50documents trouvés
Dynamic redeployment of components for M2M communication
I.BOUASSIDA, A.KAMOUN, S.TAZI, T.VILLEMUR, K.DRIRA
SARA
Rapport LAAS N°12558, Octobre 2012, 28p.
Diffusable
128244A graph grammar-based dynamic reconfiguration for virtualized web service-based composite architectures
I.BOUASSIDA, R.BEN HALIMA, K.DRIRA, C.CHASSOT, M.JMAIEL
ReDCAD Laboratory, SARA
Ouvrage (contribution) : Business System Management and Engineering, Ardagna, C.A.; Damiani, E.; Maciaszek, L.A.; Missikoff, M.; Parkin, M. (Eds.), Lecture Notes in Computer Science, Vol. 7350, Springer, 197p., N°ISBN 978-3-642-32438-3, Septembre 2012, pp.181-196 , N° 11170
Diffusable
128071Context classification and context analysis approach for collaborative ubiquitous systems
N.KHABOU, I.BOUASSIDA, M.JMAIEL
ReDCAD Laboratory, SARA
Rapport LAAS N°12490, Septembre 2012, 8p.
Lien : http://hal.archives-ouvertes.fr/hal-00704197
Diffusable
Plus d'informations
Abstract
Taking advantage of contextual information is very important for context aware applications especially in a mobile collaborative environment. This kind of applications adapt their behavior (self-adaptability property) according to the user needs, the available resources and the surrounding environment. This property is enforced by four phases; monitoring the application and its environment, analyzing context changes, planning adaptation actions and executing the planned actions to respond to context changes. In this paper, we focus and discuss the second phase. First, we propose a novel context classification which covers almost all of the context aspects. Then, we propose an analysis approach for collaborative ubiquitous systems. Our approach relies on different kinds of thresholds. Once relevant context changes occur, the context aware application will be notified to trigger its suitable process dynamically in order to deal with the changes.
Towards self healing publish/subscribe system on MANET
I.LAHYANI, I.BOUASSIDA, M.JMAIEL, C.CHASSOT
ReDCAD Laboratory, SARA
Manifestation avec acte : International Conference on Collaboration Technologies and Infrastructures (IEEE WETICE 2012), Toulouse (France), 25-27 Juin 2012, pp.385-390 , N° 12222
Lien : http://hal.archives-ouvertes.fr/hal-00691327
Diffusable
Plus d'informations
Abstract
This paper presents a novel approach for Quality of Service aware publish/subscribe systems on Mobile Ad-hoc Network. Crisis management application seems to be a relevant case study to our approach. On the one hand, our proposed solution monitor the system and analyzes his state towards predicting Quality of Service degradations. Real time prediction is based on the Auto Regressive Integrated Moving Average Formula. On the other hand, our solution defines new reconfiguration actions to be applied once Quality of Service degradation are predicted. In order to evaluate the proposed reparation actions, we define a protocol describing different transformation rules for adaptation using graphs and graph grammar. The Graph Matching and Transformation Engine (GMTE) is used to apply rules to the publish/subscribe system.
Towards a novel analysis approach for collaborative ubiquitous systems
N.KHABOU, I.BOUASSIDA
ReDCAD Laboratory, SARA
Manifestation avec acte : International Conference on Collaboration Technologies and Infrastructures (IEEE WETICE 2012), Toulouse (France), 25-27 Juin 2012, pp.30-35 , N° 12219
Lien : http://hal.archives-ouvertes.fr/hal-00689727
Diffusable
Plus d'informations
Abstract
In ubiquitous computing systems, applications must be able to respond to dynamic context changes in order to maintain collaboration between entities. A promising solution consists of developing context aware applications which automatically change their behavior according to the user needs, the available resources and the surrounding environment. Furthermore, a context aware application is characterized by a closed feed back loop with four phases: Monitoring, Analysis, Planning and Execution. In this paper, we focus on the second phase and we propose an analysis approach of collaborative ubiquitous systems which aims at analyzing context information and detecting significant abnormal changes. The proposed approach relies on thresholds in order to track down context changes. Once relevant context changes occur, the context aware application will be notified to trigger its suitable process dynamically in order to deal with the changes.
Caractérisation de la reconfiguration dynamique des architectures logicielles par les grammaires de graphe
C.EICHLER, I.BOUASSIDA, K.DRIRA, T.MONTEIL, P.STOLF
SARA, ReDCAD Laboratory, IRIT-UPS
Manifestation avec acte : Conférence francophone sur les Architectures Logicielles (CAL 2012), Montpellier (France), 29-31 Mai 2012, pp.58-68 , N° 12078
Diffusable
127543Model-based provisioning and management of adaptive distributed communication in mobile cooperative systems
S.RAMANATHAN, I.BOUASSIDA, K.DRIRA, C.CHASSOT, S.MICHELLE, T.DESPRATS
SARA, IRIT-UPS
Rapport LAAS N°12189, Avril 2012, 102p.
Non diffusable
127008A model driven approach for automated design of context-aware autonomic architectures
E.MEZGHANI, R.BEN HALIMA, I.BOUASSIDA, K.DRIRA
SARA, ReDCAD Laboratory
Rapport LAAS N°12123, Mars 2012, 12p.
Lien : http://hal.archives-ouvertes.fr/hal-00675352
Diffusable
Plus d'informations
Abstract
In this paper, we propose a model driven approach automating the design of autonomic systems. We handle non-functional properties with a focus on managing QoS degradation for cooperative M2M applications such as health care. Nowadays, service delivery becomes close to end-users such as M2M applications, which are being incorporated into the existing infrastructure. The Remote Health Care System and specialized sensors for in-home patient monitoring are at the current forefront of new technologies. While there are benefits from technologies such as reducing costs and medical errors, associated architecture and communication infrastructure have to ensure care continuity and quality of service (QoS). In this paper, we propose a model driven approach which enables the generation of autonomic architecture from high level functional and non-functional requirements. Our work instantiates the Model Driven Architecture (MDA) approach. We elaborate formal rules using graph grammars to transform a high level functional requirements to an autonomic architecture implemented under GMTE, a Graph Matching tool. We generate a Service Component Architecture (SCA) at the MDA low level (PSM) to implement the architecture in different technologies such as EJB, JMS, SOAP, etc. The Remote Health Care System shows the feasibility and the efficiency of our approach.
Ontology-based support for reconfigurable adaptive group communication architecture
I.BOUASSIDA, A.KAMOUN, S.RAMANATHAN, K.DRIRA
SARA
Rapport LAAS N°12124, Mars 2012, 16p.
Lien : http://hal.archives-ouvertes.fr/hal-00674843
Diffusable
Plus d'informations
Abstract
In collaborative communication, adaptation is required to maintain the reliable connection. Within the framework of a wireless environment, it is very challenging for the host entities to handle a sudden/unexpected change in communication and available resources. This issue is addressed in the context of save and rescue missions carried out during natural disasters such as floods and forest fires by human and voluntary operators aided by ground mobile devices and autonomous robots. This paper proposes a multi level architecture that supports reconfigurable adaptive group communications using semantic model. Modeling follows the well-known SWRL (Semantic Web Rule Language) instructions which establish the degree of importance of each communication link or component. Adaptation is then achieved through initializing between various configurations and for a given entity, the latter is modified as need be. Providing generic and scalable solutions for automated self-reconfiguration is driven by rule-based reconfiguration policies using ontologies. Finally, we illustrate constraints capable of meeting evolving requirements and the solutions followed by implementation of this scenario.
Generic approach for graph-based description of dynamically reconfigurable architectures
C.EICHLER, I.BOUASSIDA, T.MONTEIL, P.STOLF, K.DRIRA
IRIT-UPS, SARA
Rapport LAAS N°12071, Mars 2012, 21p.
Lien : http://hal.archives-ouvertes.fr/hal-00674092
Diffusable
Plus d'informations
Abstract
Architectural adaptation is studied for handling adaptation in autonomic distributed systems. It is achieved by implementing a model-based approach for managing reconfiguration of dynamic architectures. Describing such architectures includes defining rules for describing both architectural styles and theirs reconfiguration mechanisms. Within this research context, the work presented in this paper is conducted using formal specification based on graphs and graph rewriting appropriately for tackling architectural adaptation problems. A graph-based general approach for describing architectures and handling their dynamic reconfiguration is introduced. Our approach is illustrated in the context of a distributed hierarchical application. The formal models that allow the generation of a graph grammar for dynamic architecture description and the automatic definition of transformation rules for achieving intern self-protecting during the adaptation are elaborated.