An apparatus, comprising: at least one communication interface configured to receive a first signal from an access point; and a processor configured to: analyze the first signal to determine whether or not the AP has undergone a restart or reset; determine whether or not the first signal includes a request for a timing synchronization function value from the apparatus based on a singular bit within the first signal being set to a predetermined value; and upon determination that the AP has undergone the restart or reset and upon determination that the first signal includes the request for the TSF value from the apparatus, generate a second signal that includes the TSF value from the apparatus; and wherein: the at least one communication interface configured to transmit the second signal to the AP; the apparatus being one wireless station of a plurality of wireless stations (STAs); before the AP has undergone the restart or reset, the plurality of STAs configured to awaken respectively at a first plurality of target wake times (TWTs) in accordance with a first schedule; and after the AP has undergone the restart or reset, the plurality of STAs configured to awaken respectively at a second plurality of TWTs in accordance with a second schedule. at least one communication interface configured to receive a first signal from an access point; and a processor configured to: analyze the first signal to determine whether or not the AP has undergone a restart or reset; determine whether or not the first signal includes a request for a timing synchronization function value from the apparatus based on a singular bit within the first signal being set to a predetermined value; and upon determination that the AP has undergone the restart or reset and upon determination that the first signal includes the request for the TSF value from the apparatus, generate a second signal that includes the TSF value from the apparatus; and wherein: the at least one communication interface configured to transmit the second signal to the AP; the apparatus being one wireless station of a plurality of wireless stations (STAs); before the AP has undergone the restart or reset, the plurality of STAs configured to awaken respectively at a first plurality of target wake times (TWTs) in accordance with a first schedule; and after the AP has undergone the restart or reset, the plurality of STAs configured to awaken respectively at a second plurality of TWTs in accordance with a second schedule. analyze the first signal to determine whether or not the AP has undergone a restart or reset; determine whether or not the first signal includes a request for a timing synchronization function value from the apparatus based on a singular bit within the first signal being set to a predetermined value; and upon determination that the AP has undergone the restart or reset and upon determination that the first signal includes the request for the TSF value from the apparatus, generate a second signal that includes the TSF value from the apparatus; and wherein: the at least one communication interface configured to transmit the second signal to the AP; the apparatus being one wireless station of a plurality of wireless stations (STAs); before the AP has undergone the restart or reset, the plurality of STAs configured to awaken respectively at a first plurality of target wake times (TWTs) in accordance with a first schedule; and after the AP has undergone the restart or reset, the plurality of STAs configured to awaken respectively at a second plurality of TWTs in accordance with a second schedule. the at least one communication interface configured to transmit the second signal to the AP; the apparatus being one wireless station of a plurality of wireless stations (STAs); before the AP has undergone the restart or reset, the plurality of STAs configured to awaken respectively at a first plurality of target wake times (TWTs) in accordance with a first schedule; and after the AP has undergone the restart or reset, the plurality of STAs configured to awaken respectively at a second plurality of TWTs in accordance with a second schedule.