| 无线自组织网络中的自适应竞争窗口退避算法 |
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| 引用本文： | 范菁,高飞,王万升,陈跃斌.无线自组织网络中的自适应竞争窗口退避算法[J].计算机工程,2008,34(9):142-144. |
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| 作者姓名： | 范菁 高飞 王万升 陈跃斌 |
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| 作者单位： | 1. 云南民族大学物理与电子电气工程学院,昆明,650031
2. 云南民族大学物理与电子电气工程学院,昆明,650031;中国电子科技大学通信与信息工程学院,成都,610054 |
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| 基金项目： | 云南省自然科学基金
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云南省教育厅资助项目 |
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| 摘 要： | 基于无线自组织网络IEEE 802.11协议原理，改进Ad Hoc网络标准DCF算法，提出一种自动调整最小竞争窗口的退避算法——ABEB算法，建立算法的二维Markov链模型，导出其稳态分布概率，分析其性能并进行了仿真。研究结果表明，与标准DCF算法相比，该算法的吞吐量平均提高了18%，时延平均降低了11%。
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| 关 键 词： | 无线自组织网络 IEEE 802.11协议 DCF算法 退避算法 性能 |
| 文章编号： | 1000-3428(2008)09-0142-03 |
| 修稿时间： | 2007年6月30日 |
Adaptive Contention Window Backoff Algorithm for Wireless Ad Hoc Networks |
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| FAN Jing,GAO Fei,WANG Wan-sheng,CHEN Yue-bin.Adaptive Contention Window Backoff Algorithm for Wireless Ad Hoc Networks[J].Computer Engineering,2008,34(9):142-144. |
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| Authors: | FAN Jing GAO Fei WANG Wan-sheng CHEN Yue-bin |
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| Affiliation: | (1. School of Physics and Electronic Electric Information Engineering, Yunnan Nationalities University, Kunming 650031; 2. School of Communication and Information Engineering, University of Electronic Science and Technology of China, Chengdou 610054) |
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| Abstract: | Based on the protocol of IEEE 802.11 for wireless Ad Hoc networks, the Distributed Coordination Function (DCF) of Ad Hoc networks is modified, and an adaptive minimum contention window binary exponential backoff algorithm namely ABEB is present. The bidimensional discrete-time Markov chain model for ABEB algorithm is established, and the stationary distribution probabilities of the algorithm are educed. The performance of the algorithm is analyzed, and the algorithm is simulated. Compared with DCF algorithm, the study results show that the throughput of ABEB algorithm increases by 18% while the access delay decreases by 11% on average. |
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| Keywords: | wireless Ad Hoc networks IEEE 802 11 Distributed Coordination Function(DCF) backoff algorithm performance |
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