一种串行接口设备的Internet接入服务器

随着设备网络化及普适计算模式的形成，许多带有传统串行接口的设备产生了Internet接入的需求。早期的解决方案要求Internet接入服务器能够识别设备的数据通信协议，并依据通信协议的内容来确定网络数据报的报文。为了提高接入服务器的通用性，减少接入服务器对设备通信协议的依赖，本文基于嵌入式Internet技术，提出了一种通用Internet设备接入服务器。它无需对现有设备做任何修改，不依赖于串行设备自身数据帧格式的结构，“透明”地实现了面向流传榆方式的串行接口和面向包传输方式的网络接口之间的数据转换。

A Kind of Internet Access Server for Devices with Serial Interface

With the development of device networking and ubiquitous computing,many devices with traditional serial interface have a consumingly requirement of accessing Internet. In many early solutions,Internet Access Server must distinguish device communication protocols and group network datagram according to the detailed content of proto- cols. For the sake of improving generality of access server and reducing dependence of device protocols,this paper pre- sents a kind of general Internet Device Access Server based on Embedded Internet technique. Whatever data frame structure of exist serial devices,DAS transparently implements the transformation between serial interface data fea- tured by stream transmission and network interface data featured by datagram transmission.