Low Power Design And Implementation Of The Android Smartphone

In recent years,due to the mobile Internet technology and mobile communication technology development,the popularity of Android smartphones also got rapid,in the global market share has exceeded 75%,Android total number of users has exceeded the Windows operating system,one of the most popular with the users of the operatin g system,but insufficient battery life is a big drawback of the Android system.Due to escalating smartphone hardware,function and usage scenario is also more abundant,c ause the system power consumption is also increasing,but the smartphone battery cap acity growth is very limited,how to use low-power system design reduce the power c onsumption of the smart phone is a problem worthy of studying.Paper based on qualcomm MSM8953 chip hardware platform and Android softwar e platform for low-power system design and implementation,through the wake lock m anagement,clear background,network management and power saving mode of four ke y modules,in does not affect the normal use of users with experience under the prem ise of system monitoring and management,timely release of the CPU resources,make the system would be able to in your spare time into low power mode,so as to redu ce the power consumption of the system to achieve the purpose of energy saving.The primary work in this thesis are presented as follows:1)through the study of the management of Android wake lock,in does not affec t the normal use under the premise of user timely release PARTIAL_WAKE_LOCK ty pe wake locks,avoid system not to sleep in time and cause additional power consum ption.2)is the purpose of the background process cleaning process of abnormal CPU in the background,in order to avoid the high frequency operation of the CPU has bee n caused by the unnecessary power consumption.3)the application of network management is based on set up iptables,prohibited without the user allows the application to screen state connected to the Internet,but i n the bright screen to restore the application under network access,which does not af fect the normal use of the user.4)the power saving mode to provide users with an extreme save electricity syste m,in power saving mode will be closed may greatly part of power equipment,close the backend application and process,only keep on your mobile phone contacts,calls,t ext messages,as well as the alarm clock the four basic functions,power consumption conditions might have put an end to the other,to meet the needs of users for long l ife.Finally,the thesis tested the system energy saving management plan and verificati on,test under different usage scenarios of the average current,calculate the use of m obile phones in all scenarios.At the same time respectively in wifi and 4 g state the average standby current test prototype,with test data validate the optimized under the wifi and 4 g in the state of standby on standby current was reduced by 11% and 13% respectively than before optimization,achieve the expected effect of system energy saving management.