嵌入式GPRS调制解调器的设计及在仪表中的应用

The design and application of GPRS modem based on MC35

由于GPRS模块和很多终端设备中无TCP/IP协议栈和PPP协议,使GPRS分组数据业务在终端设备中应用非常困难。本设计在GPRS模块的基础上外扩了一个单片机系统,通过在单片机系统中嵌入PPP协议、TCP/IP协议,使终端设备能够透明地应用GPRS的分组数据业务功能和短消息功能。该系统和GPRS模块一起集成为终端设备专用的GPRS调制解调器。该GPRSMODEM的成本低,可靠性高,而且和终端设备接口方便,再加上体积小,能够方便地嵌入各种终端设备中。另外,本文还给出了它的应用方法。

There is no TCP/IP and PPP in the GPRS module and many terminal equipments?熏 so these make the application in terminal equipments is too hard. Based on GPRS module,a design extern a SCM system,it realizes the GPRS function and make its application so ease through embedding PPP(Point-to-Point Protocol)and TCP/IP (Transfer Control Protocol/Internet Protocol)in SCM (Single Chip Micyoco).The SCM system and GPRS module combine a special GPRS MODEM of terminal equipment.As the modem is not only low cost and high reliability,but also interface easily with other equipments,and its volume is smallness,so it can be embedded easily in all kind of terminal unit. In addition,this paper also gives its application.