基于GPRS的Linux嵌入式设备的通信研究

THE RESEARCH OF LINUX EMBEDDED DEVICES' COMMUNICATION BASED ON GPRS

嵌入式设备一般使用GPRS进行数据传输,由于GPRS的数据传输受信号强度影响比较大,所以经常会出现掉线、数据丢失、客户端等待时间长等问题。本文以某型号Linux嵌入式个人数字助理(以下简称PDA)为例,使用非阻塞Socket以单线程的方式解决了掉线及客户端等待时间较长的问题;对于数据丢失及数据传输错误等问题,采取了互斥锁等机制,以较低的资源占用解决了上述问题。

GPRS is the common way to transfer data with other devices,but the data transfer is affected by the signal strength is relatively high,so lose of data,state dropped and too long time clients need to wait often occurred.This paper takes a kind of Linux embedded personal digital assistants（PDA for short） as an example,using non-blocking socket,mutex lock etc.solved the above problems in low occupation of resources.