In the first step, the proposed method makcreateses station clusters so that stations in each cluster have similar expected transmission delays. The proposed method consists of two steps. In this paper, we propose a transmission delay-based uplink multi-user scheduling method. The performance of uplink multi-user transmissions highly depends on the scheduler, and station scheduling is still an open research area in IEEE-802.11ax-based networks. To avoid excessive competition among stations and enhance the uplink throughput performance, the IEEE 802.11ax standard supports uplink multi-user transmission scenarios, in which AP triggers certain stations in a network to transmit uplink data simultaneously. As the demands for uplink traffic increase, improving the uplink throughput has attracted research attention in IEEE 802.11 networks.
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