Patent ID: 8340237

Claim:
A wireless communication method of conducting wireless communication between a mobile station and a base station by using an OFDM modulation scheme, the method comprising: notifying a notification channel from the base station to the mobile station; in the mobile station, generating a channel to be frame synchronized with the notification channel and transmitting an OFDM symbol to the base station; in the base station, as peak detection processes thereof, removing a guard interval from the transmitted OFDM symbol to obtain an effective symbol; detecting a correlation peak between the effective symbol and a known ideal symbol; and only when the correlation peak is detected in a predetermined timing detection range shorter than a length of the effective symbol, transmitting a differential between reference timing of the base station and the time of the detection of the correlation peak to the mobile station by means of a timing correction burst; in the mobile station, if the timing correction burst is not introduced from the base station even after expiration of predetermined time duration from the transmission of the OFDM symbol to the base station, copying a signal by a length different from a guard interval from the end of an effective symbol and adding the copied signal to the front of the effective symbol to shift transmission timing of a previously generated channel by a predetermined shift amount so as to generate a new channel having the shifted transmission timing; and transmitting an OFDM symbol to the base station to implement the peak detection processes of the base station again, and if the timing correction burst is introduced from the base station within the predetermined time, correcting transmission timing by calculating a sum of shift amounts of transmission timing to the present time in order to solve a differential from reference timing of the base station; and transmitting a communication channel assignment request to the base station at the corrected transmission timing.