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Optimization of signalization channel for Internet television
Matej, Michal ; Balej, Jiří (referee) ; Müller, Jakub (advisor)
The aim of this Bachelor's thesis is to propose a mechanism for optimizing the signaling channel in case of Feedback Target overload in hierarchical aggregation tree. Consequently to this verify the implementation of this mechanism in simulation environment of Java and to achieve the balance load among Feedback Targets. The theoretical part discusses the significant differences between traditional television transmission and television transmitted via the IP protocol, the methods of data transmission in IP network and key protocol called Tree Transmission Protocol working on the application layer of TCP/IP model. In this part there are explained the concepts of hierarchical aggregation of feedback channel such as Feedback Target Manager, Feedback Target, as well as packets FTD, FTS, and FTI.
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Managing Planetlab nodes
Chupáč, Michal ; Balej, Jiří (referee) ; Müller, Jakub (advisor)
Bachelor’s thesis is focused on maintaining and managing PlanetLab nodes from one place. Introductory chapter contains process of network access creation and other important information and guidance. Following part involves remote access thru command prompt by program CoDeploy. This program is used for parallel command execution and file upload to multiple nodes. The thesis contains installation and configuration manual for applications CoDeploy, Plush and Nebula, description of their functions and practical usage in PlanetLab network environment. Section about graphic user interface Nebula deals with module for XML application development. Part with PlMan software alternative for Windows is also completely made out. Ending of the thesis is focused on CoMon monitoring system, its functions, elements and practical application in network.
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Node localization on the Internet using domain name system
Dvořák, Petr ; Müller, Jakub (referee) ; Komosný, Dan (advisor)
This paper describes various systems that are used to predict delay among nodes . It focuses on systems using for prediction delay artificial coordinate systems, and on the systems, which use physical measurements of delay. Primarily, however, it deals with the King method, which uses the system for translation of domain names - DNS (Domain Name System) to predict the delay. Next, the principle of the King method is outlined in detail. Practical part includes a description of the two created simulations in program Matlab. The first application described simulates the King method principle. The second simulation is then tasked with creating 2D geometric space in which nodes and DNS servers are randomly generated. The result is dependence of RTT prediction accuracy on the number of randomly generated DNS servers. Based on this dependency the method King is compared with other methods in the end.
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Synchronized data transfer of signalling in IPTV
Figurny, Roman ; Karásek, Jan (referee) ; Müller, Jakub (advisor)
The task of Bachelor's thesis has been to develop synchronizing mechanism for signaling servers, called Feedback Targets, in hierarchical structure of the feedback tree. Then verify the function of this designed synchronizing mechanism in simulation developed in Java. Using this synchronizing mechanism to shorten the time needed to travel the signaling packets trough the feedback tree and using this to obtain better reaction to possible network junction or significant packet loss while distributing multimedia data while using IPTV. In theoretic part of the thesis there are described basic protocols like RTCP, RTP and TTP. Then are described methods for packet sending in network (multicast, unicast and broadcast). The basic piece of knowledge about IPTV, its distribution and differences between IPTV and classic internet media streaming are described. Also basic terms like Feedback Target, Feedback Target Manager and FTI, FTS and FTD packets are described as well.
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Voting service for IPTV
Menclík, Tomáš ; Karásek, Jan (referee) ; Müller, Jakub (advisor)
This thesis deals with a concept and implementation of voting service for IPTV. Implementation of this service is executed in programming language Java and uses programming structures, which were already done. These structures are intended for simulation of propertys of tree transmition protocol. Outside of the concept and implementation of voting service, there are presented protocols, which IPTV uses for communication. And also voting service, implemented in this thesis, uses their propertys. There are also mentioned dierences between outlined and implemented voting service as the implementation does not keep strictly the concept of the voting service.
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JavaME Application for Betting on sport results
Kubalík, František ; Müller, Jakub (referee) ; Číka, Petr (advisor)
This bachelor thesis deals with the design and implementation of applications for mobile terminals, which allows user to bet on sports games. The functionality of this application is dependent on a central database, whose proposal is also part of this work. The first section describes the basic features of programming languages, which were used for the implementation of the project. Gradually, it is described in Java, SQL and PHP. The correct formation of tables and a description of problems that may arise in the design of the database are mentioned. Next chapter describes the actual implementation of the project. It described the methods and a more detailed description of the implementation of the various parts the project comprises. This section also contains a test created by the application.
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SIP Client for Windows Mobile
Regueyra, Philip ; Müller, Jakub (referee) ; Číka, Petr (advisor)
The main objective of this thesis is the design and implementation of client software, which will be able to conduct a phone connection through the packet network. Signalling protocol SIP together with RTP, the protocol for the transmission of multimedia, is used for this intention. Structure and functioning of the SIP protocol and RTP protocol is analyzed in this thesis. This is introducing with the issue, not a detailed study of these instruments. In addition, a brief overview of the Windows Mobile operating system for which the application is intended primarily is released. The characteristic of several libraries that have been considered for use in the application is briefly described in this thesis. Next the design of solution and the analysis of the program follow. In the last part the functioning of the program is described and its behavior is tested in various model situations.
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Simulation of IP node localization, using Vivaldi and GNP algorithms
Sulík, Peter ; Komosný, Dan (referee) ; Müller, Jakub (advisor)
The work deals with the issues of network coordinate systems. The first chapter is devoted to a brief analysis of this systems and requirements placed on them. Furthermore, it deals with features of Vivaldi algorithm and its three versions: a centralized algorithm, algorithm with constant and adaptive time step. Subsequently it describes the GNP system and eash step of Nelder-Mead method for nodes localization. Next to it a developed simulation library is presented with its own graphical user interface for testing of these algorithms, which is capable of handling RTT responses database amongst individual IP network members. Simulations performed on data from PlanetLab network are evaluated in the conclusion.
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Geolocation of Internet hosts
Ingr, Michal ; Müller, Jakub (referee) ; Balej, Jiří (advisor)
This master thesis deals with methods of stations’ geolocation on the Internet, it means the estimation geographic location of unknown station, which is conected to this network. The introductory part describes the methods for determining position, which don‘t need any measeruments of the network. The next section is devoted to points, where delay is invoked, to the causes of latency in the Internet, to their types and some usual values. The following part features ways to measure delays and route, including several tools for this purpose. The penulminate section describes some chosen geolocation techniques based on RTT measurement. The final chapter is devoted to practical demonstration geolocation using the CBG method, when the delay measurement was carried out in an experimental PlanetLab network.
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Localization of nodes in Internet using King system
Exler, Michal ; Müller, Jakub (referee) ; Komosný, Dan (advisor)
This thesis is focus on problematics of nodes localization in Internet. There are describe methods for prediction latency by using artificial coordinates systems and by using direct measurement. This thesis is primarily focus on method names King, which is estimates latency between arbitrary end hosts by using recursive DNS queries in system for translate domain name.
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