METHOD AND RADIO NODE FOR TRANSMITTING DOWNLINK SIGNALS

摘要

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

主权项

1. A method performed by a radio node of a cellular network, the radio node being operable for radio communication of data with a User Equipment (UE) 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 is configured to support both the first carrier type A and the second carrier type B, the method comprising:
applying the first carrier type A for downlink signals on a first frequency F1, switching between applying the second carrier type B and at least partly applying the first carrier type 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, and transmitting to the UE an indicator in a downlink assignment for data on a data channel, the indicator indicating to the UE whether Cell-specific Reference Signal, CRS, resource elements are used for transmitting the data to the UE, thereby enabling the UE to determine a mapping for the data channel depending on the indicator.