D-MIMOO – Distributed MIMO for Office Wi-Fi Networks

摘要

We present D-MIMOO, a distributed MIMO Wi-Fi architecture that boosts average network throughput compared to state-of-the-art access points with co-located antennas (baseline configuration). Designing a distributed MIMO system invites us to redesign fundamental Wi-Fi concepts, such as carrier sensing multiple access (CSMA) which governs channel access among Wi-Fi access points. We also propose a novel way of using channel reciprocity and the network topology to select downlink MU-MIMO recipients. The proposed solutions are standards compliant, do not require modifications at the user equipment and hence will work with legacy 802.11ac devices. We compare the performance of the D-MIMOO architecture to a baseline dense enterprise Wi-Fi deployment, and observe 2.5× improvement in median and 104% increase in average downlink per-stream throughput.