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| 通过自适应调整最小竞争窗口最大化IEEE 802.11 DCF的饱和吞吐量 | |
| 引用本文： | 李云,陈前斌,隆克平,吴诗其.通过自适应调整最小竞争窗口最大化IEEE 802.11 DCF的饱和吞吐量[J].电子与信息学报,2006,28(10):1930-1934. |
| 作者姓名： | 李云 陈前斌 隆克平 吴诗其 |
| 作者单位： | 1. 重庆邮电学院光互联网及无线信息网络研究中心,重庆,400065;电子科技大学抗干扰国防重点实验室,成都,610054 2. 重庆邮电学院光互联网及无线信息网络研究中心,重庆,400065 3. 电子科技大学抗干扰国防重点实验室,成都,610054 |
| 基金项目： | 国家高技术研究发展计划(863计划);国家自然科学基金;重庆市教委资助项目;重庆市自然科学基金;人事部归国人员择优资助联合资助项目 |
| 摘 要： | 最大化802．11 DCF的饱和吞吐量对充分利用无线局域网宝贵的带宽资源具有重要意义。该文在分析802．11 DCF的饱和吞吐量与最小竞争窗口、最大回退等级、网络中竞争信道的节点数的关系的基础上，推导了根据网络中竞争信道的节点数，计算最小竞争窗口的最佳值的简单公式。给出了估计竞争信道的节点数并据此动态调整最小竞争窗口的最佳值的自适应算法。同时，该文对估计竞争节点数的算法的准确性和计算最小竞争窗口最佳值的公式的准确性进行了仿真分析，并比较了改进后的802．11 DCF的饱和吞吐量与原802．11 DCF的饱和吞吐量的大小。仿真结果证明了上述公式、算法是准确和有效的。 |
| 关 键 词： | 无线局域网 分布式协调功能 饱和吞吐量 |
| 文章编号： | 1009-5896（2006）10-1930-05 |
| 收稿时间： | 2005-02-21 |
| 修稿时间： | 2005-07-14 |
Self-adaptively Adjusting the Minimum Contention Windows to Maximizing the Saturated Throughput of IEEE 802.11 DCF |
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| Li Yun,Chen Qian-bin,Long Ke-ping,Wu Shi-qi.Self-adaptively Adjusting the Minimum Contention Windows to Maximizing the Saturated Throughput of IEEE 802.11 DCF[J].Journal of Electronics & Information Technology,2006,28(10):1930-1934. | |
| Authors: | Li Yun Chen Qian-bin Long Ke-ping Wu Shi-qi |
| Affiliation: | Special Research Centre for Optical Internet & Wireless Information Networks, Chongqing University of Posts & Telecommunications, Chongqing 400065, China; National Defense Key Lab of Anti-interference Communication Technology, University of Electronic Science and Technology of China, Chengdu 610054, China |
| Abstract: | It is important to maximize the saturated throughput of 802. 1 1 DCF for fully utilizing wireless bandwidth. The saturated throughput of 802.11 DCF is related to minimum contention windows, maximum backoff stage and the contending nodes in the networks. Based on the analysis to this relationship, this paper induces a simple formula to calculate the optimized minimum contention windows for maximizing the saturated throughput of 802. 1 1 DCF, and gives a self-adaptive contention nodes estimation algorithm, according to which and the simple formula, the optimized minimum contention windows is adapted dynamically. The accuracy of above formula and algorithm is valuated by simulation. The saturated throughput of improved 802.11 DCF and the saturated throughput of 802.11 DCF are compared in this paper. The simulation results prove that the above formula and algorithm are accurate and effective. |
| Keywords: | 802 11 |
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