140documents trouvés
Multi-level modeling for adaptive collaborative ubiquitous systems
I.BOUASSIDA, G.SANCHO, S.TAZI, T.VILLEMUR, K.DRIRA, C.CHASSOT, M.JMAIEL
ReDCAD Laboratory, OLC
Rapport LAAS N°09067, Mars 2009, 15p.
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Mots-Clés / Keywords
Ubiquitous computing; Collaboration; Multi-level modelling; Context awareness;
Model-based adaptation for context-aware dynamic architectures supporting group communication
I.BOUASSIDA, K.DRIRA, C.CHASSOT, M.JMAIEL
OLC, ReDCAD Laboratory
Rapport LAAS N°09037, Février 2009, 11p.
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Mots-Clés / Keywords
Dynamic architectures; Context-aware; Rule-driven; Graph transformation;
D3.5. Validation and exploitation report
I.MILOUCHEVA, D.WAGNER, Ch.NIEPHAUS, C.CHASSOT, N.VAN WAMBEKE, P.A.ARANDA GUTIERREZ, F.TRIVUNAC, C.BRANDAUER, A.FLIZIKOWSKI, S.KHAVTASI, F.ARMANDO, S.RAO, S.PIETRO ROMANO
FHG, OLC, TID, SR, AMU, TESLCOM, UNINA
Rapport de Contrat : Projet IST NETQoS N° 033516, Février 2009, 50p. , N° 09035
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Mots-Clés / Keywords
Test case; Verification; Validation; Validation criteria; Performance assessment;
Modeling reconfigurable structured multi-level architectures for adaptive deployment of cooperative interactive applications
M.MILADI, I.BOUASSIDA, M.JMAIEL, K.DRIRA, C.CHASSOT
ReDCAD Laboratory, OLC
Rapport LAAS N°09029, Février 2009, 29p.
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116384D3.4. Performance assessment
P.A.ARANDA GUTIERREZ, G.GARCIA DE BLAS, I.MILOUCHEVA, D.WAGNER, Ch.NIEPHAUS, C.CHASSOT, N.VAN WAMBEKE, A.ABDELKEFI, C.BRANDAUER, A.FLIZIKOWSKI, S.KHAVTASI, F.ARMANDO, S.RAO, S.PIETRO ROMANO
TID, FHG, OLC, SR, AMU, TESLCOM, UNINA
Rapport de Contrat : Projet IST NETQoS N° 033516, Février 2009, 83p. , N° 09034
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Mots-Clés / Keywords
Performance assessment; Trial execution; QoS; Policy specification; Provisioning; Adaptation; NETQoS;
Building self-optimized communication systems based on applicative cross-layer information
E.EXPOSITO, M.GINESTE, L.DAIRAINE, C.CHASSOT
OLC
Revue Scientifique : Computer Standards & Interfaces, Vol.31, N°2, pp.354-361, Février 2009 , N° 08351
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Abstract
This article proposes the Implicit Packet Meta Header (IPMH) as a standard method to compute and represent common QoS properties of the Application Data Units (ADU) of multimedia streams using legacy and proprietary streams headers (e.g. Real-time Transport Protocol headers). The use of IPMH by mechanisms located at different layers of the communication architecture will allow implementing fine per-packet self-optimization of communication services regarding the actual application requirements. A case study showing how IPMH is used by error control mechanisms in the context of wireless networks is presented in order to demonstrate the feasibility and advantages of this approach.
Mots-Clés / Keywords
Self-optimizing; QoS; Cross-layer; Multimedia;
A modelling and simulation framework for multi-level architectural reconfiguration applied to adaptability management in mobile cooperative communication support systems
I.BOUASSIDA, T.CHAARI, K.DRIRA, C.CHASSOT
OLC
Rapport LAAS N°08687, Janvier 2009, 42p.
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Mots-Clés / Keywords
Multi-level adaptation; Graph grammars; Ontologies; Collaboative mobile systems;
Towards a collaborative congestion control based on TFRC
F.ARMANDO, N.VAN WAMBEKE, C.CHASSOT
OLC
Manifestation avec acte : World Congress on Engineering and Computer Science (WCECS 2008), San Francisco (USA), 22-24 Octobre 2008, pp.348-353 , N° 08323
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Mots-Clés / Keywords
Congestion control; Cooperative activities;
Implementing a rule-driven approach for architectural self configuration in collaborative activities using a graph rewriting formalism
I.BOUASSIDA, K.GUENNOUN, K.DRIRA, C.CHASSOT, M.JMAIEL
OLC, ReDCAD Laboratory
Manifestation avec acte : 5th International Conference on Soft Computing as Transdisciplinary Science and Technology (CSTST'2008), Cergy Pontoise (France), 28-31 Octobre 2008, pp.484-491 , N° 08467
Lien : http://hal.archives-ouvertes.fr/hal-00345089/fr/
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Abstract
Architectural adaptation is important for handling self- configuring properties of autonomic distributed systems. It can be achieved by model-based management of dynamic architectures. Describing dynamic architectures includes defining rules for reconfiguration management. Within this research context, several works have been conducted using formal specification to handle this complexity. Graph and graph rewriting-based approaches showed, through many studies, their appropriateness to tackle architectural adaptation problems. However, scalability of such approaches remains an open issue and has been rarely explored. In this paper, we investigate this issue. We introduce a graph-based general approach for handling of dynamic architectures, and we illustrate it within a scenario of collaboration support in Crisis Management Systems. We elaborate the formal models for dynamic architecture management. Using the French Grid GRID5000, we conducted an experimental study to assess the scalability of the elaborated models.
Mots-Clés / Keywords
Autonomic computing; Rule-driven; Graph rewriting;
Towards the use of models for autonomic network management
N.VAN WAMBEKE, F.ARMANDO, K.GUENNOUN, K.DRIRA, E.EXPOSITO, C.CHASSOT
OLC
Manifestation avec acte : IFIP Joint Conference on Personal Wireless Communications (PWC'2008), Toulouse (France), 30 Septembre - 2 Octobre 2008, pp.459-470 , N° 07534
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Mots-Clés / Keywords
Autonomic network management; Model-based decision; Context adaptation; Collaborative networking;