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Measurement of electric power quality
Šenk, Marek ; Mišurec, Jiří (referee) ; Mlýnek, Petr (advisor)
Bachelor thesis introduction explains the concept of electric power quality and describes the different characteristics of voltage, which determine the electric power quality. Further bachelor thesis is engaged in finding the optimal data communications for the energy data for telecommunications networks, GSM networks and high-voltage networks PLC technology with regard to safety and reliability of data transmission. Subsequently are analyzes the data using Wireshark. Analyzed data was measured meter of power quality PQ monitor MEg 33. According to the types of analyzed data were evaluated possible types of security using CrypTool 2. At the end of this work is analyzed measuring the basic characteristics of power quality and practical measurement is made with quality recorder Fluke VR1710.
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Computer models of telecommunication lines
Přívozník, Tomáš ; Mlýnek, Petr (referee) ; Mišurec, Jiří (advisor)
The Bachelor‘s thesis named „Computer models of telecommunication lines“ is in introduction aimed to description characteristic quantity of telecommunication lines. Next part describes models which simulates parameters of telecommunication lines in depend on frequency of carried signals. Following chapter describes proposal constants for UTP cabel of category 5e. Constants are used in model BT#0. In the end of this thesis is summary of reached results.
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Simulation scenarios in NS2 demonstrating knowledge obtained in the MPKT course
Mašek, Jan ; Mlýnek, Petr (referee) ; Jeřábek, Jan (advisor)
The aim of the bachelor´s thesis is to develop simulation tasks for modeling of data networks. The tasks will be used in the course Modern communication technique (MKPT). The networks are simulated in the environment of Network Simulator 2 (NS2). A brief description of program environment NS2, as well as basics of Tcl language is mentioned in the introduction. Described is the possibility of simulation HTTP protocol in NS2 using OTcl PagePool classes. Totally six proposed tasks form the core of the thesis. The first task uses PagePool/Math and displays the simplest communication between client, server and cache. Next task uses PagePool/CompMath and it shows the communication between client, cache, Web server, FTP server and FTP client. The task, that uses PagePool/WebTraf class, simulates communication between two clients and three servers. The last three tasks are of different topologies and course of communication using PagePool/ProxyTrace. The exercises of this class are the most complicated and their input files allow defining whole communication. The outputs of exercises are given in graphs, log files of HTTP communication and the last task contains detailed instructions.
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Model of communication system with the PLC channel
Kovařík, Tomáš ; Krajsa, Ondřej (referee) ; Mlýnek, Petr (advisor)
The aim of this work was to develop a model of a communication system with the PLC channel. The model contains different types of modulations with the possibility of their settings. The impact of a disturbance on different numbers of states QAM modulation has been evaluated. The theoretical part describes the PLC technology with its functions and the most widely used narrowband modulation.
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Usage of NS2 simulator in multicast networks
Hošek, Petr ; Mlýnek, Petr (referee) ; Koutný, Martin (advisor)
The thesis is focused on routing in data network, especially on network method of multicast. The first section closely deals with particular multicast protocols and next with models of multicast, mainly Any Source Multicast and Source Specific Multicast. The main point of this work is implementation of multicast using Network Simulator. On the practical level, two laboratory exercises are included. In this part, readers have the possibility to make sure of reached knowledge of multicast and its implementation in NS2.
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QoS in IP network with the help of OMNeT++ simulation tool
Hudec, Lukáš ; Mlýnek, Petr (referee) ; Růčka, Lukáš (advisor)
The content of this thesis is giving information about the network simulator OMNeT++ and its superstructure INET Framework. In this thesis a sample simulation of IP network with the help of simulation package INET Framework is realized on this theme. The thesis also deals with analysis of possibilities, how to assure quality service in IP networks and subsequently implementation quality of service in surrounding of network simulator OMNeT++ and its superstructure INET Framework. The implementation is accomplished by two methods. The first method is implementation of differential service, in other words DiffServ, with the help of change the behavior of output. This change rest in sorting of data packets to different queues by their device priority. The second method shows principles of the technology MPLS and also function code protocol OSPF. The MPLS technology is realized by special routers with implemented moduls reservation protocol.
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Design of Advanced Simulation Model of DiffServ Technology in Opnet Modeler Environment
Machata, Tomáš ; Mlýnek, Petr (referee) ; Hošek, Jiří (advisor)
The aim of this bachelor´s thesis was to get acquainted with the problems of ensuring quality of service in IP networks. The greatest attention was devoted to DiffServ technology and methods for the identification and classification of network traffic at edge routers. Simulation model of DiffServ technology was created in OPNET Modeler environment. This model contains a number of edge and core routers, switches, servers and client stations on which it is generating a network traffic (VoIP, HTTP, FTP and databases). Individual applications were included in different classes at the edge routers of DiffServ domain and the different behavior of the applications was ensured with usage of an Assured Forwarding PHB. It was found by using simulations which method of classification packets is the best for the quality of service. Furthermore the model of DiffServ technology was extended about alternative route. OSPF routing protocol was configured here and has been studied the impact of failure of the main line and using of alternative routes to the quality of service.
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Communication protocol for messenger
Bílý, Ondřej ; Rášo, Ondřej (referee) ; Mlýnek, Petr (advisor)
Bachelor‘s discuss on theme Communications protocol for messenger and his security. The introduction analysis the basic points of cryptographic security of data. Next two parts deals with the two most used architectures in the area of information network, which helps in understanding of sending data by this network. Penult deals with the creation of the communication channel in between the applications in the information network.. The final part includes description of three uncomplicated applications. This demonstrates the use of various cryptographic securities and various protocols for the sending of information between the users.
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Narrowband data transmission over the power lines
Valenta, Jaroslav ; Mišurec, Jiří (referee) ; Mlýnek, Petr (advisor)
This bachelor´s thesis is focused on narrowband data transmission over power lines. At first are described possibilities of narrowband data transmission over power lines, next the type of noises and then thesis deals with parameters of communication channel. In this thesis are described too modulation, error corection and data encryption for reliable communication. In the last part of thesis are realized practical measuring in laboratory workplace. The influence of data communication on primary function of power lines are tested. In the end are realized measuring of noise influence on data communication.
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