Evaluation on Required Time and Arrival Order of Blocks for Segmented File Downloading Methods Using PR-SCTP and Unordered Delivery
Evaluation on Required Time and Arrival Order of Blocks for Segmented File Downloading Methods Using PR-SCTP and Unordered Delivery
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PR-SCTP和无序传送分段文件下载方法所需时间和块到达顺序评估
DOI：
10.1109/icdcsw.2016.33
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发表时间：
2016
期刊：
影响因子：
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通讯作者：
Junichi Funasaka and Kazuya Takeda
中科院分区：
文献类型：
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作者：
Yohei Yamaguchi;Noritaka Shigei;Hiromi Miyajima;Akira Yamawaki and Seiichi Serikawa;Junichi Funasaka and Kazuya Takeda
为了在高损耗网络中获得更好的性能，提出了一种分段文件下载方法，该方法由基于生存时间（TTL）的PR-SCTP和无序传输两部分组成，前者限制了重传时间，后者消除了线头阻塞问题的影响。然而，现有的方法没有考虑块的到达顺序。在本文中，由于该方法可以应用于顺序敏感的应用程序，如HTTP流，我们评估了现有的方法和两个新提出的方法：延迟重试的方法，不担心到达顺序在所有和随机重试方法的数量无序到达。本文使用真实的机器和网络仿真器，也可以实现无线局域网的功能，在块的到达顺序和下载完成所需的时间方面的方法的评估结果报告。本文阐明的下载时间与块到达顺序之间的关系，一定是为各种需求的用户提供保障服务的重要参考数据。
To yield better performance on highly lossy networks, a segmented file download method composed of both Time-to-Live (TTL) based PR-SCTP which limits the retransmission time and unordered delivery which alleviates the influence of Head-of-Line blocking problem has been proposed. However, the existing method did not take the arrival order of blocks into account. In this paper, since the method can be applied to order-sensitive applications such as HTTP streaming, we evaluate the number of out-of-order arrivals for the existing method and two newly proposed methods: a delayed retrying method which does not worry the arrival order at all and a stochastic retrying method. The evaluation results on the methods in terms of the arrival order of blocks and the required time for the download completion are reported in this paper, using real machines and network emulators which can also realize the wireless LAN features. The relation between the download time and the arrival order of blocks clarified in this paper must be important reference data to offer assurance services to users with various demands.