3 Definitions and abbreviations

24.2443GPPRelease 17Stage 3TSWireless LAN control plane protocol for trusted WLAN access to EPC

3.1 Definitions

For the purposes of the present document, the terms and definitions given in 3GPP TR 21.905 [1] and the following apply. A term defined in the present document takes precedence over the definition of the same term, if any, in 3GPP TR 21.905 [1].

PDN connection for emergency bearer services: A PDN connection which was activated with request type "emergency" or "handover of emergency bearer services".

Single point-to-point connectivity: The PDN connectivity service is provided by one point-to-point connectivity between the UE and the TWAG concatenated with S2a bearer(s) between the TWAG and the PDN GW.

Multiple bearer PDN connectivity: The PDN connectivity service is provided by the multiple WLCP bearers per PDN connection where a separate WLCP bearer is established for the default S2a bearer, and for each dedicated S2a bearer established on the S2a interface between the TWAG and the PDN GW.

WLCP bearer: A bearer between the UE and the TWAG which has one-to-one mapping with the S2a bearer.

3.2 Abbreviations

For the purposes of the present document, the abbreviations given in 3GPP TR 21.905 [1] and the following apply. An abbreviation defined in the present document takes precedence over the definition of the same abbreviation, if any, in 3GPP TR 21.905 [1].

APN Access Point Name

DTLS Datagram Transport Layer Security

EAP Extensible Authentication Protocol

EPC Evolved Packet Core Network

ID Identifier

IE Information Element

IEI Information Element Identifier

LSB Least Significant Bit

MAC Media Access Control

MSB Most Significant Bit

N3G Non-3GPP Access

NBIFOM Network-based IP flow mobility

PCO Protocol Configuration Options

PDN Packet Data Network

PDN GW Packet Data Network Gateway

PTI Procedure Transaction Identity

TWAG Trusted WLAN Access Gateway

UE User Equipment

WLAN Wireless Local Area Network

WLCP Wireless LAN control plane protocol