In this work, we consider the behavior of a wireless ad- hoc network under TwoRayGround and Shadowing radio models. By means of simulations, we analyze the performance of three routing protocols: AODV, DSR, and DSDV, and study the global energy depletion inside the network. We found that the energy consumption due to AODV and DSR can be very different with respect to the radio model. In particular, we found a maximum relative difference of 70%. On the other hand, for the proactive DSDV routing protocol the energy consumption rate seems to be independent of the radio model, at least for moderate size of the network (256 nodes). Therefore, for small networks, although proactive protocols offer a great advantage in term of delay, the energy consumption is independent against link failures due to the irregularity of the radio medium.

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