摘要(英) |
IEEE 802.11ax, the new generation of Wi-Fi (Wireless Fidelity) standard launched by IEEE, establishes more and more APs to serve STAs in the environment. In the meantime, it creates the problem of Overlapping BSS (OBSS), resulting in channel congestion, so that the data cannot be transmitted on time, reducing the service quality. 802.11ax proposes the mechanism of Spatial Reuse (SR) to solve this problem.
The SR aims to increase the simultaneous transmissions to avoid wasting resources; however, it has to meet certain conditions; otherwise, it will cause too much interference in the original transmission and thus fail. In the mechanism of Wi-Fi transmission, STA needs to identify the channel idle to compete for transmission with DCF mechanism. 802.11ax adds adjustable thresholds, and how to adjust threshold will be one of the important issues.
The design of SR in this thesis aims to improve uplink transmission. According to the information provided by beacon transmitted from AP at the beginning, STA can define the located area, then based on the different areas, establish STA parameter to adjust the threshold to increase the possibility of STA participating in the competition, so that it elevates the system performance. |
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