International Conference Papers

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Author: search.filters.author.Drias, Habiba

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    A Communication model of distributed information sources bacteria colonies inspired
    (IEEE, 2006) Mellah, Hakima; Hassas, Salima; Drias, Habiba
    The implementation of communication organizational strategies constitutes an essential performance factor. Nowadays, the organization becomes companies competitiveness element (organizational structures), networks, knowledge and competences management, and cooperation. This, to be better reactive to ensure the competing character, to support better new information technologies, concerning the data exchange inside as outside an organization. The information systems specification gives a partial description of the organization, which integrated with other descriptions is regarded as being the organization model. Using the abstraction level of an information system (information source) was proven to be not sufficient to face the conflicts confronted by the organizations. These conflicts are the improvement and the change with an aim of adapting constantly to the environment new requirements. These latter are essential to support the dynamic character which tends to characterize the current organizations and which is often nature taken. In order to implement this dynamism, we took as a starting point the biological sciences and more particularly the bacteria colonies. This paper presents a correspondence model between a communication system of distributed information sources and a bacteria colony
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    A two-phase commit protocol for mobile wireless environment
    (ACM, 2005) Nouali-Taboudjemat, Nadia; Doucet, Anne; Drias, Habiba
    The challenges of wireless and mobile computing environments have attracted the attention of researchers to revisit the conventional implementation of distributed computing paradigms. In this paper we propose to revisit the conventional implementation of the Two Phase Commit (2PC) protocol which is a fundamental asset of transactional technology for ensuring the consistent commitment of distributed transactions. We propose a new execution framework providing an efficient extension that is aware of the mobility. The proposed M2PC (Mobile 2PC) protocol preserves the 2PC principle and the freedom of the mobile clients and servers while it minimizes the impact of unreliable wireless communications.
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    A policy-based context-aware approach for the commitment of mobile transactions
    (ACM, 2008) Nouali-Taboudjemat, Nadia; Drias, Habiba
    The transaction paradigm ensures consistency in the presence of concurrent accesses to shared data and in the presence of failures. Traditionally, the transaction semantics is defined by the ACID properties (Atomicity, Consistency, Isolation and Durability) which implementation is through such mechanisms as commitment protocols ensuring Atomicity and concurrency control protocols ensuring Isolation. Many transactional models were developed to support the diverse and variable applications needs, and more recently to overcome the constraints induced by the evolution of distributed systems environments toward wireless and mobile. Indeed, the latter are characterized by limitations in computing resources, communications and energy as well as dynamic variations in terms of resource availability and configuration. In this paper, our contribution is mainly focused on the problem of atomic commitment. We adopted an approach based on the context-aware adaptation for the management of mobile transactions. We therefore present the commit protocol aTCP (Adaptable Transaction Commit Protocol) which allows for adaptation to the requirements of applications and mobile context in terms of transactional properties and execution cost. For the implementation of aTCP we offer a context-aware architecture based on policies.