用于高容量无线局域网的高性能MAC

Yuan Yuan, Daqing Gu, W. Arbaugh, Jinyun Zhang
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引用次数: 25

摘要

下一代无线技术,例如802.11n和802.15.3a,提供的物理层速度至少比当前标准高一个数量级。然而,直接应用当前mac会导致高协议开销和显著的吞吐量下降。本文提出了一种基于高容量物理层的高性能MAC——ADCA。ADCA利用自适应批量传输和机会选择高速率主机两种思想,同时降低了开销,提高了总吞吐量。它通过提供更高的访问概率和更多的访问时间来机会地支持高速率主机,同时确保每个低速率主机有一定的最小通道访问时间。仿真结果表明,与传统的DCF相比,ADCA设计的吞吐量提高了112%,平均延迟降低了55%。与传统MAC提供的35 Mbps相比,它提供了超过100 Mbps的MAC层吞吐量
本文章由计算机程序翻译,如有差异,请以英文原文为准。
High-performance MAC for high-capacity wireless LANs
The next-generation wireless technologies, e.g., 802.11n and 802.15.3a, offer a physical-layer speed at least an-order-of-magnitude higher than the current standards. However, direct application of current MACs leads to high protocol overhead and significant throughput degradation. In this paper, we propose ADCA, a high-performance MAC that works with high-capacity physical layer. ADCA exploits two ideas of adaptive batch transmission and opportunistic selection of high-rate hosts to simultaneously reduce the overhead and improve the aggregate throughput. It opportunistically favors high-rate hosts by providing higher access probability and more access time, while ensuring each low-rate host certain minimum amount of channel access time. Simulations show that the ADCA design increases the throughput by 112% and reduces the average delay by 55% compared with the legacy DCF. It delivers more than 100 Mbps MAC-layer throughput as compared with 35 Mbps offered by the legacy MAC
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