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Trends in Access Networks
Štěpán, Petr ; Křepelka, Václav (referee) ; Filka, Miloslav (advisor)
This work deals with the modern trends in FTTX, but mainly focuses on FTTH, who represents the connecting of fiber to the homes of the participants. Sum up the basic problems of communication on the optical fibre, followed by comparison with other types of access networks. Another part is the analysis of the problems of construction and a description of the optical network topologies and technologies used in FTTH. In following chapter are characterized active and passive elements forming AON and PON networks. Next part deals with the study of the most common services that can be on the optical access network to operate. They are mainly associated with the TriplePlay services. An integral part of the project is the study of management and supervision optical networks. In the main part is created real model situation where is the requirement for the creation of optical access networks with broadband of TriplePlay, followed by selection of appropriate options and detailed project with a selection of active and passive elements with economic balance.
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FTTx networks
Hradílek, Pavel ; Reichert, Pavel (referee) ; Filka, Miloslav (advisor)
The aim of this thesis is to clarify the issue of optical access networks, and to acquaint the reader with problems of their design and implementation. The introductory chapter describes the technologies and topologies, which are the most experienced in dealing with optical access network. There are a comparison of their basic parameters and limiting factors. Another part of the work is dedicated to progressive methods of construction such as microtubes and solution using the hanging cables, which due to the efficiency of construction, rapidity, economic and facilitate implementation. In conclusion the theoretical part there is issues of measurement. It describes a Optical Loss Test Set, OTDR method and method of measuring dispersion. Increasing demands on the capacity of the transmission paths, and their quality are caused of monitoring optical access networks, which can evaluate the failure on a route, target problems and inform service. The practical part compares EPON and GPON. In program OptiSystem was created model which these technologies are evaluated in terms of performance parameters, noise, jitter and eye diagram quality. The common feature of technology is transmission TDM frames, where EPON uses Ethernet and GPON technologies ATM. The outcome of simulation don´t show which technology is better, but result shows the conditions of the proposal of these technologies. At the end of work there are created several models for solving the optical access network with pricing per user. The most developed technology is FTTB in urban areas, when transmission in last mile uses copper circuit. This solution causing a rapid return on investment. Other technologies such as point-to-point FTTH or PON are implemented as individual proposals. Each of these solutions has advantages and disadvantages, so each project is unique and the solution is dependent on the project site and the requirements of customers.
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FTTH deployment in local networks
Horníček, Lukáš ; Křepelka, Václav (referee) ; Filka, Miloslav (advisor)
The master’s thesis is focused on the theoretical and practical issues of optical access networks. The first chapter of the thesis deals with the concept of the access networks known as FTTx. The second and third chapters focus on the principles and standardization of the active optical network AON P2P and the passive optical network TDM PON. The fourth chapter of the thesis focuses on the network WDM PON, wavelength multiplexes, solution concept and the LG-Ericsson EA 1100 platform. The fifth chapter of the thesis deals with the infrastructure of the optical paths for optical access networks. The sixth chapter of the thesis presents custom design of the headend for reception, processing and distribution of television broadcasting. Two custom access network solutions (AON P2P and WDM PON) for the town Bystřice nad Pernštejnem are presented in the seventh chapter. Case studies include the design of the optical paths infrastructure, central office infrastructure, end-user infrastructure, CAPEX/OPEX economic analysis and basic simulation in OptSim.
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Modern optical access networks
Třetina, Vítězslav ; Münster, Petr (referee) ; Šifta, Radim (advisor)
The bachelor’s thesis is about technology of passive optical networks. In the introduction, the paper focuses on introducing the basic functional elements of the networks and describes the different possibilities for implementing fiber optic lines as close as possible to the user. The main goal of the theoretical part of this work is the analysis of the various standards of passive optical networks. These specifications are described in the second and fourth chapter, where are discussed their different technical parameters. Particular attention is given to the technology of wavelength division multiplexing. The conclusion of the theoretical part is devoted to the description of the measuring instruments which are suitable for measuring C/DWDM systems. The practical part of this thesis is divided into two sections. The task of the first section is about creating two animations where the first of them shows the principle of passive optical networks based on wavelength division multiplexing (WDM - PON). The second animation is focused on the practical demonstration of a combination of wavelength and time division multiplexing (WDM/TDM - PON). The second section of the practical part consists of simulating multiple scenarios of passive optical networks in the OptSim 5.2. In these scenarios are searched for maximal possible parameters PON networks such as reachable attenuation, reachable distance or split ratio.
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Design, development and measurement of optical access networks
Ambrož, Jan ; Šporik, Jan (referee) ; Tejkal, Vladimír (advisor)
The work deals with the possibilities of realization of optical access networks. They are introduced to FTTx optical access, including their specifications and differences. The document was largely devoted to passive and active optical networks. These two different technological approaches are explained and compared. Are presented technical solutions of routes - traditional options for laying underground or into the air, but also as an alternative microtubing. Mentioned are also the active network technology. The work also included the issue of measurement of optical access networks. They are illuminated important transmission parameters and methods for their measurement. The whole work is directed to the full FTTH network design according to the standard GEPON. In designing the use of theoretical information contained in each chapter. It does the form of technical documentation in accordance with the procedures used in practice, contains drawings, specific technical solutions and a detailed budget price. The design was verified by attenuation of balance. Finally there are the results of simulations of the proposed network in OptiSystem7.
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Optical network FTTH
Horníček, Lukáš ; Dostál, Otto (referee) ; Filka, Miloslav (advisor)
The bachelor's thesis „Optical Network FTTH“ is a theoretical and practical analysis of problems of optical access networks with respect to current and prospective trends in the construction and operation of these networks. For the clearness of thesis done divided into 6 chapters. The first five chapters deal with the optical access networks at a theoretical level with a touch of practical knowledge in the academic analysis. The first chapter deals with general concepts networks FTTH and defines the reasons for their occurrence. The second thematic chapter specifies an individual topology implemented in optical networks FTTH, their advantages and disadvantages with respect to transfer capacity and the economic-competitive potential of the network. It is defined by a principled division of optical networks in the active and passive with the definition of network architectures, communication models and protocols. The individual architectures are evaluated for suitability in the deployment of networks FTTH. The third and fourth thematic chapters inform readers with the passive and active access network FTTH infrastructure. Passive infrastructure examines the method of construction used in the past decades and the latest technology microtubing that this networks concept prevailed. The fifth thematic chapter provides Triple Play services and reasons for using these services just for FTTH optical networks. The sixth chapter is a crucial element in this thesis. Results and knowledge acquired in previous chapters is applied to real network model. It is defined by imaginary the village "Fektákov" for which they are created by three case studies covering technical and economic documentation for the realization of a real access FTTH network. This allows compare the modern ways of realization network infrastructure, including central office and subscriber terminal equipment. The results of these three case studies, conclusions are drawn that highlight the strengths and weaknesses of these architectures and also suggest the quality and reliability of these networks and the expected future prospects of development. Conclusion of the thesis is an evaluation of all evidence obtained in this work reflects the author's view on current and expected future developments in optical access networks leading its optical fiber to homes or apartments of all households.
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DWDM in access networks
Šifta, Radim ; Křepelka, Václav (referee) ; Filka, Miloslav (advisor)
The aim of this master´s thesis is an explanation of the problem of optical access networks with wavelength division multiplex, main purpose is to demonstrate the difference between simulation and real measurement. The thesis is divided into several basic thematic areas. At the beginning of thesis is outlined the basic division of multiplexing system, there are discussed the basic solutions of wavelength multiplexes and their possible combinations. The next chapter deals with the active elements, which are an essential part of xWDM systems such as optical lasers, detectors and amplifiers. The following chapter is focused on the passive elements, especially on the passive filters, which form a key part of the wavelength multiplex. Methods of measurement C/DWDM networks are discussed in the next part of thesis. The next chapter describes the topology used by active and passive optical networks. Penultimate part of this thesis consists of designs simulated models PON and WDM-PON networks and comparing their transmission parameters. The final part presents the results of practical measurements of experimental optical access network with wavelength division multiplex, the results are simultaneously compared with results of simulations.
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Design of FTTx optical access network
Münster, Petr ; Tejkal, Vladimír (referee) ; Reichert, Pavel (advisor)
The aim of this work is an overview of the proposal for FTTx Optical Access Networks. In the introductory chapter written about the optical fiber and the transmission. Furthermore, as already discussed various options with regard to the implementation instead of the end of optical fiber - FTTN, FTTC, FTTP, FTTB, FTTH and standards, which are used to build fiber optic networks. The next chapter is an overview of the network elements that are in different layers reference model ISO / OSI used. The final theoretical chapter is devoted to progressive technologies for the construction of optical access networks, which has recently been used. Concepts are explained as HDPE pipe, microtubing or self-supporting cables. The practical part design model, passive optical networks in the area Slavičín, located in the Zlín region. FTTB architecture was chosen, where for each connection object is used in the existing copper lines. The proposed route will use a standard technology GEPON Wavelength division WDM, so to connect the individual buildings will be used only one thread. Realization of optical networking technology will be excavation. The optical cables and optical fiber bundles are protected by HDPE pipes stored in the bed of sand. For the optical signal split into multiple lines will be used by an optical splitter 1 / 16, located in an outdoor cabinet optic pathway. The distribution of signals for the settlement will take care Alloptic central station, which is optimized for the transmission of Triple Play services. On the basis of the proposal is to created a financial analysis that shows the return on the project. An important part of the network is also monitoring the network. The last part of this work therefore deals with the possibilities of monitoring networks in order to continuously monitor the network, in order to prevent any disturbances or quickly respond to network problems.
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Communication protocols in passive optical networks
Ševela, Martin ; Šporik, Jan (referee) ; Tejkal, Vladimír (advisor)
This master´s thesis explores a comparison of the transmission parameters in time division networks and wavelength division networks. The paper is divided into the three sections. The first part deals with preparation of individual standards time division networks and specific wavelength division networks, along with passive components used passive optical networks. The second part briefly describes the possibility of transmission of television signals in optical networks and the last part is devoted to simulating networks GPON and WDM-PON and comparison simulated values.
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FTTB Network Design
Reichert, Pavel ; Křepelka, Václav (referee) ; Filka, Miloslav (advisor)
The purpose of this master’s thesis is to explain the issues of the FTTx network design. The main idea of this work is to describe to readers the methods of the designing the optical access networks. Especially we will speak about the building technologies and different topologies used in a practice. The different technologies of optical access networks’ building and various parameters, which are necessary to take into account in the designing of these networks, will be introduced. In the theoretical part, methods of measurement, which are like the needed part of each optical access networks’ building, will be described. Two purposes of the FTTB networks with all proprieties will be made and offered. One purpose will be solved by Point to Point topology and the second purpose will be solved by Point to Multipoint topology. Following the confrontation one of these purposes will be chosen and realized. By ITU recommendation, measurements will be performed on the built optical trace. The final protocols will be elaborated from these measurements. The built trace with all final reports will be prepared for assignment to the subscriber.
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