The method for controlling data transmission is disclosed. The method comprising the steps of the method RNC obtains the difference between themselves and the base station between the transmission delay time, the RNC configuring cells and a common channel for data transmission, the method comprising: the RNC controls the data transfer time in each cell and, a step of the method is that the RNC informing the frame offset and a chip offset of a common channel over the Uu interface to the UE, the UE receives the configuration parameters of the common channel sent from the RNC. According to the method, whereby the signals transmitted from different cells over a common channel merging, and the quality of the signal received at the UE can be improved, it is possible to expand the system's throughput. MBMS, RNC, UE, Node B, BFN, CFN, SFN