logo EDITE Mohamed El Mehdi BEZAHAF
Mohamed El Mehdi BEZAHAF
État académique
Thèse soutenue le 2010-12-09
Sujet: Transparent and distributed client tracking in wireless mesh networks
Direction de thèse:
Ellipse bleue: doctorant, ellipse jaune: docteur, rectangle vert: permanent, rectangle jaune: HDR. Trait vert: encadrant de thèse, trait bleu: directeur de thèse, pointillé: jury d'évaluation à mi-parcours ou jury de thèse.
Productions scientifiques
LORD: Tracking Mobile Clients in a Real Mesh
Transparent and Distributed Localization of Mobile Users in Wireless Mesh Networks
Localization of mobile users in wireless mesh networks (WMN) generally relies on some sort of flooding-based technique. Broadcasting the network is good for reliability but leads to increased latency and broadcast storm problems. This results in low efficiency of the location management mechanism in terms of packets loss and disconnection time. In this paper, we investigate a new DHT-based location management scheme through experimental evaluation on our WMN testbed. The main features of our proposed scheme are that broadcast packets are totally avoided and node localization becomes transparent to the users. We compare it to our previous flooding-based location scheme, namely EMM (Enhanced Mobility Management). Our results show improved performance both in terms of dropped packets and handover latency introduced to re-establish open sessions after a user moves.
Quality of Service in Heterogeneous Networks: 6th International ICST Conference on Heterogeneous Networking for Quality, Reliability, Security and Robustness, QShine 2009 and 3rd International Workshop on Advanced Architectures and Algorithms for Internet Delivery and Applications, AAA-IDEA 2009 ICST Conference on Heterogeneous Networking for Quality, Reliability, Security and Robustnessproceeding with peer review 2009
Note sur les performances de TCP dans un environnement sans-fil multisaut
Colloque francophone sur l'ingenierie des protocoles (CFIP'09) 2009
Practical DHT-Based Location Service for Wireless Mesh Networks
Insights into the Routing Stability of a Multi-hop Wireless Testbed
By nature, links in multi-hop wireless networks have an unpredictable behavior, which directly affects the stability of routes. In this paper, we investigate the stability of the network by addressing some interesting questions related to the presence of both dominant and sub-dominant routes between nodes, in a real deployment. We focus on the persistence of the dominant route and the first four sub-dominant routes. The persistence is computed as the percentage of time that a given route is used. We note that source-destination pairs mostly use the dominant route and two sub-dominant routes to communicate, but with a low persistence. We also investigate the number of hops crossed by these routes and their impact on the stability. It turns out that the larger the number of hops, the larger the number of sub-dominant routes. However, when exceeding four hops, the notion of dominance fades.
Lecture Notes of the Institute for Computer Sciences, Social Informatics and Telecommunications Engineering 49 Springer 2010 International Conference on Ad Hoc Networks (AdHocNets)proceeding with peer review 2010
Soutenance: 2010-12-09