A two-level Markov model for packet loss in UDP/IP-based real-time video applications targeting residential users
A two-level Markov model for packet loss in UDP/IP-based real-time video applications targeting residential users
复制标题
DOI：
10.1016/j.comnet.2014.05.013
复制
发表时间：
2014-09-09
影响因子：
5.6
通讯作者：
Perkins, Colin
中科院分区：
文献类型：
--
作者：
Ellis, Martin;Pezaros, Dimitrios P.;Perkins, Colin
包括住宅宽带连接在内的互联网路径的丢包特性还没有得到很好的理解，也没有很好的模型来描述它们的行为。这使得针对家庭用户的实时视频应用程序的设计变得复杂，因为如果没有观察到的损失类型的良好模型，很难选择适当的纠错和隐藏算法。通过对英国和芬兰的住宅宽带网络的测量，我们发现现有的丢包模型，如吉尔伯特模型和简单的隐马尔可夫模型，并不能有效地模拟这种环境下的丢包模式。我们提出了一个新的两级马尔可夫丢包模型，可以更准确地描述这些链路的特征，并量化了该模型的有效性。我们证明，我们的新丢包模型允许改进应用程序设计，通过使用它来模拟这些链路上的前向纠错性能。(C) 2014年作者。Elsevier B.V.出版
The packet loss characteristics of Internet paths that include residential broadband links are not well understood, and there are no good models for their behaviour. This complicates the design of real-time video applications targeting home users, since it is difficult to choose appropriate error correction and concealment algorithms without a good model for the types of loss observed. Using measurements of residential broadband networks in the UK and Finland, we show that existing models for packet loss, such as the Gilbert model and simple hidden Markov models, do not effectively model the loss patterns seen in this environment. We present a new two-level Markov model for packet loss that can more accurately describe the characteristics of these links, and quantify the effectiveness of this model. We demonstrate that our new packet loss model allows for improved application design, by using it to model the performance of forward error correction on such links. (C) 2014 The Authors. Published by Elsevier B.V.