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Providing IP mobility in Wi-Fi and Wi-Max environment
Klügl, Richard ; Novotný, Vít (referee) ; Skořepa, Michal (advisor)
The bachelor´s thesis is focused on wireless networks within the context of providing support of IP mobility for these networks. This document consists of two main parts, the theoretical part and the practical part. The first one at the beginning includes simple characteristics and classification of wireless networks. Then it is followed by description of actual new trends in wireless networks, focused on the WiMAX technology (IEEE 802.16). At the end of this part is introduced the technology of mobile IPv4 address provided by the MIPv4 protocol. The second main part of the bachelor´s thesis deals with the practical implementation of the MIPv4 protocol into the Wi-Fi and WiMAX environment. For this object is used the OPNET Modeler 14.0 simulation environment, in which are made three network models of these technologies. This simulation shows function of the basic mechanisms of the MIPv4 protocol and reports which of these models have the best performance for supporting VoIP communication.
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Support of service quality demands in radio access networks of high speed variants of mobile networks
Kuruc, Jiří ; Skořepa, Michal (referee) ; Novotný, Vít (advisor)
The work deals with the developmental stages (Releases) of the third generation UMTS net-works. It explains a partial improvement from Release 99 to Release 5 and Release 6 to im-prove the quality parameters of a mobile data transmission. In the practical part, there are measured qualitative parameters of the third generation networks that are available in the Czech Republic: UMTS, HSDPA, CDMA 1xEV-DO Rev.0 and Rev.A and UMTS-TDD. The measurements give reasonably achievable data rates in both directions (downlink & uplunk), a response time, quality of VoIP calls, a dispersion, a data-loss and an ability to transmit video with different data flows. The other aspects especially an availability of coverage and end-user terminals have been assessed wihin the each network. The work is supplemeted with a laboratory, which is focused on a practical comparison of the basic parameters of data transmissions of 2G and 3G networks.
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Multicast Data Tunneling
Stodůlka, Stanislav ; Skořepa, Michal (referee) ; Šimek, Milan (advisor)
This document contains introducion of terms in routing multicast data and their tunneling in network. As well developing aplication in Java to test sending unicast and multicast data through network. Aplication are based on client/server. Document describe Linux daemon mrouted and alternativ daemons with similar function of routing multicast data.
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IPTV multicast model with RTP protocol
Ležák, Aleš ; Skořepa, Michal (referee) ; Šimek, Milan (advisor)
This diploma thesis contains questions of simulation data transfer by ASM multicast. In simulation tool Opnet Modeler is proceed design of service IPTV. IPTV means television which is transfered in network by IP protocol. Data of IPTV service are sending by multicast transfer. Multicast is a technology which uses a group transfer. It is actually communication of a one source of data with many users. These users are receiving the same data. A main target of this technology is to decrement loading of source node and transference system in distribution of data towards group of users. Most often is multicast used in distribution of audiovisual data. Relation RTP/RTCP is simulated with a different numbers of users. Observed is interval of transmission of control RTCP packets. This will be reached by two methods which will be confront in the end. One is a theoretic calculation by course of a equation and second is a practical simulation in Opnet Modeler.
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Verification of MANET Routing Protocol potentials in OPNET Modeler environment
Konečný, Daniel ; Skořepa, Michal (referee) ; Hošek, Jiří (advisor)
This bachelor’s thesis called "Verification of MANET routing protocol potentials in OPNET modeler enviroment" is focused on MANET network. The first part is introducing routing protocols that are most used in OM. The second part of that work is strictly aimed to DSR routing protocol, its parametrs and configuration in OM. There is also discribed DSR process model. The most important part of that thesis is extension of data unit of DSR protocol and use that unit for transmision of information that are stored inside of its structure. As the extended unit was chosen Route Request packet that include new variable. The simulations are proving succesfull traffic of extension packet between nods with ability to store/read from RREQ extended structure.
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Implementation of service functions for work with MIB database in simulation environment OPNET Modeler
Ruml, Martin ; Skořepa, Michal (referee) ; Molnár, Karol (advisor)
Implementation of service for work with MIB database is subjeckt the bachelor’s thesis. MIB database is system database which is instrumental for storage of control informations in network elements. A first chapter is instrumental like a introduction to the control computer networks. A second chapter describes the basic features of protocol SNMP. The protocol SNMP is a standardized application protocol which uses for a transmission control informacions from and to the system database MIB. The protocol is based on a draft manager-agent when the manager is mostly active who enquire of the agent for the values of concrete items. A next chapter deals with a structure and standards for the MIB database. It describes a basic enbranchment among the administrative organizations. A main part of working is devoted to a proposal and a implementation of servece functions MIB database. The main requirements for the MIB database in light of a cooperation with the protocol SNMP are identified in this chapter. These processes are trained-in to the experiment implementation of MIB database. The implementation is written in C++. A header file of the classes and supportive functions who implement basic mechanisms of MIB database and its methods for a tender the database created from the proposal. The header file contains the several processes for an easement of cooperation MIB database with the application protocol SNMP, too. A final chapter shows the using of designed classes. The created programe is equipped with a graphics interface who uses the functions for a local access. Very easy modul for the comunication with the database through the messages of SNMP is among next shown functions in the programe.
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Remote PC administration without IP address
Otruba, Vítězslav ; Skořepa, Michal (referee) ; Pfeifer, Václav (advisor)
The subject of the thesis is to design a concept of remote PC administration with intermediate unit, which allows the controlled computer not to have the public IP address. We don’t need to know its IP address at all, to take control over it. The designed system uses HTTP protocol to transport commands and replies. Central intermediate unit is the web server with PHP scripting, which cooperates with MySQL database server; the central data store. The commands are stored into MySQL database via web interface using PHP scripting. The target PC is running program in C++ language, which receives the commands by querying the PHP pages on web server, and sends the replies on them. The structure was designed as multi user system. Each user controls different target computer using unique login and password. In consideration of this is not allowed to use one login for two users at the same time and the users are automatically logged off in case of inactivity. As extra feature, not part of project’s main object, was designed the graphical user interface as add-on to the existing system, giving the user actual print-screen of target computer’s monitor. Also the mouse and keyboard functions are software-emulated. By creating the new autonomous data channel for screen pictures transfer, the new opportunity for bidirectional file transfer between controlling and controlled PC is opened.
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OSPFv3 dynamic routing protocol for MANET networks in OPNET Modeler simulation environment
Henzely, Július ; Skořepa, Michal (referee) ; Růčka, Lukáš (advisor)
This bachelor's thesis includes theoretical knowledge about fundamental informations related to functionality of mobile networks, with focus on MANET routing protocols. The project contains an overview of routing protocols, especially OSPFv3 routing protocol. In the practical section of project, there is a brief description of OPNET Modeler simulation environment and the process of establishing the network with configured routing protocol in it. The project also describes a procedure for extending of the Hello packet structure by a field containing node traffic speed in OPNET Modeler.
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Management centre for IP networks
Patala, Petr ; Skořepa, Michal (referee) ; Novotný, Vít (advisor)
This bachelor thesis deals with problems of network management and monitoring by the help of protocol SNMP and practice using this protocol. Main part is describing work with the program SNMPc, its configuration, making longterm statistics or dynamic and static parameters of network elements measuring, for example: data traffic on the router’s ports, measuring service avalaibility ftp, telnet etc., quality of service, quantity of discards pakets, informations about router’s ports, routing tables or ARP tables.
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Analysis of VoIP implementation in the WAN network of Třinecké železárny a.s.
Pieniažek, Ireneusz ; Skořepa, Michal (referee) ; Molnár, Karol (advisor)
This diploma thesis is focused on the implementation of the technology VoIP in the remote branch offices of a big company. There are used the current WAN lines, which have been so far used only for transfer of data. Implementation of IP telephony is extending the utilization of those lines and at the same time the costs for running of the telephone services are reduced. There are described the models for proposal and also the proposal for solution of IP telephony for a specific company.
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