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Turkish Journal of Electrical Engineering and Computer Sciences

DOI

10.55730/1300-0632.4008

Abstract

In this paper, we propose a distributed algorithm that determines effective Overlapping Basic Service Set/Preamble Detection (OBSS/PD) threshold levels in each WiFi6 device to maximize the total throughput by increasing the spectral efficiency. Within WiFi6 standard, OBSS/PD mechanism is introduced to increase the overall efficiency of WiFi networks by tuning the receiver sensitivity as well as the transmission power. In a nutshell, the proposed algorithm, RACEBOT, tunes the hearing (i.e. reception) and speaking (i.e. transmission) parameters of each WiFi device individually for the betterment of the WiFi experience of all WiFi networks in a neighborhood. WiFi experience is not only affected by the spectral efficiency but also by the so-called rate selection algorithms that aims to select the ideal modulation and coding levels according to the ever-changing channel conditions. For higher flexibility, the proposed algorithm works agnostically to the selected rate selection mechanism. Moreover, RACEBOT is a distributed algorithm working independently in all WiFi devices in a given environment. We have conducted extensive simulations in NS3 to evaluate the performance of our proposed algorithm and compare its results with other prominent carrier sensitivity threshold algorithms, both pre-WiFi6 and post-WiFi6. Our results show that RACEBOT outperforms its competitors the RTOT and DSC algorithms in terms of aggregate throughput by 10%-20% in dense networks and 5%-10% in sparse networks considering modern rate selection algorithms such as Thompson.

Keywords

WiFi, 802.11ax, OBSS/PD, spectral efficiency

First Page

660

Last Page

677

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