Method for base station to adjust downlink guarantee bit rate

The invention discloses a method for self-adjusting descending guarantee bit rate of a base station, comprising following steps: step S102, a radio network controller allocates the signed descending guarantee bit rate of the base station Mac-hs layer to the base station; step S104, when the streaming media planar source play speed is less than the signed descending guarantee bit rate, making the second signed descending guarantee bit rate be equal to the signed descending guarantee bit rate; step S106, when the actual average dispatching speed of the base station Mac-hs layer is less than thesecond signed descending guarantee bit rate, making the second signed descending guarantee bit rate be equal to the actual average dispatching speed of the base station Mac-hs layer; step S108, repeating the step S106 in preset times, makeing the base station Mac-hs layer be self-adapting the actual play speed of media; step S110, making the second signed descending guarantee bit rate increase predetermined variable quantity every time, repeating the step S106 and the step S108. The invention solves the problem that a NodeBMAC-hs protocol layer is difficult to realize the guarantee bit speed,because the streaming media planar source play speed is too low.