Transmission method and the frame sequence number of the node b, and the serving radio network controller

The present invention discloses a method for transmitting a frame sequence number and the Node B and serving radio network controller, the method comprising: receiving from the Node B to the carrier protocol data units, protocol data unit and demultiplexed into a media access control data stream; carrier indicator field set the node B enhanced data channel data frame to a carrier, enhanced data channel data each time on and carrier transmission frame generating frame sequence number; node B medium access control data stream reinforcement data channel data frame to the serving radio network controller SRNC, through the present invention it is achieved that a very good idea SRNC transport network layer of the dual-carrier data transmission case, the frame protocol frame to detect the data loss problem effect.