3GPP 23.501 v20.2.0 — the document's own text
5.4.4b UE 5GSM Core Network Capability handling
Taught in 9. Registration, reachability and paging (The 5G system architecture, in depth), 10. Radio, Wi-Fi, cable — every way in (The 5G system architecture, in depth).
The UE 5GSM Core Network Capability is included in PDU Session Establishment/Modification Request.
The UE shall indicate in the UE 5GSM Core Network Capability whether the UE supports:
- "Ethernet" PDU Session Type supported in EPC as PDN Type "Ethernet";
- Reflective QoS;
- Multi-homed IPv6 PDU Session (only if the Requested PDU Type was set to "IPv6" or "IPv4v6");
- ATSSS capability (as referred to clause 5.32.2);
- Transfer of Port Management Information containers;
- Support for secondary DN authentication and authorization over EPC (as referred to clause 5.17.2.5);
- (S)RTP Multiplexed Media Identification Information in IP Packet Filters.
The 5GSM Core Network Capability is transferred, if needed, from V-SMF to H-SMF during PDU Session Establishment/Modification procedure.
After the first inter-system change from EPS to 5GS for a PDU session established in EPS, the 5GSM Core Network Capability is also included in the PDU Session Modification if the Reflective QoS and/or Multi-homed IPv6 PDU Session is present.