数字信道仿真，认真复习数据链路层内容，熟悉编程语言C、C++和WINDOWS程序设计技术（查阅参考书）； 开发工具：VC6.0 或其它； 程序示例： 理想信道的《发送端程序》和《接收端程序》（含源码VC6.0）； ARQ基本协议1:_引入检错和应答帧 ARQ基本协议2:_引入超时计时器 ARQ基本协议3:_引入数据帧携带发送序号0～1 ARQ基本协议4:_引入确认帧携带发送序号0～1 ARQ基本协议5:_引入应答帧含有校验码 ARQ基本协议6:_引入数据帧和确认帧含有发送序号0～7，Ws=1,Ws=1 -digital channel simulation, seriously review of the data link layer, familiar with the C programming language, C and Windows programming technology (accessible reference books); Development tools : VC6.0 or other; Procedures For example : the ideal channel "transmitter" and "receiver procedures "(including the source VC6.0); ARQ a basic agreement : the introduction of error _ and response frames ARQ two basic agreement : the introduction of overtime _ timer ARQ three basic agreement : the introduction of data frames _ carry serial numbers 0 to send a basic agreement ARQ 4 : _ indeed introduced frames carry identification number 0 to send a basic agreement ARQ 5 : _ introduced response frames containing correcting code ARQ six basic agreement : the introduction of data f