| 基于二次碰撞的CSMA/CA算法的优化 |
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| 引用本文： | 周林,朱马锋.基于二次碰撞的CSMA/CA算法的优化[J].黑龙江电子技术,2014(6):14-17. |
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| 作者姓名： | 周林 朱马锋 |
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| 作者单位： | 重庆邮电大学通信软件技术研究所,重庆400065 |
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| 基金项目： | 国家自然科学基金资助项目（61171190） |
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| 摘 要： | 基于时隙的载波监听多址接入/冲突检测（Carrie Sense Multiple Access with Collision Avoid,CSMA/CA）算法在处理第一次CCA检测信道为闲,第二次CCA检测信道为忙的情况时存在两个主要的缺陷,针对这两个缺陷引入两个参数FN、SN来提高节点成功接入信道的概率.最后应用NS-2软件进行仿真结果表明,改进的CSMA/CA算法在吞吐量和平均网络时延方面优于原算法.
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| 关 键 词： | CSMA CA CCA 吞吐量 平均网络时延 |
A modified CSMA/CA algorithm for IEEE802.15.4 protocol |
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| Authors: | ZHOU Lin ZHU Ma-feng |
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| Affiliation: | (Institute of Communication Software, Chongqing University of Posts and Telecommunications, Chongqing 400065, China) |
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| Abstract: | There exist two main defects when the Collision Avoid （CSMA/CA） is used in dealing with algorithm of the carrie sense multiple access with the conditions：when the first CCA channel detecting is idle while the second CCA channel detecting is busy. Therefore, two parameters （ FN, SN） are used to improve the probability of one node accessing channel succesed. Through the NS-2, the simulation results show that the proposed algorithm performs better than the original one, which improves throughput and average medium access control （MAC）delay. |
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| Keywords: | CSMA/CA CCA throughput average medium access control （MAC） delay |
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