An AP operating as a target wakeup time (TWT) scheduling access point (AP) may
encode broadcast TWT elements for transmission to advertise a broadcast TWT having one or more broadcast TWT service cycles (SPs). When the broadcast TWT element carries one or more broadcast TWT parameter set fields having a broadcast TWT ID subfield equal to zero, and having a responder
power management (PM) mode subfield equal to one, the AP may set an NDP
paging indicator / unavailable mode subfield of a control field of the broadcast TWT element to a value of zero to indicate that the AP is unavailable outside of the one or more broadcast TWT SPs, and may set the NDP
paging indicator / unavailable mode subfield of the control field of the broadcast TWT element to a value of zero. In addition to other TWT SPs established with or advertised by the AP. The AP may set an NDP
paging indicator / unavailable mode subfield of the control field to a value one to indicate that the AP is unavailable outside of one or more broadcast TWT SPs, including during any time that falls within other TWT SPs established with or advertised by the AP.