Data transmission method and mobile telephone system

The invention relates to a a mobile telephone system sub-system network (RNS) is user equipment (UE) data transmission method, network sub-system (RNS), and user equipment (UE). The method, network sub-system (RNS) to transmit the special control channel to user equipment (UE (606), and a different data transmission rate to user equipment (UE) for special channels service flow passage (610). During transmission network, sub-system (RNS) wherein each channel by extending code (608,612), according to the lower data transmission rate conversion the expansion code (602) is activate channel service. To the invention, the expansion code of the control channel the frame is corresponding to the channels service flow channel frame while the expansion code for using transmission.