Patent ID: 8005515

Claim:
A wireless network device comprising: a transceiver module configured to transition the wireless network device from an inactive mode to an active mode at a wakeup time, wherein the wakeup time is a predetermined time period before a time at which a delivery traffic indication message (DTIM) beacon is expected by the wireless network device; and wherein the wakeup time is based on a clock used by the wireless network device when operating in the inactive mode; a beacon miss module configured to count a number of DTIM beacons missed by the transceiver module during each of a first predetermined period and a second predetermined period, wherein the first predetermined period is shorter than the second predetermined period; and a control module configured to selectively adjust the wakeup time during operation of the wireless network device based on the number of the DTIM beacons missed by the transceiver module during each of the first predetermined period and the second predetermined period.