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TECHNICAL SPECIFICATION
Digital cellular telecommunications system (Phase 2+) (GSM);
Universal Mobile Telecommunications System (UMTS);
LTE;
Interconnection Border Control Functions (IBCF)
- Transition Gateway (TrGW) interface, Ix interface;
Stage 3
(3GPP TS 29.238 version 15.0.0 Release 15)
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3GPP TS 29.238 version 15.0.0 Release 15 1 ETSI TS 129 238 V15.0.0 (2018-10)
Reference
RTS/TSGC-0429238vf00
Keywords
GSM,LTE,UMTS
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3GPP TS 29.238 version 15.0.0 Release 15 2 ETSI TS 129 238 V15.0.0 (2018-10)
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
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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 29.238 version 15.0.0 Release 15 3 ETSI TS 129 238 V15.0.0 (2018-10)
Contents
Intellectual Property Rights . 2
Foreword . 2
Modal verbs terminology . 2
Foreword . 6
1 Scope . 7
2 References . 8
3 Definitions, symbols and abbreviations . 10
3.1 Definitions . 10
3.2 Symbols . 11
3.3 Abbreviations . 11
4 Applicability . 12
4.1 Architecture . 12
5 Profile Description . 12
5.1 Profile Identification. 12
5.2 Summary . 12
5.3 Gateway Control Protocol Version . 13
5.4 Connection model. 13
5.5 Context attributes . 14
5.6 Terminations . 14
5.6.1 Termination names . 14
5.6.1.1 IP Termination . 14
5.6.1.1.1 ABNF Coding Overview and prose specification . 14
5.6.1.1.2 ASN.1 Coding Overview and prose specification . 15
5.6.2 Multiplexed terminations . 15
5.7 Descriptors . 16
5.7.1 TerminationState Descriptor . 16
5.7.2 Stream Descriptor . 16
5.7.2.0 General . 16
5.7.2.1 LocalControl Descriptor . 16
5.7.3 Events descriptor . 18
5.7.4 EventBuffer descriptor . 19
5.7.5 Signals descriptor . 19
5.7.6 DigitMap descriptor . 20
5.7.7 Statistics descriptor . 20
5.7.8 ObservedEvents descriptor . 20
5.7.9 Topology descriptor . 21
5.7.10 Error descriptor . 21
5.8 Command API . 24
5.8.1 Add . 24
5.8.2 Modify . 24
5.8.3 Subtract . 25
5.8.4 Move . 25
5.8.5 AuditValue . 25
5.8.6 AuditCapabilities . 25
5.8.7 Notify . 26
5.8.8 ServiceChange . 26
5.8.9 Manipulating and auditing context attribute s . 28
5.9 Generic command syntax and encoding . 28
5.10 Transactions . 28
5.11 Messages . 29
5.12 Transport . 29
5.13 Security . 30
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3GPP TS 29.238 version 15.0.0 Release 15 4 ETSI TS 129 238 V15.0.0 (2018-10)
5.14 Packages . 30
5.14.1 Mandatory Packages . 30
5.14.2 Optional Packages . 31
5.14.3 Package usage information . 32
5.14.3.1 Generic (g) . 32
5.14.3.2 Base root (root) . 33
5.14.3.3 Differentiated Services (ds) . 34
5.14.3.4 Gate Management (gm) . 35
5.14.3.5 Traffic management (tman) . 36
5.14.3.6 Inactivity Timer (it) . 37
5.14.3.7 IP Domain Connection (ipdc) . 37
5.14.3.8 Media Gateway Overload Control Package (ocp) . 38
5.14.3.9 Hanging Termination Detection (hangterm) . 38
5.14.3.10 Media Gateway Resource Congestion handling Package (chp) . 39
5.14.3.11 IP Realm Availability (ipra) . 39
5.14.3.12 3G Interface Type package (threegint) . 40
5.14.3.13 RTCP Handling Package (rtcph) . 40
5.14.3.14 Application Data Inactivity Detection (adid) . 41
5.14.3.15 Explicit Congestion Notification for RTP-over-UDP Support (ecnrous) . 42
5.14.3.16 MG Act-as STUN Server (mgastuns) . 44
5.14.3.17 Originate STUN Continuity Check (ostuncc) . 45
5.14.3.18 MG located Bearer Level ALG (mgbalg) . 46
5.15 Mandatory support of SDP and Annex C information elements . 47
5.16 Optional support of SDP and Annex C information elements . 51
5.17 Procedures . 54
5.17.1 Formats and Codes . 54
5.17.2 Call Related Procedures . 59
5.17.2.1 General . 59
5.17.2.2 Reserve TrGW Connection Point . 59
5.17.2.3 Configure TrGW Connection Point . 64
5.17.2.4 Reserve and Configure TrGW Connection Point . 73
5.17.2.5 Release TrGW Termination . 82
5.17.2.6 Termination Heartbeat Indication . 82
5.17.2.7 IP Bearer Released . 83
5.17.2.8 Media Inactivity Notification . 83
5.17.2.9 Change Through Connection . 83
5.17.2.10 ECN FailureIndication . 84
5.17.2.11 Change Flow Direction . 84
5.17.2.12 ICE Connectivity Check Result Notification . 85
5.17.2.13 ICE New Peer Reflexive Candidate Notification . 85
5.17.3 Non-Call Related Procedures . 86
5.17.3.1 General . 86
5.17.3.2 TrGW Out Of Service . 87
5.17.3.3 TrGW Communication Up . 88
5.17.3.4 TrGW Restoration . 88
5.17.3.5 TrGW Register . 88
5.17.3.6 TrGW Re-Register . 89
5.17.3.7 IBCF Ordered Re-register . 90
5.17.3.8 IBCF Restoration . 90
5.17.3.9 IBCF Out of Service. 91
5.17.3.10 Audit Value . 91
5.17.3.11 Command Rejected . 93
5.17.3.12 TrGW Capability Change . 93
5.17.3.13 TrGW Resource Congestion Handling – Activate . 93
5.17.3.14 TrGW Resource Congestion Handling – Indication . 94
5.17.3.15 Inactivity Timeout – Activation . 94
5.17.3.16 Inactivity Timeout – Indication . 95
5.17.3.17 Realm Availability Change – Activation . 95
5.17.3.18 Realm Availability Change – Indication . 95
5.17.3.19 Termination Out Of Service . 96
Annex A (informative): Illustration of Gate/Pinhole Concept . 97
ETSI
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3GPP TS 29.238 version 15.0.0 Release 15 5 ETSI TS 129 238 V15.0.0 (2018-10)
A.1 General . 97
A.2 Relationships between gates and H.248 Streams . 97
Annex B (informative): Void . 98
Annex C (informative): Change history . 99
History . 101
ETSI
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3GPP TS 29.238 version 15.0.0 Release 15 6 ETSI TS 129 238 V15.0.0 (2018-10)
Foreword
rd
This Technical Specification has been produced by the 3 Generation Partnership Project (3GPP).
The contents of the present document are subject to continuing work within the TSG and may change following formal
TSG approval. Should the TSG modify the contents of the present document, it will be re-released by the TSG with an
identifying change of release date and an increase in version number as follows:
Version x.y.z
where:
x the first digit:
1 presented to TSG for information;
2 presented to TSG for approval;
3 or greater indicates TSG approved document under change control.
y the second digit is incremented for all changes of substance, i.e. technical enhancements, corrections,
updates, etc.
z the third digit is incremented when editorial only changes have been incorporated in the document.
ETSI
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3GPP TS 29.238 version 15.0.0 Release 15 7 ETSI TS 129 238 V15.0.0 (2018-10)
1 Scope
The present document describes the protocol to be used on the Interconnection Border Control Function (IBCF) –
Transition Gateway (TrGW) interface and the CS-IBCF – CS-TrGW interface. The basis for this protocol is the H.248
protocol as specified in ITU-T. The Profile provides MG control function for IMS and CS Border Control. The IMS
architecture is described in 3GPP TS 23.228 [2]. The underlying reference model and stage 2 information is described
in Annex I of 3GPP TS 23.228 [2] and in 3GPP TS 29.162 [18]. The CS architecture is described in Annex A of 3GPP
TS 29.235 [17].
This specification describes the application of H.248 Ix profile for both Ix and CS-Ix interfaces (see Figure 1.1 and
Figure 1.2). Required extensions use the H.248 standard extension mechanism. In addition certain aspects of the base
protocol H.248 are not needed for this interface and thus excluded by this profile.
Signalling
HSS
DNS
Bearer
S-CSCF
I-CSCF BGCF
Mx Mx
P-CSCF
Mx
IBCF
Mx
IMS-ALG THIG
Ix
IP-CAN
TrGW
Other IMS/SIP
Border Control
UE
network
Functions
IMS network
Figure 1.1: Reference model for IMS Border Control Functions
SIP-I
CS-IBCF
based
SIP-I
3GPP
IWU ALG THIG
CS
domain/
Mc CS-Ix External
Me d ia/RTP
SIP-I
/UDP/IP
Network
UP-IWU
CS-TrGW
border control
Signalling
logical
Bearer
functions
Figure 1.2: Reference model for CS Border Control Functions
ETSI
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3GPP TS 29.238 version 15.0.0 Release 15 8 ETSI TS 129 238 V15.0.0 (2018-10)
The reference model for the IBCF and the TrGW supporting the ATCF/ATGW function is shown in Figure 1.x below.
Figure 1.3: Reference model for IBCF/TrGW with ATCF/ATGW function
See 3GPP TS 23.237 [38] subclause 5.2 for a comprehensive description of the reference model.
NOTE: The Ix profile is applied over both IMS and CS Ix interfaces.
In the following text the terms IBCF and TrGW also include respectively the CS-IBCF and CS-TrGW functionalities.
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] 3GPP TR 21.905: "Vocabulary for 3GPP Specifications".
[2] 3GPP TS 23.228: "IP Multimedia Subsystem (IMS); Stage 2".
[3] ITU-T Recommendation H.248.1 (2002): "Gateway Control Protocol: Version 2" including the
Corrigendum 1 for Version 2 (03/04).
[4] ETSI TS 183 018 V3.5.1(2009-07): "Telecommunications and Internet converged Services and
Protocols for Advanced Networking (TISPAN); Resource and Admission Control: H.248 Profile
Version 3 for controlling Border Gateway Functions (BGF) in the Resource and Admission
Control Subsystem (RACS); Protocol specification".
[5] ITU-T Recommendation H.248.57 (06/2008): "Gateway control protocol: RTP Control Protocol
Package".
[6] ITU-T Recommendation H.248.43 (06/2008): "Gateway control protocol: Gate Management and
Gate Control packages".
[7] IETF RFC 3605 (2003): "Real Time Control Protocol (RTCP) attribute in Session Description
Protocol (SDP)".
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3GPP TS 29.238 version 15.0.0 Release 15 9 ETSI TS 129 238 V15.0.0 (2018-10)
[8] IETF RFC 4566 (2006): "SDP: Session Description Protocol".
[9] IETF RFC 4975 (2007): "The Message Session Relay Protocol (MSRP)".
[10] IETF RFC 3551 (2003): "RTP Profile for Audio and Video Conferences with Minimal Control".
[11] IETF RFC 4145 (2005): "TCP-Based Media Transport in the Session Description Protocol (SDP)".
[12] ITU-T Recommendation H.248.52 (06/2008): "Gateway control protocol: QoS support packages ".
[13] ITU-T Recommendation H.248.53 (06/2008) inclusive Revision 1 (03/2009): "Gateway control
protocol: Traffic management packages".
[14] ITU-T Recommendation H.248.41 Amendment 1 (06/2008): "Gateway control protocol: IP
domain connection package: IP Realm Availability Package".
[15] ITU-T Recommendation H.248.36 (09/2005): "Gateway control protocol: Hanging Termination
Detection package".
[16] ITU-T Recommendation H.248.11 (11/2002): "Gateway control protocol: Media gateway overload
control package".
Inclusive Corrigendum 1 (06/2008) to H.248.11 "Gateway control protocol: Media gateway
overload control package: Clarifying MG-overload event relationship to ADD commands".
[17] 3GPP TS 29.235:
...