/ CSI FEEDBACK IN LTE/LTE-ADVANCED SYSTEMS WITH UNLICENSED SPECTRUM

摘要

Long Term Evolution (LTE) and LTE-Advanced (LTE-A) networks including contention-based shared unlicensed spectrum, in which a user equipment (UE) identifies at least one carrier using contention-based radio frequency spectrum Channel state information (CSI) feedback in is disclosed. The UE detects a transmission signal indicating clear channel assessment (CCA) result information for the carrier, and based on the detected transmission signal, determines whether a reference signal for channel state information measurement exists in the subframe. The UE will transmit a measurement report based on this determination of the presence of the reference signal.