3GPP STa/SWa  Application ( 16777250 )

The STa/SWa reference point is between the Trusted non-3GPP IP Access (AGW) and the 3GPP AAA Server/Proxy. The STa interface transports access authentication, authorization, mobility parameters and charging-related information in a secure manner. The STa/SWa interface provides authentication based on reuse of the DER/DEA command set defined in Diameter Extensible Authentication Protocol (EAP).

Reference:  3GPP TS29.273   View