The Research And Realization Of3G Communication Technology In Tablet Computer System

With the development of mobile Internet, the mobile terminals and3G whichrepresent the wireless communication technology become the focus of people. Thecore of mobile terminals is operating system. Android operating system has occupiedthe most market of mobile terminal. Especially in China, there are more people useAndroid operating system.Many manufacturers have customized their own operatingsystem based on Android.3G communication technology transmitted mobilecommunication network from mainly for voice service to mainly for high speed dataservice, user can connect to mobile Internet at any time, any place through the mobilephone and enjoy a variety of services provided by the mobile Internet. People haveexperienced the high speed of data exchange by3G communication technology. It notonly opened the digital media and entertainment and information consumption era,but also led to the development of the mobile Internet industry chain. Therefore, it isvery necessary to study the realization of3G communication technology in Android.The content of this thesis is to realize3G communication technology in tabletcomputer system,aim at giving reference to the Android tablet computer3G function.The specific work is as follows:(1) Design the hardware platform structure. Analyze the function of the selectedLCD module, sensor module, touch panel module and audio module,then focus on theprocess of3G module selection and important pin.(2) Complete the3G kernel driver and analyze AT instructions,then study theRIL,focus on the relationship between RIL daemon process and RIL dynamiclibrary,configure RIL in Android system.(3) Explains the tablet system software development environment,compile theLinux kernel and Android file system in this environment and push image files to thedesigned tablet.(4) Start the tablet,verify the3G functional integrity through the Internet, SMS,telephone.In addition, verify the stability of the3G function and tablet system.The experiments at last of this thesis prove that the3G function is integrity andstability on the tablet.