B.1 Scope

29.5123GPP5G SystemRelease 18Session Management Policy Control ServiceStage 3TS

This annex defines procedures for 5GC and EPC interworking, which contains the following scenarios:

– EPS and 5GS interworking (i.e. 3GPP access connected to EPC and 3GPP access connected to 5GC).

– EPC/ePDG and 5GS interworking (i.e. ePDG connected to EPC and 3GPP access connected to 5GC).

– EPS and 5GC/N3IWF interworking (i.e. 3GPP access connected to EPC and N3IWF connected to 5GC).

– EPS and 5GC/TNAN/TWAN interworking (i.e. 3GPP access connected to EPC and TNAN/TWAN connected to 5GC).

NOTE: In this Release 5GC and EPC interworking is not supported for SNPN.