Borislav Odadzic

ICT and smart grid

Development of “Smart grid” present one of global priority with numerous of benefits, which has to be supported and promote by leading industries and governments institutions. Information and Communication Technologies (ICT) sector has to play important role because of development of modern telecommunication. This paper outlines and initially describes smart grid, smart grid architectures and smart grid management, and the crucial role of ICT in smart grid. This paper explain grid optimization, different concept of renewable energy sources and energy storage system used in smart grid, and present telecom hybrid power system as complex element of smart grid.

Evaluation of the virtual network laboratory exercises using a method based on the rough set theory

The development of computer network technologies increased the importance of network professionals education and resulted in extensive research in the field of computer science education. Virtual networking laboratories have been very popular in the past few years, especially for training and education of network professionals. These laboratories are emulated computer network environments, based on virtualization technology, and have a number of advantages comparing to classical laboratories. Even with a large number of developed laboratory platforms, there are a small number of attempts to evaluate these systems and to find out how effective they are. This paper presents an approach to the evaluation of the virtual networking laboratory, primarily by the evaluation of its exercises used for a computer‐networking course at the university. We are going to employ an approach based on the relation of indiscernibility and the rough set theory in order to produce a model based on if–then rules, starting from low‐level data. This model helps to identify the most important parts and eventual mistakes in the evaluated exercises, creating the possibility for their improvement and overall students achievement as well.

Design and “inteligent” control of hybrid power system in telecommunication

The basic requirements for telecommunication power systems are related to their safety, long life and uninterruptible power (voltage). Hybrid power system design for power feeding of telecommunication equipment has to fulfill same requirements. The subject of this paper is hybrid power system requirements, design, practical calculation and sizing of its major part: photovoltaic cell, wind turbine, diesel generators and storage battery. Focus of this paper is “inteligent” control based on weather condition and battery status in this kind of system and benefites as: fuel consumption and CO2 emmision reduction and logistic cost decreasing.

Usability of virtual network laboratory in engineering education and computer network course

The importance of educational process in the field of Computer Science and Information Technology industry, as well as the need for educating highly skilled computer network professionals implies the importance of its course syllabus and laboratory tools. This paper presents evaluation and analysis of virtual network laboratory based on virtualization technology. The virtual network laboratory architecture is shown together with the supporting laboratory exercises. Evaluation criteria for these laboratory exercises include: description of learning goals, adopted skills, compatibility with course syllabus and side knowledge, and additional skills. Lessons learned after the virtual network laboratory course, are gathered as well. Detailed analysis of the skills and knowledge that students adopted in this environment is summarized. Also, overall usability estimation in education of various engineering profiles and related computer networking and communication courses is shown.

Teaching Application Development for RFID/ZigBee Networks using Open Source Hardware

Concepts related to Wireless Sensor Networks (WSN), Machine-to-Machine (M2M) and the Internet of Things (IoT) have recently gained significant attention in university education. According to this, the need for low-cost, modular, easy-to-use and scalable platform used for building various network systems in order to provide an environment for developing and testing software applications for WSN, IoT and related technologies is very high. This paper presents an approach in creating platform based on open source hardware designed to provide an infrastructure for teaching development of software applications for WSN, in this case applications for RFID/ZigBee networks, to be used in Computing education and profession.

Testing Zigbee RF module applicability for usage in temperature monitoring systems

The applications of wireless technologies in industrial automation, monitoring and control systems has already proved itself. The technologies like IEEE 802.15.4, ZigBee, Bluetooth Low Energy, WirelessHART, Wi-Fi and others are widely used in sensor networks environments. This paper presents the approach of evaluating the applicability of open-source ZigBee RF module MeshBee® in wireless sensor environments and for potential use in monitoring and control systems. This paper presents the platform and experiment for ZigBee module evaluation. The platform presented in this paper is based on widely used microcontroller unit Arduino UNO Rev3 in combination with MeshBee® wireless module.

Open service access (OSA) business models and service level agreement aspects

This document addresses some SLA (service level agreement) topics and their possible impacts on OSA/Parlay systems and architectures. The first part of the document contains a definition for SLA, a general description of SLA characteristics and contents, and some considerations related to their usage in OSA/Parlay world. Some specific points, related mainly to OSA/Parlay gateway and framework interfaces, are also analysed. Chapter 5 extracts from the work done some conclusions and guidelines that can help network operators to deal with SLAs in OSA/Parlay context.

Approach in planning the deployment of 868 MHz RF modules in WSN scenarios

In this paper is presented approach in planning the deployment of 868 MHz RF modules in Wireless Sensor Networks scenarios. This approach covers the site-general ITU propagation model calculation compared with the real field measurement made with open-source hardware platform based on Arduino UNO and RFBee communication modules. The field measurements are made in institutional building in order to find effective way to predict best positions for wireless sensor stations in Wireless Sensor Network. The Arduino is used to make effective and low-cost platform for experiments. The RF 868 MHz modules are used in order to avoid 2.4 GHz frequency range with lot of interference. In this paper is presented the platform, test conditions, measurement results and the discussion about the achieved results with focus on the tuning of the ITU loss propagation model for the best planning of node deployment in the given scenario.

Platform for teaching communication systems based on open-source hardware

Engineering education, in the field of Computer science and Information technology, has the greatest challenges today. These challenges are shaped by the rapid growth of communication systems usage and the appearance of new technologies. Currently, there is a variety of emerging technologies such as: Bluetooth Low Energy, IEEE 802.15.4, ZigBee, 6lowWPAN, etc. In order to enable easy and fast implementation of these technologies in University courses, the building of the low-cost, flexible and scalable platform with support of these technologies is required. This paper presents an approach in building the platform for teaching communication systems and related topics based on open source hardware. The experience with this platform is presented as well.

Using Network Node Description Language for modeling networking scenarios

This paper presents an approach for designing a language for network description, leading to a Network Node Description Language (NNDL). NNDL is generic and platform independent XML based language designed to describe a complete configuration of each network node. The node description in NNDL has all necessary information for the nodes configurations, from the common IPv4 and IPv6 addressing, firewall settings, static and dynamic routing to the complete description of the network services configuration. It provides the basis for description of a wide range of virtual network laboratory scenarios. The language has been tested in a virtual network laboratory VNLab used in a university networking course. With the introduction of NNDL language, VNLab environment becomes more flexible in terms of number of available scenarios and the time needed to create and modify them. Some extensions of NNDL for documenting computer networks are also explored in this paper.