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Performance analysis of TCP over wired and wireless networks.

机译：有线和无线网络上的TCP性能分析。

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摘要

Transmission Control Protocol (TCP) currently accounts for about 90% applications and 80% data of network traffic, and plays the dominant role in Internet transmission. In this dissertation, we present three studies of TCP performance over wired and wireless networks. In the first study, we mainly focus on the stability of TCP/AQM (Active Queue Management) systems for wired network environment. In particular, we study the local and global stability of TCP-newReno/RED under many flows regime. By using a normalized discrete-time model, which is simple, we analyze the global stability in a very efficient manner, and the results show that by properly choosing RED parameters, we can always make the TCP-newReno/RED system globally stable.; The second study concerns the TCP performance when the buffer size is scaled up differently from the traditional one at a link with large capacity shared by many flows. Specifically, we consider the buffer size chosen on the order of (Nalpha) (0 alpha 1), where N flows share the link of capacity O(N). We then develop a doubly-stochastic model for a TCP/AQM system with many flows by taking into account the packet-level dynamics over fine time scales. We show that, under our scale, the system always performs well in the sense that the link utilization goes to 1 and the loss ratio decreases to zero as the system size N increases. We verify our results using extensive ns-2 simulations.; Finally, we then analyze the impact of TCP flows on the wireless networks from the resource allocation point of view. We propose a TCP-AIMD aware call admission control scheme over wireless networks. Our scheme is based on a two level CAC framework, which takes both the call level and the packet level dynamics into account. The interaction between two levels is characterized through a single metric called the Quality of Service (QoS) guaranteed capacity. The performance of the proposed scheme is then analyzed and extensive simulation results are presented under different scenarios. Our results show that the proposed scheme can improve the system performance both on call and packet levels.
机译：传输控制协议（TCP）目前约占90％的应用程序和80％的网络流量数据，并在Internet传输中起主导作用。本文对有线和无线网络上的TCP性能进行了三项研究。在第一个研究中，我们主要关注有线网络环境中TCP / AQM（活动队列管理）系统的稳定性。特别是，我们研究了在许多流量情况下TCP-newReno / RED的局部和全局稳定性。通过使用简单的归一化离散时间模型，我们可以非常有效地分析全局稳定性，结果表明，通过适当选择RED参数，我们始终可以使TCP-newReno / RED系统始终保持全局稳定。第二项研究涉及当缓冲区的大小与传统缓冲区在与许多流共享的大容量链接不同时按比例放大时的TCP性能。具体来说，我们考虑按（Nalpha）（0

著录项

  • 作者

    Wang, Xinbing.;

  • 作者单位

    North Carolina State University.;

  • 授予单位 North Carolina State University.;
  • 学科 Engineering Electronics and Electrical.
  • 学位 Ph.D.
  • 年度 2006
  • 页码 177 p.
  • 总页数 177
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 无线电电子学、电信技术;
  • 关键词

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