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Experimental network for QoS support testing
Fogl, Miroslav ; Mácha, Tomáš (referee) ; Novotný, Vít (advisor)
The work specifies problems with support of qualitative requirements in IP network services on the network and link layer. There are also described options of qualitative support of individual networking components in the UTKO laboratory (routers, L3 switches). Created experimental network is loaded by various types of service (VoIP, FTP, HTTP, Video). Data services realization is ensured by available terminals (IP phones, IP cameras, IP video-phones, servers, client stations). Metering is targeted on the manipulation with packets in the router. Options which Cisco router offers are verified by packet analysis. Available methods of dropping are compared on the base of metering and evaluated. Optimal handling with output queue after metering in experimental network is LLQ mechanism. It is able to prefer packets according to their priority in the IP header. Further the difference of link overloading by huge dataflow after QoS policy using is simulated. To reach availability of data services in the whole network is necessary to deal with mechanisms for qualitative services support in all the network components in the network.
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Design of Switch Used in Modern Communication Networks
Mojžiš, Ľubomír ; Novotný, Bohumil (referee) ; Škorpil, Vladislav (advisor)
This diploma thesis deals with switching components of modern communication networks. A switch architecture focused on the quality of service is described in this paper and there are two switch models designed and simulated in the simulating program MATLAB-SIMULINK. The first model is based on classic switching and the other one is controlled by neural network. A laboratory exercise suitable for communication networks education is created in this paper on the basis of designed models.
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Switch optimization in converged network
Švec, Adam ; Sobek, Jiří (referee) ; Škorpil, Vladislav (advisor)
Switch Optimization in a Converged Network thesis discusses the role of the Ethernet switch in the network. It describes differences between the switch and the hub in the network and the impacts on the collision domain size. In the converged network, priority data switching according to their origin and thus the qualitative point of view is also addressed - e-mails, voice services and multimedia will each behave differently. A real element, switch L3 - a switch with services quality support - is mentioned. The tool Matlab - Simulink is briefly described and a functional simplified model of the ethernet switch was created. Furthermore, the topic was used as a theme for a laboratory task in the subject Services of Telecommunication Networks. A model for Simulink and an example of the laboratory protocol for the created task are attached to the thesis.
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Testing of QoS support in experimental data network
Fogl, Miroslav ; Škorpil, Vladislav (referee) ; Novotný, Vít (advisor)
This work deals with the qualitative requirements on services in IP networks based on technology Ethernet. We describe basic methods for imposing quality control mechanisms on services within networks. We elaborate on the ways, in which packets can be handled, overload controlled and transfer speed in network elements limited. Attention is given also to the Network Layer and Link Layer. Based on concrete specifications of network devices in UTKO laboratory an experimental network was designed and constructed. Network consisting of routers and switches linked several servers with client stations. Various types of data transfers (VoIP, HTTP, FTP, video) were generated. Several techniques for handling packets with different priorities were verified and compared. We observed that, in situations when connections are under full load, implementation of QoS support in the network becomes very important. This observation was confirmed by measurements. We also measured the parameters of the system during simulations of various situations, such as overload of a connection due to unsolicited operations or failure of a connection between routers. In order to guarantee the quality of services it is necessary to create a domain, in which rules are consistently observed in all network elements.
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QoS in UMTS
Kavan, Radovan ; Hanus, Stanislav (referee) ; Kejík, Petr (advisor)
This thesis treats of QoS (Quality of Service) in UMTS system. The term quality of service is frequently used, recently, however not only in computer networks, but also more and more in mobile networks also. Present system of 2nd generation (2G) GSM enables only limited exploitation of QoS function. System UMTS is a system of 3rd generation (3G) already and contains quality of service in greater measure which is ensured with number of algorithms and functions. Individual QoS functions enable effective utilization of radio interface, support maintenance of planned coverage and offer high spectral efficiency. Functions that cater to quality of service are called RRM functions (Radio Resource Management). There exist five basic functions in UMTS system that are Admission control (AC), Power control (PC), Load control (LC), Handover control (HC) and Packet scheduler (PS). These functions are responsible for control of network access, control of power, control of network load, control of handover and packet (bit rate) scheduling. Last three functions are usually collectively designated as Congestion control, control of network overload. UMTS layer model, differentiation of services, traffic classes and 3GPP concept are also discussed. In thesis the attention is piad to Admission control algorithm – control of network access – in the uplink direction and to different ways of load (in the cell) modeling. Individual approaches are simulated in MATLAB. A possibility of using algorithm in the real system is discussed in conclusion.
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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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Usage of automated testing in terms of cost and benefits
Lízner, Tomáš ; Buchalcevová, Alena (advisor) ; Zelenka, Petr (referee)
This master's thesis is aimed at creating a methodology for the selection of suitable test for automation testing. The first part is devoted to the definition of the prerequisites for introduction of automated testing and the conditions for its effective course. The second part focuses on defining the exclusion criteria of tests which are unsuitable for automation. The following third part is devoted to defining the selection criteria for the determination of the test priority for automation. The selection criteria have been approved by the head of this thesis and consulted with the supervisor of the practical project, on which the criteria were tested for the first time. Based on these criteria, the individual manual tests are evaluated. Final count of points is used for determination of the test priority. The fourth section is devoted to calculation of the return on investment in automated testing. Because the investments made into the automated testing are very high, it must be assured that their amount will return for the selected period. The fifth part is focused on defining the principles for ensuring the proper maintenance of automated tests and describing the technical complications and frequent problems that may occur during automated testing. The last section is devoted to pilot verification of the methodology on a practical project and for determination of the test priority for automation.
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Public financial support of historic landmarks in the Czech republic and France
Jíša, Zoran ; Patočka, Jiří (advisor) ; Novák, Zdeněk (referee)
My bachelor work is concerned with the comparison of the interest of the Czech republic and France on the maintenance of historic landmarks, on the attitudes of the countries to the financial support of the historic landmarks and on the real consequences of these proceedings ensuring efficient implementation of their interest. The work aims to make out conclusion of the component findings and based on the conclusion, make suggestions which would be helpful for the Czech republic, by improvement of the proceedings ensuring the implementation of the interest more efficient. Indispensable attention is paid to tax advantage of the owners of the historic landmarks and on its motivational pattern stimulating the will of their ownership and of their economical use. In order to transparency, macroeconomical, basic geographical and demographical specifics are taken into consideration.
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A possibilities of strategic tourism development in the area Nová Paka
RYBOVÁ, Adéla
The aim of this thesis was to formulate possibilities of strategic tourism development in the area Nová Paka. This region, although not one of the best known tourist destinations of the Czech Republic, it certainly has enough natural and cultural-historical potential for tourism necessary. In addition, it is situated in a strategic location between the Giant Mountains and the Bohemian paradise. In 2005 Novopacko also incorporated in Czech Paradise Geopark, which belongs to the European Geoparks Network. Tourism should become one of the priorities for the development of the territory and improvement of the situation of the population. This can be particularly achieved by effective use of primary and secondary upgrading of tourism potential. The information found on the basis of marketing research and a SWOT analysis were divided into three thematic units - the natural and cultural-historical potential, basic and accompanying infrastructure and promotion of the region. Subsequently a vision, priorities and measures for development of tourism in Nova Paka were established.
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The Sectoral Operational Programme for Poly-Functional Agriculture and its evaluation
MARKOVÁ, Věra
The aim of this work is to get acquainted with possibilities of using financial resources for the Czech Republic as an EU member. There are mentioned synopses here of possibilities of using the structural funds of EU and pre-accession financial support. The work is focused on the Operational programme of Rural development and multifunction agriculture 2004 {--} 2006 and its evaluation in terms of formal EU requirements and in terms of utilizing of financial sources. In the second part of the work this programme is described including fundamentals of projects preparation and financial supports administration. The work is further focused on the financial framework and summary of using from this programme for individual years, regions and measures. Based on a database of the companies which asked for financial support within this programme, there are several economic indicators calculated. The work ends with assessment of possibilities of financial resources from EU, evaluation of the OP of Agriculture and adumbration of the situation of programme continuing for the period 2007 {--} 2013.
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