Patent ID: 8488464

Claim:
A radio base station, comprising: a flow control mechanism that receives a high-speed downlink shared channel (HS-DSCH) data frame and then inspects a frame sequence number located within the received HS-DSCH data frame to determine if one or more HS-DSCH data frames that were previously transmitted have been lost, wherein said flow control mechanism is adapted to decrease a bit rate of a priority queue flow associated with the HS-DSCH data frame and the one or more lost HS-DSCH data frames by transmitting a message to the radio network controller after a predetermined number of lost HS-DSCH data frames have been detected, said flow control mechanism determines one or more HS-DSCH data frames that were previously transmitted have been lost by determining if the frame sequence numbers in consecutively received HS-DSCH data frames are out of sequence, said flow control mechanism is adapted to detect at least ne damaged HS-DSCH frame, wherein a HS-DSCH frame is damaged when one or more asynchronous transfer mode (ATM) cell is lost out of the HS-DSCH frame, said flow control mechanism decreases a maximum bit rate for all HS traffic after a predetermined number of lost HS-DSCH data frames have been detected during a predetermined period of time, and said flow control mechanism decreases the maximum bit rate for all HS traffic after a predetermined number of damaged HS-DSCH data frames have been detected during the predetermined period of time.