PURPOSE: To perform communication of good quality of transmitting a narrow- width burst wave from a mobile station while adjusting a transmission timing position, and then performing normal transmission after receiving confirmation information from a base station.

CONSTITUTION: A transmitted wave from a base station is received by a mobile station with delay. The mobile station transmits a narrow-width burst wave at time lagging the initial position of a specified time slot of the received wave by prescribed time. The base station detects the position of this burst wave in the specified time slot to calculate the timing at which the mobile station performs transmission. Then, the base station transmits information on the timing to the mobile station. On the basis of the timing information, the mobile station adjusts the timing to transmit a burst wave. On coincidence of timing, the base station informs the mobile station of that to complete the acquisition.