1 Scope

29.2733GPP3GPP EPS AAA interfacesEvolved Packet System (EPS)Release 18TS

The present document defines the stage-3 protocol description for several reference points for the non-3GPP access in EPS:

– The SWa reference point between an un-trusted non-3GPP IP access and the 3GPP AAA Server/Proxy.

– The STa reference point between a trusted non-3GPP IP access and the 3GPP AAA Server/Proxy.

– The SWd reference point between the 3GPP AAA Proxy and 3GPP AAA Server.

– The SWx reference point between the 3GPP AAA Server and the HSS.

– The S6b reference point between the 3GPP AAA Server/Proxy and the PDN GW.

– The SWm reference point between the 3GPP AAA Server/Proxy and the ePDG.

– The reference point between the 3GPP AAA Server/Proxy and the EIR.

The present document also defines the stage 3 protocol description for the SWa reference point used between a non-3GPP WLAN access and the NSWO NF for Non-seamless WLAN offload in 5GS.