Service data transmission method, service data transmission device, control equipment and communication system

The invention provides a service data transmission method, a service data transmission device, control equipment and a communication system. The service data transmission method comprises the steps of receiving a user adhesion request which is transmitted from a base station; selecting data transfer equipment from a plurality of sets of data transfer equipment according to the user adhesion request; performing interaction with the selected transfer equipment and the base station, and performing transmission of uplink and downlink service data between a network and user equipment. The service data transmission method, the service data transmission device, the control equipment and the communication system have advantages of selecting the data transfer equipment which satisfies the user adhesion request, realizing direct interaction with the selected data transfer equipment and the base station, reducing signaling interaction and saving signaling processing time.