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This study aims to enhance spatial reuse by using the new features of IEEE802.11ax WLANs. Since the wireless medium is a shared medium and there may bemultiple basic service sets (BSS) in the same vicinity, BSSs may overlap, andinterference occurs. In this situation, BSSs cannot transmit simultaneously dueto the exposed node problem. The IEEE 802.11ax standard has a couple ofmechanisms to resolve these spectral efficiency problems. One of the mosteffective mechanisms that address these problems is the overlapping BSSpreamble detection (OBSS/PD) mechanism. OBSS/PD mechanism uses the colormechanism to distinguish OBSS signals. By using a signal threshold, themechanism can ignore some of the signals, which cause interference. In thispaper, we propose a rate-adaptive dynamic OBSS/PD threshold algorithm thattracks the changes in transmission rate and dynamically adjusts the thresholdstep by step considering the changes.

More WiFi for Everyone: Increasing Spectral Efficiency in WiFi6 Networks using OBSS/PD Mechanism