Patent ID: 8160045

Claim:
A system comprising: a receive module configured to, based on a first clock, transition from a power save mode to an active mode to receive a delivery traffic indication message (DTIM) beacon; a beacon sensing module configured to sense a first number of DTIM beacons missed by the receive module during a first predetermined period; and a control module configured to selectively adjust the first clock when the first number is greater than a first threshold, generate a second number of synchronization requests to adjust the first clock, wherein the second number of synchronization requests are generated (i) during a DTIM beacon interval and (ii) after the first predetermined period, receive data related to a second clock of an access point (AP) from the AP in response to the second number of synchronization requests, update a timing synchronization function (TSF) based on the data, generate an updated TSF, and generate, during the DTIM beacon interval, the second number of synchronization requests in response to a non-DTIM beacon not being received within a second predetermined period.