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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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Analysis of data transport in converged network
Menšík, David ; Hošek, Jiří (referee) ; Škorpil, Vladislav (advisor)
This thesis deals with data transmission applications in the converged network, focusing on the WiFi network IEEE 802.11. The theoretical part describes the cause and nature of converged networks. One chapter is devoted to a description of IEEE 802.11, which is next to different standards and options described architecture, coordination and access network QoS solution to that standard. The research is based on custom design converged networks, and WiFi elements in the environment of graphic simulation software OPNET Modeler. In the proposed network was also simulated the operation of services such as voice, video conferencing, FTP and HTTP streaming. Results of simulation data traffic in the network are then analyzed. At the Conclusion of the thesis, is in OPNET Modeller program created the role of laboratory. The essence here is the comparison of operating a converged network, with and without quality support services.
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Design of Mobility Model for Nano-Devices in NS-3 Simulation Environment
Miklica, Jan ; Kováč, Dominik (referee) ; Hošek, Jiří (advisor)
This thesis focuses on the description of nanocommunication networks, models for wireless communication networks and the description of motion in nanocommunication networks. The practical part describes the settings of the simulation scenarios for the definition of Brownian motion. Description is made for the simulation software NS-3 and N3Sim. In this thesis, the measured results of the simulations are summarized in tables and graphs. From the measured results the regression analysis is prepared. General summary of the results is provided at the end of thise thesis.
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Implementation of a simulation model for a simplified DiffServ-MIB database
Zeman, Otto ; Hošek, Jiří (referee) ; Molnár, Karol (advisor)
The aim of this work is to propose feasible solution for the simulation of the SNMP (Simple Network Management Protocol) protocol in the OPNET Modeler simulation environment. This work describes in detail individual procedures, which were chosen for this simulation . The work also contains an introduction to the OPNET Modeler simulation environment, the SNMP protocol, the DiffServ model and the DiffServ-MIB database. The main part of this work describes the algorithms programmed to model the functions of the SNMP protocol. Source codes of the algorithms programmed are included as well. The work deals especially with the functions for obtaining values from different levels of a multilevel model attributes, packet creation functions with dynamically changing length of user-data field, for the implementation process of a simplified DiffServ MIB database and with the functions for statistic creation.
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Traffic Management in UMTS Network
Menšík, David ; Novotný, Vít (referee) ; Hošek, Jiří (advisor)
This thesis is describing UMTS network, architecture and especially maintaining Quality of Services in this network. Specifically is focused on operation control management in UMTS network. Practical part contains description of settings for UMTS network with QoS and following operational simulation. This simulation was performed in OPNET Modeler v.14.5. Others simulations were performed with different settings of QoS. Results of three simulations were compared and by that operational dependence on QoS settings was verified.
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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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Analysis of Quality of Service Assurance in Wireless Networks
Hornyak, Tomáš ; Kouřil, Jiří (referee) ; Hošek, Jiří (advisor)
This Bachelor thesis deals especially with possibilities of quality of service assurance and mobility implementation in wireless networks. It deals primarily with the possibilities of the IEEE 802.11e standard, with the applicability of the Mobile IPv4 protocol and with the computer simulation of their mutual coactions in the OPNET Modeler 12.0 environment. In the first part of the thesis the standard IEEE 802.11e is first of all analysed from the theoretical point of view. It is followed by the detailed description of the IEEE 802.11e standard, its individual parts and implementation possibilities of advanced technologies of the access to the medium which are included in the standard. In this part even the individual advantages and disadvantages of the original access methods of wireless networks of IEEE 802.11 standards are briefly outlined. Further part of this work deals with the theoretical analysis of mobility service assurance in the IP networks and with the mobility implementation in individual layers of the ISO/OSI models. Then the Mobile IPv4 protocol is presented here that carries out the mobility in the IP networks. The principle of this protocol is mentioned here and its individual components and the network architecture are presented. In the next part, on the basis of theoretical pieces of knowledge in the environment of the OPNET Modeler simulation tool the effect of the standard IEEE 802.11e implementation is examined on the selected statistics of the wireless local network. Furthermore the effect of the load in the network is followed up and standard modifications are discussed here to reach optimum results. The last part deals with the computer simulation of the Mobile IPv4 protocol in the wireless networks. Then the support of the IEEE 802.11e standard is implemented into the functioning network model and the reciprocal coactions of both technologies and a possible appearance of any problems are examined. For comparison, it is here in the OPNET Modeler environment even the mobility simulated which is based solely on the link layer.
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Quality of services support in the end applications
Zelinka, Jiří ; Novotný, Vít (referee) ; Hošek, Jiří (advisor)
The topic of this diploma thesis has been chosen for a discussion and implementation of quality of service on the application and link layer of the OSI model. At the beginning of this thesis the general parameters and basic technologies of the OSI model network layer has been explained. This part was chosen as a resource for explanation of the basic parameters in the quality of services. Basic part is followed by the introduction to the Ethernet technology, which became as a ground for the real model in this diploma thesis. As a part of this section has been written a block which contains a analysis of quality of services in the Ethernet, which means the implementation of IEEE 802.1Q/p. This analysis is followed by structured descrition of the controlling and functionality of quality of services parameters on the link layer with the system tool in the Windows XP, description of Win XP link layer drivers and its modification with system tool tcmon. The end of the theoretical part is represented by introduction to the implementation of quality of service in the wireless networks especially the 802.11e standard. At the beginning of the practical part is specified the description of the topology design which is dedicated to the quality of services implementation. This section is developed to well-founded analysis of applications which were used during topology creating. The last segment of this thesis is dedicated to evolving the practical informations which were obtained during the measurement.
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Mobile IPv6 handover analysis
Klügl, Richard ; Hošek, Jiří (referee) ; Skořepa, Michal (advisor)
This master’s thesis is focused on IP mobility support for mobile users and their devices in IPv6-based wireless networks. Then the Mobile IPv6 (MIPv6) protocol was proposed for this purpose and that is also the main objective of the thesis. This consists of several basic sections and is organized as follows: The first one deals with the overview of the function of Mobile IP, which enables the mobility of nodes around the Internet, without a change of their original IP address. Moreover there are introduced the primary differences between MIPv6 and its previous version – i.e., MIPv4, proposed for IPv4-based environment. The second chapter of the master’s thesis thereafter describes detailed information about all the most important mechanisms and features of Mobile IPv6 and this way tries to explain principles of its functioning. Further the thesis analyses some of proposed MIPv6 extensions – i.e., Hierarchical Mobile IPv6 (HMIPv6), Mobile IPv6 Fast Handover (FMIPv6) a Fast Handover for HMIPv6 (F-HMIPv6) protocols, and mainly aim at signaling process during the handover of a mobile node. In the last main section of the master’s thesis an analytical method to evaluate the performance of IPv6-based mobility management protocols was proposed. Subsequently, this method is applied on the protocols which were mentioned above and are studied the effects of various network parameters on the performance of these protocols.
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IEEE 802.1x for LAN network admission control
Čuhel, Radim ; Hošek, Jiří (referee) ; Slavíček, Karel (advisor)
This semestral work deals with the control of access to current local networks using IEEE 802.1X protocol. At the beginning of the thesis are the basic concepts of network access control and possible standards and protocols that are used today. The practical output is the implementation of an authentication server in the form of a virtual server in the laboratory, creating a sample network configuration and a laboratory task in which other students will be able to learn the IEEE 802.1X protocol.
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