Ad hoc networks are systems that can establish communication sessions between users without using any kind of infrastructure. Hence, the network must be self-organized and dynamically adaptive. Nodes in ad hoc networks are in constant movement. Delivering packets to a specific destination becomes a complex task. Today, four routing protocols were standardized by the IETF (Internet Engineering Task Force) to offer a solution for routing problems. These solutions are divided into two categories: proactive (routes are always available) and reactive (routes are discovered on demand). OLSR (Optimized Link State Routing Protocol), developed at INRIA, is a proactive protocol based on link state routing mechanisms.
In our work we have addressed issues of quality of service and security. All standardized protocols try to find a route from a source to a destination by considering only one metric: the number of hops. Also, these protocols do not take into account any security consideration and still are vulnerable to attacks. We consider up to four metrics to establish routes, including delay, available bandwidth, jitter, loss probability, etc. This should allow flows to reach their destination with an increased quality of service. We also consider the multipath routing and path oscillation problems. Concerning security, we are working on a solution to secure OLSR. Our mechanism must enumerate the most important attacks and provides mechanisms that eliminate all negative effects on routing information. The solution will be based on distributing secure keys to nodes without using any centralized mechanism since this is not feasible in an ad hoc context.
Equipes-projets Inria communes
One step forward: Linking wireless self-organizing network validation techniques with formal testing approaches
Logiciels et brevets
JOHNEN Colette TIXEUIL Sébastien AL AGHA Khaldoun GAWEDZKI Ignacy TRIANTAFYLLIDOU Despoina RAHME Joseph ODOU Simon BENFATTOUM Youghourta
Thèses et habilitations
Quelques Contributions à l'auto-stabilisation Vers l'auto-stabilisation des systèmes à grande échelle Auto-stabilisation et partitionnement Algorithmes distribués pour la sécurité et la qualité de service dans les réseaux ad hoc mobiles