A UE in one of an RRC idle mode or an RRC inactive mode may transmit a plurality of UL reference signals to the base station, receive a first L1 ACK message based on the transmission of the plurality of UL signals from the base station, and transmit UL data via at least one PUR based on the received first L1 ACK message. The plurality of UL signals may include SRS. The UE may receive a PUR configuration from the base station. The UE may determine to drop the transmission of one or more first UL signals, or the base station may determine to omit the transmission of the first L1 ACK message in response to one or more first UL signals, based on L1 ACK density or L1 ACK message in the L1 ACK monitoring window.