Architectural Description Of The Qos Provision In Generic Processing And Communication Environments
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Architectural Description Of The Qos Provision In Generic Processing And Communication Environments
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Author :
language : pt-BR
Publisher:
Release Date : 2003
Architectural Description Of The Qos Provision In Generic Processing And Communication Environments written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2003 with categories.
O aumento da demanda por plataformas com suporte a aplicações multimídia torna evidente a importância de mecanismos que ofereçam garantias de Qualidade de Serviço (QoS), uma vez que cada mídia exige requisitos própriosde processamento e comunicação. O modelo SCM (Service-Composition Model) fornece abstrações adequadas para a representação e programação de aspectos de QoS e comunicação em grupo em serviços de comunicação. Seguindo sua terminologia, a provisão de QoS pode ser vista como um provedor de serviços onde atuam meta serviços de negociação e sintonização de QoS. A negociação de QoS define mecanismos responsáveis pela admissão de novos fluxos do usuário, enquanto a sintonização de QoS age, durante o fornecimento do serviço, na manutenção do nível de serviço negociado. Tais meta serviços já foram previamente descritos por meio de frameworks em UML. O presente trabalhofocaliza a descrição arquitetural desses meta serviços, utilizando a linguagem de descrição de arquitetura (ADL) Wright, permitindo o emprego de suas ferramentas de análise e verificação formal para inferir propriedades. Para facilitar o emprego dessa abordagem através do uso de uma notação mais próxima do domínio do problema, uma linguagem de domínio específico (DSL) chamada LindaQoS é proposta especificamente para definir hierarquias de subsistemas denegociação e sintonização. O trabalho é complementado por um compilador que traduz especificações LindaQoS para descrições arquiteturais (atualmente, usando Wright) e para linguagens de programação (futuramente em JAVA).
A Framework For Qos Provisioning In Wireless Mobile Networks
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Author :
language : pt-BR
Publisher:
Release Date : 2002
A Framework For Qos Provisioning In Wireless Mobile Networks written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2002 with categories.
Nas últimas décadas, tem-se observado um crescente interesse nas tecnologias relacionadas a ambientes de comunicação móvel sem fio. Em grande parte, esse interesse vem acompanhando o crescimento do mercado de telecomunicações, mais especificamente dos sistemas de telefonia móvel celular. Os usuários vêm absorvendo rapidamente essas tecnologias, originando novas necessidades, como a utilização de serviços de dados multimídia, que exige garantias de qualidade. Nessecontexto, um dos desafios encontrados é conseguir a utilização eficiente do limitado espectro de freqüências disponível, fornecendo serviços com qualidade para osusuários. Esta dissertação propõe uma arquitetura para provisão de qualidade de serviço -QoS- fim-a-fim em redes móveis sem fio, levando em consideração características inerentes a esses ambientes. Para alcançar esse objetivo, são propostas modificações aos frameworks para provisão de QoS em ambientes genéricos de processamento e comunicação, visando atender às necessidades trazidas pelas redes móveis, gerando uma arquitetura adaptável para fornecer QoS em ambientes que ofereçam suporte à mobilidade. Uma instanciação dos frameworks para provisão de QoS em redes móveis sem fio é descrita através de um cenário de mobilidade, no qual é simulada uma rede infraestruturadade serviços integrados funcionando sobre o IP Móvel, de modo a validar a peoposta.
Design And Evaluation Of A Qos Sensitive Communication Subsystem Architecture
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Author : University of Michigan. Dept. of Electrical Engineering and Computer Science. Computer Science and Engineering Division
language : en
Publisher:
Release Date : 1996
Design And Evaluation Of A Qos Sensitive Communication Subsystem Architecture written by University of Michigan. Dept. of Electrical Engineering and Computer Science. Computer Science and Engineering Division and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1996 with Computer network architecture categories.
Abstract: "There are a growing number of real-time applications (e.g., real-time controls, and audio/video conferencing) that require certain quality of service (QoS) guarantees from the underlying communication subsystem. The communication subsystem (host as well as network) must support real-time communication services that can be used to provide the required QoS of these applications, while providing reasonably good performance for best-effort traffic. In this paper we present and evaluate a QoS-sensitive communication subsystem architecture for end hosts that provides real-time communication support for generic network hardware. This architecture provides various services for managing communication resources for guaranteed-QoS (real-time) connections, such as admission control, traffic enforcement, buffer management, and CPU & link scheduling. The design of the architecture is based on three key goals: maintenance of QoS-guarantees on a per-connection basis, overload protection between established connections, and fairness in delivered performance to best-effort traffic. Using this architecture, we implement real-time channels, a paradigm for real-time communication services in packet-switched networks. The proposed architecture features a process- per-channel model for protocol processing that associates a channel handler with each established channel. The model employed for handler execution is one of 'cooperative' preemption, where an executing handler yields the CPU to a waiting higher-priority handler at well-defined preemption points. The architecture provides several configurable policies for CPU scheduling and overload protection. We evaluate the implementation to demonstrate that this architecture maintains QoS guarantees while adhering to the stated design goals. The evaluation also demonstrates convincingly the need for specific features and policies provided in the architecture."
Intelligent Quality Of Service Technologies And Network Management Models For Enhancing Communication
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Author : Bhattarakosol, Pattarasinee
language : en
Publisher: IGI Global
Release Date : 2010-04-30
Intelligent Quality Of Service Technologies And Network Management Models For Enhancing Communication written by Bhattarakosol, Pattarasinee and has been published by IGI Global this book supported file pdf, txt, epub, kindle and other format this book has been release on 2010-04-30 with Medical categories.
"This book "quality of service" in organizations, offering fundamental knowledge on the subject, describing the significance of network management and the integration of knowledge to demonstrate how network management is related to QoS in real applications"--Provided by publisher.
Communications Computation Control And Signal Processing
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Author : Arogyaswami Paulraj
language : en
Publisher: Springer Science & Business Media
Release Date : 2012-12-06
Communications Computation Control And Signal Processing written by Arogyaswami Paulraj and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-12-06 with Technology & Engineering categories.
A. Paulraj*, V. Roychowdhury**, and C. Schaper* * Dept. of Electrical Engineering, Stanford University ** Dept. of Electrical Engineering, UCLA Innumerable conferences are held around the world on the subjects of commu nications, computation, control and signal processing, and on their numerous subdisciplines. Therefore one might not envision a coherent conference encom passing all these areas. However, such an event did take place June 22-26, 1995, at an international symposium held at Stanford University to celebrate Professor Thomas Kailath's sixtieth birthday and to honor the notable con tributions made by him and his students and associates. The depth of these contributions was evident from the participation of so many leading figures in each of these fields. Over the five days of the meeting, there were about 200 at tendees, from eighteen countries, more than twenty government and industrial organizations, and various engineering, mathematics and statistics faculties at nearly 50 different academic institutions. They came not only to celebrate but also to learn and to ponder the threads and the connections that Professor Kailath has discovered and woven among so many apparently disparate areas. The organizers received many comments about the richness of the occasion. A distinguished academic wrote of the conference being "the single most rewarding professional event of my life. " The program is summarized in Table 1. 1; a letter of reflections by Dr. C. Rohrs appears a little later.
Qos Over Heterogeneous Networks
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Author : Mario Marchese
language : en
Publisher: John Wiley & Sons
Release Date : 2007-04-30
Qos Over Heterogeneous Networks written by Mario Marchese and has been published by John Wiley & Sons this book supported file pdf, txt, epub, kindle and other format this book has been release on 2007-04-30 with Technology & Engineering categories.
The importance of quality of service (QoS) has risen with the recent evolution of telecommunication networks, which are characterised by a great heterogeneity. While many applications require a specific level of assurance from the network; communication networks are characterized by different service providers, transmission means and implementer solutions such as asynchronous transfer mode (ATM), Internet protocol version 4 (IPv4), IPv6 and MPLS. Providing comprehensive coverage of QoS issues within heterogeneous network environments, “QoS Over Heterogeneous Networks” looks to find solutions to questions such as does QoS fit within heterogeneous networks and what is the impact on performance if information traverses different network portions that implement specific QoS schemes. Includes: A series of algorithms and protocols to help solve potential QoS problems. State of the art case studies and operative examples to illustrate points made. Information on QoS mapping in terms of service-level specification (SLS) and an in-depth discussion of related issues Chapters end-to-end (E2E) QoS, QoS architecture, QoS over heterogeneous networks and QoS internetworking and mapping. An ideal book for graduate students, researchers and lecturers. System designers, developers and engineers will also find “QoS Over Heterogeneous Networks” a valuable reference.
Networking Icn 2001
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Author : Pascal Lorenz
language : en
Publisher: Springer Science & Business Media
Release Date : 2001-06-27
Networking Icn 2001 written by Pascal Lorenz and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2001-06-27 with Business & Economics categories.
This book constitutes, together with its compagnion LNCS 2093,the refereed proceedings of the First International Conference of Networking, ICN 2001, held in Colmar, France, June 2001. The 168 papers presentedn were carefully reviewed and selected from around 300 submissions. The proceedings offers topical sections on third and fourth generation, Internet, traffic control, mobile and wireless IP, differentiated services, GPRS and cellular networks, WDM and optical networks, differentiated and integrated services, wirless ATM multicast, real-time traffic, wireless, routing, traffic modeling and simulation, user applications, mobility management, TCP analysis, QoS, ad hoc networks, security, MPLS, switches, COBRA, mobile agents, ATM networks, voice over IP, active networks, video communiccations, and modelization.
The Industrial Information Technology Handbook
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Author : Richard Zurawski
language : en
Publisher: CRC Press
Release Date : 2018-10-03
The Industrial Information Technology Handbook written by Richard Zurawski and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018-10-03 with Computers categories.
The Industrial Information Technology Handbook focuses on existing and emerging industrial applications of IT, and on evolving trends that are driven by the needs of companies and by industry-led consortia and organizations. Emphasizing fast growing areas that have major impacts on industrial automation and enterprise integration, the Handbook covers topics such as industrial communication technology, sensors, and embedded systems. The book is organized into two parts. Part 1 presents material covering new and quickly evolving aspects of IT. Part 2 introduces cutting-edge areas of industrial IT. The Handbook presents material in the form of tutorials, surveys, and technology overviews, combining fundamentals and advanced issues, with articles grouped into sections for a cohesive and comprehensive presentation. The text contains 112 contributed reports by industry experts from government, companies at the forefront of development, and some of the most renowned academic and research institutions worldwide. Several of the reports on recent developments, actual deployments, and trends cover subject matter presented to the public for the first time.
Delta 4 A Generic Architecture For Dependable Distributed Computing
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Author : David Powell
language : en
Publisher: Springer Science & Business Media
Release Date : 2012-12-06
Delta 4 A Generic Architecture For Dependable Distributed Computing written by David Powell and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-12-06 with Computers categories.
Delta-4 is a 5-nation, 13-partner project that has been investigating the achievement of dependability in open distributed systems, including real-time systems. This book describes the design and validation of the distributed fault-tolerant architecture developed within this project. The key features of the Delta-4 architecture are: (a) a distributed object-oriented application support environment; (b) built-in support for user-transparent fault tolerance; (c) use of multicast or group communication protocols; and (d) use of standard off the-shelf processors and standard local area network technology with minimum specialized hardware. The book is organized as follows: The first 3 chapters give an overview of the architecture's objectives and of the architecture itself, and compare the proposed solutions with other approaches. Chapters 4 to 12 give a more detailed insight into the Delta-4 architectural concepts. Chapters 4 and 5 are devoted to providing a firm set of general concepts and terminology regarding dependable and real-time computing. Chapter 6 is centred on fault-tolerance techniques based on distribution. The description of the architecture itself commences with a description of the Delta-4 application support environment (Deltase) in chapter 7. Two variants of the architecture - the Delta-4 Open System Architecture (OSA) and the Delta-4 Extra Performance Architecture (XPA) - are described respectively in chapters 8 and 9. Both variants of the architecture have a common underlying basis for dependable multicasting, i. e.
Intelligence In Networks
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Author : Thongchai Yongchareon
language : en
Publisher: Springer
Release Date : 2012-12-06
Intelligence In Networks written by Thongchai Yongchareon and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-12-06 with Computers categories.
Intelligence in Networks is a concept, the meaning of which is highly related to the time-period when it is used. In the 1960s, 1970s and 1980s, it was mainly related to the teleservice repertoire `an sich'. In the 1990s, it is more related to efficient flexibility in the introduction of new teleservices and teleservice repertoire. This state-of-the-art text sets out to identify and study issues related to solutions for increasing intelligence in networks. As examples, intelligence networks (IN), telecommunication information networking architecture (TINA) and mobile agents and active networks are different solutions for improving the grade of network intelligence. The areas under discussion include research and development within various closely related fields such as: Teleservices, service architecture and service creation; Middleware and specification languages; Mobile agents, active networks, plug-and-play issues; and Quality of service and performance.£/LIST£ Intelligence in Networks contains the proceedings of SMARTNET'99, the fifth in a series of conferences on intelligence in networks sponsored by the International Federation for Information Processing (IFIP), at the Asian Institute of Technology, Pathumthani, Thailand in November 1999.