| Performance Improvement of DCF Supporting Multi-Rate in IEEE 802.11b Wireless LAN |
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| 作者姓名： | 葛卫民 张亮 舒炎泰 |
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| 作者单位： | School of Computer Science and Technology Tianjin University，School of Computer Science and Technology Tianjin University，School of Computer Science and Technology Tianjin University，Tianjin 300072 China，Tianjin 300072 China，Tianjin 300072 China |
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| 摘 要： | Inrecent years ,IEEE802.11 wirelesslocal area net-work (WLAN) has emerged as a prevailing technology forthe (indoor) broadband wireless access to internet for themobile/portable devices . In IEEE 802.11 standards ,802.11b has become the most widely used v…
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| 关 键 词： | 无线电 生产能力 公平原则 电气 |
| 修稿时间： | 2007-03-01 |
Performance Improvement of DCF Supporting Multi-Rate in IEEE 802.11b Wireless LAN |
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| GE Weimin,ZHANG Liang,SHU Yantai.Performance Improvement of DCF Supporting Multi-Rate in IEEE 802.11b Wireless LAN[J].Transactions of Tianjin University,2007,13(4):276-281. |
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| Authors: | GE Weimin ZHANG Liang SHU Yantai |
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| Institution: | School of Computer Science and Technology, Tianjin University, Tianjin 300072, China |
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| Abstract: | This paper proposes a new channel access algorithm based on channel occupancy time (COT) fairness to guarantee fairness and improve the aggregate throughput of 802.11b multi-rate WLANs. In the algorithm, the COT is used as fairness index to analyze the fairness of WLANs instead of the channel access probability (CAP) used in the distributed coordination function (DCF). The standard COT is given by access point (AP) and broadcasted to all wireless stations. The AP and wireless stations in the WLAN can achieve COT-based fairness by adjusting their packet length, sending the multiple back-to-back packets at one time, or giving up an opportunity to access the channel. Analysis and simulations show that our algorithm can provide COT-fairness. Compared with the CAP-based algorithm, the proposed algorithm leads to improvements in aggregate throughput of IEEE 802.11b multi-rate WLANs. |
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| Keywords: | IEEE 802 11b wireless LAN multi-rate throughput fairness |
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