A resource management apparatus for a cellular communication system is provided wherein the available radio resource is divided into separate partitions, each of which is allocated to a different operator, such as a Mobile Virtual Network Operator. Radio Network Controllers of the cellular communication system comprise independent resource controllers for each operator. The resource controllers allocate radio resource to a subscriber unit in response to an operator identity associated with a service of the subscriber unit, such that different quality of service is achieved for different operators. The resource is allocated from the resource partition of the operator identified. The resource controllers independently control one or more quality of service parameters of the radio access network, Hence, each operator may independently control and manage quality of service and is thereby enabled to differentiate from other operators.