| Nowadays, with the rapid development of the embedded and modern communication technologies, it becomes possible for people to use intelligent mobile devices to deal with bussiness applications, also these devices obtains the commercialization promotion by the astounding speed. Many industrial magnates are producing kinds of mobile devices, such as PDA, smart phone etc, which can provide with many services and functions. The breakthrough of memory and CPU power of the device requires the better embedded OS, embedded application platform, and integration of them.This thesis makes a deeper study on the application development technologies based on PDA. Firstly, the envirnment of developing applications based on PDA are addressed, and then the classes and characteristics of embedded opearation system are discussed, and select WinCE as the development envirnment after comparison of several operation systems; adopt EVC as the development kit through discuss the characteristics of software development based on WinCE.In the following, a modal of PDA application is given, and makes a deeper analysis of the structure. Then the characteristics and process of wareless transmission technologies are talked; The structure of mobile databse is introduced, and analyzes three key technologies, such as mobile transaction procedure mobile data replication& buffer memory and data broadcast.Then the technology of data replication of mobile database and data synchronizition based XML are addressed. After compare the two kinds of data synchronizition, two methods are given to solve confiction of data synchronizition. And the text combination the advantages of two kinds of data synchronizition, gives out a new method to fulfil the practical project's requirement. The method not only sovle the data consistency, but also reduce down the cost of wareless transmission; After that, technology of data communication based on windows is addressed, the protocol of TCP/IP is analyzed, also the process of data transmission based on socket is discussed, and the text gives instruction system of the transmission system and the process of data encapsulation.Finally, the thesis uses UML to modeling and analyze the system, i have made a series of application attempting of using UML. At last, I have associated with the pratical system requirment to develop a whole application system which named PDA charging management system. |
