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The key to the Smart Grid vision are the communication networks, which serve as the fundamental information infrastructure to provide bidirectional end-to-end data communication in the Smart Grid. To enable this bidirectional end-to-end data communication, narrowband power line communication (PLC) systems are attractive because they can be deployed over existing outdoor power lines. The paper describes...
The Internet of Things (IoT), as expected infrastructure for envisioned concept of Smart City, brings new possibilities for the city management. IoT vision introduces promising and economical solutions for massive data collection and its analysis which can be applied in many domains and so make them operating more efficiently. In this paper, we are discussing one of the most challenging issues — municipal...
In this paper the method for managing a line topology and estimating the topological parameter (length of bridge taps and direct line) are investigated. The method will be evaluated in a simulation environment. With the method and system for managing a line topology and related apparatus it is possible to provide a PLC system with information about network and line quality for performing quick diagnosis,...
The Smart Grid, as a current progressive new field, brings new possibilities and also new challenges. This paper deals with cyber security challenges in Smart Grid area. We provide a random number generator, which might be used for cryptographic purpose in low-power parts of Smart Grid network. The presented solution use hardware events and it is an effective solution for true random number needs...
The Smart City as a concept of future cities anticipates the smart and efficient traffic management. Current situation of traffic management did not offer a sufficient solution and it is not wise to use the current technology to improve the traffic situation on the city roads. This paper deals with advanced methods for optimization, the genetic algorithms, for using in urban traffic management. Implementation...
OpenSSL represents the open source tool-kit of SSL and TLS protocols. This tool-kit includes the elliptic curve cryptography (ECC) among other things. The ECC part of OpenSSL provides curves of many standards and also curves of many sizes. The ECC is a current issue of information and communication technologies and it is implemented in many communication devices. We tested the elliptic curve cryptography...
The MSP430 x5xx Families is ultra-low power micro-controller from Texas Instruments Company, which is used for good energy properties in many fields. This microcontroller could be used everywhere, where it is needed a big life-time of battery, for example sensor networks. It may be necessary in these networks and also in other fields to provide some level of security. The random numbers is the basic...
This Article deals with traffic light management in cities. Our solution is based on a sensor network, which should provide enough information for dynamic methods. This solution is about the implementation of genetic algorithms into the system of traffic light control systems to make it more efficient. The article provides a simulation tool for dynamic and static traffic light management simulation,...
Two different coupling circuits, capacitive and inductive, are introduced. These coupling circuits are analyzed by laboratory measurements. The measurements of the load impedance of coupling circuits are realized. The general discontinuity in communication path is presented in form of coupling circuit. The influence of position of coupling circuit and number of branches on transfer function is also...
The article presents an analysis of the influence of power line characteristic and power line topology parameters on transfer function. The effects of load impedance, branch length, number of branches, and time and frequency selectivity of terminal impedance are shown in this analysis. The analysis results give power line network parameters which have a significant effect on the transfer function...
The paper surveys narrowband power line communications (PLCs) in the context of Smart Grid and remote Street Lighting Control. The specifications G3-PLC and PRIME are discussed. The field test results and data rate measurements are presented for different scenarios. They demonstrate the problems encountered when the PLC signal is necessary to be sent through the switchgear, complicated topology, noisy...
The article focuses on a power line model realization based on frequency and time-variant system. The power line model is designed on a hybrid bottom-up approach based on set of topologies and random generation of topology parameters. Earlier power line modelling approaches are analysed. Based on this analysis and hybrid modelling approach, the linear periodically time-variant generator is proposed...
The article deals with the design of secure communication for terminal devices in the energy sector via networks with limited resources. The key exchange and encryption method were selected in terms of security and energy consumption. Energy consumption needs to be solved for security methods to be implemented into low-power microcontrollers. An analysis of Public Key Cryptography for implementation...
The aim of the article is to create hybrid model based on statistical derivation of power line characteristic and consequent modeling based on probability distribution. The realized model can be used for generating power line transfer functions of outdoor channels. Thanks to this generator, the evaluation of complex power line systems can be realized on the database of power line topologies or power...
The back off algorithms are significant time consumptions function in the transmitting. This paper introduces a simulation of parameters of CSMA/CA and simulation of back off function of CSMA/CA used in power line technologies. The paper also describes the basic approaches for modeling of back off function and introduces simulation of this function with significant parameter. As will be seen, a few...
Detailed knowledge of the interference scenario is necessary for power line communication (PLC) systems. PLC model with appropriate noise model creates the basics in a way of searching for the most powerful coding and modulation techniques. This paper brings an overview of PLC communication model focusing mainly on a noise scenario. Finally, a blocks of the PLC communication model are mentioned and...
The article deals with the delay of medical data in queues, caused by a bottleneck in the network. Primarily it focuses on the mathematical basis for defining the entrance traffic based on exponential distribution in the Network simulator and next it describes the possibility of calculating the delay from the trace file. Another alternative for the entrance traffic is also loading the input data from...
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