Wireless sensor and actuator networks are comprised of embedded systems with sensing,
actuation, computation, and wireless communication capabilities. Their untethered character …

The IEEE 802.15. 4 and RPL standards are commonly used for MAC and routing in wireless
sensor networks, respectively. In single-hop networks, duty cycling is supported by the …

Nowadays, wireless sensor networks (WSNs) are used in several applications such as
environmental monitoring. When network size and data rate increase, congestion becomes …

In wireless sensor networks, there is usually a sink which gathers data from the battery-
powered sensor nodes. As sensor nodes around the sink consume their energy faster than …

Nodes in wireless sensor networks are generally confined in the energy budget available for
their operation, hence energy-aware application design is mandatory to achieve long node …

La tendance actuelle des réseaux de capteurs sans fil est d'avoir un seul réseau supportant
plusieurs applications et fournissant plusieurs QoS. Dans cette thèse, nous étudions les …

Most wireless sensor networks are used for monitoring purposes, where some nodes sense
the environment and forward their measurements to an entity called the sink. Nodes around …

Wireless sensor networks (WSNs) can address the needs of many monitoring applications,
due to their low cost, wireless capabilities and ease of deployment. However, applications …

Les réseaux de capteurs sans fil permettent de répondre aux besoins de nombreuses
applications de surveillance, en raison de leur faible coût, de leur capacité à communiquer …