Event inter-arrival time weighted activation policies for rechargeable wireless sensors

Rechargeable wireless sensors can harvest energy from the environment and monitor interesting events perpetually. Yet the energy harvesting rate on average is much smaller than the energy consumption rate at which the sensor uninterruptedly runs. Hence, the sensor should activate itself only at time slots where the interesting event would occur highly probabilistically. This paper considers the renewal process for event occurrence, and formulates event inter-arrival time weighted activation problem. This problem is resolved by linear programming technique. Finally, we present numerical evaluation results of the derived weighted activation policy under a series of concrete event occurrence distributions as well as weight distributions.