GPRS技术在小电流接地选线系统中的应用

Application of GPRS Technique in the Little Current Ground Connection System

为解决偏远地区小电流接地选线系统的数据传输问题,提出了基于GPRS技术的小电流接地选线系统通信解决方案。先介绍了SonyEricsson公司研制开发的GPRS模块GR47,并以GR47模块为核心,以相应单片机为控制器,分别设计了GPRS远端模块和中央模块。为了保证发送/接收数据的正确性,采用了CRC校验方法;为了保证数据的安全性,对所传输的数据采取了严格的加密措施,每帧数据所采用的加密算法是不确定的,完全是由一个随机数来确定,在较大程度上保证了数据的安全性。然后介绍了GPRS远端模块、GPRS中央模块的硬件电路设计、主要程序流程图以及各模块的开发流程。经过实际测试,在数据的传输速率、数据的误码率以及系统建立连接等方面均达到了设计要求,测试证明GPRS技术完全可以应用在小电流接地选线系统中。

This paper proposes a solution based on GPRS technique to the problem of data transmission in the Little Current Ground Connection Systems in remote areas. Firstly, the GPRS module——GR47, developed by Sony Ericsson Cooperation, is introduced. And then the GPRS remote module and central module are designed respectively using the GR47 as the core and the corresponding single chip computer as the controller .To ensure the correctness of the data transmitted/received, CRC verification is adopted. To ensure the safety of the data, all the data transmitted are encrypted in such a way that the encryption algorithm for each data packet is different and is determined by a random number. This paper also presents the GPRS remote module, the design of hardware circuit for the central module, the flow-chart of main programs and the development process of individual modules. The testing results show that the data transmission speed,the byte error rate in the data transmission,and the system set\|up operations all satisfy the system requirements. It has been convinced that the GPRS technique can be used successfully in the Little Current Ground Connection System.