WIRELESS COMMUNICATIONS SYSTEM, WIRELESS BASE STATION DEVICE, USER TERMINAL, AND WIRELESS RESOURCE ALLOCATION METHOD

摘要

The present invention is designed to provide a radio communication system, a radio base station apparatus, a user terminal and a radio resource allocation method that cope with the increase of the number of users. A radio base station apparatus is provided with a scheduling section (310) that selects a radio resource for a PUCCH corresponding to a PDCCH that is multiplexed over a control region in a subframe and an enhanced PDCCH that is frequency-division-multiplexed with a downlink data signal over a data region in the subframe, and a transmission section that transmits a PDCCH signal and an enhanced PDCCH signal to a user terminal with information that can identify the radio resource for the PUCCH selected in this scheduling section (310). The scheduling section (310) selects a radio resource that does not overlap with the radio resource for the PUCCH corresponding to the PDCCH signal, as the radio resource for the PUCCH corresponding to the enhanced PDCCH signal.