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Abstract: Having taken for attention today's diversity of network technologies and devices, a variety of manufacturers, there are many problems of their simultaneous work and the necessity of creation and adoption of specialized standards and communication protocols. Research subject. The various standards and protocols proposed by the IEEE, IETF and ITU for use within the concept of the Internet of things are considered in the article. Method. The article describes protocols of the application, transport, network and link layers of the TCP/IP model. Also, protocols developed specifically to meet IoT requirements are considered. Core results. A brief description of the protocols and the operation principle of each of them are given. Practical relevance. The review article leads to a more correct choice of protocols when building a network, detecting and managing devices, establishing interaction between objects of the Internet of things.

Keywords: Internet of things, IoT protocols, IoT standards, D2D, М2М.

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Abstract: In the device-device communication paradigm (D2D) in 5G networks, an efficient infrastructure is created, allowing the use of various smart urban applications, such as public safety. In future smart cities, the tight deployment of wireless sensor networks can be integrated with 5G networks using D2D communications. D2D communication provides direct communication between neighboring user devices using cellular or special communication channels, thereby improving spectrum utilization, system capacity and network energy efficiency. This article discusses the hierarchical communication architecture of D2D, in which the centralized software network controller (SDN) interacts with the cloud head devices (CH) to reduce the number of requested LTE communication channels, thereby improving power consumption. This paper considers the reliability and potential of the architecture, presenting a public safety scenario when part of the network is disconnected due to any disaster.

Keywords: Device – device Communication, SDN, fifth generation networks, 5G, D2D.

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Abstract: The technology development of data transmission demands a qualitive revolution in measurement devices, especially in monitoring systems. Research subject. The issue of the article is Optical signal – to – noise measurement (OSNR). Method. The existing methods of OSNR and noise evaluation are described. The idea of reference OSNR measurement is proposed. Practical relevance. Actually OSNR can be measured indirectly or directly with transmission interruption. The absence of universal algorithm determines the practical development necessity, as costumer asks to evaluate OSNR during the acceptance test.

Keywords: DWDM, OSNR, coherent systems, ASE, nonlinear effects.

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Abstract: In software-defined networks, as is known, the main fundamental feature is the division of functions that are responsible for data transmission, and the removal of management applications to a separate server (controller). Such technologies allow to improve the quality of service and reduce the costs of network operation. The same advantage is the simplification of network management, cheaper equipment and the development of previously inaccessible services. In this paper, we propose a method for configuring the switch OpenFlow buffer. As a result, we are considering the possibility of reducing the processing speed of the packet in the node, also using the GNS3 tool, we tested the SDN network and the segment using our script.

Keywords: SDN, openflow, buffer, script, modeling, GNS3.

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Abstract: Information technology of geochronological tracking form the methodological and program apparatus for automation of selected class of research tasks, connected to fusion of biographical and geographic data based on GIS. This paper is dedicated to the study of qualitatively new capabilities of such GIS-apparatus obtained in the process of its development.

Keywords: Geographic information system, GIS technologies for history researches, geochronological track, geochronological tracking, GIS-based research.

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Abstract: Research subject. Evaluation of the digital quality of services, which are software-defined applications of info-communication network. Method. Analytical. Comparative approach to measurements based on cloud-based geographically distributed computing tools. Core results. It suggests some approaches to the definition of models and methods of comparative evaluation of modern and advanced digital services quality. Also the functional scheme is proposed and the model of the geographically-spaced system based on the Microsoft Azure cloud platform is developed. Practical relevance. The study is the first stage in the development of appropriate application systems for the comparative assessment of the quality of providing services for software-defined applications.

Keywords: Web-technologies, quality assessment, QoS, mathematical model.

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Abstract: The development of modern digital data transmission systems requires the use of encryption and error-correcting coding algorithms, which are based on calculations in finite Galois fields of a large degree. In this case, the basic operations are multiplication and addition. The operation of multiplication requires a large number of logical elements in the hardware implementation and a large number of processor cycles in software implementation, which leads to significant delays in the computation of resource-intensive decoding and encryption algorithms. However, many algorithms for multiplying the elements of a finite field have a regular structure, which makes it possible to automate the procedure of both the formation of the hardware circuit and the generation of multipliers program code. Research subject. The article is devoted to the authors's developed automated source code generation software for creating binary Galois field elements multipliers. The question of comparing the speed of multipliers of different types using this system is considered separately. Method. The structure of the developed software is considered. Modeling of software processes was carried out, which made it possible to compare the speed of the main multipliers of field elements. Core results. A number of popular algorithms for multiplying the elements of the Galois field from the viewpoint of the speed of their software implementations are compared, and recommendations are given on the choice of algorithms for constructing multipliers in the development of data transmission systems. Practical relevance. The developed software allows to automate the procedure for developing systems of error-correcting coding and encryption.

Keywords: development automation, automatic source code developing, Galois field, Galois field elements multiplication, Reyhani-Masoleh multiplier, Karatsuba multiplier.

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Abstract: Today, robotics is a young and progressive section of applied science. One of the main problems of developing software for robots is excessive complexity in the design of software components controlling the robotic system. Especially complexity arises in the development of mobile robots. These robots are equipped with energy-efficient hardware devices with low performance in order to increase autonomy. In this paper, we study modern non-blocking algorithms for inter-thread synchronization and zero-copy serialization algorithms to create a high-performance multithreaded modular robotic system. This paper presents two prototypes of framework with using thread-safe non-blocking queues of functors. The benchmark results of message distribution system shows a performance gain of 6-8 times compared to the Boost Signals2 library. There is also a linear increase in performance in multi-core systems with an additional number of threads. Developed algorithms can be used in software development both for low-power hardware platforms, and in productive high-loaded systems.

Keywords: Robotics, asynchrony, multithreading, lock-free, zero-copy.

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Abstract: At the moment popularity of robotics and game development is dramatically rising. One can see a sufficiently high degree of mutual integration of these two areas. For example, in almost every project related to these areas a decision-making system is required. The most popular way of creating decision-making systems is state machines. However, this way cannot always allow to create effective decision-making systems without high complexity. This paper introduces a method of creating state machines using probabilities for the description of situations in the external environment in which this system working. Also a way of combining machine-learning algorithms with modified state machine is presented in this paper. In addition, this paper includes presentation of framework for creating decision-making systems in robotic platform. Presented modification of state machines allows to create reactions of decision-making systems to the situations of external environment, which will require high labor costs while using traditional state machines, with ease. Combining this modified state machine with machine-learning algorithms allows to increase effectiveness of the created decision-making system. Results of the research are confirmed through practical realization of the proposed method in the test strategy for the gaming simulator.

Keywords: Robot, robotics, games, intellect, decisions, automates, probability, C++.

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Abstract: The article analyzes the technical aspects that enhance the effectiveness of public safety systems for megacities and defines the main directions of development and improvement of technological solutions "Safe City" by creating a single information space for the processes of receiving, storing and processing video information. Proposals are given to create and upgrade existing intelligent video surveillance systems to open, scalable and interoperable solutions by using the open ONVIF protocol and adding the necessary functionality to create systems of any scale.

Keywords: Metadata, video surveillance system, Safe City, ONVIF.

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Abstract: In the article, SDN-networks are considered as the next generation of network tech-nologies. Separation of Control Plane from network devices allows you to better op-timize both. The SDN controller monitors the entire network and configures the SDN switch stream tables, such as Open Flow switches, through the APIs. The manage-ment process can be either reactive (in response to packets) or proactive through secure channels. Today many controllers are available, depending on the programming language used in them and the purposes of their operation. For example, the NOX controller is based on C ++ and Python; The POX and Ryu controllers work in Python; Beacon and Floodlight use Java.

Keywords: SDN-network, SDN-switch, controller, programming language.