Packet transmission method and a base station controller

The present invention discloses a packet transmission method and a base station controller, the method comprising the steps of: BSC transmission time point is reached, this is determined to be transmitted to the BTS MAC packet identification in the packets in the ECB; determining the ECB is valid; if judged valid, sends a MAC packet according to the determined packet identifier; if judged invalid, or the MAC packet has been sent, then the packet is filled to the ECB, until filling the ECB ; determining the number of empty packets in the ECB is greater than a predetermined threshold value is invalid; if judged not greater than, the ECB will be set to be valid; if it is determined that greater than, the ECB will be set to inactive, and ECB in the MAC packet back in the BSC. With the technical scheme of the present invention solves the prior art waste more air interface transmission resources.