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Understanding WMM Power Save

The 802.11e standard provides for a power save mechanism called Automatic Power Save Delivery (APSD). The Wi-Fi Alliance’s Wi-Fi Multimedia (WMM) specification power save is based on a form of APSD called Unscheduled APSD (U-APSD). The use of U-APSD increases throughput, and it also provides a mechanism for retrieving data on a per access class basis.

Wireless clients set up WMM power save when they associate with the access point. The client selects the access classes (voice, video, best effort, background) that use WMM power save.

WMM power save is enabled by default on the AX411 Access Point; you can disable U-APSD as part of the QoS features. The access point can support both U-APSD clients and legacy power-save clients simultaneously.

Note: Disabling or enabling WMM power save has no effect if WMM is disabled.

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