Strat Gie De Management Des Connexions Dans Les R Seaux Cellulaires Satellitaires

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Strat Gie De Management Des Connexions Dans Les R Seaux Cellulaires Satellitaires

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Author : Malek Benslama
language : fr
Publisher: ISTE Group
Release Date : 2015-03-01

Strat Gie De Management Des Connexions Dans Les R Seaux Cellulaires Satellitaires written by Malek Benslama and has been published by ISTE Group this book supported file pdf, txt, epub, kindle and other format this book has been release on 2015-03-01 with Artificial satellites in telecommunication categories.

Un système de positionnement doit être intégré au MSS afin de localiser les UMs et de les suivre durant leurs connexions au réseau. Cet ouvrage propose une approche originale basée sur les avantages du modèle de mobilité des MSS LEO pour l’évaluation de différentes informations concernant un UM avec appel en cours, même si sa position est inconnue. Cette méthode expose deux stratégies de priorité pour requêtes handover, Pseudo Last Useful Instant (PLUI) etDynamic Channel Reservation-like (DCR-like) basées respectivement sur les stratégies LUI et DCR. Un système de décision Rescuing System (RS) permet ici de résoudre les appels de courte durée perdus à cause d’un échec de la procédure handover. Stratégie de management des connexions dans les réseaux cellulaires satellitaires présente également une nouvelle règle de Diffserv fondée sur la propriété de l’allocation de bande passante lors de la congestion, appelée Proportionnelle Allocation of Bandwidth (PAB). La PAB peut être utilisée pour les réseaux satellites GEO, MEO et LEO au cours de la congestion. Il montre les avantages d’utiliser la PAB dans les réseaux IP par satellite.

Connections Management Strategies In Satellite Cellular Networks

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Author : Malek Benslama
language : en
Publisher: John Wiley & Sons
Release Date : 2015-02-02

Connections Management Strategies In Satellite Cellular Networks written by Malek Benslama 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 2015-02-02 with Technology & Engineering categories.

This book provides a novel method based on advantages of mobility model of Low Earth Orbit Mobile Satellite System LEO MSS which allows the evaluation of instant of subsequent handover of a MS even if its location is unknown. This method is then utilized to propose two prioritized handover schemes, Pseudo Last Useful Instant PLUI strategy and Dynamic Channel Reservation DCR-like scheme based respectively on LUI and DCR schemes, previously proposed in literature. The authors also approach a different aspect of handover problem: calls with short durations dropped due to a handover failure. We propose a decision system based on fuzzy logic Rescuing System that allows the rescue of calls with short durations facing a premature at the expense of those lasting for long durations.

Transitions Des Communications Num Riques Vers Les Communications Quantiques

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Author : Malek Benslama
language : fr
Publisher: ISTE Group
Release Date : 2016-11-01

Transitions Des Communications Num Riques Vers Les Communications Quantiques written by Malek Benslama and has been published by ISTE Group this book supported file pdf, txt, epub, kindle and other format this book has been release on 2016-11-01 with Digital communications categories.

Technologie permettant l’échange sûr de données à haute vitesse, la communication quantique est un nouveau mode de communication dont les enjeux sont stratégiques. Cet ouvrage présente un état de l’art exhaustif des communications quantiques et étudie leurs spécificités à travers l’intrication et les états de Bell. Les portes quantiques telles que les portes de Deutsch, les portes de Toffoli et les portes de Dedekind sont analysées du fait de leur faisabilité comme circuits électroniques et de leur implantation dans les systèmes. Une comparaison est développée en parallèle avec les circuits conventionnels tels que les FPGA et les DSP. Les aspects mathématiques et physiques des fibres optiques quantiques et des cristaux photoniques sont également détaillés dans le but d’optimiser les transmissions quantiques. Une partie pratique permet d’approfondir les concepts à l’aide de six applications intégrées relatives aux systèmes MIMO, aux ondelettes, au radar adaptatif, au radar SAR, aux fonctions de croyance et à la géométrie à travers les réseaux.

Bulletin Signal Tique Des T L Communications

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Author :
language : fr
Publisher:
Release Date : 1994-07

Bulletin Signal Tique Des T L Communications written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1994-07 with Telecommunication categories.

Information And Communication Technologies For Development In Africa The Experience With Community Telecenters

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Author : Ramata Molo Thioune
language : en
Publisher: IDRC
Release Date : 2003

Information And Communication Technologies For Development In Africa The Experience With Community Telecenters written by Ramata Molo Thioune and has been published by IDRC this book supported file pdf, txt, epub, kindle and other format this book has been release on 2003 with Business & Economics categories.

Volume 3 documents the processes used, and institutions created, to bring computers and connectivity into schools, as a means of enhancing the use and integration of ICTs in teaching and learning. A range of project, administrative, and cultural settings are explored as are a wide variety of technical solutions. The results, observations, and conclusions presented in this book will be useful for policy- and decision-makers in education and ICTs. The book will also be useful for teachers, researchers, and development practitioners and professionals with interests or active programs in the area of "ICT for development." Information technology professionals looking to service the potential education market will also find this book valuable.

The Radio Spectrum

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Author : Jean-Marc Chaduc
language : en
Publisher: John Wiley & Sons
Release Date : 2010-01-05

The Radio Spectrum written by Jean-Marc Chaduc 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 2010-01-05 with Technology & Engineering categories.

Radio frequencies have become a basic resource for the development of the information society. In fact, radio waves are a mandatory vehicle in order to carry the message to customers and a truly worldwide communication needs their properties. Given the market demands for more and more frequencies, means have to be found to share this limited resource most effectively and to continuously improve its efficiency. Radio spectrum management is thus a major objective for our modern world. This book describes the current tools for spectrum management with their fundamental technical and legal basis. It outlines the global evolution of radio services in their different application domains and introduces the actors who contribute to the collective management of the spectrum. It also discusses the main questions these actors have to deal with and answer in order to design for the future.

Management Information System

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Author : Dr. Sourabh Sharma & Prof. K. S. Thakur
language : en
Publisher: Horizon Books ( A Division of Ignited Minds Edutech P Ltd)
Release Date : 2015-02-01

Management Information System written by Dr. Sourabh Sharma & Prof. K. S. Thakur and has been published by Horizon Books ( A Division of Ignited Minds Edutech P Ltd) this book supported file pdf, txt, epub, kindle and other format this book has been release on 2015-02-01 with categories.

Lte And Lte Advanced

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Author : André Pérez
language : en
Publisher: John Wiley & Sons
Release Date : 2015-12-07

Lte And Lte Advanced written by André Pérez 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 2015-12-07 with Technology & Engineering categories.

This book presents the technical characteristics of the two radio network interfaces of mobile 4G, LTE and LTE Advanced, based on Release 8, 9 and 10 of the 3GPP specifications. Points covered include a detailed description of various components of the radio interface. RRC signaling messages used to establish the connection, enabling the security, the paging, the establishment and the release of dedicated and default support and the handover. The PDCP ensures the security of the transmission and allows the recovery during handover and the compression of the headers. The RLC protocol defines the transmission modes with or without acknowledgment. The MAC protocol determines the random access, the data transfer, the timing advance, the scheduling and the discontinuous reception. The physical layer includes a description of the methods of multiplexing (time, frequency and space) and the various signals and physical channels.

Lte Advanced Pro

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Author : Frédéric Launay
language : en
Publisher: John Wiley & Sons
Release Date : 2019-06-04

Lte Advanced Pro written by Frédéric Launay 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 2019-06-04 with Technology & Engineering categories.

This book presents LTE evolution towards 5G mobile communication and the emergence of new requirements for MBB, MTC and LLC services. As LTE technologies evolve, LTE Advanced Pro dramatically increases cell capacity and user data rates for the MBB unicast service. Such requirements are obtained using full-dimension MIMO, carrier aggregation (on either licensed or unlicensed frequency bands) and dual connectivity. To improve the efficiency of same-content delivery to multiple users, 3GPP proposes a group communications service over LTE and defines mission critical push-to-talk (MCPTT) for dedicated public safety services. Complementary low-cost and low-power modems with enhanced coverage and massive connectivity are emerging. Thus, this book also discusses the need for LTE to support low-rate transmission and high-latency communication for MTC services.

Forces Of Production

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Author : David Noble
language : en
Publisher: Routledge
Release Date : 2017-07-12

Forces Of Production written by David Noble and has been published by Routledge this book supported file pdf, txt, epub, kindle and other format this book has been release on 2017-07-12 with Business & Economics categories.

Focusing on the design and implementation of computer-based automatic machine tools, David F. Noble challenges the idea that technology has a life of its own. Technology has been both a convenient scapegoat and a universal solution, serving to disarm critics, divert attention, depoliticize debate, and dismiss discussion of the fundamental antagonisms and inequalities that continue to beset America. This provocative study of the postwar automation of the American metal-working industry—the heart of a modern industrial economy—explains how dominant institutions like the great corporations, the universities, and the military, along with the ideology of modern engineering shape, the development of technology. Noble shows how the system of "numerical control," perfected at the Massachusetts Institute of Technology (MIT) and put into general industrial use, was chosen over competing systems for reasons other than the technical and economic superiority typically advanced by its promoters. Numerical control took shape at an MIT laboratory rather than in a manufacturing setting, and a market for the new technology was created, not by cost-minded producers, but instead by the U. S. Air Force. Competing methods, equally promising, were rejected because they left control of production in the hands of skilled workers, rather than in those of management or programmers. Noble demonstrates that engineering design is influenced by political, economic, managerial, and sociological considerations, while the deployment of equipment—illustrated by a detailed case history of a large General Electric plant in Massachusetts—can become entangled with such matters as labor classification, shop organization, managerial responsibility, and patterns of authority. In its examination of technology as a human, social process, Forces of Production is a path-breaking contribution to the understanding of this phenomenon in American society.