Publications (13)1.39 Total impact
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Article: On the use of passive clustering in wireless video sensor networks
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ABSTRACT: Wireless Video Sensor Networks are foreseen to be of a paramount importance in realising a wide spectrum of applications, mainly surveillance, target tracking and environment monitoring. In this paper, we propose a combination of an improved clustering algorithm and Directed Diffusion (DD), a well-known data-centric routing paradigm in sensor networks. On one hand, clustering allows to save bandwidth required by rich and intensive data of video applications. On the other hand, the network lifetime is prolonged by implementing an energy-aware load-balancing feature through modifying Passive Clustering (PC) rules for building/maintaining its topology. We performed extensive computer simulations and show in this paper that our solution outperforms original DD as well as when it is combined with PC with energy considerations but without load balancing.International Journal of Sensor Networks 03/2012; 11(2):67-80. · 1.39 Impact Factor -
Chapter: Cluster-based Routing Protocols for Energy-Ef?ciency in Wireless Sensor Networks
12/2010; , ISBN: 978-953-307-297-5 -
Article: End-to-End Available Bandwidth Measurement Tools : A Comparative Evaluation of Performances
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ABSTRACT: In recent years, there has been a strong interest in measuring the available bandwidth of network paths. Several methods and techniques have been proposed and various measurement tools have been developed and evaluated. However, there have been few comparative studies with regards to the actual performance of these tools. This paper presents a study of available bandwidth measurement techniques and undertakes a comparative analysis in terms of accuracy, intrusiveness and response time of active probing tools. Finally, measurement errors and the uncertainty of the tools are analysed and overall conclusions made.07/2007; -
Conference Proceeding: IGMPS, a New Tool for Estimating End-to-End Available Bandwidth in IP Network Paths.
Third International Conference on Networking and Services (ICNS 2007), June 19-25, 2007, Athens, Greece; 01/2007 -
Article: Application-oriented network metrology: Metrics and active measurement tools.
IEEE Communications Surveys and Tutorials. 01/2005; 7:2-24. -
Conference Proceeding: A tool to monitor the network quality of service.
Network Control and Engineering for QoS, Security and Mobility, IFIP TC6 / WG6.2 & WG6.7 Conference on Network Control and Engineering for QoS (net-Con 2002), October 23-25, 2002, Paris, France; 01/2002 -
Conference Proceeding: Creation of Virtual Manufacturing Devices by Means of Information System Models.
Towards World Class Manufacturing 1993, Proceedings of the IFIP TC5/WG5.3 Conference on Towards World Class Manufacturing 1993, Litchfield Park, Arizona, USA, 12-16 September, 1993; 01/1993 -
Article: Vers une ingénierie de réseaux respectueuse de l'environnement
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ABSTRACT: Les secteurs de l'ICT (Information and Communications Technologies) représentent actuellement 2% de l'empreinte totale carbone. Et le rapport SMART 2020 prévoit, d'ici 2020, le doublement de l'émission de carbone générée par l'ICT : c'est-à-dire 1,43 GtCO2/an dont 25% liée aux Réseaux et Télécoms. Parallèlement, les questions environnementales ne sont pas uniquement centrées sur l'émission de CO2, mais aussi sur d'autres facteurs comme la propagation des ondes radio des antennes GSM ou WIFI dont la nuisance sur la santé est encore mal évaluée, mais aussi sur la gestion des déchets des équipements de communication en fin de cycle de vie. L'objectif de cet article est de repositionner la problématique environnementale encore souvent très confuse dans le contexte de l'ingénierie des réseaux.Sixième Conférence Internationale Francophone d'Automatique, CIFA 2010. -
Article: Cluster-based Routing Protocols for Energy-Efficiency in Wireless Sensor Networks
Sustainable Wireless Sensor Networks. -
Article: Adaptation des applications distribuéesa la Qualité de Service fournie par le réseau de communication
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Article: Commande visuelle et orale d'un robot mobile
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ABSTRACT: Le but de ce papier est de présenter une interface de commande multimodale d'un robot mobile distant, équipé d'une caméra orientable en direction et azimut. Les modalités utilisées sont le regard associé à la parole ou au geste. Le champ d'applications que permet d'envisager le démonstrateur réalisé couvre des domaines variés, télésurveillance, handicap moteur, exploration de sites hostiles ou inaccessibles. Cet article décrit l'architecture matérielle, l'architecture logicielle et les différents protocoles de communication mis en oeuvre sur une plateforme démonstrative réalisée dans le cadre d'une collaboration régionale entre des équipes du CRAN et du LORIA. -
Article: Toward accuracy in end-to-end available bandwidth assessment using packet pair paradigm
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ABSTRACT: To measure available bandwidth, many different active probing techniques have been developed. The packet pair technique is one of the most popular of them. In this paper, we develop a new deterministic model of packet pair delays for end-to-end available bandwidth estimation in IP network paths. This model captures the relationship between the amount of cross traffic and the packet pair gap taking into account the size of each probing pair packet. Based on this deterministic model and considering a particular case obtained when the two packets of the probing pairs are of the same size, we develop an active measurement tool called IGMPS (Improved Gap Model using Packet Size parameter ) that estimates the end-to-end available bandwidth at the bottleneck link of the path. Based on an experimental analysis in various network testbed configurations, we present IGMPS measurement results that verify the tool behavior and illustrate its accuracy. Then, we investigate the quantitative relationship of IGMPS measurement accuracy to several probing parameters such as the packet size and the number of probing packet pairs. Our experiments show that introducing the packet size parameter in the probe gap model formula improves considerably the accuracy of the measurements. -
Article: An Enhanced Packet Pair Model for End-to-end Available Bandwidth Estimation in IP network Paths
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ABSTRACT: Among the different parameters charachterizing traffic and networks, one of the most significant is the availble bandwidth of network path. This is due to the important role of available bandwidth in traffic engineering algorithms as well as in other scenarios like file sharing, server selection, and in general network aware applications. In this paper, we first constructe a deterministic model for estimating end-to-end available bandwidth in the path. This model is based on the packet pair probing technique and takes into account the packet size parameter. Then, we implement the proposed model in a new measurement tool called IGMPS (Improved Gap Model using Packet Size parameter). Through experiments, we found IGMPS to be very accurate across a wide range of traffic scenarios. We also compared it to Spruce tool and found it to be much more accurate.
