A wireless data communication system and method using wireless transmission frame structure for increasing communication efficiency are provided. The wireless transmission frame includes a broadcast period, a downlink period, an uplink period, an acknowledgement period and a contention period so as to perform a wireless data communication between a network access toll center and a plurality of stations. The acknowledgement period is a period in which a plurality of stations send an acknowledgement signal confirming safe receipt of data transmitted from the network access toll center to the network access toll center. Through the acknowledgement period, a network access toll center can send data to each station and check whether the data is completely transmitted to each station in the same frame, thereby effectively performing real-time data service. Also, the allocation of a plurality of subcarrier channels to each station minimizes the resending of data because receipt of data is confirmed when at least one of the allocated subcarrier channels is completely transmitted from each station, even if the most part of the subcarrier channels are lost in a wireless interface. |