vel. The preemption capability information defines if an SDF may use the resources that were already assigned to another SDF with a lower priority level. The preemption susceptibility information defines whether an SDF may lose the resources assigned to it in order to admit an SDF with higher priority level. The RQA is an optional parameter, which indicates that certain traffic carried in this QoS flow is subject to reflective QoS. The access network enables the transfer of the RQI for AN resource corresponding to this QoS flow when RQA is signaled. The RQA may be signaled to the NG-RAN via N2 reference point upon UE context establishment in NG-RAN and upon QoS flow establishment or modification. The notification control indicates whether notifications are requested from the RAN when the GFBR requirement can no longer be satisfied for a QoS flow during its life- time. If the notification control is enabled for a given GBR QoS flow and the NG-RAN determines that the GFBR cannot be satisfied, the AN sends a notification to the SMF, where 5GC upon receiving the notification may initiate an N2 signaling to modify or remove the QoS flow. Each PDU session of a UE is associated with a session aggregate maximum bit rate (session-AMBR). The subscribed session-AMBR is a subscription parameter which is retrieved by the SMF from UDM. The SMF may use the subscribed session-AMBR or modify it based on local policy or use the authorized session-AMBR received from PCF. The session-AMBR limits the aggregate bit rate that can be expected across all non-GBR QoS flows for a specific PDU session. For GBR QoS flows, the 5G QoS profile includes DL/UL GFBR and DL/UL MFBR. The GFBR denotes the bit rate that may be expected to be provided by a GBR QoS flow. The MFBR limits the bit rate that may be expected to be provided by a GBR QoS flow, which means that the excess traffic may be discarded by a rate shaping function. The GFBR and MFBR parameters are signaled to the AN in the QoS profile and sig- naled to the UE as QoS flow level for each