IEEE 802.11ax中压缩块确认的性能分析

Jan Friedrich, S. Günther, C. Lindemann
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引用次数: 4

摘要

IEEE 802.11ax利用帧聚合和压缩块确认来减少MAC开销并增加good - put。我们分析了IEEE 802.11ax在易出错环境下的帧聚合,并提出了自适应限制MPDU大小的方法。这导致MAC帧仍然足够小,以具有较高的传输成功率。使用离散事件模拟器ns-3进行的性能研究说明了所提出方法的优点。我们发现高重传率导致确认窗口的低利用率,并讨论了其对商品投放的主要负面影响。我们的延迟相关研究进一步表明,像严格排序这样的MAC机制不成比例地增加了由于排队阻塞导致的延迟,特别是在高错误率条件下。我们得出结论,对于减少延迟,较小的mpdu是有益的。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Performance Analysis of Compressed Block Acknowledgment in IEEE 802.11ax
IEEE 802.11ax utilizes frame aggregation and compressed block acknowledgements to reduce the MAC overhead and to increase the goodput. We analyze IEEE 802.11ax frame aggregation in error-prone environments and propose to adaptively limit the MPDU size. This results in MAC frames that are still small enough to have a high transmission success rate. A performance study using the discrete-event simulator ns-3 illustrates the benefits of the proposed approach. We find that a high retransmission rate results in a low utilization of the acknowledgment window and discuss its major negative impact on the goodput. Our delay-related studies further show that MAC mechanisms like strict ordering contribute disproportionally to increased latency due to head-of-line blocking, especially under high error rate conditions. We conclude that for decreased delays, smaller MPDUs are beneficial.
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