Research And Application Design For GPRS Data Communication

The GSM mobile communication business developed very quickly, especially the data-related service. However, as the business increased, the data transfer speed becomes insufficient in some developed countries. Therefore, people began to seek a new mobile communication technology to increase the data transfer speed in current GSM systems. GPRS was born in such circumstances. The data communication is the most widely GPRS application. This article analyzes the communication protocol in data transfer and presents the realization of the software system for mobile terminals.Firstly the GPRS development history is introduced, both the GPRS system structure and the cellular technology related knowledge. Then the GPRS typical architecture is featured, including the structure map, subsystems, communication interfaces and protocols between the entities, logical channel and related services.The realization of the GPRS mobile terminal platform is presented in chapter III. Firstly, the design method about software and hardware structure is introduced. Then the special solution for the mobile phone is described.The realization and application of GPRS function in mobile software system is described in the last part. Firstly the function interface about the GPRS protocol in the lower layer of the mobile system is introduced, including signal process about the attach and detach between mobile terminal and GPRS networks. Next the realization of GPRS modem is presented, also the normal and unusual data transfer signal process about the GPRS Modem. Finally, the application about GPRS modem used to transfer data between two mobile terminals is described, and the test about the data transfer will be also introduced. The test result is analyzed and the reliability of the GPRS data transfer is confirmed.