Département Réseau, Sécurité et Multimédia Rapport d'Activités 2008

Future workOur next step is to finalize the implementationof CXTP for IPsec and particularly the IKEv1context transfer. Then we finalize thesimulation implementation with support oflevel 3 protocols, and to perform an extensiveevaluation of proposed solutions.References[1] J. Loughney et al., “Context TransferProtocol”, RFC 4067, IETF, 2005[2] Automated Validation of Internet SecurityProtocols and Applications (AVISPA)http://www.avispa-project.org/[3] F. Allard, JM. Bonnin, “An application ofthe Context Transfer Protocol: IPsec in aIPv6 mobility environment”, Internationaljournal of communication networks anddistributed systems, 2008, vol. 1, n°1, pp.110-126Optimization of Wi-Fi-WiMAX vertical handoverResearch Staff : Jean-Marie Bonnin – Ph.D. Student: Mohamed KassabKeywords : heterogeneous access networks, vertical handover, secured handover, IEEE 802.11i,WiMAX, Wi-Fi, event-driven simulation.Applications : ambient networksPartners & Funding : project funded by France Telecom R&DIntroductionNowadays, terminals often include severalnetwork interfaces with different wirelesstechnologies such as GSM-GPRS, UMTS, IEEE802.11 (WiFi) or IEEE 802.16 (WiMAX).Wireless network operators wish to use thetechnology diversity in order to improve theircoverage and the experience of their clients. Ifsome areas may be simultaneously covered byseveral access networks that use differenttechnologies, network devices may be verydistant from each other in term of number ofhops and may use different mobilitymanagement mechanisms. Therefore,operators need an efficient vertical handover(i.e. inter technologies) that allows them tomix devices of different technologies in thesame access network or in close accessnetworks. It should allow transparenthandovers between technologies as efficient ashorizontal handover in terms of signaling costand handover latency while ensuring a goodnetwork services continuity.The “WiFi-WiMAX project” is a researchcontract initiated with France Telecom R&D inApril 2006. The main goal of the project is topropose vertical handover managementsolutions operating at the layer 2 level. Inparticular, we aim at ensuring fast and securehandover between IEEE 802.11 and IEEE802.16 networks.ObjectivesThe objectives of the project are:• Propose a state of the art of the proposedhandover (HO) management solution inthe literature and specially layer-2 andlayer-3 solutions,• Develop handover intra-technologyhandover management solutions related tothe IEEE 802.11 and IEEE 802.16networks,• Extend the proposed solutions to theheterogeneous handovers over bothtechnologies.• Propose an evaluation of proposedsolutions through analytic and simulationstudies,30 Extract of Pracom’s Annual Report 2008