Proportional Fair MU-MIMO in 802.11 WLANs
V\'ictor Valls, Douglas J. Leith
TL;DR
This paper analyzes proportional fair rate allocation in 802.11 WLANs with MU-MIMO, characterizing how spatial streams and station opportunities should be allocated for optimal fairness.
Contribution
It provides the first characterization of proportional fair allocation of MU-MIMO streams and station opportunities in 802.11 WLANs.
Findings
Stations and flows do not need equal airtime with MU-MIMO.
The allocation involves complex considerations of spatial streams and station opportunities.
MU-MIMO introduces new fairness dynamics compared to non-MU-MIMO scenarios.
Abstract
We consider the proportional fair rate allocation in an 802.11 WLAN that supports multi-user MIMO (MU-MIMO) transmission by one or more stations. We characterise, for the first time, the proportional fair allocation of MU-MIMO spatial streams and station transmission opportunities. While a number of features carry over from the case without MU-MIMO, in general neither flows nor stations need to be allocated equal airtime when MU-MIMO is available.
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