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Verification of the statistical reliability of simulation results in OPNET Modeler environment
Fördős, András ; Vajsar, Pavel (referee) ; Hošek, Jiří (advisor)
Project is focused to verify the credibility of the results of statistical simulation in the surround of OPNET Modeler. At the beginning of the project is a short introduction to the problematic of OPNET Modeler. It describes the basic concepts of mathematical statistics, data types and some basic statistical charakteristics. In the project was created model of LAN network, were set up three different types of runs and several monitored statistics. In this project are listed setting of the model, startup parameters of some runtime simulations, prefered variety of statistics and the possibility to display final results of statistics. Description of options displaying final results of statistics is supplemented by model characteristics. Created model was further extended and modified. Have been added network services, has changed the number of nodes and the duration of the simulation. Results of analysis of the original scenario are compared to the results of a modified scenario, which are scheduled. At the end of this project are obtained result, recommended way and form of displaying basic statistics and advice on the number of simulation runs needed to obtain reliable results.
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Simulation of routing protocols in ns3 simulation environment
Masár, Marek ; Hošek, Jiří (referee) ; Vajsar, Pavel (advisor)
The first part of thesis is about networks that are divided based on area. It includes also basic characteristic of Manet networks. The next chapter is about distribution of routing protocols into preactive, reactive, hybrid. In the simulation, there is comparison of 3 routing protocols, which are described in this chapter. The simulation is performed in program called Ns-3, more specifically in version 3.14. In the third chapter, this network simulator is described more closely. Here is also mentioned its continuity on previous version Ns-2. The goal of this simulation is to create a network with implemented routing protocols and with certain number of nodes, which has configured mobility, so the network looks like Manet network as much as possible. There are also 2 applications created, which were used to determine the delay for each routing protocol. Another part of thesis is about implementation of the quality of service (QoS) and energy model for each routing protocol. Energy model was used to calculate the remaining energy of node. Next activity summarizes how the implementation of QoS changed delay for used applications and how it changed the energy consumption of a node. The result of thesis is that the voice applications was preferred after the QoS implementation. The value of delay increased for ftp application. Percentually, the improvement for voice traffic was 30-31 %. The increase of delay was percentually 7-19 %. The difference in remaining energy after QoS implementation was about 1%. The actual amount of battery in the beginning of simulation was 1 J.
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Simulation of mobile ad hoc network in NS-3 environment
Kolaja, Lukáš ; Hrouza, Ondřej (referee) ; Hošek, Jiří (advisor)
The goal of this bacherlor thesis is theoretically analyze the principles of wireless mobile ad hoc networks. The thesis describes the types of routing protocols such as AODV, DSDV or OLSR. Further describes the types of mobility models which is typically used in MANET. The thesis also deals with issues like use, safety and development of mobile ad hoc networks. The goal of the practical part is create an application which can parse an XML document that generates simulation that is already created. The application is written in PHP language and output data from this application is inserted to the databse by using SQL commands. From the database is easy to read the data from the original XML document.
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Development of evaluation model of MANET in NS-3 environment
Gilík, Aleš ; Vajsar, Pavel (referee) ; Hošek, Jiří (advisor)
This bachelor thesis is focused on Manet networks and creation of web application for generate configuration file which is simplifying simulation of Manet networks. The theoretical part concerns with description of Manet networks, distribution of routing protocols and closer look on five of the protocols. In the next part is described simulator Ns-3 with his content for simulations. The practical part is describing creation of configuration file and his elements. For that was created web application in PHP language. All used technologies for creation of the application are described in this thesis. The web application is fully processed and operational.
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Modelling of network communication in OPNET IT Guru environment
Mazák, Andrej ; Škorpil, Vladislav (referee) ; Hošek, Jiří (advisor)
The aim of this work is to describe modeling of network communication with the given network performance and load. The selected model of network approaches the real network topology of a telecommunication operator that provides network services for the customers. We take a closer look on the functions of the significant network protocols EIGRP and BGP and we also will focus on their configuration on the selected network devices. Routing in the network will be analyzed in the individual project scenarios with a use of selected routing protocols. Routing policy will be enforced for a BGP protocol in a separate scenario with an aim to prefer a concrete routing path to the destination, which is a common case of traffic engineering. The issue of virtual private networks is also taken into a consideration in an individual scenario, where there is Firewall as a specific network device used for separation of networks of a different trustworthiness and a following introduction of IP tunneling for an encrypted communication among the selected network entities within the topology. Simulation of the network communication is aimed on the response of FTP service, time delay of Ethernet, throughput of backbone links and communication flow in the targeted scenarios. The output of this work deals with the analysis of the achieved results, comparison of graphs as well as evaluation of the determined simulation parameters.
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Analysis of wireless environment using the Ekahau system and the possibilities of cooperation with other systems
Tinka, Zdeněk ; Bartl, Milan (referee) ; Hošek, Jiří (advisor)
The work is divided into two parts. Firts of all deals with surveying and analysis of wireless environment. It contains familiar with analysator Ekahau Site Survey. Below are implementation of the map and then surveying of quality of networks. Finally describes the evaluation results and optimization of networks. The second part describes the localization of objects by AeroScout system using a wireless environment. It occurs in the theoretical description of the topology and equipment necessary for proper operation and practical work progress and evaluate the second part.
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Service quality support in WLAN networks
Mizera, Josef ; Hošek, Jiří (referee) ; Novotný, Vít (advisor)
The bachelor´s thesis is focused on wireless networks WiFi and the transmission of multimedia using these networks. It discusses the connection of telecommunication and data networks, their common use for transfer of data in real time, particularly through wireless transmission medium using standards IEEE 802.11. It describes individual standards 802.11, mainly 802.11e on which is this bachelor´s thesis focused. The second part of the work is focused on designing the networks for measuring to verify the functionality of service quality support in the tested networks.
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Universal platform for remote management of IoT devices and visualization of M2M data
Štůsek, Martin ; Hošek, Jiří (referee) ; Mašek, Pavel (advisor)
The aim of this diploma thesis is to create universal application able to visualize M2M data and allows remote management of smart sensors using TR-069 protocol. First part of this thesis contains comprehensive evaluation of TR-069 standard and OSGi platform. Next, extensive analysis of embedded databases with detailed description of SQLite platform is provided. Auto-configuration server genieacs and modus TR-069 client, two parts needed for the proper run of remote configuration, are described in more detail in following section. Practical part of this thesis contains description of all created OSGi bundles together with communication interfaces. Moreover, the description of designed database and developed user interface is given.
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Design and implementation of 3D printer with network printing support
Špringer, Radek ; Hošek, Jiří (referee) ; Krajsa, Ondřej (advisor)
The goal of this thesis is to design a 3D printer type delta. To describe 3D printing technologies used by this printer, basic printer features and commercially available material used at the print and its comparison. To define all hardware components, which are necessary for construction of the 3D printer type delta. To create a proposal and construct an expansion board to which all hardware components of the printer will be connected. To optimize the print space heating and cooling of the printout. To extend the 3D printer with a Web server, which will ensure the network printing possibility.
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