Patent ID: 8565213

Claim:
A method of estimating UpLink (UL) transmission timing in a Mobile Station (MS) of a wireless communication system, the method comprising: tracking DownLink (DL) timing by using a DL preamble signal received for each frame; estimating a time offset between a previous DL frame and a current DL frame by using the DL timing tracked for each frame; and estimating the UL transmission timing by using the estimated time offset; wherein, estimating the time offset between the previous DL frame and the current DL frame comprises estimating a difference between a propagation delay time of the current DL frame and a propagation delay time of the previous DL frame; and wherein the estimating the UL transmission timing by using the estimated time offset comprises calculating a time regulation value by using the estimated time offset and subtracting the time regulation value from a time interval between an end time of the previous DL frame and a start time of a previous UL frame.