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Optical software defined networks
Janoušek, Adam ; Horváth, Tomáš (referee) ; Vojtěch, Josef (advisor)
The bacherol thesis „Optical SDN“ deals with the analysis of software-defined technology networks on the optical switch. Specifically, it focuses on remote manual switching and automatic switching based on surroundings. The aim of the thesis is description of technology, understanding the principle of software-defined networks, including the implementation of demostrative manual remote switching and automatic switching.
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General Security of the Internet of Things
Páleník, Luděk ; Horváth, Tomáš (referee) ; Oujezský, Václav (advisor)
The thesis "General Security of the Internet of Things" deals with the analysis of networks with low power consumption in the theoretical part -- especially LoRaWAN networks. Further, the thesis deals with the general security of the Internet of things and the security risks of LoRaWAN networks. The practical part is focused on building the LoRaWAN gateway, which is realized with the Raspberry Pi platform with the iC880A-SPI extension module. The gateway is put into operation with full settings, assignment to the network server. Sensors configuration, creation an application, and assign it to the application server. In the practical part, a replay attack on LoRaWAN technology, which demonstrates the vulnerability of this technology, is realized.
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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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GPON Frame Detection System
Holík, Martin ; Münster, Petr (referee) ; Horváth, Tomáš (advisor)
This diploma thesis deals with GPON frame detection system. Partial problems of designing databases, optical networks and management of database system are described in theoretical parts. Practical parts this thesis are focused on design of system for detecting GPON frames and script for analysing of traffic.
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Security Risks in Passive Optical Networks
Šimoník, Jan ; Jeřábek, Jan (referee) ; Horváth, Tomáš (advisor)
This diploma thesis deals with the historical development of passive optical networks, according to the standards that was defined by International Telecommunication Union (APON, BPON, GPON, XG-PON and NG-PON). Further, the thesis describes the security of passive optical networks, but also a security threats which the deployment and use of passive optical technology carry. In the introductory chapters of this thesis the passive optical networks are described. The following is a description of the standards of passive optical networks in terms of their historical development. The next part is dedicated to the security of passive optical networks and possible security threats. In conclusion a description of the practical part of this thesis is given -- rack assembly, which will serve for future testing. The basic configuration of the optical line terminations that are fitted in the rack is also described. The last part of this diploma thesis is dedicated to the testing of selected security risks, which was described in the theoretical part of this thesis.
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Influence of Dynamic Bandwidth Allocation over Optical Network Unit
Sikora, Pavel ; Oujezský, Václav (referee) ; Horváth, Tomáš (advisor)
This thesis deals with DBA algorithms used in XG-PON networks. It describes reference appearance of the DBA algorithm, as well as, three specific DBA algorithms discussed in professional articles. Particularly speaking about GIANT, HYRA and modified Max-Min Fair DBA. The thesis provides description of frames utilized by DBA algorithms in XG-PON networks, specifically XGEM frame and XGTC frames. The thesis also presents a simulation tester of DBA algorithms tested on a virtual XG-PON network. Finally, it contains the results of testing these DBA algorithms with a description.
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Transmission of accurate time and stable frequency through the optical network
Girt, Lukáš ; Horváth, Tomáš (referee) ; Vojtěch, Josef (advisor)
Diploma thesis focuses on the theoretical analysis of precise time and stable frequency transfer. It describes what time and frequency is, their properites and options of their generation. Next part deals with different possibilities of time and frequency transfer especially using fiber optics. In the practical part equipment for analysing effects of temperature changes on precise time transfer is puted into operation. Arduino platform is used for monitoring temperature changes on fiber. For testing of frequency stability in variable temperature conditions of environmental chamber device is created using highly coherent laser.
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Gigabit Passive Optical Network Analysis
Mižička, Vladislav ; Krkoš, Radko (referee) ; Horváth, Tomáš (advisor)
Cílem této práce je konfigurace vysokorychlostního paketového analyzátoru Endace, konfigurace zařízení gigabitové pasivní optické sítě (GPON) a následná analýza zachycených dat. Práce by měla být soustředěna zejména na možnost detekce provozních dat jednotky GPON. V teoretické části je stručně popsaný paketový analyzátor a jeho možnosti, dále také jednotka GPON a možnosti zapojení s analyzátorem k detekci provozu. V praktické části, zařízení jsou nakonfigurovaná a zachycená data analyzovaná.. Aplikace vyvinutá s pomocí jazyka Python podporuje příjem a zpracování dat. Výstup analýzy by měl být v rámci možností co nejpodrobnější s popisem významu jednotlivých položek.
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Seismic activity measurement using fiber optic sensors
Vaněk, Stanislav ; Horváth, Tomáš (referee) ; Vojtěch, Josef (advisor)
The aim of master's thesis is to get familiarized with the problems of measurement and analysis of seismic waves. Theoretical part deals with the description of seismic waves, especially their types, sources and properties. Attention was afterwards focused on the measurement systems of these waves, emphasis was placed on their principles and advantages. The practical part discusses methods of noise reduction and highlighting of significant events in measured data. At the end, individual methods are implemented into user-friendly graphical interface.
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Optical switching and traffic grooming
Foldyna, Petr ; Havliš, Ondřej (referee) ; Horváth, Tomáš (advisor)
This bachelor thesis is about problematics of optimalization wavelenght usage in optical networks. First part theoreticaly explains optical networks and problems when using them, switching in optical networks and traffic grooming. In second part mathematical equations of given problems are realized and also simulations using GLPK are realized. From results of simulation resolutions are given and usage of methods in real networks is explained.
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