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Evaluation of RTOT algorithm: a first implementation of OBSS_PD-based SR method for IEEE 802.11ax

Published

Author(s)

Tanguy Ropitault

Abstract

The main goal of the IEEE 802.11ax project is to improve the network efficiency of IEEE 802.11 systems in dense deployments. There are currently several methods under consideration in the IEEE 802.11ax task group to achieve the aforementioned goal, including Multi-User Multiple Input Multiple Output (MU-MIMO), Multiple Packet Data Unit-aggregation, channel bonding, in addition to several Spatial Reuse (SR) improvements. In this paper, we focus on the SR improvements methods and more specifically on one of the proposed solution at IEEE to improve SR for 802.11ax, the so-called Overlap Basic Service Set Physical Detection (OBSS_PD)-based SR. This solution combines adjusting the power transmission and Carrier Sense Threshold (CST) in order to increase the number of successful concurrent transmissions in dense networks. In this article, we propose and evaluate the RSSI To OBSS Threshold (RTOT) algorithm. RTOT uses the beacon Received Signal Strenght Indicator (RSSI) to dynamically compute the CST, before to derive afterwards the transmission power to use. We evaluate RTOT algorithm by simulation in a dense scenario. We show that the overall system throughput can be improved up to 80% compared to IEEE 802.11 legacy networks. We highlight that the overall throughput improvement comes at the expense of per-station throughput, and thus the fairness among stations is severely compromised. A trade-off must be considered between maximizing the overall throughout and maintaining an acceptable per-station throughput.
Conference Dates
January 12-15, 2018
Conference Location
Las Vegas, NV, US
Conference Title
2018 15th IEEE Annual Consumer Communications & Networking Conference (CCNC)

Keywords

Spatial-Reuse, 802.11ax

Citation

Ropitault, T. (2018), Evaluation of RTOT algorithm: a first implementation of OBSS_PD-based SR method for IEEE 802.11ax, 2018 15th IEEE Annual Consumer Communications & Networking Conference (CCNC), Las Vegas, NV, US (Accessed June 13, 2024)

Issues

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Created March 19, 2018, Updated December 14, 2023