| 无线网络中分布式协调功能的改进 |
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| 引用本文： | 刘岩,舒炎泰,张亮,汪广洪.无线网络中分布式协调功能的改进[J].计算机应用,2004,24(7):162-163,166. |
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| 作者姓名： | 刘岩 舒炎泰 张亮 汪广洪 |
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| 作者单位： | 天津大学,计算机科学与技术系,天津,300072 |
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| 基金项目： | 国家自然科学基金资助项目 (90 1 0 4 0 1 5) |
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| 摘 要： | 文中提出了一种简单而有效的方法动态的估计无线网络中的活动节点数，并根据估计出的活动节点数调整MAC层的初始竞争窗口大小，从而降低冲突概率，提高吞吐率性能。而且，该方法没有增加任何控制开销。仿真结果表明，改进后的IEEE 802．11分布式协调功能机制的性能有明显改善。
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| 关 键 词： | IEEE 802．11 无线局域网 分布式协调功能 |
| 文章编号： | 1001-9081(2004)07-0162-02 |
Adaptive Tuning of Distributed Coordination Function(DCF) in Wireless Network |
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| LIU Yan,SHU Yan tai,ZHANG Liang,WANG Guang hong.Adaptive Tuning of Distributed Coordination Function(DCF) in Wireless Network[J].journal of Computer Applications,2004,24(7):162-163,166. |
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| Authors: | LIU Yan SHU Yan tai ZHANG Liang WANG Guang hong |
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| Abstract: | In the IEEE 802.11 protocol, the adoption of the exponential backoff technique leads to throughput performance strongly dependent on the initial contention window size and, most important, on the number of contending stations considered in the network. In this paper proposed a simple, nevertheless very accurate method to dynamically estimate the number of contending stations, and then adjusted the initial contention window in MAC layer. The simulation results show that the performance of the modified DCF can be better than that of the standard DCF. In addition, the modification does not introduce any control overhead. |
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| Keywords: | IEEE 802 11 Wireless LAN Distributed Coordination Function(DCF) |
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