Patent ID: 8432858
Filing Date: 2013-04-30
Classification: H04W

Abstract:
1. A radio network controller for assigning, to each wireless terminal connected to a wireless network, one of an individual channel exclusively used by a wireless terminal and a common channel shared with at least one wireless terminal different from the wireless terminal as a communication channel, the radio network controller comprising: a securement unit configured to secure an individual channel resource for assigning the individual channel to the wireless terminal, to store a scramble code applied to the wireless terminal that uses the individual channel resources, before the wireless terminal is connected to the wireless network, even when there exists no wireless terminal to which the individual channel should be assigned, and to secure, when switching from an individual channel to a common channel has been carried out for a certain wireless terminal, an individual channel resource used by the certain wireless terminal without releasing the individual channel resource, a pre-storage unit configured to prestore identification information of the individual channel resource secured by the securement unit in an undetermined state before determining that the individual channel is to be assigned to the wireless terminal, a determination unit configured to determine that the individual channel is to be assigned to the wireless terminal; an assignment unit, when an assignment of the individual channel has been determined, configured to assign the individual channel of a secured individual channel resource before the determination by the determination unit to the wireless terminal, and a storage unit configured to store the certain wireless terminal and the individual channel resource used by the certain wireless terminal in association with each other, wherein, when the determination unit determines that a communication channel used by the certain wireless terminal is to be switched from a common channel to an individual channel again, the assignment unit refers to the storage unit and assigns the individual channel resource originally used by the certain wireless terminal.