On Tue, Sep 27, 2016 at 12:03 PM, Gucea Doru <gucea.doru@xxxxxxxxx> wrote: > What is the decision triggering the exit from the PS mode immediately > after the ping request? I am asking this because 802.11 PS legacy > specifies that the client should wait for a beacon with TIM set in > order to wake up: in my case, there is no beacon between the ping > request message and the Null frame that announces the exit from the PS > mode. Any help would be highly appreciated :) IEEE Std 802.11-2012, section 10.2.1.8 specifies that "when the STA detects that the bit corresponding to its AID is 1 i the TIM, the STA shall issue a PS Poll". In my capture there are cases when the STA exits the PS mode without waiting for a beacon. Thanks!