Patent ID: 7974263
Filing Date: 2011-07-05
Classification: G04R,H04W

Abstract:
1. A method for calculating a current time in a mobile communication system, comprising the steps of: receiving time information transmitted from a base station; obtaining date information and parameters for calculation of time on the basis of the received time information; calculating a lapse time length from a reference time on the basis of the parameters; calculating a current time using the calculated lapse time length and the date information, wherein the time information contains T wherein the step of calculating the lapse time length on the basis of the parameters comprises: calculating a first time length from the reference time to a start of a complete hyperframe structure on the basis of a frame number from which the reference time starts; calculating a second time length from the start to the end of the complete hyperframe structure; calculating the lapse time length from a end of the complete hyperframe structure to the current time; and adding the first time length, the second time length and the lapse time length, and wherein the step of calculating the first time length comprises: calculating the frame number from which the reference time starts, using the values of T where if (T subtracting the start frame number from a maximum value of the frame number to obtain the number of frames and multiplying the obtained number by the time length of one frame.