IMPROVED CHANNEL STATE INFORMATION REPORTING ON LICENSED AND UNLICENSED CARRIERS

摘要

The invention relates to methods for for reporting channel state information.;For this purpose, the mobile station receives a trigger message (S01) that triggers the reporting of channel state information CSI for at least one of the plurality of downlink component carriers, the trigger message being received in a subframe n_Trigger, determines the CSI (S02) for at least one of the plurality of downlink component carriers based on reference signals present on the at least one of the plurality of downlink component carriers, and reports the triggered CSI (S03) in a subframe n_Report later than n_Trigger.;Higher layer signalling indicates that the reference signals are present in a subframe n_RS on the at least one of the plurality of downlink component carriers, where n_Trigger ≤ n_RS n_Report.