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Software defined optical network
Kloda, Tomáš ; Horváth, Tomáš (referee) ; Kočí, Lukáš (advisor)
This thesis is focused on explanation of software defined networking and communication via OpenFlow protocol with description of transmitted messages. This thesis deals with software defined optical networking, which describes combinations of OpenFlow with other technologies and methods to control the optical path. In another part, the thesis is focused on the description of the physical layer of optical backbone networks, where there is a description of multiplexers, DWDM technology and optical elements. This thesis also includes designs of software defined optical network with implementation of extended header for transmission in the optical domain. Outcome of this thesis are simulations, which include synchronization between the elements during initialization of software defined optical network with occurence of delay. At the end, the thesis is focused on simulations of the actual data transfer within the proposed software defined optical network.
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Connection simulation between master and end unit in passive optical networks
Moravcová, Klára ; Kočí, Lukáš (referee) ; Horváth, Tomáš (advisor)
The purpose of this bachelor’s thesis is to introduce and explain the standards of passive optical networks, their way of establishing connection between master unit and end unit in a network, as well as creating a working simulation in Matlab. The first chapter of this thesis covers the description of optical networks. In the chapter, individual layers of the GPON standard by ITU-T and the EPON standard by IEEE are described. The process of an ONU unit activation towards the OLT unit of these standards is covered in detail. The thesis describes the following standards: EPON, GPON, 10G-EPON, XGPON and NG-PON2. The practical part covers the simulations of the mentioned standards, which are displayed in the form of graphs. The results are interpreted through comparison of the graphs with various input parameters (number of connected ONU units and the length of the distribution network) with a final evaluation of these results.
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Wavelength selective switching
Sikora, Vojtěch ; Kočí, Lukáš (referee) ; Münster, Petr (advisor)
Optical circuits switching is a rapidly growing area of photonic networks. With increasing requirements of photonic services only software defined networking allows flexible and effective networks creation. This bachelor thesis introduces technologies of optical circuits switching, especially wavelength selective switching node as reconfigurable optical add drop multiplexer used in wavelength division multiplexing networks. Using specialized software VPIphotonics the WSS 1x4 and ROADM for an interconnection between Prague, Brno, Ostrava and Vienna was designed.
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Upper structure construction technology phase for lesure time building
Kočí, Lukáš ; Nečasová, Barbora (referee) ; Venkrbec, Václav (advisor)
The aim of the thesis is to solve selected parts of the building-technological study of the gross top-structure for the object of the Centre for leisure-time activities in Jihlava. The bachelor's thesis is a technical report of a solved object, a technological study of the implementation of the main technological stages for the given building, a timetable for the construction of the technological stages of the rough construction, the basic concept of the construction site, the situation of the building site equipment, the technical report of the building site, Dimensions of gross overhead construction, technological regulation after masonry and prefabricated ceiling construction, occupational safety and health protection, design of machine assemblies. A control test plan for masonry and prefabricated ceiling constructions.
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The modulation techniques used in WDM optical networks
Lučenič, Lukáš ; Filka, Miloslav (referee) ; Kočí, Lukáš (advisor)
The main goal of the diploma thesis is DWDM simulation of optical network, defined by recommandation ITU-T. Optical network includes 16 communication channels with length of fiber 50 km. Each channel have to be set with bandwith 50GHz and Bit rate with minimal value 10Gbit/s. The final simulation model includes 8 types of modulation techniques. The result of the thesis is comparison modulation techniques in terms of usability of bandwith and comparison of the quality of transfer
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Influence of the frame size on splitting ratio in the passive optical networks XG-PON
Kočí, Lukáš ; Horváth, Tomáš (referee) ; Münster, Petr (advisor)
The diploma thesis deals with the theoretical definition of passive optical networks, furthermore the description of methods of channel bundling in passive optical networks and the coexistence and migration between standards. The main essence of this work is the XG-PON (10-Gigabit-capable Passive Optical Network) standard. This standard is generally defined along with a description of the physical layer. The transport layer is detailed analysis. There is a description of conditions, under which the Optical Network Unit pass through, when is activated. Additionally, this diploma thesis focuses on the processes of connecting Optical Network Units to the Passive Optical Networks and the timing relationships between Optical Network Units and Optical Line Terminal. The simulations demonstrate that as the number of simultaneous connections to Optical Network Unit increase, longer wait time for each additional connection becomes. This also solves the collision conditions, that might arise in communication and the equalization delay. Finally, the diploma thesis deals with the influence of a refractive index on timing relationships.
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Appartment house in Nymburk - Construction Technology Project
Kočí, Lukáš ; Nečasová, Barbora (referee) ; Venkrbec, Václav (advisor)
The aim of the thesis is the solution of selected parts of the building-technological project for a building in Nymburk. The content of the diploma thesis is a technical report for a building technology project, a study of the realization of the main technological stages of the building, a technical report of the building site equipment, a design of a machine assembly, a technological regulation for the execution of masonry from concrete blocks and folded ceiling constructions, a control and test plan for the implementation of masonry from concrete blocks and execution of folded concrete ceilings, OSH plan on site. In the appendix of the thesis I elaborated drawings of construction site equipment, item budget of building, object budget according to THU, construction schedule, material resources plan and dimension of building machines.
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Impact assessment of split ratios on passive optical network
Gallo, Martin ; Kočí, Lukáš (referee) ; Horváth, Tomáš (advisor)
This thesis deals with the most recent passive optical network standard NG-PON2, describes the sublayer model which includes error correction coding during propagation in optical fibres. Assesses the impact of split ratios using the simulation environment created from defined model and compares various scenarios. Discusses possible sources of errors of simulation model in compare to real deployment.
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The Influence of Modulations in optical networks based on OTDM
Kočí, Lukáš ; Šifta, Radim (referee) ; Münster, Petr (advisor)
The bachelor thesis inquires into influence of modulations to transfer in optical nets, with the 320 Gbit/s zone width, based on the OTDM principle. There are also explained effects impacting on the signal transfer by optical fiber, single-mode and multi-mode op- tical fibers are described here and also principles of used technologies of multiplexing are explained. There is compiled the proposal of transmission system, which is subsequently simulated in the OptSim programme. On the initial simulation model there are the mo- dulation formats tested progressively, patterned on theoretic knowledges and its influence on the transmission quality is evaluated.
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Coherent optical communication systems
Štohl, Jakub ; Münster, Petr (referee) ; Kočí, Lukáš (advisor)
This bachelor thesis deals with the possibilities of coherent optical networks. Describes the elements of a coherent network. The practical part deals with the simulation of coherent optical networks using PM-QPSK and PM-16QAM modulation for bandwidth of 112 Gbit/s and 224 Gbit/s.
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