Real-Time Scheduling for Energy Harvesting Sensors

Maryline Chetto (1) , Hussein El Ghor (1) , Rafic Hage Chehade (2)

1 IRCCyN - Institut de Recherche en Communications et en Cybernétique de Nantes
2 LU / ULB - الجامعة اللبنانية [بيروت] = Lebanese University [Beirut] = Université libanaise [Beyrouth]

Energy harvesting is the conversion of ambient energy into electricity to power small devices such as wireless sensors, making them self-sufficient. The electrical energy used to power them is variable over time and limited by the capacity of the energy storage (battery or ultra-capacitor). In general, these embedded devices have to adhere to real-time constraints expressed in terms of deadlines. In this paper, we present power management and scheduling solutions for energy harvesting systems having real-time constraints such as most of wireless sensors. We show how to answer questions like the following: When should the system use energy? When should it be idle and recharge the energy storage? We review the main properties of a scheduler known as Earliest Deadline with Energy Guarantee (EDeg) and we report results of an experimental study.

Mots clés: real-time; scheduling; energy harvesting

Domaines: Systèmes embarqués

Maryline Chetto, Hussein El Ghor, Rafic Hage Chehade. Real-Time Scheduling for Energy Harvesting Sensors. The 6th International Conference for Internet Technology and Secured Transactions, Dec 2011, Abu Dhabi, United Arab Emirates. pp.396. ⟨hal-00691222⟩