When compared with legacy Power Save mode, how does VHT TXOP power save improve battery life for devices on a WLAN?

The correct answer is B. VHT TXOP power save uses the partial AID in the preamble to allow clients to identify frames. Until the end of the current TXOP, the client may enter the doze state under specific conditions, using some information such as the RXVECTOR parameter PARTIAL_AID (a TXOP SU PPDU that is addressed to another client, but not that client) or the RXVECTOR parameter GROUP_ID for…

802.11 MAC and Physical Layers

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AVHT TXOP power save allows stations to enter sleep mode and legacy Power Save does not.
BVHT TXOP power save uses the partial AID in the preamble to allow clients to identify frames
CLegacy Power Save mode was removed in the 802.11ac amendment.
DVHT TXOP power save allows the WLAN transceiver to disable more components when in a low

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Explanation

Until the end of the current TXOP, the client may enter the doze state under specific conditions, using some information such as the RXVECTOR parameter PARTIAL_AID (a TXOP SU PPDU that is addressed to another client, but not that client) or the RXVECTOR parameter GROUP_ID for MU-MIMO (a VHT MU PPDU that is not intended to that client). https://dot11zen.blogspot.com/2018/02/80211-power-management-with-packet.html

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#VHT TXOP power save#partial AID#legacy power save#battery life

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