Design And Research Of GPRS Terminal Based On The Embedded Protocol Stack

As the rapid development of the technology of communication, GPRS wireless communication network has been connected to Internet, and has become a resource which can be continually utilized and explored. And the GPRS network provides a data transfer rate as high as 115kbit/s when running a packet service and it can fit the requirement of most instances in the industrial control field. So more and more embedded equipments begin to use it, and researches about it become deeper as time goes on. Utilizing embedded protocol stack and the GPRS network, a new kind of distribution power automation terminal has been built with the help of MSP430F449 single chip and GPRS wireless communication. The embedded protocol stack contains PPP,TCP,UDP and IP protocol, so the terminal can connect to Internet through the GPRS module, and communicate with the monitoring centre.First, this article introduces the theory of GPRS, and gives details about the function and application of GPRS terminal. Second, it analyzes the application of PPP protocol and TCP/IP protocol stack in GPRS terminal, such as the design concepts and workflow of some implements. Third, it tests the terminal in different system environment and in different configuration of hardware and software, and then makes a discussion with the result of the test. At last, it introduces the procedure of the debugging of the software and some solutions, and tables some proposals to improve the whole system.The GPRS distribution power automation terminal in this article is good at transferring data in real-time, and it uses transparent transmission method. So it is especially suitable for the area which is hard to wire and the outlying area.