通过串口发送彩信在无线远程监控嵌入式系统中的应用

随着无线网络的迅速发展,远程监控不但要求能够报警通知,同时还需要尽快得到现场画面,彩信的嵌入式系统将是未来无线远程监控的发展趋势.本文详细分析了彩信的流程、结构和封装协议,可知彩信发送的是一个个PDU消息,并且大部分只有标题没有内容,这和短信没有什么区别,真正的内容只在其中两步以16进制码的格式放在彩信体内.因此文章提出了以图像的压缩码流作为彩信体的正文在发送端发送,接收端通过解码获得图像的监控方法,并且完成短信的PDU收发工作.

MMS sent from serial port application in wireless remote monitoring in embedded system

With the rapid development of the wireless network,remote monitor not only needs to give an alarm notification,but also a live picture is required as soon as possible.MMS embedded system will be a trend in the future in wireless remote monitor.After analyzing the MMS' sending process,structure and encapsulation protocol in detail,this paper proposes the idea that in fact,MMS sends many PDU messages,and most of them only have a title but no content,and just like a SMS.The true content is in the MMS body and saved as 16-band codes in two steps.Then the paper introduces a monitoring method that the compression image's code stream is sent as the MMS' body in the transmitter,and it is decoded in the receiver to acquire the image.Bedsides,SMS' sent and received in PDU mode has been finished successfully.