Channel data transmission method and system in a wireless network

The present invention discloses a channel data transmission method and system in a wireless network, comprising: transmitting station and the receiving station through an interactive consultation after channel bandwidth use for data transmission, the transmitting station to determine the channel bandwidth to transmit data to the receiving station. The present invention is a data transmission for large existing multichannel bandwidth, the proposed data transmission scheme based on variable bandwidth in data frames, in order to solve the conventional hidden station and the current transmission channel site competition caused by collision problem, it is possible to fully utilize the effective transmission bandwidth of the wireless network system in large bandwidth, large bandwidth increase spectrum efficiency, while ensuring backward compatibility and coexistence with legacy systems is the large bandwidth systems.