29.2343GPP3GPP system to Wireless Local Area Network (WLAN) interworkingStage 3TS

3.1 Definitions

For the purposes of the present document, the following terms and definitions given in 3GPP TS 23.234 [4] apply.

3GPP – WLAN Interworking

External IP Network/External Packet Data Network

Home WLAN

Interworking WLAN

Offline charging

Online charging

PS based services

Service Authorization

Visited WLAN

WLAN-UE

In addition, for the purposes of the present document, the following terms and definitions given in 3GPP TS 23.141 [31] apply.

Presence Network Agent

3.2 Symbols

For the purposes of the present document, the following symbols apply:

Dw Reference point between the 3GPP AAA Server and an SLF

Wa Reference point between a WLAN Access Network and a 3GPP AAA Proxy in the roaming case and a 3GPP AAA Server in the Non-Roaming case (charging and control signalling)

Wd reference point between a 3GPP AAA Proxy and a 3GPP AAA Server (charging and control signalling)

Wg Reference point between a 3GPP AAA Server/Proxy and a 3GPP WAG

Wm Reference point between a Packet Data Gateway and a 3GPP AAA Server

Wn Reference point between a WLAN Access Network and a 3GPP WAG

Wx Reference point between an HSS and a 3GPP AAA Server

Pr Reference point between a 3GPP AAA Server and a PNA

3.3 Abbreviations

For the purposes of the present document, the following abbreviations apply:

AAA Authentication, Authorization and Accounting

AVP Attribute Value Pair

CCF Charging Collection Function

CG Charging Gateway

EAP Extensible Authentication Protocol

HSS Home Subscriber Server

IMS IP Multimedia Subsystem

OCS On-line Charging System

PDG Packet Data Gateway

PNA Presence Network Agent

RADIUS Remote Authentication Dial‑In User Service

WAG WLAN Access Gateway

WLAN AN WLAN Access Network

WLAN Wireless Local Area Network

WLAN-UE WLAN User Equipment