938 research outputs found
IEEE 802.11ax: challenges and requirements for future high efficiency wifi
The popularity of IEEE 802.11 based wireless local area networks (WLANs) has increased significantly in recent years because of their ability to provide increased mobility, flexibility, and ease of use, with reduced cost of installation and maintenance. This has resulted in massive WLAN deployment in geographically limited environments that encompass multiple overlapping basic service sets (OBSSs). In this article, we introduce IEEE 802.11ax, a new standard being developed by the IEEE 802.11 Working Group, which will enable efficient usage of spectrum along with an enhanced user experience. We expose advanced technological enhancements proposed to improve the efficiency within high density WLAN networks and explore the key challenges to the upcoming amendment.Peer ReviewedPostprint (author's final draft
WLAN Channel Selection Without Communication
In this paper we consider how a group of wireless
access-points can self-configure their channel choice so as to
avoid interference between one another and thereby maximise
network capacity. We make the observation that communication
between access points is not necessary, although it is a feature
of almost all published channel allocation algorithms. We argue
that this observation is of key practical importance as, except
in special circumstances, interfering WLANs need not all lie
in the same administrative domain and/or may be beyond
wireless communication distance (although within interference
distance). We demonstrate the feasibility of the communicationfree
paradigm via a new class of decentralized algorithms that
are simple, robust and provably correct for arbitrary interference
graphs. The algorithm requires only standard hardware and we
demonstrate its effectiveness via experimental measurements
Usage of Network Simulators in Machine-Learning-Assisted 5G/6G Networks
Without any doubt, Machine Learning (ML) will be an important driver of
future communications due to its foreseen performance when applied to complex
problems. However, the application of ML to networking systems raises concerns
among network operators and other stakeholders, especially regarding
trustworthiness and reliability. In this paper, we devise the role of network
simulators for bridging the gap between ML and communications systems. In
particular, we present an architectural integration of simulators in ML-aware
networks for training, testing, and validating ML models before being applied
to the operative network. Moreover, we provide insights on the main challenges
resulting from this integration, and then give hints discussing how they can be
overcome. Finally, we illustrate the integration of network simulators into
ML-assisted communications through a proof-of-concept testbed implementation of
a residential Wi-Fi network
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