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Orientador: Eurípedes Guilherme de Oliveira Nóbrega / Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Mecânica / Made available in DSpace on 2018-08-18T19:29:48Z (GMT). No. of bitstreams: 1 Manzano_RonaldoSergioNovaes_M.pdf: 3919621 bytes, checksum: 3ecae7cafc0760b1cbe75718579f45ef (MD5) Previous issue date: 2011 / Resumo: O objetivo deste trabalho é criar uma metodologia que monitore e detecte em tempo real as falhas, seja de processo seja de instrumentos, em uma coluna de destilação. Para tanto, foi utilizado um sistema de inferência nebulosa com um sistema de análise de confiabilidade de instrumentos a partir dos diagnósticos disponibilizados na rede industrial Fieldbus Foundation®. O resultado é uma simples, prática e ao mesmo tempo poderosa ferramenta que permite aos operadores analisarem e identificarem falhas e todas as suas causas prováveis, permitindo-lhes assim tomar ações preventivas e/ou corretivas mais rapidamente e com maior assertividade. Essa metodologia foi desenvolvida em VBA Excel® com interface amigável e gráfica. Para cada falha detectada é detalhada sua causa raiz (pode ser mais de uma), ação a ser tomada e é dada uma indicação percentual de intensidade de falha, facilitando a priorização das ações de manutenção / Abstract: The objective is to create a methodology for to monitor and to detect faults in real time, as for process as for instruments in a distillation column. For this, we used a fuzzy inference system with another instruments reliability analysis system from the diagnostics available in the Fieldbus Foundation® industrial network. The result is a simple, practical and yet powerful tool that allows the operators to analyze and to identify faults and their possible causes, thus allowing them to take preventive and / or corrective actions more quickly and with greater assertiveness. This methodology was developed in Excel® VBA with friendly interface and graphics. For each fault detected is detailed their root-cause (may be more than one is possible), the actions to take and so, it's given a percentage indication of failure intensity, facilitating the prioritization for maintenance's actions / Mestrado / Mecanica dos Sólidos e Projeto Mecanico / Mestre em Engenharia Mecânica

International Telemetering Conference Proceedings / October 25-28, 1993 / Riviera Hotel and Convention Center, Las Vegas, Nevada / As technology progresses we are faced with ever increasing volumes and rates of raw and processed telemetry data along with digitized high resolution video and the less demanding areas of video conferencing, voice communications and general LAN-based data communications. The distribution of all this data has traditionally been accomplished by solutions designed to each particular data type. With the advent of Asynchronous Transfer Modes or ATM, a single technology now exists for providing an integrated solution to distributing these diverse data types. This allows an integrated set of switches, transmission equipment and fiber optics to provide multi-session connection speeds of 622 Megabits per second. ATM allows for the integration of many of the most widely used and emerging low, medium and high speed communications standards. These include SONET, FDDI, Broadband ISDN, Cell Relay, DS-3, Token Ring and Ethernet LANs. However, ATM is also very well suited to handle unique data formats and speeds, as is often the case with telemetry data. Additionally, ATM is the only data communications technology in recent times to be embraced by both the computer and telecommunications industries. Thus, ATM is a single solution for connectivity within a test center, across a test range, or between ranges. ATM can be implemented in an evolutionary manner as the needs develop. This means the rate of capital investment can be gradual and older technologies can be replaced slowly as they become the communications bottlenecks. However, success of this evolution requires some planning now. This paper provides an overview of ATM, its application to test ranges and telemetry distribution. A road map is laid out which can guide the evolutionary changeover from today's technologies to a full ATM communications infrastructure. Special applications such as the support of high performance multimedia workstations are presented.

Στην παρούσα διπλωματική εργασία μελετάται έλεγχος της λειτουργίας ενός πλήθους διαφορετικών τεχνολογιών δικτύου, όπως το Ψηφιακό Δίκτυο Ενοποιημένων Υπηρεσιών (Integrated Services Digital Network, ISDN), ο ψηφιακός βρόχος συνδρομητή (Digital Subscriber Loop), οι τεχνολογίες SHDSL,VDSL κ.α. Αφότου έγινε μια εκτενής περιγραφή των περισσότερων τύπων δικτύων και διεξοδική μελέτη των λειτουργιών τους, προσδιορίστηκαν οι τεχνολογίες δικτύου που είναι εφικτό να μελετηθούν στα πλαίσια ενός εργαστηριακού μαθήματος. Για την επίτευξη του στόχου αυτού δη-μιουργήθηκαν μια σειρά εργαστηριακών ασκήσεων που βοηθούν στην κατανόηση τόσο των συγκεκριμένων τεχνολογιών (και των μεταξύ τους διαφορών) όσο και των πολυάριθμων ελέγχων που είναι δυνατό να διεξαχθούν για την παρακολούθηση και συντήρηση των συγκεκριμένων δικτύων. Εν κατακλείδι η εργασία αποτελεί ένα χρήσιμο εργαλείο για τη μελέτη των πιο σημαντικών τεχνολογιών δικτύου. / This diploma thesis examines the monitoring of the functions, of many network technologies such as the Integrated Services Digital Network (ISDN), the Digital Subscriber Loop (DSL), the SHDSL, VDSL technologies and more. After an extensive reference of the most network types and a comprehensive study of their functions, it has been determined which of those is possible to be examined as a part of lab course. In order for this goal to be achieved, it has been created a set of laboratory exercises that help in the understanding of these network technologies, the differences between them and the multiple tests that can be conducted for the monitoring and maintenance of those networks. In conclusion this diploma thesis is useful tool in the study of the most important network technologies.

Orientador: Ivanil Sebastião Bonatti / Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Eletrica e de Eletrica / Made available in DSpace on 2018-08-05T15:37:17Z (GMT). No. of bitstreams: 1 Marques_MarcelodeOliveira_M.pdf: 450626 bytes, checksum: fa1f72472e4929bcf614ccd0a37ab18b (MD5) Previous issue date: 2005 / Resumo: O dimensionamento de enlace sem fio das redes de telecomunicação com integração de voz e de dados é abordado nesse trabalho. Foram desenvolvidos procedimentos de análise e síntese para os dois modelos de filas considerados: modelos markovianos; e modelos com prioridade, sem e com preempção. Esquemas com ou sem compartilhamento de recursos e com buffer finito e infinito foram considerados. Comparações numéricas foram feitas para os modelos utilizados, bem como, os resultados obtidos no dimensionamento do enlace foram submetidos a condições de sobrecarga do tráfego de voz e de dados de forma a analisar o comportamento dos parâmetros de qualidade de serviço especificados / Abstract: The dimensioning of telecommunications network wireless link, with voice and data integration, is presented in this paper. Analysis and synthesis procedures were developed considering Markovian and priority models (with or without preemption). Schemes with or without resources sharing and finite and infinite buffer were considered. The selected models were numerically compared and the results of the dimensioning were submitted to simulations of traffic overload conditions in order to analyze the quality of service parameters behavior / Mestrado / Telecomunicações e Telemática / Mestre em Engenharia Elétrica

Orientador: Michel Daoud Yacoub / Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Elétrica e de Computação / Made available in DSpace on 2018-08-27T09:49:57Z (GMT). No. of bitstreams: 1 Silveira_LorenoMenezesda_M.pdf: 2626161 bytes, checksum: b80454b10dc90baf554cb0f37c6ba67e (MD5) Previous issue date: 2015 / Resumo: Esta dissertação apresenta uma visão da evolução das redes de telecomunicações objetivando o atendimento dos parâmetros da Qualidade de Serviço de redes IP aos requisitos de qualidade de voz das redes telefônicas de circuitos comutados. Gera também uma série de resultados úteis para planejar a introdução de novas tecnologias e de Redes de Nova Geração (NGN) para serviços de voz. Entre os resultados, introduz uma metodologia de planejamento de rede com base na experiência do autor na área. A aplicação desta metodologia é descrita em um caso de estudo sobre a introdução do serviço de voz através de uma rede IP existente. Analisa parâmetros de qualidade de serviço, requisitos de qualidade de voz e, finalmente, calcula a taxa de transferência de fluxo de dados adicional devido ao tráfego de voz. Os cálculos são baseados em um modelo de dimensionamento implementado em uma planilha do Excel. Apesar de não mostrado neste trabalho, os resultados provaram sua efetividade e consistência com a implantação de uma prestadora específica e com o comportamento subsequente da rede em cidades relevantes, como São Paulo, Rio de Janeiro e Belo Horizontes. A dissertação também apresenta modelos de dimensionamento para o tráfego de sinalização: Sistema de Sinalização Nº 7 (ISUP - Rede Digital de Serviços Integrados e BICC - Portador de Controle de chamada Independent) para uso em redes TDM (Time Division Multiplex), ATM (Asynchronous Transfer Mode) ou NGN, explorando estes modelos de aplicação para o protocolo H.248 com possível extensão a SIP, ambos usados no contexto NGN / Abstract: This dissertation provides an overview of telecommunication networks evolution in the light of compliance of IP networks Quality of Service¿s parameters with Public Switched Telephone Networks (PSTN) voice quality requirements. It also delivers a number of new results useful for planning and designing the introduction of new technologies as well as Next Generation Networks (NGN), to provide voice services. Among the results, it introduces a network planning methodology based on the author's experience in this area. The application of such methodology is depicted in a study case concerning the introduction of the voice service over an existing IP network. It analyzes Quality of Service parameters, voice quality requirements and, finally, it calculates the additional data flow throughput due to the voice traffic. The calculations are based on a dimensioning model implemented in an excel spreadsheet. Although not being shown here, the results have been proved effective and consistent with a specific carrier deployment and subsequent network behavior in relevant cities like São, Paulo, Rio de Janeiro and Belo Horizonte. This work also presents a dimensioning model for signaling traffic: Signalling System Nº 7 (ISUP ¿ Integrated Services Digital Networks and BICC - Bearer Independent Call Control) for use in TDM (Time Division Multiplex), ATM (Asynchronous Transfer Mode) or NGN networks. Furthermore, it exploits the application of the dimensioning model to H.248 protocol, suggesting how to extend it to SIP, both used in the NGN context / Mestrado / Telecomunicações e Telemática / Mestre em Engenharia Elétrica