METHOD AND SYSTEM FOR DYNAMICALLY FEEDING BACK LONG TERM CHANNEL STATE INFORMATION

摘要

The present invention discloses a method for dynamically feeding back long term Channel State Information (CSI). The method comprises: the User Equipment (UE) determines whether the long term CSI needs to be fed back to the network side, and notifies the network side of the determination result. The present invention simultaneously discloses a system for dynamically feeding back long term CSI. The system comprises a determining unit and a notifying unit; the determining unit and the notifying unit are placed in the UE, wherein the determining unit is used to determine whether the long term CSI needs to be fed back to the network side, and the notifying unit is used to notify the network side of the determination result of the determining unit. In the present invention, by comparing the current long time CSI and the former long time CSI in use, the long time CSI is fed back to the network side when the difference exceeds a preset threshold; and determining to feed back long term CSI to the network side enables flexible feedback, thus economizing feedback overhead.