Download or read book Routage par la disponibilit dans les r seaux ad hoc hybrides written by and published by . This book was released on 2009 with total page 133 pages. Available in PDF, EPUB and Kindle. Book excerpt: Dans les réseaux sans-fil auto-organisés que sont les réseaux ad-hoc, les nœuds (terminaux) assurent eux-mêmes les fonctions de routage nécessaires à l'acheminement du trafic qui s'échange entre les nœuds distants. Grâce à cette autonomie d'établissement de la connectivité IP (Internet Protocol), les nœuds ad-hoc disposant d'une interconnexion à un réseau infrastructure, acquise grâce à leur présence dans la couverture radio du point d'accès à ce réseau, peuvent en faire bénéficier les nœuds situés hors de portée du réseau infrastructure, par relai du trafic de nœud en nœud. Toutefois, le maintien de la connectivité réseau d'une offre d'interconnexion ainsi étendue sur le plan spatial grâce au principe de routage multi-sauts, n'est pas nécessairement optimal dans ce mode de fonctionnement coopératif où tous les nœuds ne coopèrent pas nécessairement autant qu'attendu. Pour répondre à cette problématique, cette thèse propose la solution de routage optimisé MOOR (Multipath Operator-Optimized Routing), qui constitue une suite comprenant un protocole de routage (Gateway Route Discovery Protocol, GRDP), un protocole de découverte du voisinage (Router Solicitation Protocol, RSP) ainsi qu'un système de réputation centralisé au niveau de la passerelle d'interconnexion. Adoptant un principe de routage par la source, les nœuds source du réseau utilisent les valeurs de réputation en tant que métriques de routage, pour sélectionner parmi l'ensemble des routes découvertes grâce au protocole GRDP, celles optimales présentant le meilleur niveau de disponibilité - c'est-à-dire celles évitant les nœuds les plus indisponibles - pour faire acheminer leur trafic.
Download or read book Space Systems as Contributors to the NATO Defence Mission written by North Atlantic Treaty Organization. Advisory Group for Aerospace Research and Development. Mission Systems Panel. Symposium and published by . This book was released on 1997 with total page 202 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Future of Air Traffic Control written by National Research Council and published by National Academies Press. This book was released on 1998-01-26 with total page 343 pages. Available in PDF, EPUB and Kindle. Book excerpt: Automation in air traffic control may increase efficiency, but it also raises questions about adequate human control over automated systems. Following on the panel's first volume on air traffic control automation, Flight to the Future (NRC, 1997), this book focuses on the interaction of pilots and air traffic controllers, with a growing network of automated functions in the airspace system. The panel offers recommendations for development of human-centered automation, addressing key areas such as providing levels of automation that are appropriate to levels of risk, examining procedures for recovery from emergencies, free flight versus ground-based authority, and more. The book explores ways in which technology can build on human strengths and compensate for human vulnerabilities, minimizing both mistrust of automation and complacency about its abilities. The panel presents an overview of emerging technologies and trends toward automation within the national airspace systemâ€"in areas such as global positioning and other aspects of surveillance, flight information provided to pilots an controllers, collision avoidance, strategic long-term planning, and systems for training and maintenance. The book examines how to achieve better integration of research and development, including the importance of user involvement in air traffic control. It also discusses how to harmonize the wide range of functions in the national airspace system, with a detailed review of the free flight initiative.
Download or read book The Disappearing Computer written by Norbert Streitz and published by Springer. This book was released on 2007-07-20 with total page 314 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book examines how the computer, as we currently know it, will be replaced by a new generation of technologies, moving computing off the desktop and ultimately integrating it with real world objects and everyday environments. It provides a unique combination of concepts, methods and prototypes of ubiquitous and pervasive computing reflecting the current interest in smart environments and ambient intelligence.
Download or read book Rigorous System Design written by Joseph Sifakis and published by . This book was released on 2013-03-20 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt: Deals with the formalization of the design of mixed hardware/software systems. It advocates rigorous system design as a model-based process leading from requirements to correct implementations and presents the current state of the art in system design, discusses its limitations and identifies possible avenues for overcoming them.
Download or read book Telecommunication Network Economics written by Patrick Maillé and published by Cambridge University Press. This book was released on 2014-02-27 with total page 303 pages. Available in PDF, EPUB and Kindle. Book excerpt: An up-to-date guide to the economic issues in telecommunications, delivering a comprehensive overview from mathematical models to practical applications. Covering hot topics such as app stores, auctions for advertisements, search engine business models, network neutrality and virtual network operators, this resource is ideal for graduate students, researchers and industry practitioners.
Download or read book Ultra Wide Band Antennas written by Xavier Begaud and published by John Wiley & Sons. This book was released on 2013-03-04 with total page 217 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ultra Wide Band Technology (UWB) has reached a level of maturity that allows us to offer wireless links with either high or low data rates. These wireless links are frequently associated with a location capability for which ultimate accuracy varies with the inverse of the frequency bandwidth. Using time or frequency domain waveforms, they are currently the subject of international standards facilitating their commercial implementation. Drawing up a complete state of the art, Ultra Wide Band Antennas is aimed at students, engineers and researchers and presents a summary of internationally recognized studies.
Download or read book MIMO written by Alain Sibille and published by Academic Press. This book was released on 2010-12-03 with total page 385 pages. Available in PDF, EPUB and Kindle. Book excerpt: Foreword from Arogyaswami Paulraj, Professor (Emeritus), Stanford University (USA) - The first book to show how MIMO principles can be implemented in today's mobile broadband networks and components - Explains and solves some of the practical difficulties that arise in designing and implementing MIMO systems - Both theory and implementation sections are written in the context of the most recent standards: IEEE 802.11n (WiFi); IEEE 802.16 (WIMAX); 4G networks (3GPP/3GPP2, LTE)
Download or read book NATO Glossary of Terms and Definitions written by North Atlantic Treaty Organization and published by CreateSpace. This book was released on 2013-03-08 with total page 450 pages. Available in PDF, EPUB and Kindle. Book excerpt: NATO Glossary of terms and definitions (English and French). Listing terms of military significance and their definitions for use in NATO.
Download or read book Pervasive Mobile and Ambient Wireless Communications written by Roberto Verdone and published by Springer Science & Business Media. This book was released on 2012-01-02 with total page 696 pages. Available in PDF, EPUB and Kindle. Book excerpt: Reporting the findings of COST 2100, a major European intergovernmental project, this volume offers system designers a good source of guidelines based on channel characterization and measurement-based modeling, as well as worthwhile ideas for future research.
Download or read book Performance Evaluation Origins and Directions written by Günter Haring and published by Springer. This book was released on 2003-06-29 with total page 523 pages. Available in PDF, EPUB and Kindle. Book excerpt: This monograph-like state-of-the-art survey presents the history, the key ideas, the success stories, and future challenges of performance evaluation and demonstrates the impact of performance evaluation on a variety of different areas through case studies in a coherent and comprehensive way. Leading researchers in the field have contributed 19 cross-reviewed topical chapters competently covering the whole range of performance evaluation, from theoretical and methodological issues to applications in numerous other fields. Additionally, the book contains one contribution on the role of performance evaluation in industry and personal accounts of four pioneering researchers describing the genesis of breakthrough results. The book will become a valuable source of reference and indispensable reading for anybody active or interested in performance evaluation.
Download or read book Rare Event Simulation using Monte Carlo Methods written by Gerardo Rubino and published by John Wiley & Sons. This book was released on 2009-03-18 with total page 278 pages. Available in PDF, EPUB and Kindle. Book excerpt: In a probabilistic model, a rare event is an event with a very small probability of occurrence. The forecasting of rare events is a formidable task but is important in many areas. For instance a catastrophic failure in a transport system or in a nuclear power plant, the failure of an information processing system in a bank, or in the communication network of a group of banks, leading to financial losses. Being able to evaluate the probability of rare events is therefore a critical issue. Monte Carlo Methods, the simulation of corresponding models, are used to analyze rare events. This book sets out to present the mathematical tools available for the efficient simulation of rare events. Importance sampling and splitting are presented along with an exposition of how to apply these tools to a variety of fields ranging from performance and dependability evaluation of complex systems, typically in computer science or in telecommunications, to chemical reaction analysis in biology or particle transport in physics. Graduate students, researchers and practitioners who wish to learn and apply rare event simulation techniques will find this book beneficial.
Download or read book Internet Dreams written by Mark Stefik and published by MIT Press. This book was released on 1997 with total page 444 pages. Available in PDF, EPUB and Kindle. Book excerpt: Internet Dreams illuminates not only how "the Net" is being created, but also stories about ourselves as our lives become electronically interconnected. Stefik explores some of the most provocative writings about the Internet to tease out the deeper metaphors and myths. 24 illustrations.
Download or read book Transforming Computer Technology written by Arthur L. Norberg and published by Johns Hopkins University Press. This book was released on 2000-02-01 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Winner of the Association of American Publishers Professional and Scholarly Publishing Award for Computer Science Over the course of several decades, the Pentagon's Information Processing Techniques Office (IPTO) helped transform computing from a cumbersome enterprise based on batch processing to the instantly interactive, graphically rich, highly intelligent computing of today. With the purpose of improving command and control systems for the military, IPTO researchers strengthened time-sharing, laid the groundwork for graphics and parallel processing, contributed to the study of artificial intelligence, and developed the wide-area network that came to be known as the Internet. Transforming Computer Technology examines these and other developments at the Defense Department's Advanced Research Projects Agency in its heyday between 1962 and 1986. The authors show how Pentagon programs affected significant developments in both computer science and engineering. They analyze the management of the office, the origins and growth of important IPTO programs, and the interaction of the staff with the R & D community. They pay special attention to IPTO's role in executing research at the leading edge of computing and networking and in working with the military to transfer that research into practical use. And they show how, by the 1990s, the research results had been assimilated into systems both for the military and for civilian society.
Download or read book Quality of Experience written by Sebastian Möller and published by Springer. This book was released on 2014-07-08 with total page 431 pages. Available in PDF, EPUB and Kindle. Book excerpt: This pioneering book develops definitions and concepts related to Quality of Experience in the context of multimedia- and telecommunications-related applications, systems and services and applies these to various fields of communication and media technologies. The editors bring together numerous key-protagonists of the new discipline “Quality of Experience” and combine the state-of-the-art knowledge in one single volume.
Download or read book Where Wizards Stay Up Late written by Matthew Lyon and published by Simon and Schuster. This book was released on 1999-08-19 with total page 305 pages. Available in PDF, EPUB and Kindle. Book excerpt: Twenty five years ago, it didn't exist. Today, twenty million people worldwide are surfing the Net. Where Wizards Stay Up Late is the exciting story of the pioneers responsible for creating the most talked about, most influential, and most far-reaching communications breakthrough since the invention of the telephone. In the 1960's, when computers where regarded as mere giant calculators, J.C.R. Licklider at MIT saw them as the ultimate communications devices. With Defense Department funds, he and a band of visionary computer whizzes began work on a nationwide, interlocking network of computers. Taking readers behind the scenes, Where Wizards Stay Up Late captures the hard work, genius, and happy accidents of their daring, stunningly successful venture.
Download or read book NATO Glossary of Abbreviations Used in NATO Documents and Publications written by and published by . This book was released on 2008 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
