132documents trouvés
Analysis of solutions for mobile and efficient transport layer in the context of terrestrial/satellite hybrid networks. D2 Deliverable
L.BERTAUX, P.BERTHOU, T.GAYRAUD, I.TOU, V.KRETZSCHMAR, F.PLANCHOU, P.AMER
SARA, EADS-ASTRIUM Tlse, Univ. of Delaware
Rapport de Contrat : CNES 104481/00, Mars 2012, 73p. , N° 12128
Non diffusable
126822Key factors in designing in-flight entertainment systems
A.AKL, T.GAYRAUD, P.BERTHOU
SARA, AASTMT
Rapport LAAS N°12012, Janvier 2012, 30p.
Diffusable
126183A SIP-based network QoS provisioning framework for cloud-hosted DDS applications
A.HAKIRI, A.GOKHALE, D.C.SCHMIDT, P.BERTHOU, J.HOFFERT, T.GAYRAUD
OLC, Vanderbilt
Manifestation avec acte : OnTheMove Federated Conferences & Workshops (OTM 2011), Crète (Grèce), 17-21 Octobre 2011, 18p. , N° 11472
Diffusable
126316A metric for evaluating density level of wireless sensor networks
A.AKL, T.GAYRAUD, P.BERTHOU
OLC
Manifestation avec acte : Wireless Days Conference (WD 2011), Niagara Falls (Canada), 10-12 Octobre 2011, 12p. , N° 11034
Lien : http://hal.archives-ouvertes.fr/hal-00661015
Diffusable
Plus d'informations
Abstract
The term "Dense networks" is usually used to identify networks having large number of nodes within a small area while affecting network performance. Starting from this concept, different networking solutions were proposed. However, it seems to us that this view is very abstract and needs to be further investigated. Knowing the network density level can be of great importance in determining the network parameters. In this paper, we firstly examine the effect of network size over its performance, then introduce a metric to determine if a network is considered as a "dense network" or not. Finally, we applied our metric on experimental results published in the CRAWDAD dataset site to verify our metric.
Geo-localization to enhance SCTP handover in public transports between satellite networks and WLAN
L.BERTAUX, P.BERTHOU, T.GAYRAUD, P.AMER
OLC, Univ. of Delaware
Manifestation avec acte : Ka and Broadband Communications, Navigation and Earth Observation Conference, Palerme (Italie), 3-5 Octobre 2011, pp.425-432 , N° 11847
Lien : http://hal.archives-ouvertes.fr/hal-00659862
Diffusable
126930SIP-based QoS support and session management for DDS-based distributed real-time and embedded systems
A.HAKIRI, P.BERTHOU, T.GAYRAUD, A.GOKHALE, J.HOFFERT, D.C.SCHMIDT
Vanderbilt, OLC
Manifestation avec acte : ACM International Conference on Distributed Event-Based Systems (DEBS 2011), New York (USA), 11-15 Juillet 2011, 11p. , N° 11312
Diffusable
125421Design of low cost PC-based simulators for education and training purpose using DDS
A.HAKIRI, P.BERTHOU, T.GAYRAUD
OLC
Manifestation avec acte : International Conference on Computer as a Tool (EUROCON 2011), Lisbonne (Portugal), 27-29 Avril 2011, 4p. , N° 11067
Lien : http://hal.archives-ouvertes.fr/hal-00595064/fr/
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Plus d'informations
Abstract
The use of simulation in training and education enables to prepare personal in realistic environment. But the cost and the complexity to create and reuse simulations often limits their application. In this paper we investigate a low cost and high fidelity PC-based simulator based on Data Distribution Service (DDS) middleware. The main parts of the systems and the architecture, including the hardware and the software are introduced. Real-time networking between distributed simulators is achieved using a reliable distributed communication, which employs publish-subscribe middleware build using OMG-DDS. Result shows these methods could produce low cost, extensible, reliable and distributed simulators.
An investigation of self-organization in ad-hoc networks
A.AKL, T.GAYRAUD, P.BERTHOU
OLC
Manifestation avec acte : International Conference on Networking Sensing and Control (ICNSC 2011), Delft (Pays Bas), 11-13 Avril 2011, pp.237-242 , N° 11048
Lien : http://hal.archives-ouvertes.fr/hal-00661017
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Plus d'informations
Abstract
Wireless Sensor Network (WSN) is an emerging special type of ad-hoc wireless networks technology. It is usually designed for special purpose applications. WSN has its own special characteristics that differentiate it from other types of wireless networks. These differences raise new challenges to be overcome; one of them is self-organization. As in any rising domain, it is essential to specifically define the meaning of new terminologies. The terms self-organizing and self-configuring are an example of such terms that may have overlapping meaning. In this investigation, we tried to make a definition for both terms to specifically determine their role in the ad-hoc domain, and stress on the differences between them. Consequently, we tried to show the importance of self-organization in enhancing sensor network's performance, and efficient usage of its resources. Thus, we tried to highlight the role of different networking layers in affecting self-organization to be a guideline during WSN design phase. We also introduced a new self-organizing protocol that utilizes directional antenna in an In-Flight entertainment system. Finally, we highlighted some of the future needs in the WSN domain, and their need for research attention.
Controlled stochastic petri net model for end-to-end network QoS provisioning in middleware-based multimedia and real-time systems
A.HAKIRI, P.BERTHOU, T.GAYRAUD
OLC
Manifestation avec acte : Spring Simulation Multi Conférences. Annual Simulation Symposium (ANSS11), Boston (USA), 4-9 Avril 2011, pp.118-125 , N° 11076
Lien : http://hal.archives-ouvertes.fr/hal-00594898/fr/
Diffusable
Plus d'informations
Abstract
End-to-end quality of service (QoS) is central to the objectives of the today's networks requirements of middleware based distributed real-time and embedded (DRE) systems. Any middleware based QoS system should be totally oriented to this goal, and in the scope of this purpose several mechanisms, components and approaches were, are being and will be developed in order to achieve it. In this paper, we show how controlled behavior of such QoS-aware systems can be developed based on stochastic Petri Nets. Afterwards, We show how to obtain, using such an interpreted formal model, powerful numerical analysis for the management of the network QoS.
Protocole de synchronisation hybride et directif pour réseaux de capteurs sans fil
E.ALBU, P.BERTHOU, T.GAYRAUD, Y.LABIT
OLC
Rapport LAAS N°11092, Mars 2011, 12p.
Diffusable
124084