Issues and Challenges in Dense WiFi Networks

Zhong, Z; Kulkarni, P; Cao, F; Fan, Z; Armour, S

Abstract

The IEEE 802.11 Working Group has initiated a new study group known as IEEE 802.11ax which is aiming to devise ways to improve spectrum efficiency, in particular to enhance the system throughput in highly dense scenarios, frequently referred to as Overlapped Basic Service Set (OBSS). In this paper we revisit some of the common problems faced in traditional WiFi networks and show how their effects could be amplified in dense deployments, especially in co-channel scenarios. We then highlight our findings through a simulation based study and draw inferences from these. Some of the key insights from this study are: link suppression and deadlock effects could potentially amplify in co-channel deployments thereby significantly degrading the throughput performance. Also, increasing the concentration of APs in a given area may not always lead to better performance and therefore AP placement needs to be carefully managed in OBSS scenarios. Where AP placement cannot be controlled due to unmanaged environments, findings indicate the need for intelligent load balancing and channel selection algorithms to minimize the impact of the aforementioned effects.

Citation

Zhong, Z., Kulkarni, P., Cao, F., Fan, Z., & Armour, S. (2015, August). Issues and Challenges in Dense WiFi Networks. Presented at 2015 INTERNATIONAL WIRELESS COMMUNICATIONS & MOBILE COMPUTING CONFERENCE (IWCMC, Dubrovnik, Croatia

• Presentation Conference Type: Conference Paper (published)
• Conference Name: 2015 INTERNATIONAL WIRELESS COMMUNICATIONS & MOBILE COMPUTING CONFERENCE (IWCMC
• Start Date: Aug 24, 2015
• End Date: Aug 28, 2015
• Acceptance Date: Aug 24, 2015
• Online Publication Date: Oct 5, 2015
• Publication Date: Oct 5, 2015
• Deposit Date: Jun 15, 2023
• Journal: International Wireless Communications and Mobile Computing Conference, IWCMC
• Publisher: Institute of Electrical and Electronics Engineers (IEEE)
• Peer Reviewed: Peer Reviewed
• DOI: https://doi.org/10.1109/IWCMC.2015.7289210
• Public URL: https://keele-repository.worktribe.com/output/460750
• Publisher URL: https://ieeexplore.ieee.org/document/7289210