| 低速无线个域网隐蔽站问题研究 |
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| 引用本文： | 唐琳,高琰.低速无线个域网隐蔽站问题研究[J].计算机仿真,2009,26(3). |
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| 作者姓名： | 唐琳 高琰 |
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| 作者单位： | 1. 广州大学计算机系,广东,广州,510006
2. 中南大学通信系,湖南,长沙,410083 |
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| 摘 要： | 低速无线个域网标准IEEE802.15.4协议MAC层的主要目标是有效地减少能量的消耗,而并没有考虑如何有效地减少隐蔽站问题的产生.在无线多跳网络中解决隐蔽站问题主要方法有RTS/CTS和调节载波侦听范围等办法,但是均不适用于低速无线个域网.在对基于IEEE802.15.4的时隙CSMA/CA退避算法和隐蔽站问题产生的原理进行深入分析的基础上,得出了在节点均匀分布的情况下退避指数的最小值macminBE相对于发帧成功率的表达式,提出了通过调节macminBE,来减少由于隐蔽站问题引发的帧冲突的方法.并通过NS2仿真实验验证了方法的可行性.克服了现有方法的不足,较大地提高了网络的性能.
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| 关 键 词： | 载波侦听 隐蔽站 退避指数 |
A Study of Hidden Node Problem in LR-WPAN |
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| TANG Lin,GAO Yan.A Study of Hidden Node Problem in LR-WPAN[J].Computer Simulation,2009,26(3). |
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| Authors: | TANG Lin GAO Yan |
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| Affiliation: | 1.Department of Computer Science;Guangzhou University;Guangzhou Guangdong 510006 China;2.Department of Telecommunication;Central South University;Changsha Hunan 410083 China |
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| Abstract: | IEEE802.15.4 is a standard of LR-WPAN.The protocol used to minimize power consumption does not have the hidden-node protection mechanism.The main methods of Ad hoc to solve hidden-node problem are RTS/CTS and Carrier Sense Tuning.They are all unfit for LR-WPAN.So,this paper finds the relations between macminBE and the rate of frame sending,and proposes to use Back-off Exponent tuning to reduce frame collision caused by hidden nodes based on the deep analysis of CSMA/CA back-off algorithm and hidden node pro... |
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| Keywords: | CSMA Hidden nodes Back-off exponent |
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