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首页> 外文期刊>IEEE Transactions on Parallel and Distributed Systems >Two Blocks Are Enough: On the Feasibility of Using Network Coding to Ameliorate the Content Availability of BitTorrent Swarms
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Two Blocks Are Enough: On the Feasibility of Using Network Coding to Ameliorate the Content Availability of BitTorrent Swarms

机译：两个步骤已足够：使用网络编码改善BitTorrent Swarms内容可用性的可行性

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摘要

In this paper, we conduct an in-depth study on the feasibility of using network coding to ameliorate the content availability of BitTorrent swarms. We first perform mathematical analysis on the potential improvement in the content availability and bandwidth utilization induced by two existing network coding schemes. It is found that these two coding schemes either incur a very high coding complexity and disk operation overhead or cannot effectively leverage the potential of improving the content availability. In this regard, we propose a simple sparse network coding scheme in which both the drawbacks mentioned before are precluded. To accommodate the proposed coding scheme into BitTorrent, a new block scheduling algorithm is also developed based on the original rarest-first block scheduling policy of BitTorrent. Through extensive simulations and performance evaluations, we show that the proposed coding scheme is very effective in terms of improving the content availability of BitTorrent swarms when compared with some existing methods.
机译：在本文中，我们对使用网络编码改善BitTorrent群组内容可用性的可行性进行了深入研究。我们首先对两种现有的网络编码方案在内容可用性和带宽利用率方面的潜在改进进行数学分析。发现这两种编码方案或者引起非常高的编码复杂度和磁盘操作开销，或者不能有效地利用改善内容可用性的潜力。在这方面，我们提出了一种简单的稀疏网络编码方案，其中消除了前面提到的两个缺点。为了将提出的编码方案容纳到BitTorrent中，还基于BitTorrent最初的稀有优先块调度策略，开发了一种新的块调度算法。通过广泛的仿真和性能评估，我们表明，与某些现有方法相比，提出的编码方案在提高BitTorrent群集的内容可用性方面非常有效。

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