Performance improvement has been among the foci of all previous amendments of IEEE 802.11 protocol. In addition, the draft high efficiency (HE) amendment IEEE 802.11ax, proposed by TGax, aims at increasing network performance. One of the main obstacles to improving spectral and power efficiency is the presence of hidden terminals which degrade throughput, in particular in uplink transmission. IEEE 802.11ax does provide mechanisms such as trigger based uplink transmission that mitigate this degradation to some extent, but are incapable of eliminating it, esp. at high arrival rates. To combat the hidden terminal problem, we propose to increase the carrier sensing threshold (CSTH) of STAs during association with an HE access point. Our results confirm that the proposed mechanism can lead to significant reduction of collision probability in uplink transmission.
翻译:改进性能是以前IEEE 802.11议定书所有修正的要点之一,此外,TGax提出的高效率IEE 802.11ax(HE)修正案草案旨在提高网络性能,提高光谱和功率的主要障碍之一是存在能降解吞吐量的隐藏终端,特别是在上链传输方面。IEE 802.11ax确实提供了一些机制,例如触发连接传输,在一定程度上减轻这种退化,但无法消除,例如,在高抵达率的情况下。为了解决隐藏的终端问题,我们提议在与HE接入点连接期间提高STAs承运人的感测阈值。我们的结果证实,拟议的机制可以大大减少上链传输的碰撞概率。