Wireless Sensor Network node global energy consumption modeling

This paper deals with global power consumption modeling dedicated to Wireless Sensor Network (WSN) nodes. After having introduced various existing approaches for the energy modeling, our choices and experiments using the Ns-2 simulator and the iMote2 hardware platform (over an IEEE 802.15.4 protocol) are presented. First results show that Ns-2 simulator provides RF energy consumption metrics very close to values measured on the real platform for the same experimental conditions. An extension of Ns-2 for processor energy model is also discussed. Finally, considering different use cases for an audio transfer over a ZigBee network, it is shown the need for a global approach for optimizing power consumption.