The GPRS network connects to an external network (like the Internet) using a GGSN (Gateway GPRS Support Node).

GPRS网络使用GGSN (GPRS网关支持节点)连接到一个外部网络(例如Internet)。

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To support these tasks, the thesis discusses the design of the GPRS communication module, the RS485 communication module, the IrD communication module, the tinier module and the FLASH module.

为了支持这些功能，又介绍了网络模块、485串口通讯模块、定时器模块、闪存模块、中断模块等底层驱动的设计。

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Application processor through the at command set and functionality with GPRS wireless communication module, in order to achieve the application of the network provides a bottom support.

应用处理器通过AT命令集与带gprs功能的无线通讯模块通信，为实现网络的应用提供了一个最底层的支持。

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