Radio communication system and method for calculating transmission timing between a terminal unit and a base station based upon location, distance, or propagation time
Radio communication system and method capable of expanding the coverage of a radio base station and thereby permitting efficient radio communications. A continuous time slot allocating unit continuously allocates time slots in a frame to generate a continuous time slot. During the period of the continuous time slot, a propagation information calculating unit communicates with a terminal unit to calculate propagation information about radio wave propagation between the radio base station and the terminal unit. Also, during the period of the continuous time slot, a transmission timing calculating unit calculates, based on the propagation information, transmission timing for a signal to be transmitted from the terminal unit to the radio base station. Signal transmitting unit transmits the signal in accordance with the transmission timing.
A method and mobile station (MS) for synchronizing radio signal transmission times in a radiotelephone network. The MS measures a frame reception time for an nth frame, and obtains information regarding an offset between the times of transmission and reception of the nth frame. The MS then calculates a transmission time at the mobile station for the nth data frame using the timing offset information and the measured frame reception time. For a later mth frame, if new timing offset information has been received, the MS calculates a transmission time for the mth frame using the new information and the measured reception time for the mth frame. If new information has not been received, the MS calculates the transmission time based on the difference between the reception times of the nth and mth frames, the number of frames between the nth and mth frames, and the timing offset information obtained at the nth frame.
