Patent ID: 10627737

Abstract:
Systems and methods relating to accurate Channel State Information (CSI) measurements for a License Assisted Secondary Cell (LA SCell) are disclosed herein. A wireless device operates in a cellular communications network according to a carrier aggregation scheme using both a licensed frequency band and an unlicensed frequency band operates to determine whether a CSI Reference Symbol (CSI-RS) transmission from an LA SCell is present in a subframe, where the LA SCell is in an unlicensed frequency band. Upon determining that a CSI-RS transmission is present in the subframe, the wireless device performs a first type of interference measurement on configured CSI Interference Measurement (CSI-IM) resources in the subframe. Upon determining that a CSI-RS transmission is not present in the subframe, the wireless device performs a second type of interference measurement on the configured CSI-IM resources in the subframe. Related methods and storage media are also described.