Sophie Cœuré, Rachel Mazuy, Cousu de fil rouge

Mécanismes légers de gestion de la confiance pour des réseaux de capteurs sans fil

Communication in ad hoc networks, such as Wireless Sensor Networks (WSN), requires the implementation of decentralized algorithms to manage routing. The global issue of such algorithms rely strongly on the correct behavior of nodes. This increases the vulnerability of the system regarding malicious intrusions or local failures. We propose in this article an adaptation of a routing protocol for ...

Réduction d'interférence dans les systèmes de transmission sans fil

Wireless communications have known an exponential growth and a fast progress over the past few decades. Nowadays, wireless mobile communications have evolved over time starting with the first generation primarily developed for voice communications, and reaching the fourth generation referred to as long term evolution that offers an increasing capacity with much more users via different radio in...

Mécanismes de handover pour les réseaux IP sans fil

RÉSUMÉ . Le handover est le processus qui permet, à un terminal mobile, d’effectuer le passage entre deux points d’attachement à un réseau. Ce changement de point d’attachement implique une déconnexion momentanée du terminal mobile, et des perturbations des communications en cours. Ainsi, pour disposer d’une communication de qualité avec un terminal mobile, le handover doit introduire des mécan...

Architecture de communication pour les réseaux d'instrumentation sans fil

Sophie Racine

The first [4+2]-annulation between aminocyclobutanes and aldehydes to access tetrahydropyranyl amines is reported. With phthalimido cyclobutane dicarboxylates and aromatic aldehydes, tetrahydropyrans were obtained in 53-92% yield and 3:117:1 dr using scandium triflate or iron trichloride as catalyst. The use of thymineor fluorouracilsubstituted cyclobutanes gave direct access to six-membered ri...