Apparatuses, methods, and systems are disclosed for monitoring a QoS parameter. One apparatus includes a processor and a transceiver that receives a request to monitor a QoS parameter for a data connection of a remote unit. The processor modifies a downlink packet to include an indication for a QoS monitoring report. The transceiver receives a QoS monitoring result from an access network node in response to delivery of the modified downlink packet and the processor determines a value of the QoS parameter based on delivery information of the downlink packet.