Patent ID: 7564788

Claim:
A radio access network node which provides High Speed Downlink Packet Access (HSDPA) comprising: a priority queue for receiving and storing data which is to be sent on a High Speed Downlink Shared Channel (HS-DSCH) over an air interface to a mobile terminal, the priority queue receiving the data over an interface with a superior node in accordance with a capacity allocation; a flow controller configured to measuring actual utilization of the capacity allocation for the priority queue and to adjust the capacity allocation in dependence upon the actual utilization by performing the following acts: counting received bits for the priority queue during a current evaluation period; determining a capacity allocation utilization caUtil for the priority queue to be 1 last sent value of a variable CaCreditsBitrate is zero; determining the capacity allocation utilization caUtil for the priority queue in accordance with Expression 1 if the last sent value of a varible CaCreditsBitrate is non-zero, Expression 1 being as follows: caUtil=Received number of bits during the current evaluation period/(CaCreditsBitrate*0.1); calculating an average capacity allocation utilization avgCaUtil for the priority queue using Expression 2, Expression 2 being avgCaUtil=(1−deltaCaUtil)* caUtil+deltaCaUtil*previous avgCaUtil, wherein deltaCaUtil is an averaging time constant and wherein previous avgCaUtil is a previous value of the average capacity allocation utilization avgCaUtil for the priority queue.