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Wireless & Mobility · Advanced

PS-Poll

A control frame sent by a power-saving client to retrieve one buffered frame from the AP.

Definition

After seeing its AID in the TIM, a legacy power-save client sends a PS-Poll to request a buffered unicast frame. The AP replies with data, and the More Data bit indicates if more remain. WMM Power Save (U-APSD) is more efficient.

Exam tip

PS-Poll retrieves one frame at a time.

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