Online Estimation of Battery Lifetime for Wireless Sensors Network

Battery is a major hardware component of wireless sensor networks. Most of them have no power supply and are generally deployed for a long time. Researches have been done on battery physical model and their adaptation for sensors. We present an implementation on a real sensor operating system and how architectural constraints have been assumed. Experiments have been made in order to test the impact of some parameter, as the application throughput, on the battery lifetime

ENERGY EFFICIENT ADAPTIVE BROADCASTING SCHEME FOR WIRELESS SENSOR NETWORKS

ABSTRACT Energy-efficiency is a critical issue in wireless sensor networks (WSNs), since sensors are battery operated with limited life time. Energy efficient broadcasting will have a direct impact on network lifetime. Since the minimum energy broadcasting schemes are affected by broadcast storm problem, it has to be addressed to improve the energy efficiency. To overcome the broadcast storm problem, probabilistic schemes have been proposed in the literature to make a rebroadcast decision. However, the random assessment delay (RAD) in probabilistic broadcasting schemes results in poor reachability and increased end to end delay in the congested networks. In the proposed work, the probabilistic scheme adapts its RAD based on network congestion level. The simulation results reveals that the new scheme outperforms the existing schemes in term of saved-rebroadcast, packet delivery and routing overhead

Online Estimation of Battery Lifetime for Wireless Sensor Network

Battery is a major hardware component of wireless sensor networks. Most of them have no power supply and are generally deployed for a long time. Researches have been done on battery physical model and their adaptation for sensors. We present an implementation on a real sensor operating system and how architectural constraints have been assumed. Experiments have been made in order to test the impact of some parameter, as the application throughput, on the battery lifetime.La batterie est un composant matériel majeur dans les réseaux de capteurs sans fil. Des recherches ont été menées sur les modèles physique des batteries et leur adaptation pour les capteurs. Nous présentons une implantation sur un véritable système d'exploitation de capteurs et comment les contraintes d'architecture ont pu être pris en compte. Des expériences ont ensuite été menées pour tester l'influence de certains paramètres comme le débit d'application sur la durée de vie des batterie

Effective data routing using mobile sinks in disjoint mobile wireless sensor networks

In Mobile WSNs (MWSNs), disjoint clusters could be naturally formed in an unpredictable way that possess the nature of highly dynamic connected and disconnected schema. Many partitions of the network could happen in disjoint mobile wireless sensor networks (DMWSNs), and could last for a significant amount of time that can challenge current routing protocols in crisis-driven and geography-driven applications. We propose in this paper, two new centralized and distributed routing discovery protocols for DMWSN. In the centralized protocol, the static sink controls the motion of mobile sinks. In the distributed protocol, each mobile sink is responsible for collecting data in a specific region. In our work, the mobile sinks need to coordinate among themselves for communication with the base station (BS). The simulation results shows the advantage of our newly proposed protocols in terms of time delay, energy consumed, and the delivery ratio