Patent ID: 7489654

Claim:
A method for controlling the flow of data between a radio network controller (RNC) and a base station of a Universal Mobile Telecommunications Systems (UMTS) mobile communications system with High Speed Downlink Packet Access (HSDPA) capability via an Iub interface, where a High Speed Downlink Shared Channel(HS-DSCH) Frame Protocol mechanism is implemented in the Iub interface to provide control and data services for the communication of HSDPA user data between the RNC and the base station, the method comprising: sending an HS-DSCH Capacity Request control message from the RNC towards the base station indicating a total amount of user data waiting in the RNC, in order to request data transport capacity; sending an HS-DSCH Capacity Allocation control message from the base station towards the RNC granting the amount of data the RNC is allowed to send within a period of time; the RNC sending the granted amount of user data information to the base station by means of an HS-DSCH Data Frame message; and a capacity overload control entity monitoring information about actual total Iub interface data transport flow, and when a determined Iub interface transport capacity value is reached, reducing the data transport flow in the Iub interface, wherein the Iub interface is an interface between the RNC and the base station.