System Architecture

cnSGW-C and SMF/IWF uses the same UPF instance, so that UPF can use those sessions to the collapsed data path.

Control plane (cnSGW-C and SMF) selects the same User-plane in various scenarios (initial attach, handover, and so on).

Following actions takes place during Initial Attach:

  • cnSGW-C passes the SGW-U FQDN information of selected UPF instance to SMF in Initial attach.

  • SMF selects the UPF instance as per the received SGW-U FQDN.

  • Same UPF FQDN is configured at cnSGW-C and at SMF to create a correlation as part of the network element profile.