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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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Localization in Wireless PAN
Polok, Zbyszek ; Šimek, Milan (referee) ; Hynčica, Ondřej (advisor)
This bachelor thesis deals with the problem of localization in wireless sensor network. First, ZigBit 900 Modules equipped with chip for wireless communication (AT86RF212) are used to measure the signal strength in the area of Brno University of Technology. The recorded values are then processed using trilateration localization techniques and Euclidean propagation methods. After detecting negative effects on the calculation of the position sought, a filtering method for the calculated values is proposed. In addition, an algorithm determining a sufficient number of reference values for loss rate is also designed to locate all the positions sought. By virtue of these algorithms the trilateration localization method is optimized.
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Localization Services for Web Applications
Kočan, Tomáš ; Grégr, Matěj (referee) ; Veselý, Vladimír (advisor)
The aim of this master thesis was to develop an application that would visualize the position of sensors placed indoors. Since the sensors are located in the buildings, geographical maps are not used as basis, but the user has the option to upload his own background in the form of floor plans of rooms, floors, buildings,... For this purpose, application has tools for uploading, managing and editing such plans. The paper also describes how to use the application to monitor the current and past positions of these sensors. Support for these features is provided by several server components consisting of a REST server, WebSocket server, Upload servers and other services. Their design, description, and implementation is also part of this document. In addition, the work describes RTLS (Real-time locating system) technology, architecture, client application and data security.
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Wireless Sensor Network with Arduino Components
Výborný, Filip ; Král, Jiří (referee) ; Samek, Jan (advisor)
The goal of this bachelor's thesis is to introduce the possibility of using Arduino hardware platform as an aid to the creation of wireless sensor networks, focusing especially on the routing of measured data issues from sensor nodes to the base station. My thesis deals with the design and implementation of wireless sensor networks from suitable Arduino components, based on the XBee wireless communication modules which are introduced in the second chapter. The third chapter discusses the selection of a suitable communication protocol, the relatively unknown protocol DigiMesh. The final chapter covers the design of the actual wireless network which has been tested.
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Reduction of position estimate error in incremental localization techniques
Pekárek, Jan ; Morávek, Patrik (referee) ; Šimek, Milan (advisor)
The diploma thesis describes localization of communications nodes in the Wireless Sensor Networks. This thesis contains basic algorithms for localization sensor's nodes as are Map-Growing and ABC (Assumption Based Coordinates). Then is chosen acceptable algorithm for simulation on random sensor networks. For research these problems is used software MATLAB. For a given the university's environment are researched appropriate algorithms with possible optimalization algorithms. The result of diploma thesis is a localization algorithm with initial multilateration system and this system is located in the center sensor's network. As algorithm IMap4-Growing (Improved Map4-Growing) with optimization, which uses optimization distance between sensors and radio range. In the diploma thesis is simulated optimalization algorithm Mass-Spring.
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Localization in Wireless Energy-Constrained Networks
Morávek, Patrik ; Vozňák, Miroslav (referee) ; Křepelka, Václav (referee) ; Komosný, Dan (advisor)
Tato disertační práce se věnuje lokalizaci v bezdrátových sítích se zaměřením na odhad vzdálenosti. Lokalizace je v bezdrátových sítích s mobilními ale i statickými uzly důležitým procesem, neboť znalost pozice uzlů může být během provozu sítě dále s výhodou využita. V práci je prezentována nová metoda odhadu vzdálenosti na základě měření síly přijatého signálu. Navržená metoda je postavena tak, aby s co nejnižšími energetickými náklady dosáhla požadovaného stupně přesnosti i ve značně odlišných rádiových podmínkách. Před návrhem vlastní metody byla provedena experimentální analýza spotřeby anergie a šíření signálu s jeho využitím pro lokalizační účely. Na základě provedené analýzy byla navržena nová metoda (Adaptabilní energeticky nenáročná metoda odhadu vzdálenosti), která byla následně ověřena v simulátoru a experimentální síti za reálných podmínek.
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WSN Visualisation
Kočan, Tomáš ; Samek, Jan (referee) ; Zbořil, František (advisor)
The aim of this work is to create a web application that would serve to visualize, ie. graphical representation of data from sensors on maps. In addition, provide tools to track historical data from the sensors with the use of diagrams. The basis of application are languages JavaScript and HTML together with the use of other libraries such as jQwidgets, jQuery, amCharts and application interface of Google Maps. This paper describes an introduction to wireless sensor networks, description of application architecture, design and implementation of application, as well as the testing and further development.
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Wireless Sensor Network with Static Topology for Building Monitoring
Koudelka, Jan ; Žák, Jakub (referee) ; Samek, Jan (advisor)
This bachelor's thesis is focused on realization of wireless sensor network (WSN) for buildings monitoring and real-time obtaining of data. Just for work on this project the micaZ sensor nodes have been chosen. The main task is to create WSN with a static topology and some communications mechanism. That network consists of several nodes, and there is a special one called base station. It also has a special function, different from the others. The function is that the base station is collecting data from all of the nodes and sending them to a computer through an USB port. In addition to designing the network topology the other tasks are to implement a comunication protocol and to create computer application and application for sensor nodes. Data will be visualised in text and graphical form. Moreover there are some information about the simulation tool called TOSSIM which allows testing applications without having a physical access to micaZ sensor nodes.
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MAC Protocol for Wireless Sensor Networks
Michálek, Tomáš ; Krajsa, Ondřej (referee) ; Červenka, Vladimír (advisor)
The work focuses on introduction to the topic of wireless sensor networks and brings readers the various aspects of problem solving in these networks. Work is closely focused on the energy performance when communicating between devices on a network and discusses the causes of excessive energy consumption. It also addresses the mechanisms for saving energy and is also engaged today protocols that its contribution to proposing solutions to problems. The author had also proposes an adapted protocol, based on lessons learned from previous theoretical sources.
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Localization protocol for WSN with support of node mobility
Votava, Martin ; Šimek, Milan (referee) ; Holešinský, Pavel (advisor)
Work is focused on wireless sensor networks.The main theme is the mobility and localization in these networks. This work describes different methods and capabilities of mobile and localization schemes. This work describes a new localization protocol for wireless sensor networks. Finally, there is included a new protocol in the simulation at Network Simulator 2 and evaluate the results obtained.
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