Hello, everyone!
As a supplement to the ONT basic knowledge, I begin to introduce a series of basic Wi-Fi knowledge.
Today, I will share knowledge about UL MU-MIMO and DL MU-MIMO.
Uplink MU-MIMO (UL MU-MIMO)
UL MU-MIMO is an important feature introduced in Wi-Fi 6. UL MU-MIMO uses the multi-antenna technology of the transmitter and receiver to transmit data simultaneously on multiple spatial streams over the same channel. Multiple data streams in UL MU-MIMO come from multiple users. In Wi-Fi 5 and earlier versions, UL SU MIMO is used, that is, data from only one user can be received. The efficiency is low in multi-user concurrency scenarios. After supporting UL MU-MIMO and the UL OFDMA technologies, Wi-Fi 6 can perform MU-MIMO transmission and allocate different RUs for multi-user multiple-access transmission, improving the efficiency in multi-user concurrent scenarios and greatly reducing the application latency.
Downlink MU-MIMO (DL MU-MIMO)
Wi-Fi 5 has introduced MU-MIMO, but supports only 4x4 downlink MU-MIMO. In Wi-Fi 6, MU-MIMO is further increased to 8x8 downlink MU-MIMO. Thanks to the DL OFDMA technology, MU-MIMO transmission can be performed at the same time and different RUs can be allocated for multi-user multiple-access transmission, which not only increases the concurrent access capacity but also balances the throughput.
For more information about Wifi 6, you can refer to the following link: What is Wi-Fi 6
That's all for today's basic knowledge sharing.
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