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TECHNICAL SPECIFICATION
Universal Mobile Telecommunications System (UMTS);
LTE;
Wireless LAN control plane protocol
for trusted WLAN access to EPC;
Stage 3
(3GPP TS 24.244 version 15.2.0 Release 15)
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3GPP TS 24.244 version 15.2.0 Release 15 1 ETSI TS 124 244 V15.2.0 (2018-07)
Reference
RTS/TSGC-0124244vf20
Keywords
LTE,UMTS
ETSI
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ETSI
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3GPP TS 24.244 version 15.2.0 Release 15 2 ETSI TS 124 244 V15.2.0 (2018-07)
Intellectual Property Rights
Essential patents
IPRs essential or potentially essential to normative deliverables may have been declared to ETSI. The information
pertaining to these essential IPRs, if any, is publicly available for ETSI members and non-members, and can be found
in ETSI SR 000 314: "Intellectual Property Rights (IPRs); Essential, or potentially Essential, IPRs notified to ETSI in
respect of ETSI standards", which is available from the ETSI Secretariat. Latest updates are available on the ETSI Web
server (https://ipr.etsi.org/).
Pursuant to the ETSI IPR Policy, no investigation, including IPR searches, has been carried out by ETSI. No guarantee
can be given as to the existence of other IPRs not referenced in ETSI SR 000 314 (or the updates on the ETSI Web
server) which are, or may be, or may become, essential to the present document.
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Foreword
This Technical Specification (TS) has been produced by ETSI 3rd Generation Partnership Project (3GPP).
The present document may refer to technical specifications or reports using their 3GPP identities, UMTS identities or
GSM identities. These should be interpreted as being references to the corresponding ETSI deliverables.
The cross reference between GSM, UMTS, 3GPP and ETSI identities can be found under
.
Modal verbs terminology
In the present document "shall", "shall not", "should", "should not", "may", "need not", "will", "will not", "can" and
"cannot" are to be interpreted as described in clause 3.2 of the ETSI Drafting Rules (Verbal forms for the expression of
provisions).
"must" and "must not" are NOT allowed in ETSI deliverables except when used in direct citation.
ETSI
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3GPP TS 24.244 version 15.2.0 Release 15 3 ETSI TS 124 244 V15.2.0 (2018-07)
Contents
Intellectual Property Rights . 2
Foreword . 2
Modal verbs terminology . 2
Foreword . 8
1 Scope . 8
2 References . 8
3 Definitions and abbreviations . 9
3.1 Definitions . 9
3.2 Abbreviations . 9
4 General . 10
4.1 Overview . 10
4.2 Protocol stack . 10
4.2.1 General . 10
4.2.2 UDP port numbers for WLCP. 10
4.2.2.1 General . 10
4.2.2.2 UE procedure . 11
4.2.2.3 TWAG procedure . 11
4.2.3 IP addresses of WLCP message . 11
4.2.3.1 General . 11
4.2.3.2 UE procedure . 11
4.2.3.3 TWAG procedure . 11
4.2.4 DTLS usage . 12
4.3 WLCP layer states when single point-to-point connectivity is used . 12
4.3.1 General . 12
4.3.2 WLCP layer states in the UE . 12
4.3.2.1 PDN CONNECTIVITY NOT ESTABLISHED . 12
4.3.2.2 PDN CONNECTIVITY ESTABLISHED . 12
4.3.2.3 PROCEDURE TRANSACTION INACTIVE . 12
4.3.2.4 PROCEDURE TRANSACTION PENDING . 12
4.3.3 WLCP layer states in the TWAG . 13
4.3.3.1 PDN CONNECTIVITY NOT ESTABLISHED . 13
4.3.3.2 PDN CONNECTIVITY PENDING . 13
4.3.3.3 PDN CONNECTIVITY ESTABLISHED . 13
4.3.3.4 PDN DISCONNECT PENDING . 13
4.3.3.5 PROCEDURE TRANSACTION INACTIVE . 13
4.3.3.6 PROCEDURE TRANSACTION PENDING . 13
4.3A WLCP layer states when multiple bearer PDN connectivity is used . 14
4.3A.1 General . 14
4.3A.2 PDN connectivity and default WLCP bearer contextstates in the UE . 14
4.3A.2.1 PDN CONNECTIVITY NOT ESTABLISHED . 14
4.3A.2.1A WLCP BEARER CONTEXT INACTIVE . 14
4.3A.2.2 PDN CONNECTIVITY ESTABLISHED . 14
4.3A.2.2A WLCP BEARER CONTEXT ACTIVE . 14
4.3A.2.3 PROCEDURE TRANSACTION INACTIVE . 14
4.3A.2.4 PROCEDURE TRANSACTION PENDING . 15
4.3A.2A Dedicated WLCP bearer context states in the UE . 15
4.3A.2A.1 Substate WLCP BEARER CONTEXT INACTIVE . 15
4.3A.2A.2 Substate WLCP BEARER CONTEXT ACTIVE . 15
4.3A.3 WLCP layer PDN connectivity and default WLCP bearer context states in the TWAG . 15
4.3A.3.1 PDN CONNECTIVITY NOT ESTABLISHED . 15
4.3A.3.1A WLCP BEARER CONTEXT INACTIVE . 15
4.3A.3.2 PDN CONNECTIVITY PENDING . 15
4.3A.3.2A WLCP BEARER CONTEXT ACTIVE PENDING . 16
4.3A.3.3 PDN CONNECTIVITY ESTABLISHED . 16
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3GPP TS 24.244 version 15.2.0 Release 15 4 ETSI TS 124 244 V15.2.0 (2018-07)
4.3A.3.3A WLCP BEARER CONTEXT ACTIVE . 16
4.3A.3.4 PDN DISCONNECT PENDING . 16
4.3A.3.4A WLCP BEARER CONTEXT INACTIVE PENDING . 16
4.3A.3.5 WLCP BEARER MODIFY PENDING . 16
4.3A.3A WLCP layer dedicated bearer context states in the TWAG . 17
4.3A.3A.1 WLCP BEARER CONTEXT INACTIVE . 17
4.3A.3A.2 WLCP BEARER CONTEXT ACTIVE PENDING . 17
4.3A.3A.3 WLCP BEARER CONTEXT ACTIVE . 17
4.3A.3A.4 WLCP BEARER CONTEXT INACTIVE PENDING . 17
4.3A.3A.5 WLCP BEARER CONTEXT MODIFY PENDING . 17
4.4 IP address allocation . 18
5 Wireless LAN control plane protocol Procedures . 18
5.1 General . 18
5.1.1 Overview . 18
5.1.2 Services provided by lower layers . 18
5.1.3 Principles of address handling for WLCP procedures . 18
5.1.4 Abnormal cases in the UE . 19
5.1.5 Abnormal cases in the TWAG . 19
5.1.6 Handling of APN based congestion control . 19
5.2 PDN connectivity establishment procedure . 19
5.2.1 General . 19
5.2.2 PDN connectivity establishment procedure initiatio n . 20
5.2.3 PDN connectivity establishment procedure accepted by the TWAG . 21
5.2.3.1 PDN connectivity establishment accepted by the UE . 22
5.2.3.2 PDN connectivity establishment not accepted by the UE . 22
5.2.4 PDN connectivity procedure not accepted by the TWAG . 22
5.2.5 Abnormal cases in the UE . 24
5.2.6 Abnormal cases on the network side . 24
5.3 TWAG initiated PDN disconnection procedure . 25
5.3.1 General . 25
5.3.2 Procedure description . 25
5.3.3 Abnormal cases in the UE . 26
5.3.4 Abnormal cases in the TWAG . 26
5.4 UE requested PDN disconnection procedure . 26
5.4.1 General . 26
5.4.2 Procedure description . 26
5.4.3 Abnormal cases in the UE . 27
5.4.4 Abnormal cases in the TWAG . 27
5.5 STATUS message . 27
5.6 TWAG initiated PDN connectivity modification procedure . 28
5.6.1 General . 28
5.6.2 Procedure description . 28
5.6.3 PDN connectivity modification procedure accepted by the UE . 29
5.6.4 PDN connectivity modification procedure not accepted by the UE . 29
5.6.5 Abnormal cases in the UE . 29
5.6.6 Abnormal cases in the TWAG . 29
5.7 UE requested PDN connectivity modification procedure. 29
5.7.1 General . 29
5.7.2 Procedure description . 29
5.7.3 PDN connectivity modification procedure accepted by the network . 30
5.7.4 PDN connectivity modification procedure not accepted by the network . 30
5.7.5 Abnormal cases in the UE . 30
5.7.6 Abnormal cases in the TWAG . 31
5.8 PGW initiated local PDN disconnection in the TWAG . 31
5.8.1 General . 31
5.8.2 Procedure description . 31
5.9 Local PDN disconnection in the UE initiated from 3GPP access . 31
5.9.1 General . 31
5.9.2 Procedure description . 31
5.10 WLCP bearer setup procedure . 31
5.10.1 General . 31
ETSI
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3GPP TS 24.244 version 15.2.0 Release 15 5 ETSI TS 124 244 V15.2.0 (2018-07)
5.10.2 Procedure description . 32
5.10.2.1 WLCP bearer setup procedure initiated by the TWAG . 32
5.10.2.2 WLCP bearer setup procedure accepted by the UE . 32
5.10.2.3 WLCP bearer setup procedure not accepted by the UE . 32
5.10.3 Abnormal cases in the UE . 33
5.10.4 Abnormal cases in the TWAG . 34
5.11 WLCP bearer modify procedure . 34
5.11.1 General . 34
5.11.2 Procedure description . 34
5.11.2.1 WLCP bearer modify procedure initiated by the TWAG . 34
5.11.2.2 WLCP bearer modify procedure accepted by the UE . 35
5.11.2.3 WLCP bearer modify procedure not accepted by the UE . 35
5.11.3 Abnormal cases in the UE . 37
5.11.4 Abnormal cases in the TWAG . 37
5.12 WLCP bearer release procedure . 37
5.12.1 General . 37
5.12.2 Procedure description . 38
5.12.2.1 WLCP bearer release procedure initiated by the TWAG . 38
5.12.2.2 WLCP bearer release procedure accepted by the UE . 38
5.12.2.3 WLCP bearer release procedure not accepted by the UE . 38
5.12.3 Abnormal cases in the UE . 39
5.12.4 Abnormal cases in the TWAG . 39
6 Handling of unknown, unforeseen, and erroneous protocol data . 39
6.1 General . 39
6.2 Message too short . 40
6.3 Unknown or unforeseen procedure transaction identity or PDN connection ID . 40
6.3.1 Procedure transaction identity. 40
6.3.2 PDN connection ID . 40
6.4 Unknown or unforeseen message type . 41
6.5 Non-semantical mandatory information element errors . 41
6.5.1 Common procedures . 41
6.5.2 PDN connection management. 41
6.6 Unknown and unforeseen IEs in the non-imperative message part . 42
6.6.1 IEIs unknown in the message . 42
6.6.2 Out of sequence IEs . 42
6.6.3 Repeated IEs . 42
6.7 Non-imperative message part errors . 42
6.7.1 General . 42
6.7.2 Syntactically incorrect optional IEs . 42
6.7.3 Conditional IE errors . 42
6.8 Messages with semantically incorrect contents . 43
7 Message functional definitions and contents . 43
7.1 PDN connectivity request . 43
7.1.1 Message definition . 43
7.1.2 Access point name . 43
7.1.3 Protocol configuration options . 43
7.1.4 NBIFOM container . 43
7.1.5 UE N3G capability. 43
7.2 PDN connectivity accept .
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