Study on enhancing topology of the Service Management Function (SMF) and the User Plane Function (UPF) in 5G networks
The objective of this Technical Report is to study enhancements of 5GS architecture that has been defined in Rel-15 about the topology of SMF and UPF, and:
1. investigate mechanisms to enable the 3GPP system to support deployments where a SMF is not able / allowed to control UPF(s) throughout the same PLMN.
2. Study whether it is needed to enhance the capability of 5GS architecture for a UPF to be controlled by multiple SMF's (and many UPF's to be controlled by many SMFs) and, if yes, define such enhancements.
For these objectives, use cases will be defined.