多接收机选择性重复ARQ中的重排序延迟和缓冲占用

N. Shacham, D. Towsley
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引用次数: 42

摘要

作者考虑了一个具有一个源和多个接收器的SR ARQ(选择性重复自动重复请求)协议,其中每个接收器确认所有数据包并仅基于它接收到的无错误数据包处理其重排序缓冲区。分析了重排序延迟和接收端的缓冲区占用。他们构建了一个模型,该模型允许他们得出稳态结果,并考虑到系统参数,如接收器数量、传播延迟、数据包和确认的错误概率。分析的主要结果是重排序延迟的分布和占用接收端缓冲区的数据包数量的分布。他们还推导出了当包错误概率趋近于1时,在极限处平均缓冲区占用的简单表达式。数值结果说明了系统参数对期望重排序延迟和期望缓冲区占用行为的影响。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Resequencing delay and buffer occupancy in selective repeat ARQ with multiple receivers
The authors consider an SR ARQ (selective-repeat automatic-repeat-request) protocol with the one source and multiple receivers, where each receiver acknowledges all packets and handles its resequencing buffer based only on the packets that it receives error-free. An analysis of the resequencing delay and buffer occupancy at a receiver is presented. They construct a model that allows them to derive steady-state results and that makes into consideration system parameters such as number of receivers, propagation delay, and error probabilities of packets and acknowledgements. The main results of the analysis are the distribution of the resequencing delay and the distribution of the number of packets occupying the receiver's buffer. They also derive simple expressions for the mean buffer occupancy at the limit as the packet error probability tends to one. Numerical results are provided to illustrate the effects of system parameters on the behavior of the expected resequencing delay and the expected buffer occupancy.<>
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