 flag is unique within a PDU session. The flag is either configured during the PDU session establishment procedure or during the PDU session modification procedure. The value of a QFI is configured by the AMF during the procedure of session establishment; the AMF querying the unified UDR database to know the user's authorized QoS. For the establishment of dedicated services, the SMF chooses the QoS characteristics (5QI/ARP) according to the values stored at the SMF or by querying the PCF entity. The 5QI/ARP combination defined by the PCF link in a PDU session is a QoS flow binding. The 5QI indicator is a parameter standardized by the 3GPP standard, allowing us to define: - the type of resource (Guaranteed Bit Rate or not): GBR or non-GBR; - priority; - the maximum transmission delay within the 5GS mobile network; - the residual error rate. The standardization of the 5QI value makes it possible to indicate how the flow is processed on each element of the user's plan, in order that processing is consistent between the entities of the 5G core network and of the NG-RAN access. The 5QI indicator is identical to the QCI (QoS Class Identifier) indicator for the 4G network for non-critical services (indicator from 1 to 80). New QCI values (81-85) have been defined in the case of URLLC services to guarantee speed and critical delay (delay critical GBR). NG-RAN and 5G-NR Packet Priority Delay Services Budget 100 ms Conversational Voice 150 ms Conversational Video (Live Streaming) 50 ms Real Time Gaming, V2X messages 300 ms Non-Conversational Video (Buffered Streaming) 75 ms Mission Critical user plane Push To Talk voice (e.g. MC-PTT) 100 ms Non-Mission-Critical user plane Push To Talk voice 50 ms V2X messages 100 ms IMS Signaling 300 ms Video (Buffered Streaming) TCP-Based (e.g. WWW, email, chat, ftp, p2p, etc.) 100 ms Voice, Video (Live Streaming), Interactive Gaming 300 ms Video (Buffered Streaming) TCP-Based (e.g. www, email, chat, ftp, p2p, etc.) 300 ms Video (Buffered Streaming) TCP-Based (e.g. www, email, chat, ftp, 