| 基于IEEE 80211e EDCA的下行信道动态无竞争接入机制* |
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| 引用本文： | 冯正勇,文光俊,张文彬,邓云凯.基于IEEE 80211e EDCA的下行信道动态无竞争接入机制*[J].计算机应用研究,2010,27(8):3083-3085. |
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| 作者姓名： | 冯正勇 文光俊 张文彬 邓云凯 |
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| 作者单位： | 1. 电子科技大学,通信与信息工程学院,成都,611731
2. 中国科学院,电子学研究所,北京,100190 |
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| 基金项目： | 广东省科技计划基金资助项目（2008A010100003） |
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| 摘 要： | 为了改善无线局域网络服务质量，IEEE工作组形成了增补标准IEEE 802.11e，但是其增强的接入机制仍然不能完全满足IPTV、视频点播等类似场景的应用。为此提出了针对这一类应用场景的一种新的简单易行的下行信道动态无竞争接入机制，该机制基于MAC层队列长度信息动态调整下行信道接入参数，能有效地保护下行流媒体数据的传输，通过仿真结果验证了该机制有效并且实用。
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| 关 键 词： | IEEE 802.11e 增强的分布式信道接入 下行信道 无竞争接入 服务质量 |
Downlink channel dynamic contention free access mechanism based on IEEE 802.11e EDCA |
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| FENG Zheng-yong,WEN Guang-jun,ZHANG Wen-bin,DENG Yun-kai.Downlink channel dynamic contention free access mechanism based on IEEE 802.11e EDCA[J].Application Research of Computers,2010,27(8):3083-3085. |
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| Authors: | FENG Zheng-yong WEN Guang-jun ZHANG Wen-bin DENG Yun-kai |
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| Affiliation: | (1. School of Communication & Information Engineering, University of Electronic Science & Technology of China, Chengdu 611731, China; 2. Institute of Electronics, Chinese Academy of Sciences, Beijing 100190, China) |
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| Abstract: | The IEEE amendment standard IEEE 802.11e was presented for QoS (quality of service) improvement of WLANs, but the enhanced channel access mechanism could not perfectly satisfy the application scenario of IPTV or video on demand. This paper proposed a new easy-implemented downlink channel dyuamic contention free access mechanism for this class of application scenario. This mechanism tuned downlink channel access parameters based on MAC layer queue length and could provide efficient protection for the downlink multimedia stream transmission. Simulation results validate the proposed mechanism is efficient and useful. |
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| Keywords: | IEEE 802 11e EDCA downlink channel contention free access QoS |
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