Method for controlling radio access resources in a communication network, which has a plurality of subnetworks (305, 305-1, 305-2), logically separate from one another, that each have an associated prescribed quality of service class according to at least one quality of service agreement for communication services, which has a central quality of service manager that manages the quality of service classes of the subnetworks and uses the radio access resources to provide the quality of service for communication connections from mobile terminals to the subnetworks, which further has a radio access network having a plurality of radio access entities for providing radio access for mobile terminals to the subnetworks, the method comprising the steps of: the central quality of service manager transmitting to a first radio access entity a request for radio access by a mobile terminal to a first subnetwork via the radio access network with an indication of the quality of service class of the first subnetwork; the first radio access entity transmitting a resource message to the central quality of service manager, wherein the resource message displays that the available radio access resources of the first radio access entity are not adequate for a communication connection between the mobile terminal and the first subnetwork with the quality of service class; the central quality of service manager transmitting to a second radio access entity the request for radio access by a mobile terminal to the first subnetwork via the radio access network with an indication of the quality of service class of the first subnetwork; the second radio access entity transmitting a resource message to the central quality of service manager, wherein the resource message displays that the available radio access resources of the second radio access entity are adequate for the communication connection between the mobile terminal and the first subnetwork with compliance with the quality of service class; and directing the communication connection of the first subnetwork via the second radio access entity. the central quality of service manager transmitting to a first radio access entity a request for radio access by a mobile terminal to a first subnetwork via the radio access network with an indication of the quality of service class of the first subnetwork; the first radio access entity transmitting a resource message to the central quality of service manager, wherein the resource message displays that the available radio access resources of the first radio access entity are not adequate for a communication connection between the mobile terminal and the first subnetwork with the quality of service class; the central quality of service manager transmitting to a second radio access entity the request for radio access by a mobile terminal to the first subnetwork via the radio access network with an indication of the quality of service class of the first subnetwork; the second radio access entity transmitting a resource message to the central quality of service manager, wherein the resource message displays that the available radio access resources of the second radio access entity are adequate for the communication connection between the mobile terminal and the first subnetwork with compliance with the quality of service class; and directing the communication connection of the first subnetwork via the second radio access entity.