BASE STATION DEVICE, MOBILE TERMINAL DEVICE, COMMUNICATION SYSTEM, AND COMMUNICATION METHOD.

摘要

Provided are a base station device, mobile terminal device, communication system, and communication method which can accommodate for insufficient downlink control channel capacity .　The base station device is configured such that at a mobile terminal device that receives a downlink signal using a resource area for a downlink control signal and a resource area for a downlink data signal, multiple virtual resources for a downlink control signal are set in multiple physical resources that are arranged in the frequency direction in the resource area for the downlink data signal, and the downlink control signal is allocated in a distributed manner between the virtual resources on the relatively lower frequency band side and the virtual resources on the relatively higher frequency band side among the multiple virtual resources.