| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a communication system, a mobile station device, a radio transmission control method, and an integrated circuit which are capable of efficiently managing/controlling a radio link state of a cell if a mobile station device detects a radio link failure in a part of aggregated cells. <P>SOLUTION: The physical layer of a mobile station device detects a downlink out-of-sync and a downlink in-sync, and notifies an RRC of the subject station of the detection. Based on the notified downlink out-of-sync and in-sync, the RRC determines, for each cell, whether a radio link failure has occurred, notifies a MAC of the subject station of occurrence of a radio link failure for each of the cells. Based on the notification, the MAC sets so as to stop radio transmission on an uplink which uses, as reference of transmission power adjustment, the downlink of the cell where a radio link failure has occurred. <P>COPYRIGHT: (C)2012,JPO&INPIT |
