Spatial reuse in IEEE 802.11ax WLANs

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• dc.contributor.author Wilhelmi Roca, Francesc
• dc.contributor.author Barrachina Muñoz, Sergio
• dc.contributor.author Cano Bastidas, Cristina
• dc.contributor.author Selinis, Ioannis
• dc.contributor.author Bellalta, Boris
• dc.date.accessioned 2021-04-08T09:25:52Z
• dc.date.issued 2021
• dc.description.abstract Dealing with massively crowded scenarios is one of the most ambitious goals of next-generation wireless networks. With this goal in mind, the IEEE 802.11ax amendment includes, among other techniques, the Spatial Reuse (SR) operation. The SR operation encompasses a set of unprecedented techniques that are expected to significantly boost Wireless Local Area Networks (WLANs) performance in dense environments. In particular, the main objective of the SR operation is to maximize the utilization of the medium by increasing the number of parallel transmissions. Nevertheless, due to the novelty of the operation, its performance gains remain largely unknown. In this paper, we first provide a gentle tutorial of the SR operation included in the IEEE 802.11ax. Then, we analytically model SR and delve into the new kinds of MAC-level interactions among network devices. Finally, we provide a simulation-driven analysis to showcase the potential of SR in various deployments, comprising different network densities and traffic loads. Our results show that the SR operation can significantly improve the medium utilization, especially in scenarios under high interference conditions. Moreover, our results demonstrate the non-intrusive design characteristic of SR, which allows enhancing the number of simultaneous transmissions with a low impact on the environment. We conclude the paper by giving some thoughts on the main challenges and limitations of the IEEE 802.11ax SR operation, including research gaps and future directions.
• dc.description.sponsorship This work has been partially supported by the Spanish Ministry of Economy and Competitiveness under the Maria de Maeztu Units of Excellence Programme (MDM-2015-0502), by PGC2018-099959-B-100 (MCIU/AEI/FEDER,UE), by the Catalan Government under SGR grant for research support (2017-SGR-11888), by SPOTS project (RTI2018-095438-AI00) funded by the Spanish Ministry of Science, Innovation and Universities, and by a Gift from the Cisco University Research Program (CG#890107, Towards Deterministic Channel Access in High-Density WLANs) Fund, a corporate advised fund of Silicon Valley Community Foundation. The authors would like to thank Malcolm Smith and Adrian Garcia for their thorough reviews and insightful comments.
• dc.format.mimetype application/pdf
• dc.identifier.citation Wilhelmi F, Barrachina-Muñoz S, Cano C, Selinis I, Bellalta B. Spatial reuse in IEEE 802.11ax WLANs. Comput Commun. 2021 Mar 15;170:65-83. DOI: 10.1016/j.comcom.2021.01.028
• dc.identifier.doi http://dx.doi.org/10.1016/j.comcom.2021.01.028
• dc.identifier.issn 0140-3664
• dc.identifier.uri http://hdl.handle.net/10230/47051
• dc.language.iso eng
• dc.publisher Elsevier
• dc.relation.ispartof Computer Communications. 2021 Mar 15;170:65-83
• dc.relation.projectID info:eu-repo/grantAgreement/ES/2PE/PGC2018-099959-B-100
• dc.relation.projectID info:eu-repo/grantAgreement/ES/2PE/RTI2018-095438-AI00
• dc.rights © Elsevier http://dx.doi.org/10.1016/j.comcom.2021.01.028
• dc.rights.accessRights info:eu-repo/semantics/openAccess
• dc.subject.keyword Dense deployment
• dc.subject.keyword IEEE 802.11ax WLAN
• dc.subject.keyword Next-generation networks
• dc.subject.keyword Performance evaluation
• dc.subject.keyword Spatial Reuse
• dc.subject.keyword Tutorial
• dc.title Spatial reuse in IEEE 802.11ax WLANs
• dc.type info:eu-repo/semantics/article
• dc.type.version info:eu-repo/semantics/acceptedVersion