Intelligent Security Management and Control in the IoT

6Adapting Quality of Service of Energy-Harvesting IoT Devices

Matthieu GAUTIER and Olivier BERDER

IRISA, CNRS, University of Rennes 1, Lannion, France

Wireless sensor networks (WSNs) are made up of multiple wireless sensor network nodes that monitor an environment and collect data into one or more locations called sinks. These networks are a key technology in the Internet of Things (IoT) and are essential in many applications such as smart cities, smart factories or precision agriculture. Unlike cellular networks or IEEE 802.11 which rely on a fixed infrastructure, many network topologies are possible for organizing nodes, the simplest being the star network in which all the nodes are located at a distance of one hop from a sink and so send their data into it directly. In the case where the surveillance area is large and where some of the sensor nodes are too distant from the sink for a one-hop communication, a multi-hop network is used.

To deploy large WSNs, one important point is the cost of the nodes, which should be kept low. In addition, so that more applications can be useful WSN should be able to operate over a long period and, generally, the stumbling point of this type of application is energy. Indeed, traditional wireless nodes are supplied by individual batteries, which can only store a limited quantity of energy. The energy consumption of one node, which is directly linked to the Quality of Service (QoS) (detection rate, flow, etc.), is classically defined at deployment ...