5.44.3.1 PDU Session Establishment for PIN

When a PDU Session associated with a PIN is established by PEGC, an SMF is selected according to clause 4.3.2.2.3 of TS 23.502 [3] based on (DNN, S-NSSAI) combination. The PEGC may use IP address allocation methods as specified in clause 5.8.2 (e.g. IPv6 Prefix Delegation feature).

One PEGC may serve more than one PIN. The PEGC may use a single or multiple PDU sessions to serve multiple PINs. One PDU Session may be shared by more than one PIN served by the PEGC, if differentiation or isolation for the traffics to/from different PINs via the PEGC is not required in 5GS. Otherwise, different (DNN, S-NSSAI) combinations shall be applied to distinguish the PINs by different PDU sessions of the PEGC.

One PIN can be served by only one PDU session in the PEGC. If there are multiple PDU sessions for a PIN from different PEGCs connecting to the same UPF, the same mechanism for local switching in the UPF as defined for 5G VN group communication, as described in clause 5.8.2.13, may be applied.