An Analysis of Resequencing Delay of Reliable Transmission Protocols over Multipath
An Analysis of Resequencing Delay of Reliable Transmission Protocols over Multipath
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DOI：
10.1109/icc.2010.5502207
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发表时间：
2010-05
期刊：
影响因子：
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通讯作者：
Kun Zheng;Xuewu Jiao;Min Liu;Zhongcheng Li
中科院分区：
文献类型：
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作者：
Kun Zheng;Xuewu Jiao;Min Liu;Zhongcheng Li
多路径传输利用多个独立的端到端路径来提高总传输吞吐量。由于分组重新排序的结果，到达接收器的异步分组导致可靠的传输协议，如TCP和SCTP，遭受重排序延迟。重排序延迟会降低一些对延迟敏感的应用程序的性能。本文分析了在典型的多径传输场景中，平均分组的平均重排序时延。在这种情况下，假设路径延迟是恒定的，但彼此不同。在综合考虑路径选择概率、路径时延和带宽的情况下，推导了平均分组在长期会话中的平均重排序时延模型。利用技术成熟的多路径传输实例SCTP CMT对该模型进行了评估。结果表明，解析模型的计算结果与仿真结果吻合较好。我们希望该模型可以作为重排序时延估计的参考，帮助多径传输算法获得更好的性能。
Multipath transfer utilizes multiple independent end-to-end paths to improve the total transmission throughput. Reliable transmission protocols as TCP and SCTP suffer resequencing delay due to asynchronous packet arrivals at the receiver as a result of packet reordering. The resequencing delay deteriorates the performance of some delay-sensitive applications. In this paper, we make an analysis of the mean resequencing delay for an average packet in a typical multipath transfer scenario. In the scenario, the path delay is assumed to be constant while distinct to each other. In consideration of path selecting probability, path delay and bandwidth, a model of the mean resequencing delay for an average packet in a long-term session is derived. The model is evaluated with the aid of SCTP CMT, which is a technically mature multipath transfer instance. It is shown that the results computed from the analytical model agree well with the output of the simulations. We expect the model can be used as a reference of resequencing delay estimation, aiding multipath transfer algorithms to get a better performance.