Sounding reference signals with collisions in asymmetric carrier aggregation
摘要
說明書
In a first option, the UE may determine whether to interrupt the uplink transmission on CC1 or CC3 based on a carrier number, also referred to herein as a CC index. Lower carrier numbers may have a higher priority. Thus, the UE may determine to interrupt the carrier with the higher carrier number. If more than two CCs are involved in the determination, the UE may determine to interrupt the carrier with the highest carrier number. For example, if the UE is configured with carrier number “CC0” (Pcell) and “CC1” (Scell), and will be switching to a third carrier to transmit SRS, the UE may determine to interrupt CC1 in order to switch to the third carrier for transmission of the SRS, because the CC index 1 is higher than 0. The UE may also transmit this information, with or without UE capability, to the eNB. The UE may consider UE capability in making this determination, as well. For example, if the UE will transmit SRS on a downlink CC, and switching is possible from a subset of uplink CCs, the UE may select the CC from within the subset that has the lower CC index number.
