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Laboratory exercise - IQRF module for measuring mesh networks
Goryl, Juraj ; Paluřík, Pavel (referee) ; Jablončík, Lukáš (advisor)
This bachelor’s thesis deals with creating a laboratory task integrated into the subject of "Communication Systems for IoT." The first part of the thesis consists of familiarizing oneself with the issues of the IQRF network, its topology, and the network’s capabilities. The thesis compares IQRF technology with other IoT technologies commonly used in this field. The practical part of the thesis comprises the design of a module for the IQRF transmitter TR-72DA in the form of a mini PCIe card. Another part of the thesis deals with establishing communication with the BPC-IoT board using the SPI bus, with temperature measurement used as an example. The final part of the thesis is the assignment for the actual laboratory task. The appendices also include schematics and source code of programs for both the BPC-IoT board and the IQRF transmitter.
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Design of laboratory activities for Telecommunication network services course
Dúbravka, Adrián ; Tomašov, Adrián (referee) ; Horváth, Tomáš (advisor)
This master's thesis focuses on designing three laboratory tasks for the subject of Telecommunication Network Services. The aim of this work is to develop education in the field of telecommunication networks through practice-oriented tasks. The work begins with a theoretical introduction that addresses current requirements for metallic and optical networks. It thoroughly examines the various services and approaches used in these networks. The theoretical part specifically focuses on the IXIA network analyzer, which is presented as a key tool for analysis and testing in laboratory conditions, including its advantages and limitations. In the practical part of the work, the design of three laboratory tasks integrated into the course is presented. These tasks are designed to correspond to realistic network scenarios and provide students with practical skills with devices and software. The first task involves working with the IXIA network generator, the second task focuses on simulation and testing using the GNS3 software and the third task thoroughly analyzes the DOCSIS system, its configuration, and functionality.
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Measurement design in modern packet, transport, and access technologies
Galovič, Dominik ; Michálek, Jakub (referee) ; Škorpil, Vladislav (advisor)
The diploma thesis focuses on the capabilities of the VeEx VePAL Tx300s analyzer and network analysis. In the theoretical part, the thesis focuses on the most common tests used for analyzing network parameters of networks and its devices. Their principles, advantages, and disadvantages are described. The choice of the tests is deliberately selected to match the capabilities of the analyzer itself. Its basic functions are described in this diploma thesis. After understanding the functioning of individual tests and the analyzer itself, two laboratory tasks were created to familiarize potential students, for whom these tasks were designed, with the basic operation of the analyzer and to acquaint them with basic as well as advanced testing of network parameters, whether of active network elements or the laboratory network itself. An addition is the use of the VeEx VePAL tx300 analyzer, which was purchased previously, and the change of an already made laboratory task.
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Optimalization and analysis of communication services latency dependencies
Zikmund, Lukáš ; Škorpil, Vladislav (referee) ; Endrle, Pavel (advisor)
This master’s thesis is focused on ensuring of Quality of Service (QoS) in wireless network for standards IEEE 802.11 a/b/g/n. First part of this thesis is focused on the theory of this issue. It covers methods of data transfer in computer networks and individual transfer parameters especially on parameters needed to ensure quality of service. It also describes standards for wireless data transmission and protocols for real time data transmission. The second part is devoted to OPNET modeler and to simulations created on this program. Simulations are focused on real-time data transfer and compare the standards in terms of delay and jitter.
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Methods for the measurement of bit rates in data networks
Franc, Jan ; Martinásek, Zdeněk (referee) ; Zeman, Václav (advisor)
The target of this master's thesis were the known methods for testing the quality of transfer parameters of data networks. I have studied the RFC 2544 document to analyze these tests. From that information and by studying other existing web-based applications I was able to design a concept of my own application that will allow to measure basic quality parameters of transfers made through the Internet (the parameters: downstream, upstream, latency, variance of these and a traced route). My application doesn't require any modifications on the user's system. It's built on the server-based programming language PHP and uses the relational database engine MySQL to store measurement and user data. On the client side, it's assisted by the JavaScript scripting language. Both registered users and visitors are allowed to perform the listed measurements. Registered users are able to browse the history of their own benchmark results and also to send messages to others. There is an administrative account to oversee the operations. Another part of my thesis work is an application for Windows that performs the same measurements but does not use JavaScript.
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Methods for measurement of data network performance and quality parameters
Sukup, Luboš ; Zeman, Václav (referee) ; Novotný, Vít (advisor)
Master thesis involves the development of quality measurement issues and performance parameters in data networks. It describes the main technologies as they affect the quality and performance parameters and the effect of these parameters for voice, video and data services. Next are listed some methods for measuring parameters of the data network.In the practical part is selected one method of measuring network parameters and properties of this method are demonstrated by illustrative examples.
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Host distance measurement using ICMP protocol in IP networks
Fojtová, Lucie ; Komosný, Dan (referee) ; Burget, Radim (advisor)
Current internet more and more often faces the problem of the right definition of distance between the single hosts. The knowledge of this quantity influences the areas of the optimal lay-out of overlay multicast networks, the right selection of peer-to-peer network participant, or the simple decision of the end user: which one of the nearest mirrors to use for downloading datas. The nearest one doesn't have to mean the nearest in geographical point of view - the distance on Internet is usually expressed by quantities as latency or bandwidth. All these examples have got the saving of bandwidth in common and therefore economical saving. The methods of host position prediction in networks work on the basis of measuring latency parameter. The tools for measuring of this parameter will be set up in this thesis and at the same time it will be shown how geographical distance and latency correspond with each other.
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Performing a Relay Attack on Mifare Smart Cards
Činčala, Martin ; Henzl, Martin (referee) ; Malčík, Dominik (advisor)
This thesis deals with performing a relay attack on MIFARE smartcards while using off-the-shelf readers only. These readers are not designed for such attacks therefore implementation of the attack that would succeed against every smartcard was not possible. Since various attacks on smartcards have already been implemented, I have focused on the latest and still insufficiently explored card MIFARE Ultralight C. Relay attack has been implemented with simplified emulation of 4-bytes long UID and successfully tested on MIFARE Ultralight C. With the use of other readers it should be possible to perform attack also on other cards like MIFARE Plus, Desfire and SmartMX. For the purpose of cloning MIFARE Classic open-source tools are introduced.
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Wireless communication link analyzer
Dostálek, Jakub ; Burian, František (referee) ; Jílek, Tomáš (advisor)
The aim of this bachelor thesis is to design and implement a wireless communication analyzer in mobile robotics, using IPv4 protocol and Ethernet interface and to create correctly selected and expressed characteristics from the measured data, according to which the wireless communication channel can be further optimized for the best data transmission. To meet these requirements, a brief search of existing solutions was performed, their applicability was discussed and important parameters of the wireless transmission channel were defined, which will form the given characteristics. Furthermore, the actual design and implementation of a wireless communication link analyzer for previously specified required parameters, verification of its functionality on the transmission link with known parameters and automation of measurement and data evaluation was performed.
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Geolocation in Internet using latency measurements
Harth, Petr ; Balej, Jiří (referee) ; Komosný, Dan (advisor)
This diploma thesis is concerned with practical realization of CBG (Constraint-based Geolocation) algorithm, which is one of the IP (Internet Protocol) geolocation technique. IP geolocation determines the localization of a computer workstation location on the basis of on its IP address. The factors causing delays in data transfer are discussed first, followed by discussion of the issue of measuring these delays. The detailed explanation of IP geolocation follows where its contexts as well as the active geolocation techniques (techniques based on delay measurement mentioned above) are described. After that a brief description of PlanetLab experimental network, which was used for geolocation techniques measuring, is presented followed by a section explaining the creation of reference points and targets, which are another necessary prerequisite for practical realization of the method. Then the practical realization is explained in the form of CBGfinder program and its verification on the basis of artificial input data along with an actual example of IP geolocation of a point in the Internet are provided. Last but not least the measurement results of CBG algorithm are introduced, based on the analysis of Bestline parameters of one of the PlanetLab nodes measured in the period of one month, followed by a discussion of the inaccuracy of geological position and the computation speed. The cumulative distribution function as well as the kernel density estimation are also described. Final part of the thesis consists of discussion on measured results compared to results of other geological techniques results implemented by colleagues of the author of this diploma thesis. The results are compared on the basis of average inaccuracy of geological position estimations and its median, computation time, cumulative distribution function and kernel density estimation are also taken into regard.
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