Aim and problem: Our aim with this study is to understand the dynamics on Colombian broadband market and the business opportunities arising from it. For that purpose we have formulated the following 3 research questions: 1) What characterizes the Colombian broadband market? 2) How can broadband contribute to development in Colombia? 3) Who benefits from business opportunities on the Colombian broadband market?   Method: The authors have chosen the qualitative study method in order to have better understanding, explanations and analysis of the problem. The collection of the empirical data has been conducted through interviews in Colombia.   Result & Conclusions: Research has shown that broadband  in Colombia is still under development and is present mainly in urban areas while rural areas still show a great lack of the service. Operators are offering triple play service which includes telephone, Internet and television at different speeds and prices.   The development of Broadband has a positive economic impact on the Colombian society and contributes to increase competitiveness and is a driving force for economic by stimulating productivity.   Suggestions for future research: The study has been limited to Colombian broadband market, the broadband technology and services based on broadband technology. The authors suggest for a future research to study how the expansion of broadband in rural areas in Colombia will affect the life and the businesses.   Contribution of the thesis: This study contributes to the understanding of the present situation of the broadband market in Colombia and the business opportunities open for vendors, operators and end users.

This thesis describes the problems of access networks and their existing types. It discusses the important parameters for multimedia services. It considers the possibility of using various networks at the localities. It presents modern multimedia services and their requirements for access networks. Next step describes the possible use of QoS to optimize access networks used for multimedia services. Multimedia services to different types of networks and limits which these types of networks have, are simulated in the program Opnet Modeler. Measurements of values important for securing quality of services are implemented at selected real access networks. In conclusion, the results of simulations and measurements are subjected to comparative analysis.

Cílem této práce je analyzovat současný stav přístupových optických sítí,a hlouběji prozkoumat PON metodiku a návrh sítě. Navrhnul jsem síť založenou na konceptu FTTH pro 90 rodinných domů ovládané z centrální stanice vzdálené 20 km. Zabýval jsem se problémy při návrhu FTTH, konkrétně pasivní optickou sítí. Dále jsem se zabýval ATM-PON a Ethernet PON (EPON), které jsou založeny na společné síťové architektuře, PON, ale používají jiné přenosové technologie na podporu integrovaných služeb a jiné protokoly. Po zadání (optimálního) síťového řešení, které se hodí pro nabídku Triple-Play služeb. Dále budu popisovat, jak fungují síťová propojení a také budou popsány metody měření a testování navržené sítě "po aktivaci a nastavení sítě" a "před aktivací síťových služeb ". Při měření jsem také používal OTDR a prakticky ověřil charakteristiku linky. V práci je také naznačeno monitorování optické sítě.

Cette thèse concerne l'investigation détaillée du problème du temps de zapping dans les réseaux d'opérateurs offrant un service IPTY basé sur la technologie multicast. Cette investigation a conduit à plusieurs contributions qui permettent de substantiellement améliorer le temps de zapping dans ce type de réseau. Notre première contribution concerne la partie purement réseau. Nous avons proposé d'optimiser le processus de changement de chaîne et ceci pour chaque version du protocole IGMP. Cette optimisation réduit la latence due au réseau sans pour autant augmenter la consommation de bande passante d'une manière significative. Nous avons modélisé le service IPTV Multicast pour estimer les pics de consommation de la bande passante pour permettre à l'opérateur de dimensionner son réseau. La deuxième contribution concerne la partie traitement du flux IPTV par le récepteur. Dans cette partie, nous avons proposé d'associer au flux principal un flux secondaire, version retardée du principal. La construction du flux secondaire se fait en donnant une priorité élevée aux paquets transportant des éléments d'une I-Frame par rapport à d'autres types d'éléments (P­ Frame, B-Frame, Voix et Data). Cette nouvelle règle de construction permet de réduire le délai d'attente de la première I­Frame nécessaire pour commencer la phase de décodage tout en réduisant le temps de remplissage du buffer. Dans un environnement réel, nous avons évalué cette contribution et constaté une réduction remarquable du temps de zapping. / This thesis involves a detailed investigation of the problem of IPTV zapping time in networks of operators providing IPTV service based on multicast technology. This investigation led to some contributions that can substantially improve the channel change time in this type of network.Our first contribution concerns the pure network. We proposed an optimization of the channels changing process for each version of the IGMP protocol. This optimization reduces network latency without significantly increasing the bandwidth consumption. We proposed also a model of multicast IPTV service that we used to estimate the maximum bandwidth demand. This model enables the operator to size the bandwidth availability in its network.The second contribution relates to the processing part of stream IPTV on the receiver. In this section, we proposed to combine the main flow to a secondary flow, delayed version of the main stream. The construction of the secondary stream is clone by giving high priority to packets carrying elements of an I-frame compared to other types of elements (P-Frame, B­-Frame, Voice and Data). This rule of construction can reduce the First I-Frame Delay required to start the decoding phase and at the same time reduce the Buffering Delay. In a real environment, we evaluated this contribution and measured a remarkable decline of the zapping time with our proposal.

Made available in DSpace on 2016-04-04T18:31:19Z (GMT). No. of bitstreams: 1 CARLOS SALDANHA.pdf: 2117803 bytes, checksum: 2021a031c03613d9b6c2df0e8e8aba68 (MD5) Previous issue date: 2007-06-28 / Digital Inclusion is currently a concerning subject especially in those urgent countries. In Brazil there have been various initiatives and experiences regarding this subject, both from government parts (Federal, State and Urban) and through Non-Profitable Organizations and private companies. The approach to low-cost Broadband Internet has been one of the main barriers to the effectiveness on these initiatives. The goal of this current work is to find new concepts and connection management and voice services, data and video (triple play) in a unique wireless connection focusing on digital inclusion. The used wireless technology is the World Interoperability for Microwave Access (WiMAX), whose frequency is of 5,8 GHZ, which permission is not required for its usage along with National Telecommunication Agency (ANATEL) and to the access point, the wireless fidelity technology (Wifi). Some main convergent WiMAX technology characteristics are described in this work with new Triple Play services to hold a multipoint-point enlacement, causing an establishment to link a case study between the School and PUC-Campinas in order to investigate the performance and application factors. The results on the efficiency of metropolitan wireless network (WMAN) as well as the Triple Play services were profitable, defining a new method on prediction of coverage area and user s quantity. / Inclus?o Digital ? hoje um tema de muita preocupa??o, principalmente nos pa?ses denominados emergentes. No Brasil existem diversas iniciativas e experi?ncias relativas a esse assunto, tanto por parte dos governos (Federal, Estadual e Municipal), como tamb?m por parte de ONG s e empresas privadas. O acesso ? Internet Banda Larga a baixo custo tem sido uma das principais barreiras para a efetiva??o dessas iniciativas. O prop?sito do presente trabalho ? definir novos conceitos e par?metros de conex?o e servi?os de voz, dados e v?deo (triple play) em uma ?nica conex?o sem fio com foco na inclus?o digital. A tecnologia de conex?o sem fio (wireless) utilizada ? o World Interoperability for Microwave Acess (WiMAX), de freq??ncia 5.8 GHz, que n?o requer licenciamento para a sua utiliza??o junto a Ag?ncia Nacional de Telecomunica??es (ANATEL) e para o ponto de acesso, a tecnologia wireless fidelity (WiFi). Neste trabalho est?o descritas as principais caracter?sticas da tecnologia WiMAX convergentes, com os novos servi?os Triple Play para a realiza??o de um enlace ponto-multiponto, estabelecendo-se um link para estudo de caso entre a Escola e a PUC-Campinas, para a investiga??o dos fatores de desempenho e aplica??es. Os resultados de efici?ncia da rede sem fio metropolitana (WMAN) com os servi?os Triple Play foram satisfat?rios, definindo-se um novo m?todo de predi??o da ?rea de cobertura e do n?mero de usu?rios.

This graduation thesis addresses questions of deriving benefits from the FTTx optical access network. This project is divided into four main subject surveys. First part contains familiarization with individual architecture of FTTx network, topology of network and the use of components in these access networks. Second part shows how ideal optical access network is for distribution of modern multimedia services which pose great demand on the width of transmission band. It also shows success and trend growth of integration of the optical network into access segment in the Czech Republic and the rest of the world. The choice of right proposal and follow-on project of FTTx optical access network in assigned location is described in part three. It also compares investment costs needed for implementation of these proposals. Final part of this project shows financial budget and return of investments of a proposed access network. It also includes a contemplation of optical access network’s development.

Diplomová práce se zabývá problematikou rozvoje širokopásmového připojení (broadbandu) k Internetu v České republice. Snaží se odpovědět na otázky nízké penetrace domácností Internetem u nás a překážek jejího rozvoje. Práce ve své úvodní části obsahuje analýzu v Česku nejrozšířenějších dostupných možností připojení k Internetu a jednotlivých nabízených služeb včetně formulace nutných podmínek na trhu pro rozvoj broadbandu v ČR. Na tuto analýzu navazuje kapitola trendů v oblasti broadbandu, tedy pohled na plány významných subjektů v Česku i ve světě, na současnou do jisté míry latentní poptávku po službách využívajících broadband infrastrukturu a projektované zákaznické potřeby. Z této analýzy vyplývají důležité závěry, které jsou následně využity pro formulaci doporučení v podobě klíčových faktorů úspěchu firem působících na broadband trhu. Další text práce se rovněž zabývá současným stavem GTS Novera a dívá se i na její veřejně dostupné plány dalšího rozvoje. Načerpané teoretické znalosti jsou následně použity ke zpracování samotného přínosu práce, jímž je case studie zasíťování modelového pražského sídliště broadband infrastrukturou a navržení reálného technicko-ekonomicko-obchodního modelu pro společnost GTS Novera k realizaci byznys plánu v těchto konkrétních podmínkách. Následně jsou tyto výsledky zasazeny do rámce studie návratnosti investice s návrhem nových služeb pro další rozvoj společnosti GTS Novera.

The aim of this thesis was to ascertain with the measurement methods of passive optical networks and the creation of a simulation model that corresponds to the measured network and comparison of results. The first chapter deals with Triple Play services, which are focused on different services (transmission of television signals, voice and data transmission). Each service consists of a subchapter and presents a detailed description of the parameters associated with the transmission. The second chapter of the theoretical part consists of an analysis of passive optical networks according to termination method of FTTx optical fiber. Partial part of this chapter consists of description of standard passive optical networks APON, BPON, GPON and EPON. The EPON standard is explained in detail. The theoretical part of the thesis is concluded with a description of active elements that will form the laboratory measured network. Testing of designed passive optical network is performed in the practical part of the thesis. The measurement is divided into two chapters. The first chapter consist of measuring of the „inanimate network“, as there are missing active elements in the nominated net. Network measurements were done by a direct measuring method and reflectometric method. The second chapter of the practical part consists of measuring the parameters of quality of service (QoS). This chapter is divided into subchapters, such as: the measurement using RFC 2544 standard, the measurement using ITU-T standard Y.156 (EtherSam) and bit error rate testing (BERT). The practical part ends with a designed simulation network model, which was proposed in OptSim 5.2. The aim of the simulation model was to maximally resemble a real network, due to result comparison.

The thesis deals with dynamic bandwidth allocation in passive optical networks of NG- PON2 standard. The paper also describes the so-called. triple play services and the practical part is a simulation of these services in passive optical networks NG-PON2 in the simulation environment OMNeT ++. As part of this work modules for passive optical network NG-PON2 were created as an expansion of project INET. Namely ONU, OLT and splitter modules were created. The first four chapters are theoretical and descibe older standards PON networks, further NG-PON2 networks and DBA algorithm then describes triple play services and explains their current status respectively. In another part a description of the programm OMNeT++ a description of the structure of simulation models. The practical part contains a description of modules, implementation of DBA algorithm and its modification, design simulated topology and detailed description of the configuration simulation. At the end of the practical part presents the results of simulations with the corresponding explanations.

This master thesis deals with implementing triple-play services and providing it’s quality of services in heterogenous comunnication networks. The aim of thesis is to apply the- oretical methods in real case and existing network infrastructure. Practical part aims to create technical solution to prioritize network traffic based on classification of required services. The technical solution is created with conditions of being possible to add more functions and to provide scalability.