Département Réseau, Sécurité et Multimédia Rapport d'Activités 2008

• Set up a test-bed integrating andimplementation of proposed solutions.RealizationThe project started with the study of verticalhandover management solutions in theliterature. We proposed a classification of thedescribed solutions based on the layer wherethey operate. We demonstrated the interest toinvestigate the possibility to manage verticalhandover at a layer-2 level (without theinvolvement of layer 3 mobility managementmechanism).Based on this study, we propose a generalframework to optimize the HO execution inlayer-2 level over proactive mechanismsperformances.In a second step, we apply the solutionsproposed in the framework to mange fast andsecure handover under the IEEE 802.11networks. This work results into two fast reauthenticationmethods under the IEEE802.11i security framework. These differentproposals have been analytically evaluatedunder different network architectures.We develop an implementation of the IEEE802.11 handover management solutions underthe network simulator SimulX. SimulX is anevent-driven network simulator developedTELECOM Bretagne, which is especiallydesigned for heterogeneous wireless accessnetworks and IPv6 mobility. We conductsimulation test and propose a performanceevaluation of the proposed mechanism under alarge-scale environment.Additionally, we proposed a realimplementation of the proposed fast reauthenticationmethods based on a set of opensource software’s that we modify. We usedthis test bed to perform functional tests thatattest of the good working of our mechanismsin a realistic environment.In a third step, we based on the proposed HOoptimization framework to specify intertechnologyhandover managementmechanisms for wireless networks based onthe IEEE 802.11 and IEEE 802.16 network.These mechanisms ensure a fast and securehandover for mobile station while preservingQoS management continuity.We develop an implementation of intertechnologyHO management mechanismsunder Simulx. Our goal is to conductperformance evaluation of these mechanisms.Future workNext steps in our works mainly consist of theevaluation of inter-technology HOmanagement mechanisms over simulationtests and analytic study to evaluate thebenefits of these mechanisms and also todetermine their limits. Based on evaluation ofinter and intra technology HO managementmechanisms, we hope to propose a generalevaluation of the general framework for HOmanagement proposed in the first step.References[1] F. Siddiqui, S. Zeadally, “Mobilitymanagement across hybrid wirelss networks:Trends and challenges”, Elsevier, ComputerCommunications, Volume 29, 2006[2] M. Kassab, A. Belghith, J.-M. Bonnin, andS. Sassi. “Fast Pre-Authentication Based onProactive Key Distribution for 802.11Infrastructure Networks”. In 1st ACMInternational Workshop on Wireless MultimediaNetworking and Performance Modeling(WMuNeP 2005), Montreal, Canada, October2005.[3] M. Kassab, A. Belghith, J.M. Bonnin,Implémentation de méthodes d'authentificationrapides sur un réseau IEEE 802.11. GEI'06,Hammemet-Tunisie mars 2006.[4] Nicolas Montavont, Julien Montavont, SafaàHachana, “Wireless IPv6 simulator: SimulX”,10th Communications and NetworkingSimulation Symposium (CNS07), March 2007,Norfolk, Virginia, USA.[5] M. Kassab and J.M. Bonnin and K.Guillouard, Securing fast handover in WLANs:a ticket based proactive authenticationscheme. Security and privacy in 4G networksworkshop - Globecom'07. November 2007[5] M. Kassab, J.M. Bonnin, A. Belghith, Fastand secure handover in WLANs: An evaluationof the signaling overhead. CCNC’08, LasVegas-USA, January 2008.Pracom’s Annual Report 2008 31