摘要
分析了通信信道中起伏噪声和突发噪声对数据传输的影响,推导出了数据帧出错的概率即误帧率与信道误比特率的定量关系。为克服信道噪声引起的帧传送错误,可在数据链路层采用面向连接的协议,以保证向上层用户提供可靠交付服务。其中采用停止等待ARQ协议是最简单的,它适用于许多特定场合。对于该协议,该文详细推导了在信道误比特率较小的情况下的最佳帧长(使数据总传输时间最短)的计算方法及其近似表达式,并分析讨论了该近似式的物理意义和适用范围。
This paper considers the data transmission, system with undulating noise and sudden noise. The quantitative relationship between the misuse frame rate and bit-error-ratio is derived. In this noisy channel, the connection-oriented protocol of data link layer is used to provide reliable delivery service for upper users. The calculation method and the approximate expression of optimal frame size in S-W ARQ protocol of data link layer are deduced in detail in the condition that the bit-error-ratio of channel is relatively small. Moreover, the physical meaning and the application area are also analyzed and discussed.
出处
《电子科技大学学报》
EI
CAS
CSCD
北大核心
2007年第5期854-857,共4页
Journal of University of Electronic Science and Technology of China
关键词
误帧率
最佳帧长
帧头和超时开销
停等ARQ协议
frame error ratio
optimal frame size
overhead of frame head
stop-and-wait ARQ protocol and time out
