Patent ID: 8228955

Claim:
A data transmission timing control method in a wireless communication system in which a first transmitting station and a second transmitting station, each having a first plurality of antennas, cooperate with each other to transmit data signals in parallel to the same receiving station having a second plurality of antennas through a series of TDMA slots, the method comprising the steps of: detecting by the second transmitting station, a signal propagation delay time between the first and second transmitting stations and signal propagation delay times between the receiving station and the first and second transmitting stations within a propagation delay time measurement period before a data transmission period; calculating by the second transmitting station, the adjustment amount of data transmission timing for the receiving station based on the signal propagation delay times detected within the propagation delay time measurement period; transmitting data from the first transmitting station to the receiving station at a slot reference timing in each of TDMA slots within the data transmission period; and transmitting data from the second transmitting station to the receiving station at a transmission timing determined by the slot reference timing, the signal propagation delay time between the first and second stations and the adjustment amount in each of TDMA slots within the data transmission period, thereby to synchronize the reception timings of data transmitted in parallel from the first and second transmitting stations each having the first plurality of antennas, within an allowable range of a time difference at the receiving station having the second plurality of antennas.