WLAN Downlink Throughput Enhancement in Conference Rooms Using a Multi-Antenna Access Point

Abstract:
This paper explores the enhancement of WLAN downlink throughput in a conference room environment using a multiantenna access point. The downlink transmission uses antenna patterns to spatially separate multiple users so that they can be served simultaneously, rather than sequentially, thereby speeding up the downlink throughput. This can be useful when several users are attempting to download long documents at the same time and sequential transmission causes a throughput bottleneck. A theoretical analysis with a room response model is used to obtain the statistics of separability in terms of minimum signal-to-interference-plus-noise ratio (SINR). It is shown that for this modeled conference room environment, a two-antenna access point can theoretically deliver a twouser minimum SINR of 18 dB for about 80% of the realizations, which would, neglecting overhead, likewise increase the throughput by 80%.