As defined in the 802.11 specification, legacy Power Save requires an inefficient back-and-forth frame exchange process. Due to this inefficiency, many WLAN device implementations use a variation of…

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Options

• AClient devices ignore the TIM field and automatically send PS-Poll frames after every beacon.
• BAfter each beacon, the AP attempts to empty its frame buffer by sending Wake-on-WLAN frames
• CRequest-to-Send and Clear-to-Send frame exchanges are used to trigger the delivery of buffered
• DThe Beacon interval is changed from the default 100 time units to 10 or less time units.
• EClients send null data frames to the AP and switch the power management bit from 1 to 0 to
• FStations send a CTS-to-self frame to the AP with a very long duration period so they can receive

• A
  2% (1)
• B
  3% (2)
• C
  10% (6)
• D
  7% (4)
• E
  78% (47)

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