利用FEC实现多径传输中的路径传播时间差
Exploiting the Path Propagation Time Differences in Multipath Transmission with FEC
摘要：
我们考虑从一个单一的源到一个单一的目的地的延迟敏感的数据流的传输。这种传输的可靠性可能会受到突发性数据包丢失的影响-这是当今互联网中的主要故障类型。一个有效的和充分研究的解决方案，这个问题是保护数据的前向纠错（FEC）码和发送的FEC数据包在多个路径。在本文中，我们表明，这样的多径FEC方案的性能往往可以进一步提高。我们的关键观察结果是，可用路径上的传播时间通常存在显著差异，通常为10- 100 ms。我们建议利用这些差异适当的数据包调度，我们称之为“包”。我们用精确的分析公式和跟踪驱动的模拟来评估我们的解决方案。我们的研究表明，Spread的性能大大优于最先进的解决方案。它通常实现有效损失率的2至5倍改善（减少）。或者相反，在保持相同的有效损失率水平的情况下，Spread显著降低了观察到的延迟，并有助于对抗延迟抖动。
英文摘要：
We consider a transmission of a delay-sensitive data stream from a single source to a single destination. The reliability of this transmission may suffer from bursty packet losses - the predominant type of failures in today's Internet. An effective and well studied solution to this problem is to protect the data by a Forward Error Correction (FEC) code and send the FEC packets over multiple paths. In this paper we show that the performance of such a multipath FEC scheme can often be further improved. Our key observation is that the propagation times on the available paths often significantly differ, typically by 10-100ms. We propose to exploit these differences by appropriate packet scheduling that we call `Spread'. We evaluate our solution with a precise, analytical formulation and trace-driven simulations. Our studies show that Spread substantially outperforms the state-of-the-art solutions. It typically achieves two- to five-fold improvement (reduction) in the effective loss rate. Or conversely, keeping the same level of effective loss rate, Spread significantly decreases the observed delays and helps fighting the delay jitter.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
