Meteor - The 'MisbEhavior deTEctor and enfORcer': A protocol to mitigate routing misbehaviour under mobile ad-hoc networks

Master'sMASTER OF ENGINEERIN

Mobile Ad-Hoc Networks

Being infrastructure-less and without central administration control, wireless ad-hoc networking is playing a more and more important role in extending the coverage of traditional wireless infrastructure (cellular networks, wireless LAN, etc). This book includes state-of the-art techniques and solutions for wireless ad-hoc networks. It focuses on the following topics in ad-hoc networks: vehicular ad-hoc networks, security and caching, TCP in ad-hoc networks and emerging applications. It is targeted to provide network engineers and researchers with design guidelines for large scale wireless ad hoc networks

Orta Doğu Teknik Üniversitesi- Bilgi Toplumu Teknolojileri- Mükemmeliyet merkez projesi

TÜBİTAK EEEAG Proje01.02.200

Protocole de routage à chemins multiples pour des réseaux ad hoc

Ad hoc networks consist of a collection of wireless mobile nodes which dynamically exchange data without reliance on any fixed based station or a wired backbone network. They are by definition self-organized. The frequent topological changes make multi-hops routing a crucial issue for these networks. In this PhD thesis, we propose a multipath routing protocol named Multipath Optimized Link State Routing (MP-OLSR). It is a multipath extension of OLSR, and can be regarded as a hybrid routing scheme because it combines the proactive nature of topology sensing and reactive nature of multipath computation. The auxiliary functions as route recovery and loop detection are introduced to improve the performance of the network. The usage of queue length metric for link quality criteria is studied and the compatibility between single path and multipath routing is discussed to facilitate the deployment of the protocol. The simulations based on NS2 and Qualnet softwares are performed in different scenarios. A testbed is also set up in the campus of Polytech’Nantes. The results from the simulator and testbed reveal that MP-OLSR is particularly suitable for mobile, large and dense networks with heavy network load thanks to its ability to distribute the traffic into different paths and effective auxiliary functions. The H.264/SVC video service is applied to ad hoc networks with MP-OLSR. By exploiting the scalable characteristic of H.264/SVC, we propose to use Priority Forward Error Correction coding based on Finite Radon Transform (FRT) to improve the received video quality. An evaluation framework called SVCEval is built to simulate the SVC video transmission over different kinds of networks in Qualnet. This second study highlights the interest of multiple path routing to improve quality of experience over self-organized networks.Les réseaux ad hoc sont constitués d’un ensemble de nœuds mobiles qui échangent des données sans infrastructure de type point d’accès ou artère filaire. Ils sont par définition auto-organisés. Les changements fréquents de topologie des réseaux ad hoc rendent le routage multi-sauts très problématique. Dans cette thèse, nous proposons un protocole de routage à chemins multiples appelé Multipath Optimized Link State Routing (MP-OLSR). C’est une extension d’OLSR à chemins multiples qui peut être considérée comme une méthode de routage hybride. En effet, MP-OLSR combine la caractéristique proactive de la détection de topologie et la caractéristique réactive du calcul de chemins multiples qui est effectué à la demande. Les fonctions auxiliaires comme la récupération de routes ou la détection de boucles sont introduites pour améliorer la performance du réseau. L’utilisation de la longueur des files d’attente des nœuds intermédiaires comme critère de qualité de lien est étudiée et la compatibilité entre routage à chemins multiples et chemin unique est discutée pour faciliter le déploiement du protocole. Les simulations basées sur les logiciels NS2 et Qualnet sont effectuées pour tester le routage MP-OLSR dans des scénarios variés. Une mise en œuvre a également été réalisée au cours de cette thèse avec une expérimentation sur le campus de Polytech’Nantes. Les résultats de la simulation et de l’expérimentation révèlent que MP-OLSR est particulièrement adapté pour les réseaux mobiles et denses avec des trafics élevés grâce à sa capacité à distribuer le trafic dans des chemins différents et à des fonctions auxiliaires efficaces. Au niveau application, le service vidéo H.264/SVC est appliqué à des réseaux ad hoc MP-OLSR. En exploitant la hiérarchie naturelle délivrée par le format H.264/SVC, nous proposons d’utiliser un codage à protection inégale (PFEC) basé sur la Transformation de Radon Finie (FRT) pour améliorer la qualité de la vidéo à la réception. Un outil appelé SVCEval est développé pour simuler la transmission de vidéo SVC sur différents types de réseaux dans le logiciel Qualnet. Cette deuxième étude témoigne de l’intérêt du codage à protection inégale dans un routage à chemins multiples pour améliorer une qualité d’usage sur des réseaux auto-organisés

Intelligent Sensor Networks

In the last decade, wireless or wired sensor networks have attracted much attention. However, most designs target general sensor network issues including protocol stack (routing, MAC, etc.) and security issues. This book focuses on the close integration of sensing, networking, and smart signal processing via machine learning. Based on their world-class research, the authors present the fundamentals of intelligent sensor networks. They cover sensing and sampling, distributed signal processing, and intelligent signal learning. In addition, they present cutting-edge research results from leading experts

The Second Conference on Lunar Bases and Space Activities of the 21st Century, volume 2

These 92 papers comprise a peer-reviewed selection of presentations by authors from NASA, the Lunar and Planetary Institute (LPI), industry, and academia at the Second Conference on Lunar Bases and Space Activities of the 21st Century. These papers go into more technical depth than did those published from the first NASA-sponsored symposium on the topic, held in 1984. Session topics included the following: (1) design and operation of transportation systems to, in orbit around, and on the Moon; (2) lunar base site selection; (3) design, architecture, construction, and operation of lunar bases and human habitats; (4) lunar-based scientific research and experimentation in astronomy, exobiology, and lunar geology; (5) recovery and use of lunar resources; (6) environmental and human factors of and life support technology for human presence on the Moon; and (7) program management of human exploration of the Moon and space

In the eye of all trade : Maritime revolution and the transformation of Bermudian society, 1612-1800

This study examines the settlement of the British colony of Bermuda in 1612 and its development to 1800. Drawing heavily on primary sources, it is the first social and economic history of the island and an exploration of trade and migration within a pan-colonial network. The purpose of this dissertation is to bring Bermuda\u27s history to the attention of colonial historians and to map connections between Europe\u27s colonies within the Atlantic world.;Part I examines Bermuda\u27s initial settlement and its development under the Somers Island Company. The first English colony to successfully cultivate tobacco and to import slave labor, Bermudian society was demographically successful, Puritan in character, agrarian in focus, and economically self-sufficient. During the English Civil War, the colony enjoyed considerable autonomy, and trade with the Caribbean grew to rival tobacco in economic importance. Tensions between Bermudian planters and London investors led to the abolition of the company\u27s charter in 1684.;Parts II and III document Bermuda\u27s maritime revolution, the rapid and pervasive economic shift from tobacco agriculture to shipbuilding and commerce which prompted a radical restructuring of the island\u27s landscape and society. Bermuda\u27s multi-faceted maritime economy flexibly drew upon shipbuilding, transoceanic commerce, smuggling, privateering, salt raking, and wrecking throughout the Atlantic and Caribbean. Slaves built and sailed the island\u27s merchant fleet, laboring in racially integrated workplaces that altered earlier, agrarian slave-master relationships. Bermudian women raised families, ran farms, and supervised businesses while their husbands were away at sea. Within the Atlantic world, Bermuda was transformed from an isolated company enclave to an entrepot at the crossroads between two continents, through which information, material goods, and a variety of cultural influences flowed.;Part IV addressed Bermuda and American Revolution, during which the island\u27s fleet actively aided the American cause through smuggling. After the war, the British military garrisoned and fortified the island, which became a vital link between Canada and the British West Indies for the Royal Navy. This work raises larger questions about the relationships between economic activity and social structure, and the malleability of gender roles and the institution of slavery