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ZigBee implementation for Automotive Industry
Zatloukal, Martin ; Maršálek, Roman (referee) ; Prokopec, Jan (advisor)
This bachelor’s thesis describes possibilities of usage of ZigBee communication protocol in automotive industry, transport and logistics. Thesis also deals with ways of practical implementation of ZigBee protocol including typical cases solutions, designing and realization of necessary electrotechnical devices and modules followed by compilation of control software and experimental measurements of these devices in real traffic flow. In the first part of thesis, there are some basic features and parameters of ZigBee reminded, followed by ways of ZigBee communicator usage description and adumbrating how to perform integration with existing practical systems. The second part is about analysis of ZigBee data system construction, communication system scheme design and pre-projection of block schemes of its particular cells. The third part concretizes requested functions and features of these cells and describes ways of its hardware realization. The fourth section describes controlling software design, connection and controll of functions using PC and additional programs, using of X-CTU software offered by MaxStream Company to set up XBee parameters and using of AVR Studio 4 offered by Atmel Company to set up ATmega16 processor. The last part is taken by completation of hardware and software, tests with a few of XBee chips and network nodes in laboratory conditions and examples from the real traffic range measurement.
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Quality of services and experience qualify for next generation networks
Vaněk, Jiří ; Horváth, Tomáš (referee) ; Grenar, David (advisor)
The thesis sums up the traffic parameters for the evaluation of next-generation access networks. There are mentioned parameters for service quality management and parameters for measuring the quality of experience. The EU regulation on High Speed Internet in the Czech Republic is analyzed. The practical part compares the results between the implementation of the quality management of services and without implementation. Also there is comparing theoretical and practical transmission rates of physical ports. Part of the thesis is a questionnaire focused on the quality of experience of the video sequence.
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Model of computer network in MATLAB/SIMULINK environment
Zedníček, Petr ; Zeman, Václav (referee) ; Kolka, Zdeněk (advisor)
The bachelor thesis deals with simulation of TCP protocol behaviour in Wireless optical environment. The thesis examines the various parameters of the protocol and evaluates their response to the transmission speed. The key objectives of the thesis are the introduction to the problems of communication, specially the description of the transport layer architecture, TCP / IP and congestion management mechanism NewReno. A large part of the thesis is devoted to modelling communication points and a model of optical wireless connections. The results will be applicable to create a new communication protocol for Wireless optical environment.
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DMA Controller and Network Interface Card Driver for COMBO2 Platform
Kaštovský, Petr ; Kořenek, Jan (referee) ; Martínek, Tomáš (advisor)
There is a family of COMBO cards used for netork monitoring acceleration being developed on the Liberouter project, which is the CESNET's research activity. These cards are equipped with Xilinx's programmable field array. To enable usage of classic tools for network monitoring and management, not only application specific tools, it is necessary to implement network interface card on the platform, that realizes packet reception and transmission through the standard Linux kernel interface. This thesis describes the design and implementation of network interface card's key components. Those are DMA controller and Linux device driver.
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Network element project by means of neural network
Pokorný, Petr ; Krček, Petr (referee) ; Šťastný, Jiří (advisor)
The diploma thesis deal with a priority network switch whose model was made in programming environment Matlab - Simulink. Problem of optimal switching is solved by Hopfield’s artificial neural network. Produce of the diploma thesis is a model of packet switch and time-severity comparison of optimalization problem solved with or without artificial neural network. The thesis was developed in research project MSM 0021630529 Intelligent Systems in Automation.
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Cluster analysis of data traffic
Nagyová, Simona ; Martinásek, Zdeněk (referee) ; Blažek, Petr (advisor)
This thesis is meant to present the methods of cluster analysis, their use for detecting network traffic anomalies. It deals with various types of cyber attacks particularly DoS (DDoS) attacks. It contains a list of well-known DoS attacks. Also includes a program in Python, using the k-means method for detection of anomalous traffic.
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Design and realization of wireless interface ODBII-XBee
Zatloukal, Martin ; Frýza, Tomáš (referee) ; Prokopec, Jan (advisor)
This master’s thesis describes possibilities of usage of ZigBee communication protocol and integrated circuit ELM 327 in problem of realization universal diagnostic device, running by OBDII communication standards, which can be used to monitor function of all car´s electronic systems. Thesis also deals with design and realization of necessary electro technical devices and modules followed by compilation of control software and experimental measurements of these devices in real traffic flow. In the first part of project, there are reminded some basic features and parameters of OBDII, followed by description of ways how to use OBDII and adumbrating how to realize universal diagnostic system. The analysis of ZigBee system focused on XBee circuits follows. Construction, ways of data transfer and possibilities of controlling are described. Integrated circuits produced by ELM Electronics Company are introduced and possibilities of usage ELM 327 are described as requested by main task. Second part talks about designing of electronic circuits of this system, assembling schematic diagram and designing sources for production of PCB. Physical realization of these circuits and its first start is also included. Thesis finishes by dealing with practical experiences and measurements using real vehicles. This part talks also about means to improve system by several software solutions to reach more effective functioning of created device.
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Security protocols in practice
Milfajt, Jiří ; Koutný, Martin (referee) ; Pelka, Tomáš (advisor)
This bachelor's thesis maps the most used AAA protocols in these days. These protocols include RADIUS, TACACS+, DIAMETER and KERBEROS. The first part considers its main signs. Then there is describes basic communication between user and server. The thesis also compares each protocol by its advantages, disadvantages and its possible security weaknesses. The second part is dedicated to configuration of RADIUS and KERBEROS protocol.
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Network server performance when communicating with a great number of clients
Mašín, Jan ; Pelka, Tomáš (referee) ; Komosný, Dan (advisor)
The aim is to create a simulation system between two computers of the server-client type to generace the process to server while usany UDP protocol: to set different parameters of the generated process (size of paquet, interval of sending) and evaluace the server-sources consumption (memory), to work out the outcomes in a well-organized manner. There have been tested two servers (each of different output) and operational systéme Windows XP, Windows Server 2003, Linux Mandriva 8.0 and Linux Fedora 7, each of these had been installed on the servers with different outputs. The generated process is carried out with usaje of the paquet generator made in the programming language C++.Two different programmes needed have been created, one of them for klient(paquet generation in OS Windows), its aim is to generate the paquets, the sekond on efor server (functional version working in OS Linux had had to be made) receiving the generated paquets. Evaulation of the source-consumption was carried out by two monitoring programs, one of them suited for OS Windows, the other for OS Linux. Both programs safe the information about procesor-work and operational memory into a text dokument which is very simple and fast way for searching the information. The measured values show charts and graphs that express the efficiency of separate OSs or, in case of need, servers of different outputs are able to handle the generated paquets and how do the alterations of the paquet generator affect the source efficiency( paquet size and paquet-sending interval).
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