  In this paper we suggest three scheduling strategies for the IEEE 802.11ax
transmis- sion of DL unidirectional TCP data from the Access Point to stations.
Two strategies are based on the Single User operation mode and one is based on
the Multi User operation mode, using Multi User Multiple-Input-Multiple-Output
(MU-MIMO) and OFDMA. We measure the Goodput of the system as a function of the
time intervals over which these Goodputs are received in all three strategies.
For up to 8 stations the MU strategy outperforms the SU. For 16 and 32 stations
it is not clear whether MU outperforms SU or vice versa. For 64 stations the SU
strategies outperform the MU significantly. We also checked the influence of
the Delayed Acks feature on the received Goodputs and found that this feature
has significance only when the TCP data segments are relatively short.
