Advancements in renewable energy sources, such as solar, thermal or wind, are increasing the attention in autonomous Wireless Sensor Networks (WSN). Everlasting energy harvesting allows long-term operations of wireless nodes, which can extremely reduce the cost of battery charging or replacement. Moreover, it has opened a new paradigm for designing Power Managers in self-powered autonomous nodes. Instead of minimizing the consumed energy to maximize the system lifetime as in battery-powered nodes, the PM dynamically adapts the consumed energy according to the fluctuations of the harvested energy, leading to Energy Neutral Operation (ENO).
The GRANIT team activities in EH-WSN aim at designing and implementing new PM able to deal with the environment constraints and ensure ENO by tuning processing and communicating parameters such as
- Radio activity (wake-up interval of nodes)
- Radio transmission power
- Computation/radio trade-off…