| Ad hoc网络中DCF公平性分析与改进 |
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| 引用本文： | 雷磊,许宗泽.Ad hoc网络中DCF公平性分析与改进[J].电子与信息学报,2008,30(2):472-476. |
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| 作者姓名： | 雷磊 许宗泽 |
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| 作者单位： | 南京航空航天大学信息科学与技术学院,南京,210016 |
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| 摘 要： | 在考虑节点的物理载波检测范围大于通信范围的情况下,该文分析了多跳Adhoc网络中物理载波检测机制对IEEE 802.11DCF协议公平性的影响。针对载波干扰给IEEE802.11DCF协议带来的严重不公平问题,提出了一种基于冲突和干扰感知的退避(CIAB)算法。仿真证明,该算法能有效地改善IEEE802.11DCF协议的公平性,并且没有引起网络吞吐量的严重下降。
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| 关 键 词： | Ad hoc网络 DCF协议 公平性 物理载波检测机制 |
| 文章编号： | 1009-5896（2008）02-0472-05 |
| 收稿时间： | 2006-07-10 |
| 修稿时间： | 2006-12-18 |
Analyzing and Improving the DCF Fairness in Ad hoc Network |
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| Lei Lei,Xu Zong-ze.Analyzing and Improving the DCF Fairness in Ad hoc Network[J].Journal of Electronics & Information Technology,2008,30(2):472-476. |
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| Authors: | Lei Lei Xu Zong-ze |
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| Affiliation: | College of Info. Sci. and Tech., Nanjing Univ. of Aeronaut. and Astronaut., Nanjing 210016, China |
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| Abstract: | In this paper,the impact of physical carrier-sense mechanism on the fairness of the IEEE 802.11DCF MAC protocol in multi-hop Ad hoc networks is investigated,considering that physical carrier-sense range is much lager than communication range.This paper discovers that the IEEE 802.11 DCF MAC protocol may suffers from a great fairness problem because of the carrier interference.To solve this problem,a Collisions and Interferences Aware Backoff(CIAB)algorithm is then proposed.Simulation results show that this algorithm can greatly improve the fairness of the IEEE 802.11 DCF MAC protocol without significantly impairing aggregate throughput in Ad hoc networks. |
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| Keywords: | Ad hoc network DCF protocol Fairness Physical carrier-sense mechanism |
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