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For wireless mobile Internet users the length of the battery life is one of the most important performance factors. The energy efficiency of the data transmission over radio is a key component affecting the battery lifetime. This paper investigates WLAN energy consumption in network communication on a Mobile handset. The paper introduces an energy model that allows analysis and simulation of the energy efficiency of the Internet protocols on a Wireless Network Interface, and has extended the NS-2 simulation platform to allow investigating the energy consumption of the Radio Modem and the Power Amplifier in WLAN 802.11g network interface of a mobile device. The paper has also validated the model against measurements on real wireless hardware, and show that the simulation results closely match the real world behavior.
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