Figure 13: SU-MIMO Omnidirectional antenna vs MU-MIMO beamforming
4) In the process of simultaneous downlink data transmission, in order to avoid co-channel
interference between MU-MIMO clients, these clients need to be separated in physical space to
increase the anti-interference physical isolation.
5) MU-MIMO is aiming at improving the multi-user downlink aggregation throughput, instead of
ensuring each client’s peak throughput. For the client with unqualified SNR, transmission will
automatically fall back to non-MU-MIMO (802.11ac wave1)
In summary, in the actual deployment environment of WLAN, high-capacity and high-concurrent access is
the focus. MU-MIMO technology is designed for this. However, MU-MIMO technology in not an all in one
solution, and reasonable planning and design is the key to take advantage of its benefit.
How to Deploy with 802.11ac Wireless Products
1. Emphasis on planning and design
First step is to plan channel and channel bandwidth, transmit power, and reduce competition and radio
frequency interference on the air, in order to implement an efficient channel multiplexing. Try to arrange
your channels to avoid same frequency or adjacent frequency interference. Also, try to eliminate non-Wi-Fi
system interference.
Second step is to increase the air efficiency within a single channel, that is, to establish a higher data
connection rate between the client and the wireless access point.
In the case where the first step cannot be achieved, simply performing the 2nd step will not cause any great
improvement in network performance!
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