Patent ID: 8885582

Claim:
A mobile communication system in which a mobile station apparatus searches for a physical downlink control channel (PDCCH) transmitted by a base station apparatus in a search space, the search space comprising a plurality of resource elements, the search space corresponding to a cell-radio network temporary identity (C-RNTI) for dynamic scheduling, the mobile communication system comprising: the base station apparatus configured to transmit, to the mobile station apparatus, the PDCCH in the search space, the PDCCH including both a C-RNTI for persistent scheduling and resource allocation information set to a predetermined value; and the mobile station apparatus configured: to search for the PDCCH in the search space, the search space being located by the mobile station apparatus according to the C-RNTI for dynamic scheduling; and to decode the PDCCH according to the C-RNTI for persistent scheduling, when the mobile station apparatus has both the C-RNTI for dynamic scheduling and the C-RNTI for persistent scheduling; wherein the mobile station apparatus is further configured to halt data transmission on persistently-allocated resources when the PDCCH includes the C-RNTI for persistent scheduling and the resource allocation information has been set to the predetermined value.