In Wi-Fi 6, both OFDMA and MU-MIMO are used to improve multi-user concurrent service experience...

Wi-Fi 6 leverages Orthogonal Frequency Division Multiple Access (OFDMA) and Multi-User Multiple-Input Multiple-Output (MU-MIMO) to enhance multi-user performance. The HCSP-Presales-Campus Network Planning and Design V1.0 documentation clarifies their roles:

OFDMA: Divides frequency resources into smaller subcarriers (resource units), allowing multiple users to transmit simultaneously. It excels in small-packet transmission scenarios (e.g., IoT devices, VoIP) due to its ability to efficiently allocate bandwidth for low-data-rate streams.