Projet de recherche doctoral numero :4273


Date depot: 1 janvier 1900
Titre: Optimal Design of Wireless Body Area Networks for improving the Quality of Life
Directeur de thèse: Ahmed MEHAOUA (Centre Borelli (ED STIC))
Domaine scientifique: Sciences et technologies de l'information et de la communication
Thématique CNRS : Non defini

Resumé: Wireless Body Area Networks (WBANs) represent one of the most promising approaches for improving the quality of life, allowing remote patient monitoring and other healthcare and medicine applications. In general, a WBAN comprises a set of sensor/actuator nodes, which have to be very simple, cheap and energy efficient, and a sink node. Sensor nodes are usually placed in the clothes, on the body or under the skin; they monitor continuously human’s physiological activities and actions, and send such information through multi-hop wireless paths to the sink (e.g., a personal device), in order to be processed or relayed to other networks. Furthermore, special devices, called relay node or relays, can be added to the WBAN (using wearable suites or shorts) to collect all the information from sensors and send it to the sink, thus improving the WBAN lifetime and reducing at the same time the overall time necessary to deliver medical data. The deployment of the WBAN is an important issue that impacts the network lifetime. In general, biosensors have pre-determined positions; therefore, it is imperative to optimize the number and positions of relay nodes, along with the traffic routing, to improve the network lifetime while minimizing at the same time the WBAN installation cost, which includes the sensors and relay nodes’ installation cost. Therefore, as a key innovative feature, in this thesis the PhD student will investigate the joint problem of positioning the relay nodes and designing the wireless mesh network that interconnects them. More specifically, she/he will first propose novel and effective mathematical (e.g., integer linear programming) formulations of the WBAN topology design problem, which minimize the network installation cost while taking accurate account of energetic issues as well as topology changes due to person mobility. The proposed models will determine (1) the optimal number and placement of relay nodes, (2) the optimal assignment of sensors to relays, as well as (3) the optimal traffic routing. Then, the PhD student will evaluate the performance of the proposed models and approximate algorithms through extensive numerical simulations and real case studies.

Doctorant.e: Vallois Valentin