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One of the main challenges when designing a new self-powered wireless sensornetwork (WSN) technology is the vast operational dependence on its scarceenergy resources. Therefore, a thorough identification and characterisation ofthe main energy consumption processes may lay the foundation for developingfurther mechanisms aimed to make a more efficient use of devices' batteries.This paper provides an energy consumption model for IEEE 802.11ah WLANsoperating in power saving mode, which are expected to become one of thetechnology drivers in the development of the Internet of Things (IoT) in thenext years. Given the network characteristics, the presented analytical modelis able to provide an estimation of the average energy consumed by a station aswell as to predict its battery lifetime. Once the model has been validated, weuse it to obtain the optimal IEEE 802.11ah power saving parameters in severalIoT key scenarios, validating that the parameters provided by the IEEE 802.11ahTask Group are already a very good choice.

An Energy Consumption Model for IEEE 802.11ah WLANs