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Broadband access technologies

Pereira, João Paulo; Pires, José Adriano
Fonte: Instituto Politécnico de Bragança Publicador: Instituto Politécnico de Bragança
Tipo: Conferência ou Objeto de Conferência
Português
Relevância na Pesquisa
36.47%
Broadband technologies have view great growth over the past decade. But, the main part of this development and growth has been in the core networks, and the capacity of the access network to delivery broadband services remains as a challenge ("last mile problem"). The access network remains a bottleneck in terms of the bandwidth and service quality it affords the end user. By other side, the access network is much more spread geographically and covers larger areas. Then, this part of the network is usually the most expensive component in terms of capital investment and OAM cost. Some studies reefer that this networks required 70% of the total investment. Several access technologies can be used in this part of the network, which can be used to resolve the bandwidth bottleneck and the investment problem: xDSL, HFC, FTTx, FWA, WiMAX, PLC, Satellite, etc. This paper presents a methodology and a tool that compare and evaluate broadband access technologies. The paper presents a techno-economic analysis of eight broadband technologies for access networks: digital subscriber line (DSL), hybrid fiber coax (HFC), power line communications (PLC), fiber to the home (FTTH), fiber to the curb (FTTC), fiber to the cabinet (FTTCab)...

Perspectivas de solução tecno econômico para projetos de rede em banda larga; Perspectives of technical and economical solutions for broadband networking project

Odair dos Santos Mesquita
Fonte: Biblioteca Digital da Unicamp Publicador: Biblioteca Digital da Unicamp
Tipo: Dissertação de Mestrado Formato: application/pdf
Publicado em 19/12/2013 Português
Relevância na Pesquisa
46.41%
Nos últimos anos houve uma evolução das redes de telecomunicações no Brasil. A implantação de redes de fibra óptica tornou-se uma realidade dos centros urbanos bem como nas áreas rurais. Com a expansão dessas redes observa-se o surgimento e a necessidade de normatização das redes ópticas passivas. Entre essas redes passivas destaca-se a EPON (Ethernet Passive Optical Network) e a GPON (Gigabit-Capable Passive Optical Network). Com a expansão de redes de banda larga e de novos serviços ligados a ela, torna-se necessário a realização de estudos detalhados sobre a viabilidade técnica econômica e de aplicabilidade dessas redes. É por isso que desenvolvemos nesse trabalho um modelamento econômico financeiro sobre essas novas tecnologias. Esse modelamento permite escolher a tecnologia economicamente mais viável na implantação de projetos envolvendo as tecnologias GPON e/ou EPON. Esse projeto é baseado em um estudo de caso para um município do interior de São Paulo, Brasil. Durante o estudo realizamos um planejamento técnico econômico detalhado visando uma eventual implantação de uma dessas redes. Foi feita uma apresentação completa dessas tecnologias baseada no estudo de caso. Foi discutida a possibilidade de implantar esse projeto na cidade escolhida do interior de São Paulo ou em qualquer outra cidade brasileira.; In recent years there has been an evolution of telecommunications networks in Brazil. The implementation of fiber-optic networks has become a reality of urban centers and rural areas. With the expansion of these networks...

Aplicabilidade de Sistemas de Videoconferência sobre a Internet de Banda Larga para apoio ao Sistema bimodal de Ensino; The Applicability of Desktop Videoconferencing Systems over Broadband Networks to Support the b-learning Education System

Roth, Rogério
Fonte: Universidade de Aveiro Publicador: Universidade de Aveiro
Tipo: Relatório
Português
Relevância na Pesquisa
66.3%
Esta pesquisa se propôs a investigar o estado actual da tecnologia de videoconferência baseada em computador; avaliou o potencial efectivo desta tecnologia para auxiliar na educação à distância no sistema bimodal (parte presencial e parte à distância) e buscou elementos para subsidiar a especificação de requisitos de comunicação de dados para apoiar aplicações que envolvam principalmente a utilização de áudio e vídeo em tempo real, sobre redes de banda larga.; This research investigated the current state of desktop videoconferencing technology; to evaluate the effective potential of this technology to aid in the distance education in the b-learning system (blended) and to seek elements to subsidize the specification of data communication s requirements to support applications that mainly involve real time audio and video utilization, over broadband networks.

Convergence in Information and Communication Technology : Strategic and Regulatory Considerations

Singh, Rajendra; Raja, Siddhartha
Fonte: World Bank Publicador: World Bank
Português
Relevância na Pesquisa
46.61%
This book is a compilation of two recently completed works on the convergence of information and communication technology (ICT) (Singh and Raja 2008, 2009). Since then, convergence, the eroding of boundaries among previously separate ICT services, networks, and business practices, has accelerated and deepened. At the time these reports were written, convergence was already a reality and was picking up pace in low-income countries, as in the rest of the world. Now, as this introduction summarizes, broadband networks are reaching deeper into previously unserved areas. The growing number of people connected to broadband networks are consuming, sharing, and creating new multimedia content and applications. And they are doing this on handheld and portable devices that are less costly and do more than before. All sorts of users, governments, businesses, individuals, and ICT firms, are looking to cut costs while capturing greater value. Taken together, these trends indicate that convergence is set to accelerate even through the ongoing global economic downturn. Countries that enable convergence through appropriate policy and regulatory responses will realize significant benefits in terms of expanded access...

Broadband for Africa : Developing Backbone Communications Networks

Williams, Mark D. J.
Fonte: World Bank Publicador: World Bank
Português
Relevância na Pesquisa
36.6%
Many countries in Sub-Saharan Africa see information and communication technology (ICT) as a necessary foundation for long-term economic development. While the region has been very successful in increasing access to basic voice communications, there has been no comparable improvement in broadband connectivity. In fact, the broadband access gap between Sub-Saharan Africa and the rest of the world is getting wider just as the gap in basic voice communications is getting smaller. Increasing access to broadband connectivity is therefore emerging as a high priority for policy makers across the continent. This book begins with a brief review of the ICT market and considers the extent of demand for broadband and the ICT services that high-capacity backbone networks make possible. This is followed by a review of the existing coverage of backbone networks in the region, a discussion of how this compares with other parts of the world, and an analysis of the possible explanations for the current pattern of network development. Finally...

Building Broadband : Strategies and Policies for the Developing World

Kim, Yongsoo; Kelly, Tim; Raja, Siddhartha
Fonte: World Bank Publicador: World Bank
Português
Relevância na Pesquisa
46.65%
This book suggests an ecosystem approach to broadband policy that could help in the design of strategies, policies, and programs that support network expansion, have the potential to transform economies, improve the quality and range of services, enable application development, and broaden adoption among users. To identify emerging best practices to nurture this ecosystem, this volume analyzes the Republic of Korea and other leading broadband markets. It identifies three building blocks to support the growth of the broadband ecosystem: defining visionary but flexible strategies, using competition to promote market growth, and facilitating demand. An important but often neglected building block is demand facilitation. This includes raising awareness about the benefits of broadband and improving affordability and accessibility for the largest number of users. Successful countries have often focused on creating a suite of useful applications that increase the relevance of broadband to the widest base of users. Programs to mainstream information and communication technology (ICT) use in education...

2009 Information and Communications for Development : Extending Reach and Increasing Impact

World Bank
Fonte: World Bank Publicador: World Bank
Português
Relevância na Pesquisa
46.47%
The information and communication technology (ICT) is transforming interactions between people, governments, and firms worldwide. In developing countries, farmers receive updated crop prices and public health officials monitor medical inventories by text messages. Women are empowered to make decisions and access new opportunities through online information. Entrepreneurs obtain business licenses in a fraction of the standard time by applying for them through municipal government web sites. And in an increasingly integrated global economy, ICT enables people to access and share knowledge and services around the world. The first report, Information and Communications for Development (IC4D) 2006: global trends and policies, analyzed lessons on developing access to ICT, examined the roles of the public and private sectors in this process, and identified the benefits and challenges of adopting and expanding ICT use in businesses. This second report, IC4D 2009: extending reach and increasing impact, takes a close look at mobile and broadband connectivity. It analyzes the development impact of high-speed Internet access in developing countries and provides policy options for rolling out broadband networks and addressing the opportunities and challenges of convergence between telecommunications...

Broadband Wireless Access in Egypt

World Bank
Fonte: Washington, DC Publicador: Washington, DC
Português
Relevância na Pesquisa
36.63%
This paper discusses current and future developments in wireless technology and infastructure in Egypt. One of the important regulatory decisions made in Egypt is that policy related to broadband wireless will be technology neutral. Consequently, the regulator cannot decide about which operators should use specific technologies. This approach is beneficial for the overall development of the market and deployment of networks because: It allows operators and service providers to decide on which technology or mix of technologies is best for given service and market requirements, budget outlays, and deployment scenarios. Such an approach promotes technical and economic efficiency since each service providerwill attempt to maximize revenues and their subscriber base. The flexibility allows the regulator to ensure that the market can deploy the latest technology with the least regulatory overhead. Allowing only one technology into the market place will restrict the range of choices available to consumers.

Socio-Economic Assessment of Broadband Development in Egypt

World Bank
Fonte: Washington, DC Publicador: Washington, DC
Português
Relevância na Pesquisa
56.49%
The Government of Egypt has recognized broadband as being of strategic importance to the country´s economic and social development and it is developing a new strategy to develop access and use of broadband networks and services. As a specific target of this strategy, the government seeks to increase broadband penetration to 20 connections per 100 inhabitants by 2013. This report is the result of the second part of the existing reimbursable technical assistance on communications by which the World Bank has been providing assistance to the government of Egypt in the development of this broadband strategy. The objective of this particular assignment is to support the policy making process to develop broadband services and infrastructure throughout Egypt and achieve substantial economic impact in the economy including specific intermediary sectors. This assignment builds of the outcomes of the previously delivered study (strategic options for broadband development, 2010) and it uses both qualitative and quantitative approaches to provide specific advisory outputs.

Broadband Networks in the Middle East and North Africa : Accelerating High-Speed Internet Access

Gelvanovska, Natalija; Rogy, Michel; Rossotto, Carlo Maria
Fonte: Washington, DC: World Bank Publicador: Washington, DC: World Bank
Português
Relevância na Pesquisa
46.46%
Just as the steam engine was the driving force behind the Industrial Revolution, broadband Internet is today seen as critical to the transition to knowledge-intensive economies across the world. As a general purpose technology, broadband Internet is considered as a fundamental driver of economic growth and social development, releasing the innovative potential and energy of previously disenfranchised members of the population. Many of the countries in the Middle East and North Africa region (MENA) now recognize that broadband Internet is crucial to their efforts to reduce poverty and create job opportunities, especially for their young populations and for women. The report re-emphasizes the important contribution that broadband Internet can make and assesses the status of existing infrastructure in at least 18 MENA countries. While there is significant potential across the region, however, the take-up of broadband Internet has been slow, and the price of broadband service is high in many countries. In large part, this stems from market structures that, too often, reflect the past when telecommunications were treated as a monopoly utility service. The report finds that there are gaps in infrastructure regionally with no connectivity between neighboring countries in some cases. Similarly...

Broadband in Russia

Rossotto, Carlo Maria; Gelvanovska, Natalija; Hohlov, Yuri; Maciule, Vaiva; Shaposhnik, Sergei
Fonte: World Bank, Washington, DC Publicador: World Bank, Washington, DC
Tipo: Trabalho em Andamento
Português
Relevância na Pesquisa
46.51%
It is widely recognized that broadband is of fundamental importance to the social and economic development of a nation. The focus of the paper is on infrastructure-related actions; measures to stimulate demand for broadband are, therefore, only marginally addressed. This paper aims to provide a platform for debate with the Russian counterparts in the sector, and to discuss the measures needed to develop broadband in support of actions aimed at economic growth. This paper examines the broadband market in Russia and preconditions for its sustainable development. It begins by presenting arguments demonstrating the importance of broadband to the overall economic development of Russia, including from the perspective of diversification of the economy and new job creation. The paper benchmarks Russia s broadband performance with Organization of Economic Cooperation and Development (OECD) comparators, as well as with other nations leading the way in broadband diffusion. The paper takes stock of the existing broadband market structure in Russia and its main players as they stand today...

Broadband Strategies Handbook

Kelly, Tim; Rossotto, Carlo Maria
Fonte: Washington, DC: World Bank Publicador: Washington, DC: World Bank
Tipo: Publications & Research; Publications & Research :: Publication
Português
Relevância na Pesquisa
46.64%
The handbook consists of seven chapters and two appendixes that look at how broadband is defined, why it is important, and how its development can be encouraged. Throughout the handbook, broadband is viewed as an ecosystem consisting of supply and demand components, both of which are equally important if the expansion of broadband networks and services is to be successful. In addressing the challenges and opportunities to which broadband gives rise, the handbook discusses the policies and strategies that government officials and others should consider when developing broadband plans, including what legal and regulatory issues to address, what broadband technologies to choose, how to facilitate universal broadband access, and how to generate demand for broadband services and applications. Chapter one, 'building broadband,' introduces the concepts of broadband by defining the term 'broadband' more conventionally (that is, speed or functionality) as well as explaining how this handbook seeks to define the term as broadband comes to be seen as an enabling platform. Chapter two...

Telecommunications Regulation Handbook : Tenth Anniversary Edition

Blackman, Colin; Srivastava, Lara
Fonte: World Bank and the International Telecommunication Union, Washington, DC Publicador: World Bank and the International Telecommunication Union, Washington, DC
Tipo: Publications & Research :: Working Paper; Publications & Research
Português
Relevância na Pesquisa
46.5%
Communications are an essential means for reaching the, bottom of the Pyramid, and enabling individuals to reduce poverty and improve the quality of their lives. We currently live in a world in which more Africans have access to a mobile phone than to any other utility or infrastructure service. This widespread technological dissemination creates new opportunities across all segments of society, but also presents new challenges requiring adaptable strategies. Today's communications landscape is vastly different from the environment in which we developed the first telecommunications regulation handbook ten years ago. Competitive and open communications markets have created opportunities in countries that previously lagged behind. Competitively priced and technologically varied service offerings have allowed businesses to compete and thrive globally. However, there are still serious market gaps (such as providing widespread high speed broadband services at affordable prices and connectivity to remote areas), that, when coupled with evolving and converging technologies, pose challenges to policymakers and regulators. This new edition of the telecommunications regulation handbook captures the new market and regulatory strategies to optimize investment in broadband networks and Information and Communication Technology...

Evaluation of Former Yugoslav Republic of Macedonia's Wi-Fi Kiosk Program

Gelvanovska, Natalija; Viatchaninova, Ievgeniia; Saliu, Artan
Fonte: World Bank, Washington, DC Publicador: World Bank, Washington, DC
Tipo: Working Paper; Publications & Research; Publications & Research :: Working Paper
Português
Relevância na Pesquisa
36.52%
This white paper has been prepared by World Bank s Transport and Information and Communication Technologies (ICT) Global Practice at the request of the MIOA . Delivery of the White Paper is part of a wider package of technical assistance by the World Bank to the Government of FYR Macedonia. The paper starts off by giving an overview of the state of telecom development in rural FYR Macedonia from the standpoint of affordability and availability of the commercial broadband Internet access services for the less advantaged groups of the population. The next section describes the Wi-Fi Kiosk Project outlining its scope, aim, and implementation process while bringing forward publics experiences with respect to the Wi-Fi kiosk use. This section also examines technical parameters related to the Internet usage and demonstrates the problematic of the kiosk maintenance in the remote and rural areas. Section five references specific policy and regulatory measures designed by different government stakeholders with a goal to analyse the approach which has been chosen to ensure availability of the fixed and (or) mobile broadband Internet in the rural areas of the country. The white paper concludes with a set of observations and recommendations aiming to address the sustainability of the results achieved by the Wi-Fi Kiosk Project and to offer next steps to increase rural connectivity in FYR Macedonia.

Mudança técnica e políticas públicas : exepriências internacionais na difusão da banda larga e o caso brasileiro; Technical change and public policies : international experiences in broadband diffusion and the Brazilian case

Cristiane Vianna Rauen
Fonte: Biblioteca Digital da Unicamp Publicador: Biblioteca Digital da Unicamp
Tipo: Tese de Doutorado Formato: application/pdf
Publicado em 22/02/2013 Português
Relevância na Pesquisa
46.47%
A presente tese analisa o processo de mudança na agenda de políticas de difusão de serviços de telecom face ao processo de mudança técnica que deu origem às redes de banda larga. Inserida no paradigma tecnoeconômico da atualidade, o paradigma das TICs, o surgimento das redes de banda larga acarretou em uma série de impactos na dinâmica socioeconômica dos dias atuais - como alteração nas formas de comunicação e de acesso à informação da sociedade, alteração na estrutura organizacional do setor de telecom e dinamização macroeconômica de forma geral -, o que levou a um processo de anomalias no paradigma político anterior aplicável a esse setor, em particular, com relação ao escopo e às formas de difusão dos serviços. Diante disso, as experiências internacionais passaram a incluí-la como item das agendas de difusão de serviços em substituição aos tradicionais serviços de telefonia fixa. Observou-se que a maior parte das experiências internacionais não fez isso com base na introdução da banda larga nas agendas de regulação para universalização, mas sim, incluindo-a nas agendas de regulação para competição, em especial, entre - plataformas, e em programas públicos voltados à expansão desse serviço...

Radio Location using Pattern Matching Techniques in Fixed Wireless Communication Networks

Qiu, L; Kennedy, Rodney
Fonte: Institute of Electrical and Electronics Engineers (IEEE Inc) Publicador: Institute of Electrical and Electronics Engineers (IEEE Inc)
Tipo: Conference paper
Português
Relevância na Pesquisa
46.01%
In this paper we propose a practical radio location scheme for fixed wireless networks, relying on only one base station. We exploit the already available channel impulse response (CIR) of fixed wireless terminals as a location fingerprint in wireless loc

Generalized Broadband Beamforming Using a Modal Subspace Decomposition

Williams, Mick; Abhayapala, Thushara; Kennedy, Rodney
Fonte: Hindawi Publishing Corporation Publicador: Hindawi Publishing Corporation
Tipo: Artigo de Revista Científica
Português
Relevância na Pesquisa
46.18%
We propose a new broadband beamformer design technique which produces an optimal receiver beam pattern for any set of field measurements in space and time. The modal subspace decomposition(MSD) technique is based on projecting a desired pattern into the s

Long Tail Behavior of Queue Lengths in Broadband Networks: Tsallis Entropy Framework

Karmeshu; Sharma, Shachi
Fonte: Universidade Cornell Publicador: Universidade Cornell
Tipo: Artigo de Revista Científica
Português
Relevância na Pesquisa
46.14%
A maximum entropy framework based on Tsallis entropy is proposed to depict long tail behavior of queue lengths in broadband networks. Queue length expression as measured in terms of number of packets involves Hurwitz-zeta function. When the entropy parameter q in Tsallis entropy is less than unity, the distribution of packets yields power law behavior. In the limit q tending to unity, Tsallis entropy expression reduces to one due to Shannon and well-known results of M/M/1 queuing system are recovered. Relationship between Tsallis entropy parameter q and Hurst parameter H (measure of self-similarity) is postulated. A numerical procedure based on Newton-Raphson method is outlined to compute Lagrange's parameter b. Various relationships between traffic intensity r and Lagrange's parameter b are examined using data generated from mean number of packets from storage model due to Norros. It is found that best fit corresponds to r being a linear combination of decaying exponential and power exponent in b for different values of entropy parameter q. Explicit expression for the probability that queue size exceeds a certain value is derived and it is established that it asymptotically follows power law for q less than one. The system utilization shows an interesting behavior when the parameter r is varied. It attains lower values than that of M/M/1 system for smaller values of r whereas situation reverses for higher values of r.

Imposing Pattern nulls on broadband array responses

Kootsookos, Peter; Ward, Darren B; Williamson, Robert
Fonte: Acoustical Society of America Publicador: Acoustical Society of America
Tipo: Artigo de Revista Científica
Português
Relevância na Pesquisa
46.26%
This paper considers the problem of altering a quiescent design for an array of omni-directional sensors so that the altered design rejects a far- field broadband signal from a given direction. This problem occurs where microphone arrays are to be used to acquire speech signals for telecommunication and interferring signals must be rejected. Three main results are presented in this paper. First, conditions for imposing an exact broadband null upon any given quiescent array response are derived. Second, an analysis of the sensitivity of exact nulling array responses to sensor position error is presented. Third, frequency domain formulations for broadband nulls are obtained and it is shown that these are less restrictive than the exact null conditions which are imposed in the time domain. A Lagrange multiplier approach is used to impose the null conditions upon a quiescent array response to minimize the square error between the quiescent and nulled responses. A design example is given.

National Broadband Planning and Market Liberalism: Regulatory Reforms for Citizenship?

Dwyer,Timothy
Fonte: OberCom Publicador: OberCom
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/01/2011 Português
Relevância na Pesquisa
46.5%
Planning for the systematic upgrading to ‘superfast’ broadband networks has emerged as a key communications infrastructure in many countries throughout the developed world. These governance processes combine centrally directed state measures with laissez-faire market or civil society organisation components. In some cases we are witnessing the kinds of arrangements typically encountered when governments pursue capital works initiatives in collaboration with privately controlled corporations. In this sense broadband networks can be another instance of ‘public-private’ infrastructure partnerships, just as governments have constructed joint arrangements for the ubiquitous supply of telecommunications, transport, electricity, gas and water. Yet media and communications systems are simultaneously cultural industry sites that often represent a profound culture-economy disconnect. In such systems, because they culturally distribute ‘public goods’ that work to shape peoples’ deliberation and participation in society, there is the tendency for conflict with the defining features of market liberalism (Keane, 1991). This dual life of media and communications systems, as both economic input to key infrastructure and foundational to political democracy is frequently highlighted (McChesney...