqtt, hbmqtt, nyamuk for MQTT, aiocoap, txThings for CoAP, xmpppy, sleekxmpp, Twisted-xmpp for XMPP, hyper, hyper, Hyper-h2 for HTTP / 2. Every developed application was written using its own library version of programming high-level language Python, depending on which version library supports. Method. The main method of researching the productivity of libraries is a full-scale experiment. There were done 20 experiments for every library. Data of experiments were approximated. The outcome was aggregated in a single table. Core results. The article contains delay indexes, loads of CPU and RAM of semantic gateways in converting protocols of different libraries. Data was converted in diagrams for the clear demonstration of predominance of one library over another. Practical relevance. Processing the works of this article there was developed architecture of the experimental stand. There were given some recommendations for choosing libraries for the development of semantic gateways of the IoT, based on the protocols MQTT, CoAP, XMPP, HTTP / 2.

Keywords: Internet Things, Internet thing, libraries, delays, performance, MQTT, CoAP, XMPP, HTTP.

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Abstract: Terahertz band frequencies is an attractive resource to be utilized in next-generation highrate wireless networks. Terahertz band brings such unique advantages as several hundreds of gigahertz channel bandwidth, leading to extreme capacity of the wireless network, and high central frequency, enabling design of miniature and energy-efficient transceivers. At the same time, exploring of terahertz frequency band leads to several problems and challenges to be taken into account, including but not limited to: i) short communication range of terahertz equipment, ii) effect of molecular absorption, and iii) the consequenties of directional antennas utilization.

Keywords: Terahertz band, wireless networks, directional antennas, molecular absorption.

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Abstract: he development of modern digital data transmission systems requires the use of encryption and error-correcting coding methods, many of which are based on calculations in finite Galois fields of a large degree, mainly on addition and multiplication of field elements, of which the last operation requires more logical elements in hardware implementation and a larger number of the processor cycles with software implementation, which leads to additional delays in the implementation of resource-intensive decoding and encryption algorithms. A widely used multiplication method for microcontrollers uses discrete logarithm and anti-logarithm operations, for which it is necessary to store field elements arrays. It is a significant drawback in case of limited memory. An alternative are multiplication methods that do not require these operations, for example, the Reyhani-Masoleh algorithm. However, this algorithm has the greater complexity of the hardware scheme and the program code in comparison with the logarithmic multiplier, but it has a regular structure, which makes it possible to automate the procedure of both the formation of the hardware circuit and the generation of program code. Research subject. The authors consider the algorithm for developing a solution to the automated source code generation when implementing the multiplier over binary Galois fields generated by generating polynomials of certain types. Method. A structural analysis of the mechanisms of the work of the Reyhani-Masoleh multiplier and its software implementation is carried out. Core results. The requirements for the developing software are shown. The article contains the order and example of the software package operation, and the directions of the further development of the proposed software. Practical relevance. The proposed software will allow to automate the development of encryption and error-correcting coding systems.

Keywords: Development automation, automatic source code developing, Galois field, Galois field elements multiplication, Reyhani-Masoleh multiplier, C programming language.

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Abstract: Research subject. The article considers architecture of building communication networks, implemented at present, and also makes an overview of the prospects for the modernization network solutions based on the introduction of software-configurable communication networks. The technology of Wavelength Division Multiplexing (WDM), used for construction of transport network networks, Optical Transport Network (OTN) technology for optical networks and IP MPLS for packet switching networks is considered. The architecture of the construction of softwareconfigurable networks, their features is considered. The vector of transformation of SDN technology to T-SDN is indicated. Positive synergetic advantages have been singled out from the convergence of software-configurable networks and high-speed backbone DWDM systems. The urgency of forming models and methods of interaction between software-configurable networks and high-speed backbone DWDM systems is indicated. Method. The main method of research the interaction of softwareconfigurable networks and high-speed backbone DWDM systems is a full-scale experiment. Core results. During writing of article prototypes of a model network were developed for the research interaction of SDN networks and DWDM systems. Practical relevance. Perspectives of development educational and research laboratory are planned for the purpose of carrying out natural experiments on a research of interaction the backbone DWDM network and fragment of the software-configurable communication network. The purpose of conducting natural experiments is to analyze, determine the requirements for next-generation networks, and develop methods and models for the interaction of software-configurable networks and high-speed backbone DWDM networks.

Keywords: DWDM, software-configurable networks, Internet of Things, 5G, Tactile internet, SDN.

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Abstract: In the article mathematical model of pervasive sensor networks, allowing to estimate the energy characteristics of the process of information interaction of sensor elements.

Keywords: Wireless sensor network, energy efficiency, network topology, capacity of a radio signal.

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Abstract: At present, the concept of the Internet of Things (IoT) is becoming popular. For the Personal Area Network (PAN) and Wireless Sensor Network (Wireless sensor network, WSN), the most popular IoT technologies are Zigbee, Bluetooth, 6LoWPAN. In its turn, in large-scale local area networks use technologies such as Ethernet, WiMax, GPRS, 3G, LTE and LPWAN technologies (LoraWAN, Sigfox, NB-IoT). Research subject. In this article refers to the concept of using IoT gateways for providing interaction between the main technologies of personal and global networks. In particular, the structure of the ZigbeeLoraWAN gateway is considered. Method. A simulation model has been developed, and a research is conducted depending on the number of nodes of the Zigbee networks connected to this gateway. Core results. As a result of the researching, the threshold value of the number of end-nodes was obtained, at which there would be no packet loss. Based on the obtained results, the optimal number of Zigbee network nodes was calculated for the normal operation of the gateway. Practical relevance. When designing IoT networks using the Zigbee-LoraWAN gateway, the obtained results allow to calculate the required parameters of the gateway system, providing necessary for correct operation without loss.

Keywords: Internet of things, IoT, LPWAN, Zigbee, LoraWAN, gateway.

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Abstract: Research subject. The article is devoted to the issues of studying the development of one of the most promising areas in the development of wireless all-penetrating sensor networks (WSNs) and studying the features and prospects of the use of inter-machine communication technologies (M2M) based on the use of unmanned aerial vehicles (UAVs) for solving the problems of the smart city. Method. The study analyzed the features of building WSNs based on the use of UAVs which form a flying sensor network (FSN). There was a synthesis of the obtained data to determine the possibility of using the FSNs within the framework of the smart city architecture. Core results. In this research were considered: the specific of using UAVs for solving the problems of the smart city, the problems of servicing the sensor units and possible ways of using UAVs to achieve the automation of urban infrastructure objects. Practical relevance of this research consists in the definition of methods and possibility of using UAVs for solving the problems of the smart cities taking into account the peculiarities of its architecture within the framework of which the concept of using UAV is proposed as a mobile WSNs gateway in a distributed control system (DCS). The article considers the following provisions: smart city concept bases on M2M/IoT; goals and objectives of the smart city; basic principles of functioning of WSN/FSN; the methods of using unmanned aerial vehicles for solving the problems of smart city in particular for automation of M2M infrastructure objects in the DCS; analyzing and identify possible problems of using UAVs within the smart city.

Keywords: Smart city, unmanned aerial vehicles, inter-machine communications, an all-penetrating sensor network, Internet of Things, flying sensor network, automated information systems, information and communications technologies, distributed control system.

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Abstract: The Internet of Things can be attractive using any Internet capable technology, such as Wi-Fi, wireless sensor networks, Low power and Lossy Networks etc. These technologies are all well established and fully functional for Internet communications and as such are suitable to be a part of the backbone of the Internet of Things. However, despite all the advantages of wireless technologies, there are currently a number of potential vulnerabilities for them that have a natural and artificial nature. At the same time, it is necessary to take into account that today in the world there is a real threat of impact on wireless networks of various destructive electromagnetic influences, one of which is an intentional electromagnetic influence (IEMI). Research subject. The article is devoted to the investigation of the effects of intentional electromagnetic interference on wireless networks. Method. As a research method conducted an analytical review of existing approaches on the research of the impact of intentional electromagnetic interference on wireless networks. Core results. There are many studies both in Russia and abroad devoted to this type of impact affecting on wireless networks, but they do not fully solve the problem of protection wireless networks from IEMI. Practical relevance. It is noted that for a qualitative analysis of the problem under consideration, it is necessary to investigate the full range of destructive impact mechanisms, as well as conduct stability tests for wireless networks under specified conditions using commonly accepted diagnostic techniques.

Keywords: Communication networks, wireless technology, intentional electromagnetic interference (IEMI), protection, influence.