Rania HAJ MANSOUR : "Energy efficiency and coverage quality management for wireless sensor networks"

Abstract : In recent years, wireless sensor networks (WSNs) are widely used in various applications areas such as military, environmental, home automation, medical, etc. They consist of a large number of nodes deployed to cover, collect, process and transmit environmental data to one or more sinks. These nodes are generally considered homogeneous with the same characteristics. However, a network may have different specifications, such as different computing power, different battery life, different sensing and communication ranges. In particular, the initial battery energy level and energy consumption may vary from one sensor to another. Some very sensitive applications require the complete coverage of all the targets during the whole lifetime of the network, others can
bear less strict monitoring. For instance, since the probability of a forest fire occurring in the rainy season is lower than in the dry season, monitoring at each time period a few random regions in the forest could be sufficient to prevent the forest from taking fire. This is called partial coverage. Unfortunately, despite the diversity of applications of sensor networks, their success depends on their lifetime. Indeed, sensor nodes are highly dependent on energy consumption due to their very small size and the deployment environment. This thesis mainly focuses on energy consumption as well as coverage quality in order to improve the quality of service of heterogeneous wireless sensor networks (HWSN). To do so, centralized approaches (optimization models and resolution heuristics for these different cases: heterogeneity, partial coverage, connectivity) have been studied to orchestrate the trade-off between energy saving and coverage optimization.

Jury Composition :

Mme Karine DESCHINKEL Maîtresse de conférences  Université Bourgogne Franche - Comté - PhD Director
M. Mourad HAKEM Maître de conférences Université Bourgogne Franche- Comté  - PhD Co-supervisor
M. Lhassane IDOUMGHAR Full professor Université de Haute-Alsace - Reporter
M. Jalel BEN-OTHMAN Full professor Université Paris 13 - Reporter

Localization : Amphithéâtre 3 - IUT Belfort-Montbéliard 9, Avenue du Maréchal Juin - Département Génie Civil - 900016 BELFORT