| 数据链路层停等ARQ协议的最佳帧长近似解 |
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| 引用本文： | 孙翔,陈松明. 数据链路层停等ARQ协议的最佳帧长近似解[J]. 电子科技大学学报(社会科学版), 2007, 0(5) |
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| 作者姓名： | 孙翔 陈松明 |
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| 作者单位： | 成都信息工程学院通信工程系 成都610225(孙翔)，电子科技大学出版社 成都610054(陈松明) |
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| 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。
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| 关 键 词： | 误帧率 最佳帧长 帧头和超时开销 停等ARQ协议 |
Approximate Solution of Optimal Frame Size in S-W ARQ Protocol of DLL |
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| SUN Xiang,CHEN Song-ming. Approximate Solution of Optimal Frame Size in S-W ARQ Protocol of DLL[J]. Journal of University of Electronic Science and Technology of China(Social Sciences Edition), 2007, 0(5) |
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| Authors: | SUN Xiang CHEN Song-ming |
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| Affiliation: | SUN Xiang1,CHEN Song-ming2 |
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| Abstract: | 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. |
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| Keywords: | frame error ratio optimal frame size overhead of frame head stop-and-wait ARQ protocol and time out |
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