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Improving TCP Performance over Mobile Networks

机译：通过移动网络提高TCP性能

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Transmission Control Protocol (TCP) is the most commonly used transport protocol on the Internet. All indications assure that mobile computers and their wireless communication links will be an integral part of the future internetworks. In this paper, we present how regular TCP is well tuned to react to packet loss in wired networks. We then define mobility and the problems associated with it. We discuss why regular TCP is not suitable for mobile hosts and their wireless links by providing simulation results that demonstrate the effect of the high bit error rates of the wireless link on TCP performance. We discuss and illustrate the problems caused by the mobility of hosts using a graph tracing packets between fixed and mobile hosts. We then present a survey of the research done to improve the performance of TCP over mobile wireless networks. We classify the proposed solutions into three categories: link layer, end-to-end and split. We discuss the intuition behind each solution and present example protocols of each category. We discuss the protocols functionality, their strengths and weaknesses. We also provide a comparison of the different approaches in the same category and on the category level. We conclude this survey with a recommendation of the features that need to be satisfied in a standard mobile TCP protocol.
机译：传输控制协议（TCP）是Internet上最常用的传输协议。所有迹象表明，移动计算机及其无线通信链接将成为未来互联网的组成部分。在本文中，我们介绍了如何对常规TCP进行适当调整以对有线网络中的数据包丢失做出反应。然后，我们定义了移动性以及与之相关的问题。我们通过提供仿真结果来演示常规TCP为什么不适用于移动主机及其无线链接的原因，这些结果证明了无线链接的高误码率对TCP性能的影响。我们使用固定主机和移动主机之间的图跟踪数据包来讨论和说明由主机的移动性引起的问题。然后，我们将对为提高移动无线网络上的TCP性能而进行的研究进行调查。我们将建议的解决方案分为三类：链路层，端到端和拆分。我们讨论每种解决方案背后的直觉，并介绍每种类别的示例协议。我们讨论了协议的功能，优点和缺点。我们还提供了同一类别和类别级别上不同方法的比较。我们以推荐标准移动TCP协议中需要满足的功能的建议来结束本次调查。

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