Makhlouf Derdour

An adaptation platform for multimedia applications CSC (Component, Service, Connector )

The trend toward ubiquitous services and any multimedia, the proliferation of mobile devices and the widespread use of wireless networks imply changes in the design, the implementation and the execution of software applications. Ubiquitous systems are dynamic systems that change their behavior according to users needs and hardware capabilities at runtime. As it is not desirable to develop these systems from scratch every time, a specific software architecture providing opportunities for dynamic adaptation of systems is necessary. It must be able to create adaptations at runtime in order to provide a dynamic and adaptive behavior for users according to the evolving context. In this paper we present a supervised adaptation platform for applications based components. The CSC platform (Component, Service and Connector) is based on a component/service model that allows adaptation of component-based applications and use service-oriented architecture for providing adaptation services to be embedded in adaptation connectors.

MMSA: metamodel multimedia software architecture

Interoperability explains how two or more systems or components exchange and process information. The heterogeneity communication mechanisms of the components (GPRS, WIFI, Bluetooth, ZigBee, etc.), transmission speed, as well as the variety of the media (sound, video, text, and image) they manage have a strong influence on the interoperability. That requires the management of the adaptation to an abstract level in order to avoid ad hoc nonreusable, and/or generalizable solutions. In this paper we propose a metamodel for architectures with heterogeneous multimedia components. It enables the description of the software architectures as a collection of components manipulating various types and formats of data, and interacting between them via specific adaptation connectors.

UML-profile for multimedia software architectures

Multimedia technology is increasingly being used to create reliable and effective communication environments. However, the design of multimedia applications is currently driven more by intuition than by empirically or theoretically derived design guidelines. In a multimedia application, the software architecture is defined as a set of components manipulating various multimedia data types with specific constraints that we must take into consideration at the architectural design. For instance, the problem of heterogeneity related to the exchanged of multimedia data flows. In the absence of prescriptive architectural design principles, meta-model for multimedia software architecture (MMSA) enables the description of software architectures expressing a multimedia software system as a collection of components which handle various types and formats of multimedia data, and interacts between them via adaptation connectors. This paper proposes a modelling of architectural elements such as: multimedia, application components, communication, etc. and an UML profile for verification and validation of MMSA architectures and detection of heterogeneities between components communicating with multimedia flows.

An Adaptation Approach for Component-Based Software Architecture

In this paper we propose a meta-model for architectures with heterogeneous multimedia components. Currently, a generic solution does not exist to automatically deploy a distributed architecture based on multimedia components. The description of the incompatibilities between components is a need in such approaches. Indeed, software architectures validate the functional aspects, which are not sufficient to guarantee a realistic assembly. For instance, the problem of heterogeneity related to the exchanged data flows. In order to highlight these incompatibilities and to find solutions, a model-based approach called MMSA (Meta-model Multimedia Software Architecture) is proposed. It enables the description of the software architectures expressing a software system as a collection of components which handle various types and formats of data, and interacts between them via connectors including the adaptation connectors.

A New Two-Layered Architecture for Efficient Situations Management in Smart Environments

In the field of smart environments, many devices and multimedia oriented connected objects has gained a significant attention in the last years. In such a domain, there is a large number of heterogeneous specific profiles (user devices, connected objects, smart homes, health sensors...). These profiles are highly dynamic, according to different contexts (user profile, user environment, monitoring, social activities...). There is a critical need to offer to users a flexible and efficient services selection among a large set of candidates based on their surrounding environments, users current needs and situations. In this paper, we propose a two layered architecture including a local server (Fog computing), a central Cloud providing an efficient situation management and good scalability. We particularly focus on context-aware e-health mobile applications for achieving the efficient and quality diagnosis of complex situations and for providing all distributed multimedia services that help users to access/broadcast multimedia documents.

Security architecture metamodel for Model Driven security

Abstract A key aspect of the design of any software system is its architecture. One issue for perpetually designing good and robust architectures is the new security concepts. Many new applications are running on powerful platforms that have ample rich architecture models to support multiples security techniques and to explicit several security constraints. The design of an architecture meta-model that considers security connectors is required in order to ensure a realistic secure assembly and to address the problems of vulnerability of exchanging data flow. Our research proposes a generic meta-modelling approach called SMSA (Security Meta-model for Software Architecture) for describing a software system as a collection of components that interact through security connectors. SMSA metamodel is modeled as a UML SMSA profile. We exploit UML powerful capacities (meta-models and models) to define security concepts of SMSA (e.g. security connectors, composite and domain). A major benefit of UML profile is to the faithful representation of connectors to support the definition of security connector types explicitly and to support them with the ability to associate semantic properties. We also provide a set of model transformations to fit security requirements of a system. These transformations are detailed and validated with phosphate support system (SAGE) for the company FERPHOS: a case study described in SMSA. The model is tested and validated with the semantic constraints defined by the profile using Eclipse 3.1 plug-in in this case study.