Research Topics
My main fields of interest are concentrated on deployment and management of adaptive distributed applications.In fact,improving information propagation in distributed systems is an important concern of publish/subscribe systems especially when deployed on mobile ad-hoc networks.These networks are characterized with dynamic topology, limited bandwidth, strong constraints on energy, limited physical security and lack of infrastructure. In this context, it’s imperative to maintain good quality of service and react before failure. Our goal is first to optimize the overall performance of the system by ensuring desired QoS, then to ensure information delivery to consumers in case of dispatcher or link failures. In our work, we overcome the above mentioned problems by suggesting a global autonomic architecture to support adaptation and self-organization of publish/subscribe system built on MANET. Thus, we focus on providing a decentralized approach for P/S system self-adaptativity ensuring both message delivery and QoS requirements. Our system is based on the self-adaptativity process forming a fully autonomic loop that maps to the monitor, analyze, plan and execute control loop. Thus, the system has to monitor itself, to detect QoS degradation or predict a failure, to look for a solution and finally to execute it. The approach embodied in our architecture reasons locally by creating an autonomic component in each node, responsible for local adaptation in case of QoS degradation. Then, we extend the local adaptation scope by considering cooperative issues by interacting the different models encapsulated in nodes in order to ensure the global desired QoS.

Master's thesis
QoS aware publish/subscribe system deployed on a mobile ad hoc network

Publications

International Journals Articles
I. Lahyani, S. Marzouk, and M Jmaiel. Qos aware publish/subscribe system deployed on a mobile ad-hoc network. Communications of SIWN - The Systemics and Informatics World Network, 7:84-90, 2009. [ BibTeX   ]

Educational activities

Teaching assistant
National School of Engineers of Sfax
Department of the Computer Science and Applied Mathematics (DGIMA)
University of Sfax-Tunisia