A communication controller and a communication controlling method are provided, even when functionalities of the communication controller included in a communication system such as UTRAN or the like, so that the services of the functionalities are available broadly in the whole system. An RNC 102 for controlling a movable communication terminal device, in cooperation with the communication controller, receives a request for provision of a service. The RNC 102 includes: a signal transmitter/receiver 201 for discriminating the type of the requested service; an HSUPA communication request discriminating section 203; a call controller 202; a transfer destination search table 205 for storing information that associates a service that can be requested by the service request receiving means and another RNC that can provide the service; and a transfer destination searching section 204 for identifying another RNC that can provide the service, based upon the information stored in the transfer destination search table 205, if there is a request for HSUPA communication that cannot be provided by the RNC 102. The RNC 102 transfers the request for the provision of the service to another RNC identified by the transfer destination searching section 204.