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Remote-controlled switching of information systems - part II
Prečan, David ; Kapoun, Vladimír (referee) ; Herman, Ivo (advisor)
This bachelor´s thesis deals with remote communication over Ethernet interface. First, a brief survey of the existing solutions is presented. Then a remote temperature measurement using data transmission over Ethernet network is proposed. The proposed solution is described in detail including hardware and software design of an equipment for data transmission and evaluation that is based on ATmega 162/30 processor. This equipment communicates with a PC where the measured temperature is displayed. A functional sample of this equipment, which was used to verify the design, is described.
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Secured data transfer between client and server using hessian protocol
Hořejš, Jan ; Uher, Václav (referee) ; Burget, Radim (advisor)
The objective of this work was the choice and creating of a secure communication protocols between server and a client in order to transmit sensitive medical data through an unsecured network. The first part is focused on a theoretical description and the properties of both client and server applications, metaprotocols, their purpose and thein appropriate use. The second part describes creation of secure communication and creation of demonstration application for secure data transmission. It is demonstrated by setting the server, creation of client applications and compilation of the certificate, including its installation.
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Software for assuming control over the computer
Kostelník, Jan ; Kouřil, Jiří (referee) ; Polívka, Michal (advisor)
The introduction of this Master’s thesis describes a historical and technological evolution of the terminal application, including its advantages and disadvantages. In the following part, a general description of the services and their understanding are mentioned. The benefits and general advantages of the terminal services are described. For the each type of the terminal service, all the functions, options, exact advantages and disadvantages are described. Consequently, the study of the suitability of the compression is presented. On the demo application, the impact of an excessive (voluntary) loss of information is demonstrated. In the next part, the thesis deals with the most frequently used remote-control applications. The tests and comparisons are made as well. The fifth chapter is the fundamental part of this work. The design approach of the workbench is presented there. Consequently, the design approach and system implementation intended for the supervision and control is described. This system makes the user possible to observe other user’s activities and also to control their workstations. The supervising user can also access their drives and other memory devices, which are located in the monitored workstation. The communication is compressed and encrypted. The symmetric and asymmetric encryption algorithms are used there. In the following part, there are two supplementary applications mentioned – application for the key generating and network file manager. In the end of my work, the results of the performance test and also the design of other improvements are presented.
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Error protection of data transmission using BCH Codes
Kašpar, Jaroslav ; Křivánek, Vítězslav (referee) ; Němec, Karel (advisor)
The thesis Data transmission error-protection with BCH codes deals with a large class of random-error correcting cyclic codes which are able to protect binary data and can be used for example in data storages, high speed modems. Bose, Chaudhuri and Hocquenghem (BCH) codes operate over algebraic structures called Galois fields. The BCH encoding is the same as cyclic encoding and can be done with linear feedback shift register but decoding is more complex and can be done with different algorithms - in this thesis there are two algorithms for decoding Peterson and Berlekam-Massey mentioned. The aim of this thesis is to find BCH code which is able to correct t = 6 independent errors in up to data sequence n = 150 bits, then peruse possible realizations of the codecs and set criteria for the best realization, then design and test this realization. This thesis is split into three main parts. In the first part there are encoding and decoding methods of the BCH code generally described. The second part deals with selecting of the right code and realization. There was chosen BCH (63,30) code and realization with FPGA chip. In the last part is described design of BCH encoder and decoder and compilation in the Altera design software.
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Energy Aware Data Processing on Wireless Sensor Nodes
Červenka, Vladimír ; Zdrálek, Jaroslav (referee) ; Vaněk, Tomáš (referee) ; Komosný, Dan (advisor)
This thesis focuses on energy efficiency of particular aspects of data processing on wireless sensor nodes and deals with methods aiming to decrease energy consumption of wireless sensor network (WSN) applications requiring high processing power. The work presents comprehensive analysis of mesh protocols and available hardware platforms in terms of energy efficiency. A new energy efficient sensor node with high processing capability is presented and utilized to evaluate the proposed system for autonomous data transmission in WSN. Finally, an implementation of real-time operation system supporting mesh communication and very strict energy requirements through energy profiles is also presented. A valuable finding is that further increase of energy efficiency is only possible through a holistic approach in software and hardware architecture design, so that hardware and software/ firmware are tightly coupled. The output of this research might be applied in industry or academy field without necessity of any change or prior knowledge of WSN. The autonomous system of data transmission opens new research possibilities to decrease energy requirements of WNS.
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Data buses in the automotive industry
Plíšek, Marek ; Míša, Jiří (referee) ; Zháňal, Lubor (advisor)
The topic of the bachelor thesis is data buses in cars. The aim of the work is to describe data buses and compare their key properties and functional parameters. Sources for bus comparison are drawn from domestic and foreign sources. The work brings a complete comparison of all commonly used data buses: CAN, LIN, FlexRay, MOST, Ethernet. The output of the analysis is a clear table of properties and parameters of buses with a description of their advantages and disadvantages. The work is supplemented by a reflection on the future development of communication systems in cars.
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Wireless data collection form engine control units
Procházka, Miroslav ; Kejík, Petr (referee) ; Prokopec, Jan (advisor)
This thesis deals with implementation of a wireless interface for a module providing communication between computer and electronic control unit of an automobile. The 802.11 standard, wireless network structures and MAC sublayer were described. The thesis suggests selection of the most suitable WLAN module, testing of module's features used and the WLAN module implementation. Modifications for the next device version were developed and programs for device operation were implemented.
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Multimedia transmissions in IP networks
Kejík, Tomáš ; Slavíček, Karel (referee) ; Grenar, David (advisor)
The topic of the master’s thesis is "Multimedia transmissions in IP networks". The goal of the thesis was to perform a theoretical analysis of multimedia transmissions in IP networks and to create a basic test set for generating and measuring network traffic. The theoretical part is devoted to the basic types of IP video transmission and the methods of transmitting in IP networks. Furthermore, protocols for controlling or distributing multimedia content are described. The practical part deals with creating the script written in the Bash language. The test script contains a set of functions that are created by different network tools. A Bash installation script has been created to install all the necessary tools automatically and conveniently. In order to generate multimedia and data traffic, the vlc and nc commands were used. The multimedia data editing was handled by the ffmpeg tool and to graphically display the measured data the smag and youplot tools were used. Additionally, the efficiency of the selected compression formats depending on the playback speed of the Raspberry Pi 4B single-board computer was also compared.
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Laboratory for teaching and testing network elements
Poláček, Marcel ; Šimák, Boris (advisor) ; Holý, Radek (referee)
Název: Laboratoř pro výuku a testování síťových prvků Autor: Marcel Poláček Katedra: Katedra informačních technologií a technické výchovy Vedoucí práce: prof. Ing. Boris Šimák, CSc. Abstrakt: Práce se zaměřuje na problematiku týkající se telekomunikačních a počítačových sítí. Vypisuje základní témata tohoto oboru. Cílem práce je najít řešení, vytvoření laboratoře pro testování síťových prvků, které lze libovolně nastavovat, přičemž se zachová maximální autenticita pro odbornou výuku. Je také nutné najít řešení ekonomicky výhodné, aby bylo možné tuto práci aplikovat v co největší možné míře v institucích vyučující danou problematiku. Součástí práce je i vymyšlení základních laboratorních úloh s různou obtížností. Klíčová slova: počítačové sítě, operační systémy, telekomunikační technologie, přenos dat, laboratoř pro testovaní sítí, virtualizace a emulace síťových zařízení
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Data buses in the automotive industry
Plíšek, Marek ; Míša, Jiří (referee) ; Zháňal, Lubor (advisor)
The topic of the bachelor thesis is data buses in cars. The aim of the work is to describe data buses and compare their key properties and functional parameters. Sources for bus comparison are drawn from domestic and foreign sources. The work brings a complete comparison of all commonly used data buses: CAN, LIN, FlexRay, MOST, Ethernet. The output of the analysis is a clear table of properties and parameters of buses with a description of their advantages and disadvantages. The work is supplemented by a reflection on the future development of communication systems in cars.
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