Download or read book Analyse du DoS dans les r seaux mobiles ad hoc MANETs written by Abdourahime Gaye and published by Editions Universitaires Europeennes. This book was released on 2012-01 with total page 96 pages. Available in PDF, EPUB and Kindle. Book excerpt: Un reseau mobile ad hoc (MANET) est un systeme autonome de n uds mobiles relies par des liens sans fil dont l'union forme un graphe arbitraire. Les n uds du reseau jouent le role de routeurs et sont libres de se deplacer aleatoirement et de s'organiser arbitrairement. En consequence, la topologie du reseau peut changer rapidement et de maniere imprevisible. Un tel reseau ne necessite pas d'infrastructure fixe et represente une option attractive pour connecter spontanement des terminaux mobiles. quelque soit l'application visee, un reseau MANET possede des exigences specifiques en terme de securite, du fait de ses particularites: liens sans fil, contraintes d'energie, limitation de la bande passante et de la puissance de calcul, non connectivite permanente d'un n ud avec les autres n uds

Download or read book Protocoles de routage pour les r seaux ad hoc written by Redouane Hamza and published by . This book was released on 2004 with total page 224 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Protocoles de routage pour les r seaux ad hoc microforme written by Redouane Hamza and published by Montréal : Service des archives, Université de Montréal, Section Microfilm. This book was released on 2005 with total page 224 pages. Available in PDF, EPUB and Kindle. Book excerpt:

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 Initialisation et routage par permutation dans les reseaux mobiles ad hoc written by Djibo Karimou and published by . This book was released on 2006 with total page 148 pages. Available in PDF, EPUB and Kindle. Book excerpt: De nos jours l’intérêt porté aux réseaux mobiles s’est accru, ceci est dû aux demandes présentes des consommateurs, des applications industrielles et à la miniaturisation des composantes électroniques. Contrairement aux réseaux mobiles de types cellulaires qui nécessitent une infrastructure robuste, les réseaux Ad Hoc (ou MANET) doivent être déployés rapidement, s’auto-organiser pour fournir des services. Ils sont ainsi déployés en cas de sinistre (tremblement de terre, incendie, sauvetage...) et peuvent être aussi utilisés pour des applications spécifiques.Un réseau Ad Hoc est un système distribué d’entités mobiles interconnectées par une technologie sans fil formant un réseau temporaire sans l’aide de toute infrastructure préexistante ou administration centralisée. Le réseau que nous considérons à p stations. Typiquement, ces nœuds sont de petites tailles, pas chers à l’achat, utilisant chacune des batteries qui sont déployées sur demande pour des applications.Comme petit exemple : nous imaginons une situation ou un tremblement ou un sinistre se produit dans une région particulière. Il n y’a aucun doute que les moyens de communication de cette région comme les lignes téléphoniques, l’Internet, seront complètement détruits par le sinistre. Dans cette situation, la nécessité rapide de secours, de police, les pompiers ainsi que les ambulances s’impose. Chaque véhicule des secours doit être équipé d’un terminal lui permettant de communiquer avec les autres. Ces terminaux vont former un réseau temporaire assurant les communications. En un mot, ces terminaux vont être liés entre eux et des nouveaux terminaux peuvent être ajoutés au système. Les terminaux peuvent se comporter aussi bien comme des émetteurs, receveurs que comme des routeurs.Puisque les stations du réseau sont déployées dans des endroits où il n’y a pas d’infrastructures, et qu’elles sont sans assistance, elles doivent être capable de s’auto-organiser. Les stations n’ont pas d’identités au départ et ne peuvent pas se distinguer les unes des autres. Elles peuvent communiquer à travers k canaux MANET (n, k).Le problème est de trouver un protocole qui permettrait à chaque station d’acquérir un numéro unique (son identité) i (pour i variant de 1 à p). C’est le problème d’initialisation. Nous nous proposons d’étudier l’existence de protocoles d’initialisation qui terminent toujours avec succès. Ainsi, nous avons recours au processus de Markov pour y arriver. Notre idée est de construire un arbre binaire qui résout le problème de l’initialisation et ensuite en déduire un processus de Markov.Un autre problème sur ce type de réseaux est celui de l’initialisation avec conservation De nos jours l’intérêt porté aux réseaux mobiles s’est accru, ceci est dû aux demandes présentes des consommateurs, des applications industrielles et à la miniaturisation des composantes électroniques. Contrairement aux réseaux mobiles de types cellulaires qui nécessitent une infrastructure robuste, les réseaux Ad Hoc (ou MANET) doivent être déployés rapidement, s’auto-organiser pour fournir des services. Ils sont ainsi déployés en cas de sinistre (tremblement de terre, incendie, sauvetage...) et peuvent être aussi utilisés pour des applications spécifiques.Un réseau Ad Hoc est un système distribué d’entités mobiles interconnectées par une technologie sans fil formant un réseau temporaire sans l’aide de toute infrastructure préexistante ou administration centralisée. Le réseau que nous considérons à p stations. Typiquement, ces nœuds sont de petites tailles, pas chers à l’achat, utilisant chacune des batteries qui sont déployées sur demande pour des applications.

Download or read book Mobile and Wireless Communication Networks written by Guy Pujolle and published by Springer Science & Business Media. This book was released on 2006-07-31 with total page 243 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume presents proceedings from the 19th IFIP World Computer Congress in Santiago, Chile. The proceedings of the World Computer Congress are a product of the gathering of 2,000 delegates from more than 70 countries to discuss a myriad of topics in the ICT domain. Of particular note, this marks the first time that a World Computer Congress has been held in a Latin American country. Topics in this series include: The 4th International Conference on Theoretical Computer Science Education for the 21st Century- Impact of ICT and Digital Resources Mobile and Wireless Communication Networks Ad-Hoc Networking Network Control and Engineering for QoS, Security, and Mobility The Past and Future of Information Systems: 1976-2006 and Beyond History of Computing and Education Biologically Inspired Cooperative Computing Artificial Intelligence in Theory and Practice Applications in Artificial Intelligence Advanced Software Engineering: Expanding the Frontiers of Software For a complete list of the more than 300 titles in the IFIP Series, visit springer.com. For more information about IFIP, please visit ifip.org.

Download or read book Quantum Communications and Cryptography written by Alexander V. Sergienko and published by CRC Press. This book was released on 2018-10-03 with total page 248 pages. Available in PDF, EPUB and Kindle. Book excerpt: All current methods of secure communication such as public-key cryptography can eventually be broken by faster computing. At the interface of physics and computer science lies a powerful solution for secure communications: quantum cryptography. Because eavesdropping changes the physical nature of the information, users in a quantum exchange can easily detect eavesdroppers. This allows for totally secure random key distribution, a central requirement for use of the one-time pad. Since the one-time pad is theoretically proven to be undecipherable, quantum cryptography is the key to perfect secrecy. Quantum Communications and Cryptography is the first comprehensive review of the past, present, and potential developments in this dynamic field. Leading expert contributors from around the world discuss the scientific foundations, experimental and theoretical developments, and cutting-edge technical and engineering advances in quantum communications and cryptography. The book describes the engineering principles and practical implementations in a real-world metropolitan network as well as physical principles and experimental results of such technologies as entanglement swapping and quantum teleportation. It also offers the first detailed treatment of quantum information processing with continuous variables. Technologies include both free-space and fiber-based communications systems along with the necessary protocols and information processing approaches. Bridging the gap between physics and engineering, Quantum Communications and Cryptography supplies a springboard for further developments and breakthroughs in this rapidly growing area.

Download or read book Graph Colouring and the Probabilistic Method written by Michael Molloy and published by Springer Science & Business Media. This book was released on 2013-06-29 with total page 320 pages. Available in PDF, EPUB and Kindle. Book excerpt: Over the past decade, many major advances have been made in the field of graph coloring via the probabilistic method. This monograph, by two of the best on the topic, provides an accessible and unified treatment of these results, using tools such as the Lovasz Local Lemma and Talagrand's concentration inequality.

Download or read book Applications of Evolutionary Computation written by Cecilia Di Chio and published by Springer. This book was released on 2010-04-03 with total page 644 pages. Available in PDF, EPUB and Kindle. Book excerpt: Evolutionary Computation (EC) techniques are e?cient, nature-inspired me- ods based on the principles of natural evolution and genetics. Due to their - ciency and simple underlying principles, these methods can be used for a diverse rangeofactivitiesincludingproblemsolving,optimization,machinelearningand pattern recognition. A large and continuously increasing number of researchers and professionals make use of EC techniques in various application domains. This volume presents a careful selection of relevant EC examples combined with a thorough examination of the techniques used in EC. The papers in the volume illustrate the current state of the art in the application of EC and should help and inspire researchers and professionals to develop e?cient EC methods for design and problem solving. All papers in this book were presented during EvoApplications 2010, which included a range of events on application-oriented aspects of EC. Since 1998, EvoApplications — formerly known as EvoWorkshops— has provided a unique opportunity for EC researchers to meet and discuss application aspects of EC and has been an important link between EC research and its application in a variety of domains. During these 12 years, new events have arisen, some have disappeared,whileothershavematuredtobecomeconferencesoftheirown,such as EuroGP in 2000, EvoCOP in 2004, and EvoBIO in 2007. And from this year, EvoApplications has become a conference as well.

Download or read book Advances in Sensors Reviews Vol 7 Physical and Chemical Sensors Design Applications Networks written by Sergey Yurish and published by Lulu.com. This book was released on with total page 300 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Ant Algorithms written by Marco Dorigo and published by Springer. This book was released on 2003-08-02 with total page 318 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book constitutes the refereed proceedings of the Third International Workshop on Ant Algorithms, ANTS 2002, held in Brussels, Belgium in September 2002. The 17 revised full papers, 11 short papers, and extended poster abstracts presented were carefully reviewed and selected from 52 submissions. The papers deal with theoretical and foundational aspects and a variety of new variants of ant algorithms as well as with a broad variety of optimization applications in networking and operations research. All in all, this book presents the state of the art in research and development in the emerging field of ant algorithms

Download or read book Reflexing Interfaces The Complex Coevolution of Information Technology Ecosystems written by Orsucci, Franco F. and published by IGI Global. This book was released on 2008-03-31 with total page 432 pages. Available in PDF, EPUB and Kindle. Book excerpt: "This book discusses the application of complex theories in information and communication technology, with a focus on the interaction between living systems and information technologies, providing researchers, scholars, and IT professionals with a fundamental resource on such topics as virtual reality; fuzzy logic systems; and complexity science in artificial intelligence, evolutionary computation, neural networks, and 3-D modeling"--Provided by publisher.

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 Artificial Ants written by Nicolas Monmarché and published by Wiley-ISTE. This book was released on 2010-12-01 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: During the last decade, artificial ants have experienced rapid development in the research community, mainly for solving optimization problems. This book provides an overview of the situation ant colony algorithms reached. Artificial Ants encompasses solution methods of hard optimization problems and new trends for collective intelligence. Part 1 helps to understand the basis of ant colony algorithms, and to discover a panorama of applications in the field of optimization, particularly in the industrial world. Part 2 deals with broader issues and provides an overview of current research in the field of artificial ants.

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 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 Swarm Intelligence written by Christian Blum and published by Springer Science & Business Media. This book was released on 2008-09-24 with total page 284 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book’s contributing authors are among the top researchers in swarm intelligence. The book is intended to provide an overview of the subject to novices, and to offer researchers an update on interesting recent developments. Introductory chapters deal with the biological foundations, optimization, swarm robotics, and applications in new-generation telecommunication networks, while the second part contains chapters on more specific topics of swarm intelligence research.