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