aster eNB, it sends the S1 initial UE message to the Mobility Management Entity (MME), which contains the Attach Request and PDN Connectivity Request with the DCNR bit on. After a successful authentication procedure, a Diameter Update Location Answer message is sent to the Home Subscriber Server (HSS) by the MME. This message contains the NR as Secondary RAT field, which indicates the intention of the UE to leverage the 5G NR. 5G Non-Standalone Networks The HSS responds positively as the UE has the plan for 5G use and also sends the bitrates. Note that for 5G use, additional fields called the extended max bit rate have been included, which support Gbps bitrates. The GTPv2 Create Session Request is sent from the MME to the SAEGW-C (a combination of SGW and PGW control plane nodes). This request also includes the DCNR field. The SAEGW-C then sends the Diameter Credit Control Request-Initial (CCR-I) message to the Policy and Charging Resource Function (PCRF). This message contains the request for Extended APN-AMBR values needed to support higher 5G speeds. The PCRF responds with a Diameter Credit Control Answer-Initial (CCA-I) message with the necessary policies in addition to the 5G AMBR values. In this step, the SAEGW-C sends a PFCP Session Establishment Request to the SAEGW-U. This message is relevant here as it depicts a CUPs-based architecture with control and user plane functions separated in the SGW and PGW. The PFCP Session Establishment Request message is used to inform the user plane about the parameters and packet handling rules of this particular session for this UE SO that the user plane is able to handle the packets accordingly. The user plane function responds with a PFCP session establishment response; this message contains a success code or an error code in case any of the rules have failed to apply. The PFCP Session Modification Procedure is then carried out and the SAEGW-C sends a PFCP: Session Modification Request with the SAEGW-U. Any earlier rule can be updated or removed during this procedure.