Abstract
The severe power limitations of machine-to-machine (M2M) devices challenge their access connectivity and reliable communication over cellular networks. In this work, we propose a new solution to reduce the power consumption of M2M over cellular by minimizing the power dissipated during inactive intervals. When the M2M device has no data to transmit, it will turn its main circuitry off and switch to a new deep sleep mode. The transition back to the active mode is only achieved upon receiving a radio frequency (RF) wake-up signal from the device's serving base station (BS). We use stochastic geometry to analyze the performance of the proposed wake-up solution. In the proposed model, the M2M device leaves the deep sleep mode when it receives enough power to be activated. The device experiences a successful wake-up event when the total received power includes a wake-up signal transmitted from its serving base station. On the other hand, the device experiences a false wake-up event when it wakes up due to received power from neighboring base station excluding the serving base station. The performance of the proposed model is evaluated in terms of the probabilities of these two events. We use Poisson point processes (PPPs) to derive tractable expressions for the performance metrics, and we present insights for network design and optimization.