Siemens SCALANCE W1750D UI User Manual

Wireless Network Profiles
11.4 Multi-User-MIMO
SCALANCE W1750D UI
Configuration Manual, 02/2018, C79000-G8976-C451-02
143
11.4
Multi-User-MIMO
The Multi-User Multiple-Input Multiple-Output (MU-MIMO) feature allows the 802.11ac Wave
2 APs to send multiple frames to multiple clients simultaneously over the same frequency
spectrum. With MU-MIMO, APs can support simultaneous directional Radio Frequency (RF)
links and up to four simultaneous full-rate Wi-Fi connections (For example, smart phone,
tablet, laptop, multimedia player, or other client device).
The MU-MIMO feature is enabled by default on WLAN SSIDs to allow APs to use the MU
beamformer bit in beacon frames to broadcast to clients. When disabled, the MU
beamformer bit is set to unsupported.
Enabling or Disabling MU-MIMO
The MU-MIMO feature is enabled by default on WLAN SSIDs. To disable this feature:
(scalance)(config)# wlan ssid-profile <ssid_profile>
(scalance)(SSID Profile "<ssid_profile>")# vht-mu-txbf-disable
(scalance)(SSID Profile "<ssid_profile>")# end
(scalance)# commit apply
To re-enable MU-MIMO:
(scalance)(config)# wlan ssid-profile <ssid_profile>
(scalance)(SSID Profile "<ssid_profile>")# no vht-mu-txbf-disable
(scalance)(SSID Profile "<ssid_profile>")# end
(scalance)# commit apply
RTS/CTS Flow Control
The (Request to Send) RTS /(Clear to Send) CTS mechanism allows devices to reserve the
RF medium and minimize the frame collisions introduced by hidden stations. When RTS is
enabled, a higher number of retransmissions occurring on the WLAN triggers the RTS/CTS
handshake and the transmitter station sends an RTS frame to the receiver station. The
receiver station responds with a CTS frame. The RTS/CTS frames are sent only when the
packet size exceeds the RTS threshold. By default, the RTS threshold is set to 2333 octets.
Configuring RTS/CTS Threshold
You can set the RTS/CTS threshold value within the range of 0–2347 octets. By default, the
RTS/CTS threshold is set to 2333.
To configure the RTS/CTS threshold:
(scalance)(config)# wlan ssid-profile <ssid_profile>
(scalance)(SSID Profile "<ssid_profile>")# rts-threshold <threshold>
(scalance)(SSID Profile "<ssid_profile>")# end
(scalance)# commit apply
To disable RTS/CTS, set the RTS threshold value to 0.

Siemens SCALANCE W1750D UI Specifications

General

Brand	Siemens
Model	SCALANCE W1750D UI
Category	Wireless Access Point
Language	English