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Analysis of parameters and communication protocols on radio interface of UMTS networks
Plhák, Jan ; Skořepa, Michal (referee) ; Novotný, Vít (advisor)
These times the third generation cellular networks are getting in use increasingly and they dramatically exceed the parameters of second generation networks. Third generation networks are in contrast to older generations data-oriented, providing better maintenance in data and multimedia services. The most widespread third generation network is the UMTS, designed as succesor of GSM network. Master’s thesis is focused on parameters and communication protocols of radio interface of UMTS network. Parameters of radio interface affect the behaviour of mobile terminal through utilization of network services. This thesis describes individual protocols of radio interface and individual procedures, which the mobile terminal have to perform through its staying in the cell. Theoretical part of this thesis considers description of the UMTS network and individual procedures and parameters. Practical part is focused on measuring the radio interface and individual procedures in real UMTS networks. Some procedures are simulated in network simulation software. This thesis includes a lab task focused on this thema.
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Mobile IPv6 in OPNET Modeler
Žáček, Martin ; Růčka, Lukáš (referee) ; Skořepa, Michal (advisor)
Master’s thesis includes knowledges about mobility support in IPv4 networks and studies abilities for mobility support in IPv6 networks. Describes protocols for mobility support, their functions and topologies like MIPv6 (RFC 3775), FMIPv6 (RFC 5568), HMIPv6 (RFC 5380) and F-HMIPv6. The thesis contains a design of the simulation MIPv6 in the OPNET Modeler program and the measured results are explained. There are analysis of source code for mobility support in MIPv6 too, which were used for design a new protocol according to FMIPv6 in the OPNET. The following parts of the proposal have been successfully resolved. The link-layer events detection, which triggers FMIPv6 protocol and implementation of two new types of messages, RtSolPr and PrRtAdv. Knowledges from this thesis could be used for next development of FMIPv6 in the OPNET. But could be used for generaly development new protocols working at network-layer too.
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Managing Mobile IP enabled networks with SNMP protocol
Závodný, Ondřej ; Vajsar, Pavel (referee) ; Skořepa, Michal (advisor)
The content of this thesis is to research possibilities of using SNMP for management of Mobile IP activated entities. The first two chapters deal with theoretical analysis of Mobile IP protocol, and Simple Network Management Protocol. The Mobile IP protocol analysis focuses especially on the elements Home agent and Foreign agent. In the SNMP chapter the analysis focuses mainly on ways to exchange messages. Another part of the document is devoted to a description of laboratory networks com- posed of routers Cisco 1841 and the configuration of them. Finally is described the programmed application to manager these devices in JAVA, which is included in Annex. The program periodically sends SNMP queries and finds relationships between the Home agent and the mobile nodes, and between the foreign agent and the mobile nodes. The application has a user-friendly interface that is shown on the attached flash animation. Finally, the thesis summarizes the concepts described in previous chapters and the goals to achieve.
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Optimization of hand-over process in real network environment
Hornyak, Tomáš ; Skořepa, Michal (referee) ; Molnár, Karol (advisor)
This Master´s thesis deals especially with exploration of the handover process and with searching for ways of in?uencing this process. The goal of this thesis is to create tools for recording of access point utilization and in?uence the handover of wireless clients based on the obtained data. An access point with open ?rmware, which allows low-level management, was necessary for practical tests. First chapter deals with a survey of current o?er of open ?rmware available for access points and then the appropriate candidate for this thesis is chosen – the OpenWRT project. Second chapter deals with the con?guration of OpenWRT system and basic settings of the chosen wireless router – TP-Link TL-WR1043ND. Next chapter deals with analysis of the handover process in wireless networks. Information obtained by this analysis is used during the creation of the graphic application. The fourth chapter presents the basics of Microsoft Native Wi-Fi API and introduces basic functions used by this API. Those functions were used during the creations of the application. Last two chapters present the created graphic application. The ?fth chapter deals with the application design and examination of its functionality and used functions. Last chapter then documents usability of the application in real environment.
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Acquisition of service information from current terminals of GSM and UMTS cell networks, service procedures for mobile terminals
Kříž, Jakub ; Skořepa, Michal (referee) ; Novotný, Vít (advisor)
This thesis concentrates on the UMTS cellular network and the possibilities of its monitoring. There are several methods of monitoring the UMTS. The technique used in this project is based on monitoring through a cellular terminal. The theoretical part is devoted to the description of the UMTS system and the WCDMA technique. The practical part then deals with the method of UMTS monitoring through a cellular terminal and describes in detail individual screens of the FTD (Field Test Display) program, the Netmonitor functions and their parameters. The next part of this thesis analyses the RRC messages, which were recorded during the realization of services (video calls, calls, data transfers) in the UMTS network. The last chapters of the thesis are briefly dealing with software and hardware servicing of cellular terminals. The attachment then offers two lab tasks, in which the students get acquainted with the UMTS network structure and the behaviour of the cellular terminal in this network.
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Network mobility in Mobile IP
Havelka, Michal ; Novotný, Vít (referee) ; Skořepa, Michal (advisor)
his semestral thesis is focused on issue network mobility (NEMO) beeing extension of protocols Mobile IPv4 and Mobile IPv6. It describes basic principle function of protocols Mobile IP, defines differences between mobility of nodes and mobility of network and suggest various situations, which may occur in combination these two protocols. Further, it describes differences between basic protocol network mobility (RFC 3936) for IPv6 and it’s extension (RFC 5177) for IPv4. Practical part of work consist in simulation network mobility in application OPNET Modeler and discussion of results, which has been discovered on the base of this simulation.
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Scale free topology networks focused on MANET technology
Sehnálek, Adam ; Janovič, Filip (referee) ; Skořepa, Michal (advisor)
The main goal of my bachelor thesis is familiarization with a question of computer network with free topology aimed at MANET technology, or more precisely Motorola MESH. It deals with simulation of influence of bundle number within the network on data transfer using all possible routing protocols in Opnet Modeler. The first part contains description of basic networks with free topology and their characteristics. It devotes mainly to Mesh networks and mostly to Motorola technologies that are described there. All three Motorola network types can be found there - MOTOMESH Solo, MOTOMESH Duo and MOTOMESH Quattro. The second part of the thesis focuses on routing protocols available for MANET networks in Opnet Modeler. Principles and basic characteristics of protocols AODV (Ad-hoc On-demand Distance Vector), DSR (Dynamic Source Routing), OLSR (Optimized Link State Routing protocol) and TORA/IMEP (Temporally-Ordered Routing Algorithm) a GRP (Geographic Routing Protocol) are described there. The closing part of the thesis is dedicated to the simulation of individual protocols and their influence on transferring multimedia data through the network. It includes exact process of making the MANET network, configuration of individual components, choosing the necessary characteristics and after simulation view. It concludes also the final summary of all simulated protocols.
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Routing protocols in scale-free topology networks
Mahdal, Ondřej ; Kyselý, František (referee) ; Skořepa, Michal (advisor)
This master's thesis (further only MT) deal with problems of scale-free topology networks with a view to technology MANET (Mobile Ad hoc network) or more precisely Motorola MESH. Further studies routing technique and quality of services (QoS) in these networks. Theoretic part of MT in introduction shortly characterizes properties and kind of Ad hoc networks, next part is dedicated to technology Motorola MESH and shows practical usage of this technology. Analysis of problems quality of services and optimalization QoS in MANET is content third parts of MT. Fourth part specifies division of routing protocols, analysis of routing in MANET and characteristics routing protocols OLSR, AODV, DSR and TORA. In practical fifth part of MT are in introduction simulated simple MANET and mesh networks and further is created model of MANET network, into the model are implemented accessible routing protocols in simulation program OPNET Modeler and on the basis of simulation these protocols or more precisely output statisticians of simulation are protocols compared from several aspects and suitability for transmission of multimedia data (voice, video).
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Generation of data units in OPNET Modeler environment
Mikulica, Vladimír ; Skořepa, Michal (referee) ; Hošek, Jiří (advisor)
This dissertation deals with the generating of data units at different levels of TCP/IP network model in OPNET Modeler environment. A part of the dissertation is a brief introduction to the simulation environment OPNET Modeler where important components of this comprehensive simulation software are elucidated. The structure of my dissertation reflects individual layers of the model TCP/IP, whereas the function of the process model OPNET Modeler and the data unit used at corresponding levels of TCP/IP is always described. Particular parts of communication models that were created in the simulation environment OPNET Modeler at selected layers of the network model TCP/IP are closely documented in each chapter. Relevant scenarios are described in such a way that they can be later re-arranged by eventual customers.
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Measuring of data communication parameters in computer networks
Šeda, Pavel ; Hošek, Jiří (referee) ; Skořepa, Michal (advisor)
Master‘s thesis is focused on basic characteristics of data transmissions in computer networks. In forepart I digestedly described basic characteristics computer networks, metods of their measurement and valuation. Computer networks type LAN as well as wireless computer networks Wifi, are mentioned. In second part I realized my own proposition of basic characteristics measurement. This proposition is used for SW applications development. Main goal of these applications is measurement of packet delay, packet jitter, paket loss and available bandwidth. I described details of SW applications and realized measurement of real computer networks in the end.
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