Radio resource management with adaptive congestion control

A Radio Bearer Control unit for controlling at least one radio bearer parameter, said unit comprising:

• a Parameter Retrieval unit configured to communicate with an external admission control unit for ascertaining a current first target or limit value of at least one radio access bearer parameter;
• a Performance Data Retrieval unit adapted to communicate with an external radio network monitoring statistics unit for receiving at least one current measured value of at least one air interface load parameter;
• and
• a Radio Bearer Parameter Control unit communicating with said parameter retrieval unit and said performance data retrieval unit, and configured to select a second target or limit value of a radio bearer parameter based upon the first target or limit value and said current value of said at lest one air interface load parameter.

A system for controlling at least one radio bearer parameter of a first radio bearer to be established or maintained between a mobile terminal and a first access-network node in a first cell of a cellular radio access network, said system comprising:

• first determining means for determining a current value of at least one load parameter indicative of an air interface load of a first cell;
• second determining means for determining a current first target or limit value of at least one radio access bearer parameter of a radio access bearer;
• and
• selecting means for selecting a second target value or limit value of the radio bearer parameter based upon the first target or limit value and the current value of the load parameter,
• wherein the first access-network node communicates with a core-network node in a core network to establish or maintain the at least one radio access bearer between the mobile terminal and the core-network node.

A radio bearer control unit for controlling at least one radio bearer parameter, said radio bearer control unit comprising:

• parameter retrieval means for communicating with an external admission control unit for ascertaining a current first target or limit value of at least one radio access bearer parameter;
• performance data retrieval means for communicating with an external radio network monitoring statistics unit for receiving at least one current measured value of at least one air interface load parameter;
• and
• radio bearer parameter control means communicating with said parameter retrieval means and said performance data retrieval means, for selecting a second target or limit value of a radio bearer parameter based upon the first target or limit value and the current value of the at least one air interface load parameter.