MOBILE STATION DEVICE, MOBILE COMMUNICATION SYSTEM, AND COMMUNICATION METHOD

摘要

Provided is a mobile communication system which decides a region of a physical downlink control channel to be searched by a mobile station device according to a mobile station identifier set by a base station device. When a plurality of mobile station identifiers are set for the mobile station device, the base station device arranges a physical downlink control channel containing a first mobile station identifier or a physical downlink control channel containing a second mobile station identifier in a search region of the physical downlink control channel in accordance with the first mobile station identifier. When a plurality of mobile station identifiers are set from the base station device, the mobile station device decodes the physical downlink control channel containing the first mobile station identifier and the physical downlink control channel containing the second mobile station identifier in the search region of the physical downlink control channel in accordance with the first mobile station identifier.