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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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Triple Play simulations for next generation networks
Sikora, Pavel ; Polák, Josef (referee) ; Horváth, Tomáš (advisor)
This thesis deals with XG-PON networks. It describes the parameters of the physical layer, its divisions and the branching possibilities. It also describes the transfer layer and its sublayers, discloses the activation process of ONU units when ONU unit connected to ODN. Finally, the thesis describes DBA algorithm including a detailed representation of a DBA algorithm reference model and a representation of the two DBA algorithms implemented in practice. Simulations of Triple Play services in the network with software NS-3 are also included. Simulations using simple DBA algorithm and GIANT algorithm. Thesis contains too modification of GIANT DBA decreasing data trasfer delay.
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Services Optimization in FTTx Optical Access Networks
Horváth, Tomáš ; Křepelka, Václav (referee) ; Vlček, Čestmír (referee) ; Filka, Miloslav (advisor)
This thesis deals with an optimization of Triple play services and security in optical access networks. The first chapter provides theory basics which are necessary for results evaluation. The second chapter describes optical access networks with their parameters such as transmission speed, split ratio, line code, bit error rate etc. defined by ITU. Next chapter summaries the current state in optical networks construction field according to the European Union developing plan. The practical part of this thesis is divided into several subchapters. The significant part of the thesis is dedicated to the security of passive optical networks and design of proper security model for current networks. For this purpose, the unique parameter time propagation Tprop, with the novel security model was developed. Next part of the thesis provides an analysis of control traffic and data traffic in the gigabit passive optical networks. For a novel algorithm in activation process in gigabit passive optical networks the measurement results were used. The novel algorithm decreases the total time needed for this process. The last but one subchapter deals with an ILP model for Triple Play services. The last subchapter contains the own implementation of the transmission converge layer in VPIphotonics simulation tool.
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Extension of optical fiber transmission system
Horský, Tomáš ; Tomašov, Adrián (referee) ; Dejdar, Petr (advisor)
The diploma thesis describes the elaboration of a program for the simulation of an optical transmission path. The work introduces the basic parameters of optical transmission, such as attenuation, dispersion and bandwidth. Furthermore, the techniques of line code and error detection are described in the work, especially a cyclic redundancy sum. The key parameter of this thesis is dispersion of the optical signal. The work includes the characteristics of the eye diagram and its analysis. The resulting program can also be used to measure the real transmission route and its parameters.
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FTTx network design
Tejkal, Vladimír ; Němec, Karel (referee) ; Reichert, Pavel (advisor)
The main goal of this diploma thesis was to implement the proposal of optical access networks in the selected location. Introduce is focused on the physical layer of network. This includes optical fibers, optical cables, connectors, optical splitters, and more. According to the place of termination of optical fiber will be studied best FTTx connections. According to network topology distinguished point to point and point to multipoint network. Networks points to point are also known as an active optical network and for each user are restricted to a separate fiber. Point to multipoint networks known as passive optical network. In terms of the PON is defined by many standards. For a selected location will be choice the most appropriate solution. Finally, the measurement will be made and will be considered for monitoring the route. Before the design of optical access networks, I made an illustrative simulation in program OptSim. Performed simulations helps to study the transmission characters of optical networks, depending on the physical architecture. In general, for the design of high-capabilities networks for large companies will be more appropriate active topology that provides due wavelength multiplexes high transmission capacity. To join in the urban areas with a large number of separate houses, it is more appropriate use of passive topology. For the design of optical networks has been selected location with multiple housing buildings. The end customer is not given the requirement for high data transfer rates as large companies. For the proposal was selected FTTB networks which is suitable because of lower costs. The second variant of the proposal was a passive optical network according to standard GPON. This standard was chosen because of the high splitting ratio. For both solutions was developed the entire proposal by ITU-T with a detailed drawing documentation. In the selected area was conducted measuring the optical networks in order to verify the possibility of extension actual solutions. For a sample issue of measurements, I made several measurements using optical reflectometer over an optical splitter in order to prove the need for measurements during construction. FTTH networks gaining in popularity more and more, but price is the limiting factor.
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Design, implementation and measurement of passive optical network
Kužela, Jan ; Horváth, Tomáš (referee) ; Vojtěch, Josef (advisor)
The aim of this thesis is to formulate the design of optical access network in designated area. The design is focused on the physical network layer and it covers optical fibers, cable protectors and links, optical hubs, racks and active components. The thesis also docu- ments network architecture, the configuration of active components and provides results from monitoring of selected network segments. The thesis consists of the theoretical part and practical part. In the theoretical part, there is an introduction to optical networks, their configurations (FTTH, FTTB, FTTC, FTTN), relevant networking standards and technologies. The practical part of the thesis covers design proposal of a network located in Slavičín. The design reuses infrastructure and technologies of existing network. The proposed design follows FTTH architecture which has benefits of low maintenance cost and it also fulfills GPON standard.
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Partial renovation of metropolitan optical network infrastructure
Cichra, Petr ; Lávička Otakar, Mgr., MU, https://is.muni.cz/osoba?prezdivka=xlavick1 (referee) ; Novotný, Vít (advisor)
This bachelor thesis is focused on rebuilding of active metallic-optical network in locality Brno – Zábrdovice, in the streets Šámalova, Kuldova a Krokova on purely passive optical network based on xPON technology with possibility of further expansion of capacity. The partial goal is a thorough analysis of the current state and the main proposal is the solution of modernization of the existing network infrastructure into xPON and then implement this proposal. The theoretical part of the bachelor thesis describes the problems associated with these technologies with regard to current and future trends in the construction of optical networks. Furthermore, the economic intensity of the investment in this reconstruction will be evaluated.
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Implementation of Pasive Optical Network
Klaška, Patrik ; Jordán, Vilém (referee) ; Ondrák, Viktor (advisor)
This bachelor´s thesis is focused on making a complete proposal optical access network for emerging buildings, and later connect other sites in the village Hrušky near the town of Slavkov u Brna. The main goal is the implementation of FTTx networks, describe the problems associated with them with regard to current and future trends in the construction and management of these networks.
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Simulation of Triple Play services in XG-PON networks in NS-3
Cymorek, Patrik ; Münster, Petr (referee) ; Horváth, Tomáš (advisor)
The main goal of this paper was to familiarize ourselves with Triple Play service and to determine the possibility of simulating this service in NS-3. The first chapter of this document describes optical networks in detail. In the next chapter, we describe and analyze Triple Play service, including consideration of its advantages and disadvantages. Future development of the service is described at the end of this chapter. A short description of the Quality of Service and the BitTorrent protocol is included at the end of the theoretical section of the paper. The topology that we used for the simulation of Triple Play service in XG-PON networks is presented in the practical part of this paper. We simulated Triple Play services in the topology that we designed. The results of the simulation are presented graphically with the help of files that were recorded during the simulation. Comparison of the simulated results with real behaviour in network is included at the end of the practical section of the paper.
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GPON Frame Detection System
Holík, Martin ; Münster, Petr (referee) ; Horváth, Tomáš (advisor)
This diploma thesis deals with GPON frame detection system. Partial problems of designing databases, optical networks and management of database system are described in theoretical parts. Practical parts this thesis are focused on design of system for detecting GPON frames and script for analysing of traffic.
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