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Wireless Sensor Network Simulation Model in J-Sim Tool
Vrzal, Tomáš ; Morávek, Patrik (referee) ; Šimek, Milan (advisor)
This thesis deals with the issue of wireless sensor networks and communication protocols. Is explained of what the network is composed, what standards are used and in what sectors are most often used. The main scope of work is to introduce with the localization algorithms using in WSN. Algorithms are clearly divided into groups according to the methods used. In work is describes the structure used simulation tools J-Sim, for creating a wireless sensor network. To create network will be then applied different localization algorithms, which must first be implemented in a simulator using Java code. All generated classes and the algorithms are detailed described in the work. Results from simulations are detailed and graphically displays for individual localization algorithms.
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Performance of Anchor-Free Localization in Wireless Sensor Network
Nováček, Aleš ; Morávek, Patrik (referee) ; Šimek, Milan (advisor)
Many applications that use senzor data from a wireless senzor network require corresponding node position information as well, information from the senzors is useful only if node location information is also available. There are many ways to get information about location of senzor, but some are expensive and inefficient. My work presents fully decentralized algorithm AFL (anchor-free localization) for localization of wireless sensors. Aim of my master´s thesis is to describe main features and advantages of AFL and to create program that simulates localization process.
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Web interface for sensor network monitoring
Vajsar, Pavel ; Šimek, Milan (referee) ; Morávek, Patrik (advisor)
The aim of this work is to design and create an application that will allow monitoring of wireless sensor networks. The basis of the project is to design a database that is capable of storing data acquired from wireless sensor networks. The main requirement for the design is versatility, which flows from the requirement to use the database for broad range of applications implementing wireless sensor networks. The application itself is designed to be the most versatile and modular, which means that modules provide specific monitoring services. The application is able to monitor the real wireless sensor network through designed and implemented connector. For implementation J2EE (server side) and Adobe Flex/Air (client side) technologies are used.
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Localization and its influence on other processes in a wireless network
Zemánek, Karel ; Šimek, Milan (referee) ; Morávek, Patrik (advisor)
The masters thesis concerns localization and its influence on other processes in a wireless network. The first part of the thesis is devoted to the study of localization algorithms in wireless sensor networks. The second and third part is devoted to the description of hierarchiacal aggragation and Greedy perimetr stateless rating (GPSR). The fourth part presents implementation of GPSR protokol into the MATLAB simulation tool. It contains the description of specific m-files, that are use for simulation. The fifth part deals with the simulation itself. And the final part presents simulation results.
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Centralization and maintenance of distributed information
Valčák, Richard ; Jelínek, Mojmír (referee) ; Morávek, Patrik (advisor)
The master’s thesis deals with the web mining, information sources, unattended access methods to these sources, summary of available methods and tools. Web data mining is a very useful tool for required information acquiring, which is used for further processing. The work is focused on the proposal of a system, which is created to gather required information from given sources. The master’s thesis consists of three parts, which employ the developed library: API, which is used by programmers, server application for gathering information in time (such an exchange rate for instance) and example of AWT application, which serves for the processing of tables available on the internet.
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Web applications with respect to accessibility
Kříž, Tomáš ; Malý, Jan (referee) ; Morávek, Patrik (advisor)
This master’s thesis deals with problems of the web applications with respect to accessibility. At first it describes accessibility of the web pages. There are mentioned main reasons and initiatives for making accessible web pages. The first chapter is also aims to handicapped users. The handicapped users are separated to groups according to their handicap and impacts on accessibility of the web pages. The second chapter presents methodics of the accessible website, Czech and foreign rules and lawful orders. The foreign (WCAG, Section 508) and the Czech (Blind Friendly Web and Pravidla pro tvorbu přístupného webu) representatives of the rules are introduced in the next part of this chapter. The idea of the accessible web application – electronic shop - is presented in the third chapter. There are subscribed the conception of electronic shop, advantages and disadvantages and main functions. In the next part of this chapter there are mentioned the primary rules of the writing the source code of the web pages which are used during the creating of the accessible web application of the electronic shop. Closely there are introduced scripting language PHP, database system MySQL and Cascading Styles Sheets (CSS). The part of the master’s thesis is a mentioned accessible web application of the electronic shop. The presentation is placed on http://www.xandy.cz/tmp/ and presents the accessible web system with the respect to accessibility. Creation and description of this web application is mentioned in the last fourth chapter.
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Research of Localization Algorithms in Wireless Sensor Networks
Holešinský, Pavel ; Morávek, Patrik (referee) ; Šimek, Milan (advisor)
This diploma thesis is focused on research of localization algorithms. Each developed localization algorithms are generally application specific. Because of application requirements diversity, many variants of localization algorithms exist. In case of finding appropriate localization algorithm for concrete application usability, existence of real condition simulation environment is useful. Development of this simulation environment was made simultaneously with both localization algorithms. At first, survey of available localization technic was performed and their summary was listed. Further work was aimed on research of two localization algorithms. Both of them use triangulation mechanism to determine unknown node position. This mechanism is based on measurement of distance to three reference points with known position. It would seem that both algorithms are similar, but simulation shows their difference and presents their suitability for diverse conditions.
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Multicast Communication in Wireless Sensor Networks
Valouch, Jaromír ; Morávek, Patrik (referee) ; Šimek, Milan (advisor)
This master’s thesis describes energy consumption in wireless sensor networks. It is focused on energy consumption during communication and it provides rules to save energy during this operation. There are terms like wireless sensor networks, multicast, ad-hoc networks, routing protocols, multicast routing protocols, IGMP protocol, AODV routing protocol, MAODV routing protocol explained in this thesis. The main difference between multicast and unicast communication is analyzed as well. In the end of this thesis there are results of simulation small wireless sensor network from network simulator2. The simulations were focused on energy consumption during communication. The length of packet was changed during communication between two nodes in this simulation. In wireless sensors network nodes play a dual role as both data sender and data router therefore there were made research into energy consumption senders, routers, receivers in wireless sensor network during communication.
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GPS based Localization using the Java ME application
Figurny, Radek ; Morávek, Patrik (referee) ; Růčka, Lukáš (advisor)
The task of the Master's thesis has been to develop the MIDlet, which is able to receive data from an external GPS module via Bluetooth. Data are received in the NMEA 0183 format and are processed to extract longitude, latitude, elevation, velocity, number of visible satellites and measurement accuracy of longitude, latitude and elevation. Users have a possibility to save their actual location with a short description to the cell phone’s memory. The MIDlet is also able to save a user defined way-point and navigate to this way-point. The MIDlet itself was developed in the Netbeans IDE with a software development kit (SDK) made by Nokia company. This kit is designed for the Symbian OS s60 3rd edition FP1, which contains a s60 emulator and a s60 MIDlet for a direct compilation in the cell phone. The MIDlet is made of three main parts. The first part shows a longitude, latitude, elevation, velocity, longitude and latitude measurement accuracy, date and time. The second one shows a direction of north, latitude and longitude. The last one shows a direction to the selected way-point and a distance to this location. In theoretic part of the thesis there are described the GPS navigation system, Bluetooth system, geodetic system WGS 84 and programing language Java and its part Java ME.
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The V-mux test system
Morávek, Patrik ; Herman, Ivo (referee) ; Novotný, Vít (advisor)
An optical network technology is the network technology that meets given requirements for a fast and reliable long-distance information transmission. Optical fibres can offer undoubted features where other communication technologies are near their limits or stand in front of insurmountable problems. The intensive research of last years is focused on optical transmission features utilization in the optimal way. Especially an optical signal processing in active network devices without a need for electrical conversation is a topic of high interest. V-Mux is an optical network device that accomplishes above mentioned requirements for modern optical network devices. It is a device that multiplexes and drops an optical signal in its native light form into or from optical fibre. Basic micro electro-mechanical components, which the V-Mux is built from, are high end precise devices. The whole complex V-Mux has to meet strict rules and specifications as the components itself. That is why a control system has to be included in the production process to keep quality and right functionality. This diploma thesis is focused on a development of the testing system that will help in the automated control procedure in the V-Mux production. A brief introduction to optical network technologies and a description of the GPIB bus form a first part of the thesis. The next part focuses on the V-Mux itself and the proposal of the test station with its component description. The last part deals with a developing of the software for the V-Mux testboard and a user application that will be used for the test system initialization.
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