公开(公告)号：US20130122971A1

公开(公告)日：2013-05-16

申请号：US13730651

申请日：2012-12-28

Applicant: APPLE INC.

Inventor： TITO THOMAS ,  PIERRE VANDWALLE ,  CHARLES FRANCIS DOMINGUEZ ,  TASHBEEB HAQUE

IPC: H04W52/02

CPC classification number: H04W52/0209 ,  H04W52/02 ,  H04W52/0216 ,  H04W76/38 ,  Y02D70/142 ,  Y02D70/144 ,  Y02D70/146

Abstract: Methods and apparatuses for operating a wireless mobile station configured to communicate with a wireless access point are described. A first awake timer may be started in response to receiving a beacon signal from the wireless access point. The beacon signal may indicate that data is available or pending for the wireless mobile station. A second awake timer may be started in response to data received from the wireless access point. When the second awake timer expires, the wireless mobile station may return to the sleep state. In one embodiment, the first awake timer counts for a first period of time and the second awake timer counts for a second period of time which is shorter than the first period of time. The RF radio may be in a higher power state when the first and/or the second awake timers are counting. In one embodiment, the wireless mobile station and the wireless access points may be synchronized using target beacon transmission times of the beacon signal.