Wide-band Code Division Multiple Access (WCDMA)

Рижскиий техническиий университет, г. Рига, Латвия ИМИТАЦИОННАЯ МОДЕЛЬ СОВРЕМЕННОЙ HETNET. ПРОЕКТИРОВАНИЕ И ЭКСПЕРИМЕНТАЛЬНЫЕ ИССЛЕДОВАНИЯ Аннотация В работе рассматривается алгоритм проектирования имитационной модели HetNetгетерогенной телекоммуникационной сети, включающей различные среды современных систем передачи речевой информации и цифровых данных (кабельные, беспроводные), каналообразующие элементы и интерфейсы. Для имитационного моделирования и экспериментальных исследований в спроектированной HetNet использовались: цифровые VoIP телефоны, IP/Ethernet соединения с локальными компьютерными сетями, сеть SDH (на уровне STM-1) с SDH/PDH коммутационным оборудованием, радиомодемы ССМС. Разработанная HetNet, с одной стороны, обобщает современные технологии, используемые в телекоммуникационных сетях, а с другой, может использоваться в качестве имитационной модели в системах автоматики, телемеханики и связи на железнодорожном транспорте (GSM-R). Ключевые слова HetNet (гетерогенные сеть), цифровые VoIP телефоны, IP/Ethernet соединения, SDH/PDH (синхронная/плезиохронная цифровая иерархия), ССМС (сотовые сети мобильной связи).

Keywords: Covert channels in IP networks are investigated. The possibilities adversary needs to construct covert channels are given. Current methods of covert channels elimination, detection and capacity limitation are examined. Detection methods are compared using such criteria: alpha and beta errors, an ability of implementation.

Адаптивный последовательный связной интерфейс для микроконтроллерной системы управления дозаторами В статье изложена реализация адаптивного связного интерфейса в микроконтроллерных системах управления при использовании линии связи с изменяющимися параметрами. микропроцессорная техника, передача данных, системы управления, локальные сети

Научный руководитель-кандидат технических наук, доцент Б.А. Крылов Статья посвящена краткому обзору группы стандартов беспроводных сетей WiMAX. Введение Стандарты WiMAX (Worldwide Interoperability for Microwave Access) на сегодняшний день-одни из перспективных технологий в мире беспроводных сетей (рис. 1). Сети, построенные на базе WiMAX (IEEE 802.16), ориентированы на использование в городской среде (Metropolitan Area Network (MAN)). Рис. 1. Типы беспроводных сетей. PAN (Private Area Network)-частные сети; LAN (Local Area Network)-локальные сети; MAN (Metropolitan Area Network)-городские сети; WAN (WorldWide Area Network)-мировые сети

The purpose of this article is to find the most optimal solutions and hardware organization data transfer inter-module exchange on-Board automatic control systems. Reviewed and identified the most feasible channels for inter-module data exchange used in the creation and implementation of automatic control systems. Describes the approach used when constructing automatic control systems taking into account the specifics of the modules, problems of hardware of the organization and characteristics of the system that support some standardization and choice of interface is determined by the respective indices. Presents and discusses schemes of connections of the components of automatic control system through various channels, the principles of their use, the characteristics of each and the specifics of the work. The recommended decision on the selection of the types of data transmission lines, the characteristics of the channel and the technical interface device when designing multiplexed systems. The proposed concept of the control and basic control devices that involve the transfer of management of the system. Considered the most important operational characteristics of ship automatic control systems, including self diagnostics. Lists the hardware requirements for the organization of the multiplex channels. Formed a generalized block diagram of multiplex terminal channels with a detailed description of the used blocks. Also recommendations on issues of functional and physical division of the whole system when using the appropriate blocks. Proposed recommendations and concepts will allow you to find the best solution for the design and implementation of on-Board automatic control systems using multiplex and radial channels for organization of data transmission systems inter-module exchange. Keywords: automatic control system, inter-unit exchange of information, the information exchange system, the channel interface, radial channel, multiplex channel, the controller, the concept of access control, the concept of the control unit, terminal of multiplex channels.

The purpose of this article is to find the most optimal solutions and hardware organization data transfer inter-module exchange on-Board automatic control systems. Reviewed and identified the most feasible channels for inter-module data exchange used in the creation and implementation of automatic control systems. Describes the approach used when constructing automatic control systems taking into account the specifics of the modules, problems of hardware of the organization and characteristics of the system that support some standardization and choice of interface is determined by the respective indices. Presents and discusses schemes of connections of the components of automatic control system through various channels, the principles of their use, the characteristics of each and the specifics of the work. The recommended decision on the selection of the types of data transmission lines, the characteristics of the channel and the technical interface device when designing multiplexed systems. The proposed concept of the control and basic control devices that involve the transfer of management of the system. Considered the most important operational characteristics of ship automatic control systems, including self diagnostics. Lists the hardware requirements for the organization of the multiplex channels. Formed a generalized block diagram of multiplex terminal channels with a detailed description of the used blocks. Also recommendations on issues of functional and physical division of the whole system when using the appropriate blocks. Proposed recommendations and concepts will allow you to find the best solution for the design and implementation of on-Board automatic control systems using multiplex and radial channels for organization of data transmission systems inter-module exchange. Keywords: automatic control system, inter-unit exchange of information, the information exchange system, the channel interface, radial channel, multiplex channel, the controller, the concept of access control, the concept of the control unit, terminal of multiplex channels.

In code division multiple access (CDMA) systems, the capacity of forward link (FL) communication to mobile receivers is limited primarily by co-channel interference (CCI). Adaptive antenna arrays (AAAs) that use antenna arrays along with advanced signal processing at the base station (BS) have been proposed to mitigate this limitation. For a 3G CDMA cellular network, where each BS equipped with an AAA serves mixture of voice and data users within its coverage, we study FL capacity and investigate the effects of different factors (array topology, multipath angle spread, data rate, and beamforming algorithm) on this capacity under Rayleigh fading channel. By modeling the instantaneous signal-to-interference power ratio received at the mobile, we derive the system outage equation that considers blocking of either desired voice or data user. Simulation results show that for the same element spacing and number of antenna elements per cell, the uniform circular array (UCA) topology results in larger capacity than the sectorized uniform linear array (ULA) topology does, and that a larger angle spread or data user rate reduces FL capacity.

Estimations of levels of the equivalent isotropic radiated power in frequency channels of GSM 900/1800 base stations (BS) which are required and sufficient for the effective utilization of radio-frequency resource allocated to the GSM network, are resulted. Analysis is performed for various BS antenna heights, various population density, various levels of real sensitivity of BS radio reception, various cluster dimension of GSM network frequency planning and different specific traffic intensity.

Базовый анализ стандартов беспроводной передачи данных и перспективы их развития. Кратко рассмотрены стандарты передачи данных в беспроводных сетях, описаны их основные характеристики, достоинства и недостатки В настоящее время тяжело представить жизнь современного человека без использования беспроводных систем связи. Это связанно с тем, что беспроводные сети не имеют конкурентов по скорости организации сети, ее себестоимости, мобильности абонентов, скорости передачи данных и сфере предоставляемых услуг. Наравне с традиционными видами услуг телекоммуникаций, такими как передача голосовой информации, данных, пользование интернетом, все больше пользователей нуждаются в более усовершенствованных услугах. Именно поэтому спрос на услуги и скорости привел к стимулированию создания новых технологий для удовлетворения потребностей абонентов. Беспроводная сеть (Wireless Network)-вид вычислительной сети, использующий для связи и передачи данных на расстояние между узлами и компонентами высокочастотные радиоволны, а не кабельные соединения. Это расстояние может быть, как малой (несколько метров), так и очень большим (сотни километров). Основой любой беспроводной сетевой технологии служит ее протокол. Как правило, протокол регламентирует топологию сети, маршрутизацию, адресацию, порядок доступа узлов сети к каналу передачи данных, формат передаваемых пакетов, набор управляющих команд для узлов сети и систему защиты информации. Все многообразие протоколов беспроводной передачи данных можно классифицировать несколькими различными путями, выбрав в качестве основного один из параметров, например, топологию сети, скорость работы или алгоритмы безопасности. Наиболее распространенный метод классификации в технической литературе исходит из максимального радиуса действия беспроводной сети. 1 WPAN (Wireless Personal Area Network)-беспроводная персональная сеть. Применяется для соединения между собой личных устройств, таких как ноутбуки, телефоны, мышки, плееры, наушники, миниатюрные датчики, так и для связи их с сетями более высокого уровня. Радиус действия WPAN составляет от нескольких метров до нескольких десятков метров. Стандарты, определяющие методы функционирования сети, описаны _______в семействе спецификаций IEEE 802.15. Один из них Bluetooth (IEEE 802.15.1). 2 WLAN (Wireless Local Area Network)-беспроводная локальная сеть. Радиус действия этого класса сетейнесколько сотен метров, достаточно для покрытия помещений и небольших зданий. Эта категория беспроводной сети предназначена для связи между собой различных устройств, подобно LAN на основе витой пары или оптоволокна, и при этом характеризуется высокой скоростью передачи данных на относительно небольшие расстояния.

Has been proposed practically implemented methods of random messages coding and decoding with usage of Reed-Solomon codes. Has been shown that the random coding by codes of Reed-Solomon into the system of transmission of information through the channel with a wire-tap channel provides (in some cases essentially) more efficient protection of information using higher speed of transmission in comparison with earlier investigated classes of binary linear codes.Предложены практически реализуемые способы случайного кодирования и декодирования сообщений с использованием кодов Рида-Соломона (РС) в системе передачи информации по каналу связи с отводом. Показано, что случайное кодирование на основе кодов РС обеспечивает (в ряде случаев существенно) более высокую стойкость защиты информации при большей скорости передачи по сравнению с рядом ранее исследованных классов двоичных линейных кодов

Non-asymptotically bounds for the probability of optimal messages decoding in the wiretap channel of a information transmission system with random coding by a arbitrary resilient function over an Abelian group, are obtained. Algorithms of random messages coding and decoding in main channel which use non-linear systhematic codes, are described. An example of the information transmission system with random coding by Preparata codes is considered.Получены неасимптотические границы вероятности оптимального приема сообщений в отводном канале системы передачи информации со случайным кодированием, построенной на основе произвольной устойчивой функции над конечной абелевой группой. Описаны алгоритмы случайного кодирования и декодирования сообщений в основном канале с использованием нелинейных систематических кодов. Рассмотрен пример системы передачи со случайным кодированием, построенной на основе кодов Препараты

A6stracl-This paper deals with the process of constructive and destructive addition of multipath signals in a Rayleigh fading channel. It derives closed formulas associating the number uf multipaths with the Rayleigh statistics of the channel and it displays the accuracy of these formulas by means of simulation. The primary conclusion is that multipaths add constructively with high prohahility, thus the more the multipaths the larger the mean power level experienced at the receiver. In this context, multipath propagation exhibits a beneficial property that could he exploited for designing improved performance receivers. Zrrdex terms-Multipath comhining, Multipath fading, Rayleigh fading, Mobile channels. I. INTIIOLXJCTION IRELESS communication channels are characteri-W zed as multipath propagalion channels because the signal at the rcccivcr is usually composed of several delayed replicas or the transmitted signal. The effects of multipath propagation are hoth detrimental and bcncficial. On tlic one hand, lack of multipath propagation would rcndcr mobile communications almosl impossible in heavily structured cnvironments where line-of-sight (LOS) communication is difficult to achieve. Addilionally, multipath propagation develops a form of time diversity, which in wideband transmission systems can be effectively exploited to provide improved performance. On rhc other hand, multipath propagation introduces severe signal fluctuation, commonly rcfcrrcd to as fading, at a moving receiver in a narrowband transmission system. This fading phcnomenon rcnders mobilc channels particularly hostilc communication cnvironments; it is well known [1,2] that common modulalion schemes p c r h u far worse in a mobilc cnviionmcnt than in a fixed one. The primary source of signal fading is the large variation in relative phase of tlic multipath signals cxpericnccd as the rccciver quickly moves ovcr distances as small as half a wavelength. It is commonly quoted that fading is developed by the constructive and destructivc addition of llie multipath components [ 11. This work has been supported in part by Ihc National Scicnce and Engineering Research Council (NSERC) and the Advanced Systcins lnstitutc (A S) of HC through a Visiting Fellowship Program.

Возникший спрос на качественную связь дал толчок к развитию и внедрению сетей нового поклонения 5G. В материале работы рассмотрено применение метода построения сети пятого поколения, на основе использования метода комплексного критерия для повышения точности количества и местоположений базовых станций. Исследуемый метод позволяет учесть основные характеристики работы мобильной сети, показатели качества обслуживания, а также оценить стоимостные характеристики. Также, представлены основные критерии и требованиям к ним при проектировании мобильной сети поколения 5G с применением метода многокритериальной оптимизации. Ключевые слова: 5G, мобильные сети, параметры сети, метод многокритериальной оптимизации, критерий надежности передачи данных, критерий скорости передачи, критерий материальных затрат.

Для критичної діляни магістралі мультисервісної мережі запропонований метод прогнозу фрактального трафіа, який не потребує оперативного обчислення показника Херста.For a critical site of a highway a multiservice network the method of the forecast fractal traffic, not demanding operative calculation of a parameter of Hurstis offered

The aim of the work is to investigate statistical characteristics of multimedia services traffic of IP-network on the basis of the service information analysis of package headings. The investigation method is mathematical mod-eling in the Mathcad 14 environment. As a result of the investigations, a mathematical apparatus allowing the fulfillment of a point and interval assessment of separate constituents of voice messaging quality and also the decisionmaking regarding the satisfaction degree by users with the service offered. In the work on the basis of measurements with the aid of the Wireshark program and the TCP protocol there are carried out the investigations of permissible fields in a quality parameter variation of voice message perception. A stochastic tie is revealed between transfer standard quality parameters by means of plotting diagrams and histograms of the assessments of these parameters mutual impact. The most significant indices of transfer quality parameters form th...

В статье показывается актуальность тестирования запоминающих устройств современных вычислительных систем. Представляются математические модели неисправностей запоминающих устройств и эффективность их обнаружения, в частности, сложных кодочувствительных неисправностей типа PNPSFk, на базе классических маршевых тестов. Приводятся предельные оценки полноты покрытия подобных неисправностей в зависимости от количества запоминающих ячеек, участвующих в неисправности. Обосновывается необходимость синтеза маршевых тестов, характеризующихся высокой эффективностью обнаружения PNPSFk неисправностей. Определяется понятие примитива, обеспечивающего условия активизации и обнаружения различных видов PNPSFk. Приводятся примеры анализа и синтеза маршевых тестов, имеющих различную полноту покрытия PNPSFk неисправностей. Синтезируется маршевый тест March OP, характеризующийся максимальной полнотой покрытия

Чичкарев, Е. А. Метод формирования векторной модели чертежа детали / Е. А. Чичкарев, В. С. Молчанова // Университетская наука-2016 : в 4 т. : тез. докл. междунар. науч.-техн. конф. (Мариуполь, 19-20 мая 2016 г.) / ПГТУ. – Мариуполь, 2016. – Т. 2. – С. 147–148

Cross layer security network is used to improve the security of image transmission over optical fiber and Image confidentiality is increased by means of this method. To evaluate the Security performance of cross layer security network, encoding schemes is performed at the different network layers. It is difficult for the eavesdropper to intercept the code as it provide cross layer security for both physical and datalink layer. The original image is recovered if user use correct decoder and encryption algorithm. Hence it achieves higher confidentiality than other network.

In this paper we study an accurate interference rejection capability of a minimum-variance polarization sensitive (MVPS) beamformer using a uniform linear array of crossed dipoles. The interference cancellation is done in the spatiopolarized domain since MVPS beamformer search in both the direction of arrival and polarization domains. Also, MVPS beamformer has the capability of handling more signals than the scalar array having the same number of sensors in a single beam. We have also analyzed that there will be no beam when the desired and interference EM signals are same in nature.

В статье обоснована важность аутентификации пользователя при доступе к автоматизированной системе. Показано, что для её осуществления широко используется биометрическая аутентификация по голосу. Наряду с явными преимуществами последних существуют и определённые ограничения в применении таких биометрических систем, связанные с изменчивостью речевого сигнала, обусловленной индивидуальным произношением диктора, различиями в условиях записи речевого сигнала при регистрации и идентификации пользователей, наличием шумов и искажений в момент его регистрации. Проведенные экспериментальные исследования позволили сделать вывод о том, что в условиях неблагоприятных акустических шумов качество речевого сигнала изменяется в достаточно широком диапазоне, что приводит к снижению эффективности аутентификации пользователя автоматизированной системы. Одним из решений данной проблемы является учет параметров качества обрабатываемого речевого сигнала в процессе доступа пользователя к автоматизированной...

The use of adaptive antenna systems enables the network operators to increase the wireless network capacity, where such networks are expected to experience an enormous increase in the traffic. This is due to the increased number of users as well as the high data rate service and applications. In addition, adaptive antenna systems offer the potential of increased spectrum efficiency, extended range of coverage and higher rate of frequency reuse. The purpose of this article is to give an overview of the technology and the fundamental system model and used algorithms.

Network stacks currently implemented in operating systems can no longer cope with the packet rates offered by 10 Gbit Ethernet. Thus, frameworks were developed claiming to offer a faster alternative for this demand. These frameworks enable arbitrary packet processing systems to be built from commodity hardware handling a traffic rate of several 10 Gbit interfaces, entering a domain previously only available to custom-built hardware. In this paper, we survey various frameworks for high-performance packet IO and their interaction with a modular frameworks and specialized virtual network functions software for high-speed packet processing. We introduce a model to estimate and assess the performance of these packet processing frameworks. Moreover, we analyze the performance of the most prominent frameworks based on representative measurements in packet capturing scenarios. Therefore, we provide a comparison between them and select the area of applicability.

Работа посвящена анализу современных тенденций в области беспроводных устройств диапазона 2,4 ГГц. Рассматриваются новые специализированные интегральные микросхемы, предназначенные для использования в беспроводных приложениях для передачи данных от удалённых объектов. Проанализированы результаты разработки и испытаний беспроводного датчика собранного на микроконтроллере MSP430F2013 (Texas Instruments) и приёмопередатчике CC2420 (Chipcon) А. И. Б ы б к а Старший преподаватель Кафедра "Сети связи" Харьковский национальный университет радиоэлектроники (ХНУРЭ) просп. Ленина, 14, г. Харьков, Украина, 61166 Контактный тел.

Modern onboard equipment complexes (OEC) utilize AFDX and FC-AE-ASM-RT switched networks implementing a virtual link-based approach to real-time data transfer. The main drawback of these networks is their limited or absent support for dynamic reconfiguration of virtual links, which makes impossible the dynamical recomposition of OEC operation modes, particularly in case of multiple equipment failures. To remove these drawbacks, in this paper an approach is proposed to use software-defined networks (SDN) as onboard real-time networks. The proposed approach is based on implementation of a virtual link-based technology (similar to those used in AFDX and FC-AE-ASMRT) in an SDN supporting OpenFlow 1.3 protocol. The approach was implemented as a functional prototype and experimentally evaluated in a virtual network environment based on Ofsoftswitch13 software SDN switches and RUNOS controller. The experiments indicated that the proposed data exchange scheme allows the transfer of messages...

In code division multiple access (CDMA) systems, the capacity of forward link (FL) communication to mobile receivers is limited primarily by co-channel interference (CCI). Adaptive antenna arrays (AAAs) that use antenna arrays along with advanced signal processing at the base station (BS) have been proposed to mitigate this limitation. For a 3G CDMA cellular network, where each BS equipped with an AAA serves mixture of voice and data users within its coverage, we study FL capacity and investigate the effects of different factors (array topology, multipath angle spread, data rate, and beamforming algorithm) on this capacity under Rayleigh fading channel. By modeling the instantaneous signal-to-interference power ratio received at the mobile, we derive the system outage equation that considers blocking of either desired voice or data user. Simulation results show that for the same element spacing and number of antenna elements per cell, the uniform circular array (UCA) topology results in larger capacity than the sectorized uniform linear array (ULA) topology does, and that a larger angle spread or data user rate reduces FL capacity.

Planning sensor locations can potentially economize the receiver cost by minimizing the hardware and computational needs, while satisfying a predetermined design criterion. In this paper, we consider a sparse array receive beamformer design approach for Multi-Functional Antennas (MFA), operating in different frequency bands. In this approach, antenna positions are selected from uniformly spaced locations that are served by a limited number of transceiver chains. The design objective is to maximize the beamformer output Signal-to-Interference-plus-noise-ratio (MaxSINR) for desired sources with disjoint frequency bands operating in a wideband jamming environment. The problem is solved efficiently through alternating direction method of multipliers (ADMM) and simplified to parallel quadratically constraint quadratic programs (QCQP) with a single associated constraint. The re-weighted group sparsity is adopted to ensure a common sparse configuration across all frequency bands. The effic...

We consider the problem of target localization in MIMO radar with arbitrary planar arrays. A method for mapping a two-dimensional (2D) arbitrary transmit array into a uniform rectangular array or an L-shaped array with uniform element displacement is developed. The uniform structure of the mapped array enables applying the computationally efficient 2D root-MUSIC algorithm for estimating the elevation and azimuth parameters of the targets. The transmit array interpolation is achieved by properly designing the mapping matrix via solving a minmax convex optimization problem. We show that there is a tradeoff between the mapping accuracy within a certain desired 2D spatial sector and the sidelobe levels. The performance of the root-MUSIC for the mapped transmit array is shown to achieve the performance of the root-MUSIC associated with a perfect uniform array of the same shape as the mapped one. Simulation examples are used to validate the effectiveness of the proposed method.

Finding new approaches for asymmetric encryption / decryption process represents a milestone in cryptographic research and development. In this paper we introduce new algorithm for asymmetric encryption by utilizing two mathematical operators called Pentors and Ultra Pentors. The public and private key in this algorithm represent a quadruple of parameters which are directly dependent from the above mentioned operators. The strength of the algorithm resides in the inability to find the respective Pentor and Ultra Pentor operator from the mentioned parameters.

Finding new approaches for asymmetric encryption / decryption process represents a milestone in cryptographic research and development. In this paper we introduce new algorithm for asymmetric encryption by utilizing two mathematical operators called Pentors and Ultra Pentors. The public and private key in this algorithm represent a quadruple of parameters which are directly dependent from the above mentioned operators. The strength of the algorithm resides in the inability to find the respective Pentor and Ultra Pentor operator from the mentioned parameters. http://www.tojsat.net/index.php/tojsat/article/view/35

An improvement of Signal-to-Interference Ratio (SIR) at the base station of a wireless communication system can be obtained using a suitable choice of an array antenna. In this paper we consider Concentric Circular Antenna Array (CCAA) which can be used for adaptive antenna systems. A new adaptive algorithm, called least mean square-least mean Square (LLMS) algorithm, has been proposed for different applications of array beamforming. Unlike earlier LMS algorithm based techniques, the proposed algorithm derives its overall error signal by feeding back the error signal from the second LMS algorithm stage (LMS2) to combine with that of the first LMS algorithm section (LMS1). In this paper, we employ the LLMS beamforming algorithm for a CCAA system. The mathematical model of CCAA is analyzed. Computer simulation results show that employing LLMS algorithm is superior in convergence; and beam pattern performances over earlier LMS based algorithms. Furthermore, CCAA LLMS beamforming is mor...

A suitable use of the antenna array in the wireless communication system can result in improvement in the Signal to Interference Ratio (SIR). SIR is in general function of antenna type, and the number of the antenna elements, angle of arrival and the polarization of the desired source. In this paper we take into consideration uniform linear array of dipole and cross dipole antenna and study the effect of different polarization and varying the number of elements on the SIR. A comparison between uniform linear array of dipole and cross dipole antenna shows that cross dipole antenna have better performance in terms of SIR and is more optimize in term of elements.

An improvement of Signal-to-Interference Ratio (SIR) at the base station of a wireless communication system can be obtained using a suitable choice of an array antenna. In this paper we consider Concentric Circular Antenna Array (CCAA) which can be used for adaptive antenna systems. A new adaptive algorithm, called least mean square-least mean Square (LLMS) algorithm, has been proposed for different applications of array beamforming. Unlike earlier LMS algorithm based techniques, the proposed algorithm derives its overall error signal by feeding back the error signal from the second LMS algorithm stage (LMS 2) to combine with that of the first LMS algorithm section (LMS 1). In this paper, we employ the LLMS beamforming algorithm for a CCAA system. The mathematical model of CCAA is analyzed. Computer simulation results show that employing LLMS algorithm is superior in convergence; and beam pattern performances over earlier LMS based algorithms. Furthermore, CCAA LLMS beamforming is more robust compared with other algorithms when operating in the presence of Rayleigh fading. Fidelity of the recovery signal of all algorithms under test is demonstrated by means of the resultant values of Error Vector Magnitude (EVM) and scatter plots.

Предложена математическая модель транспортного протокола с механизмом прямой коррекции ошибок. Показано, что применение механизма ведет к росту пропускной способности канала при определенных значениях многомерного признакового пространства протокольных параметров, характеристик тракта передачи данных и механизма прямой коррекции ошибок. Представлены результаты численного анализа зависимости прироста пропускной способности транспортного протокола с прямой коррекцией ошибок от параметров корректирующего механизма, достоверности передачи протокольных блоков данных и длительности круговой задержки. Ключевые слова: транспортное соединение; пропускная способность; цепь Маркова; прямая коррекция ошибок; размер окна; длительность тайм-аута; круговая задержка.

Finding new approaches for asymmetric encryption / decryption process represents a milestone in cryptographic research and development. In this paper we introduce new algorithm for asymmetric encryption by utilizing two mathematical operators called Pentors and Ultra Pentors. The public and private key in this algorithm represent a quadruple of parameters which are directly dependent from the above mentioned operators. The strength of the algorithm resides in the inability to find the respective Pentor and Ultra Pentor operator from the mentioned parameters. http://www.tojsat.net/index.php/tojsat/article/view/35

/////// Citation - A. P. Nikiforov, Solving the Problem of Balancing Algorithms for Relay Protection and Automation Using Game Theory, IEEE 6th International Conference on Energy Smart Systems (2019 IEEE ESS), pp. 177-182, 2019, 978-1-7281-2159-8/19/$31.00©2019 IEEE, IEEE Catalog Number: CFP19U02-USB, ISBN: 978-1-7281-2159-8, DOI: 10.1109/ESS.2019.8764238, Translate DOI: 10.13140/RG.2.2.33860.17288, Kyiv, Ukraine, (стаття),  Scopus, Web of Science
url: https://www.scopus.com/authid/detail.uri?authorId=57191825673,
https://publons.com/researcher/2303561/andrey-petrovich-nikiforov.
Переклад статті DOI: 10.13140/RG.2.2.33860.17288. /////// The development of distribution grids at 6–35 kV in accordance with the concepts of the smart grid, digital cells, digital substations, and outsourcing of services can lead to improvements in methods for describing the structures of relay protection and automation devices. A structural information method is developed here that describes the successive stages of the algorithms necessary for structural information processing in the devices, through a formal presentation of information about the network. Following this, a description is given of the information structures of transients in the network and high-voltage equipment networks. A numerical evaluation is carried out of the sufficiency of the amount of signal information for automatic decision-making on disconnecting a damaged network segment. The task is set in a series of previous works, based on the results achieved in improving recognition algorithms and structures of protection devices against single-phase earth faults in networks with a Petersen coil. This article proposes a numerical definition of the equilibrium point between selectivity and blocking using game theory. A comparison is given of the results and the published solution using dynamic functional modelling.
Keywords — relay protection, automation, smart grid, protection against single-phase earth faults, semantic signal, structural-information method.

Cross-polarized antenna selection schemes lead to a considerable decrease in overall cost of system and size of the hardware without sacrificing the advantages of multiple-input multiple-output systems. In this work, we present a study of receive antenna selection based on measurements obtained with a tripole antenna pair. From the measurement data we extract the selection gains associated with triple polarized channels for a different number of antenna combinations at the receiver. The obtained results show the effectiveness of dealing with antenna selection schemes along with orthogonal antennas, providing higher gains in most of the cases.