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Content for  TS 24.244  Word version:  16.0.0

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1  ScopeWord‑p. 8
The present document specifies the procedures of the Wireless LAN control plane protocol (WLCP) for trusted WLAN access to EPC which is used between User Equipment (UE) and Trusted WLAN Access Gateway (TWAG) for multi-connection mode as specified in TS 23.402.
This document also defines the message format, information elements coding, error handling and system parameters applied by the WLCP protocol.

2  References

The following documents contain provisions which, through reference in this text, constitute provisions of the present document.
  • References are either specific (identified by date of publication, edition number, version number, etc.) or non specific.
  • For a specific reference, subsequent revisions do not apply.
  • For a non-specific reference, the latest version applies. In the case of a reference to a 3GPP document (including a GSM document), a non-specific reference implicitly refers to the latest version of that document in the same Release as the present document.
[1]
TR 21.905: "Vocabulary for 3GPP Specifications".
[2]
TS 23.402: "Architecture Enhancements for non-3GPP accesses".
[3]
TS 24.302: "Access to the 3GPP Evolved Packet Core (EPC) via non-3GPP access networks; Stage 3".
[4]
TS 24.008: "Mobile radio interface Layer 3 specification; Core network protocols; Stage 3".
[5]
TS 24.301: "Non-Access-Stratum (NAS) protocol for Evolved Packet System (EPS); Stage 3".
[6]
IEEE Std 802-2014: "IEEE Standard for Local and Metropolitan Area Networks: Overview and Architecture", 30th June 2014.
[7]
TS 24.007: "Mobile radio interface signalling layer 3; General aspects".
[8]
RFC 768:  "User Datagram Protocol"
[9]
TS 33.402: "3GPP System Architecture Evolution (SAE); Security aspects of non-3GPP accesses".
[10]
TS 24.161: "Network-Based IP Flow Mobility (NBIFOM); Stage 3".
[11]
TS 23.380: "IMS Restoration Procedures".
[12]
TS 29.274: "Tunnelling Protocol for Control plane (GTPv2-C); Stage 3".
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3  Definitions and abbreviationsWord‑p. 9

3.1  Definitions

For the purposes of the present document, the terms and definitions given in TR 21.905 and the following apply. A term defined in the present document takes precedence over the definition of the same term, if any, in TR 21.905.
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.
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3.2  Abbreviations

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