METHOD AND RADIO NODE FOR TRANSMITTING DOWNLINK SIGNALS

摘要

A method and radio node(600) for radio communication of data with a User Equipment, UE, (602) wherein a first carrier type A is applicable for serving both legacy UEs and new UEs and a second carrier type B is applicable only for serving new UEs, and wherein the UE (602) is configured to support both the first and second carrier types A,B. The radio node (600) applies the first carrier type A for downlink signals on a first frequency (F1), and switches between the second and first carrier types B,A for downlink signals on a second frequency (F2) in order to allow the legacy UEs to measure and/or be served on the second frequency (F2). The radio node (600) further transmits to the UE (602) an indicator (604) in a downlink assignment for data on a data channel,the indicator (604) indicating to the UE (602) whether Cell-specific Reference Signal,CRS, resource elements are used for transmitting the data to the UE. Thereby the UE (602) is enabled to determine a mapping for the data channel depending on the indicator (604).