29.1613GPPInterworking between the Public Land Mobile Network (PLMN) supporting packet based services with Wireless Local Area Network (WLAN) access and Packet data Networks (PDN)TS
The present document defines the requirements for Packet Domain interworking between a:
a) PLMN with WLAN access and PDN;
b) PLMN with WLAN access and PLMN.
The present document also defines, in clause 12, the usage of Radius at the Pp Reference Point between the Packet Data Gateway and the Presence Network Agent, see 3GPP TS 23.141 .