• 中国计算机学会会刊
  • 中国科技核心期刊
  • 中文核心期刊

J4 ›› 2007, Vol. 29 ›› Issue (9): 1-4.

• 论文 •    下一篇

TCP在多跳移动Ad Hoe网络中的公平性研究

任伟[1,2,3] 金海[1]   

  • 出版日期:2007-09-01 发布日期:2010-06-02

  • Online:2007-09-01 Published:2010-06-02

摘要:

本文讨论TCP在移动AdHoe网络中不公平的原因及影响TCP公平性的场景分类。大量的模拟实验和分析表明,TCP公平性应该包括瞬间公平性和累积公平性。如果一个TCP流的发送节.量是其他TCP流发送节点的隐藏终端,公平性最差。只有当TCP流中所有节.最都在信号感知范围内才能保持公平性。通过使用IEEE802.1ie适当设定TCP流的优先值,能够提高TCP公平性。

关键词: TCP移动自组网 公平性 IEEE 802.11e 性能评价

Abstract:

An analysis of the reason of TCP unfairness and the classification of scenarios are given. The extensive NS2 simulation and analysis show that TCP fairness includes instant fairness and cumulative fairness. If the sending node of one TCP flow is the hidden terminal of other TCP flows, the unfairness w  ill be the highest. It can maintain TCP fairness only when all the nodes in TCP flows are in the sensing or interference range. Using 802, 11e EDCF can  improve the TCP fairness if the priorities of TCP flows are set.

Key words: TCP, mobile ad hoc network, faimess;IEEE 802. 11e, performance evaluation