MOBILE STATION DEVICE, BASE STATION DEVICE, AND RADIO COMMUNICATION SYSTEM

摘要

PROBLEM TO BE SOLVED: To provide a mobile station device, a base station device, and a radio communication system, allowing a mobile station device capable of machine type communication to perform communication efficiently.SOLUTION: A mobile station device communicates with a base station device and is capable of machine type communication. The mobile station device monitors a physical downlink control channel in a common search region disposed at center of a downlink band in the base station device. The common search region is disposed within a resource block, the number of which is predefined on the basis of a downlink bandwidth supported by the mobile station device.