| The fourth-generation mobile communication technology(4G)provides high speed data transmission capabilities which promote the development of mobile devices such as smartphones.However,the low energy efficiency of 4G communication often results in a short battery life of smartphone which hinders the development of mobile applications.It is important to analyze the energy consumption of 4G communication and propose feasible optimization schemes to improve the energy efficiency of 4G networks.This thesis designs an energy estimation model of smartphone based on the RRC state machine to elaborate the energy consumption process of 4G communication.Moreover,we compare the energy consumption of 4G,3G and WIFI by experiments,and propose a feasible scheme to save the energy consumption of 4G communication inspired by experimental results.Our contributions are summarized as following.(1)Introduce the related works about the energy consumption and optimization schemes of 4G network communication.(2)Propose an energy estimation model for 4G communication based on the RRC state machine,which obtains the energy consumption in transmission states.(3)Based on the Android platform,we carry out experiments on various customized and open-source applications and analyze their energy consumption using the energy estimation model under 4G environment.(4)Find the key time parameters of in 4G protocol which have great impact on the energy consumption of 4G communication,such as DRX cycle,inactive timer,etc.Then this thesis raises two feasible schemes to improve 4G energy efficiency.Our energy estimation model of 4G communication based on RRC state machine has been validated by a series experiments.Experimental results have shown that this model accurately estimates the energy consumption process of 4G communication,whose accuracy rate is up to 93%.And two proposed optimization schemes of energy consumption effectively reduce the energy consumption of Android smartphone under 4G communication environments. |
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