A computer-readable storage medium stores instructions for execution by one or more processors of a base station. The instructions configure the base station for 5G-NR QoS monitoring and reporting and cause the base station to encode a Downlink User Data frame for transmission from a CU-UP to a DU of the base station. The Downlink User Data frame includes an indicator requesting a delivery status for a downlink data transmission. A Downlink Data Delivery Status frame is encoded for transmission from the DU to the CU-UP using an F1-U interface. The Downlink Data Delivery Status frame includes a feedback delay measured at the DU based on the indicator. The feedback delay indicates a time between reception of the Downlink User Data frame and transmission of the Downlink Data Delivery Status frame. A downlink or uplink delay associated with the F1-U interface is determined based on the feedback delay.