Constellation, le dépôt institutionnel de l'Université du Québec à Chicoutimi

Résumé

Fifteen years ago, several works tried to establish the IEEE 802.15.3 version of ultra-wideband (UWB) like a wireless alternative to the USB, the HDMI, and the Bluetooth, but their efforts failed to gain traction. As UWB technology re-emerges as a suitable solution for the Internet of Things (IoT), we consider the use of this technology for e-health applications. The dynamic channel coding (DCC-MAC) protocol was designed for very low radiated power UWB ad-hoc networks based on dynamic channel coding with interference mitigation. This protocol combines the physical and the MAC layer where the main idea is to optimize the rate by allowing interfering sources to transmit if they are outside the exclusion region. In this paper, the existing DCC-MAC protocol is modified by introducing node energy consumption with simultaneously switching the power level between the nodes. We use a joint consideration of physical and multiple access layers to minimize the energy consumption of the network, and hence increasing its lifetime.