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TCP performance measured over heterogeneous wireless networks with high delay-bandwidth product

机译:在具有高延迟带宽乘积的异构无线网络上测量的TCP性能

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摘要

The performance of three variants of TCP (Westwood+, NewReno, and NewReno with SACK option), available in the Linux Kernel, have been measured in a heterogeneous satellite-terrestrial wireless integrated network, characterized by high delay-bandwidth product and random losses. The testbed is made up of a set of portable computers, interconnected by WLANs, and a remote host connected via a geostationary satellite link. The target of this work is to measure the real performance of the TCP protocol, in order to verify the accuracy of some models proposed in the literature. In fact, most of these models have generally been validated only by means of analytical or simulation approaches, but without the use of real measurements. We utilized the SkyplexData commercial satellite platform, which adopts routers characterized by very large buffers. The goodput of both a single and two simultaneous TCP flows has been measured. Moreover, timeoutsu27 occurrences, which produce the most relevant effects in such an environment, are thoroughly investigated.
机译:Linux内核中提供的三种TCP变体(Westwood +,NewReno和NewReno,带有SACK选项)的性能已在异构的地面卫星无线集成网络中进行了测量,其特征是高延迟带宽乘积和随机损耗。该测试台由通过WLAN互连的一组便携式计算机和通过对地静止卫星链路连接的远程主机组成。这项工作的目标是测量TCP协议的实际性能,以验证文献中提出的某些模型的准确性。实际上,大多数这些模型通常仅通过分析或模拟方法进行了验证,而没有使用实际测量。我们利用了SkyplexData商业卫星平台,该平台采用了具有非常大缓冲区的路由器。已经测量了一个和两个同时TCP流的吞吐量。此外,对在这种环境下产生最相关影响的超时发生进行了彻底调查。

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