Feature Description
Multi DNN support enables the SMF to have multiple PDN connections for end users to provide different services including Internet and VONR services.
The SMF fetches locally configured DNN profile-based DNN in PDU Session Establishment Request from the AMF and maintains the PDN connections based on using SUPI and pdu-session-id. SMF includes the received DNN in all SBI interfaces to authorize the end user to fetch subscription information, policy and charging related information and provisions forward path information to the UPF. The SMF integrates Multi-DNN Support with IPAM (IP Address Management) Module to allocate address to end-user based on received DNN, which maps the DNN-Profile that is derived from subscriber policies. The SMF also fetches DNN and IPv4 and IPv6 path information based on IPAM pool configuration and updates the UPF as a part of node association interactions.
Note | Multiple DNN is supported only for 5GS procedures and is not qualified for EPS Session using SBI interfaces. |
The SMF supports Virtual DNN mapping based on a subscriber profile. It supports mapping of a UE requested DNN to a configured DNN and sends the selected DNN profile towards the configured network interfaces.