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TECHNICAL SPECIFICATION
Universal Mobile Telecommunications System (UMTS);
UTRAN Iu interface signalling transport
(3GPP TS 25.412 version 16.0.0 Release 16)
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3GPP TS 25.412 version 16.0.0 Release 16 1 ETSI TS 125 412 V16.0.0 (2020-08)
Reference
RTS/TSGR-0325412vg00
Keywords
UMTS
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3GPP TS 25.412 version 16.0.0 Release 16 2 ETSI TS 125 412 V16.0.0 (2020-08)
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Legal Notice
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. These shall be
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ETSI
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3GPP TS 25.412 version 16.0.0 Release 16 3 ETSI TS 125 412 V16.0.0 (2020-08)
Contents
Intellectual Property Rights . 2
Legal Notice . 2
Modal verbs terminology . 2
1 Scope . 5
2 References . 5
3 Abbreviations . 6
4 Data Link Layer . 7
4.1 ATM Transport Option . 7
4.2 IP Transport Option . 7
5 RANAP Signalling Bearer . 7
5.1 Introduction . 7
5.2 Signalling Bearer for Circuit Switched Domain . 7
5.2.1 Protocol Stack for the CS Domain . 7
5.2.2 ATM Transport Option . 8
5.2.3 IP Transport Option . 8
5.3 Signalling Bearer for Packet Switched Domain . 9
5.3.1 Protocol Stack for the PS Domain . 9
5.3.2 ATM Transport Option 1 . 9
5.3.3 ATM Transport Option 2 . 10
5.3.4 IP Transport Option . 10
5.4 Services Provided by the Signalling Bearer . 10
Annex A (informative): Change History . 11
History . 12
ETSI
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3GPP TS 25.412 version 16.0.0 Release 16 4 ETSI TS 125 412 V16.0.0 (2020-08)
Foreword
rd
This Technical Specification (TS) 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 25.412 version 16.0.0 Release 16 5 ETSI TS 125 412 V16.0.0 (2020-08)
1 Scope
The present document specifies the standards for Signalling Transport to be used across Iu Interface. Iu Interface is a
logical interface between the RNC and the UTRAN Core Network. The present document describes how the RANAP
signalling messages are transported over Iu.
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] ITU-T Recommendation Q.2100 (1994-07): "B-ISDN Signalling ATM Adaptation Layer (SAAL)
- overview description".
[2] ITU-T Recommendation Q.2110 (1994-07): "B-ISDN ATM Adaptation Layer – Service Specific
Connection Oriented Protocol (SSCOP)".
[3] ITU-T Recommendation Q.2140 (1995-02): "B-ISDN ATM adaptation layer – Service Specific
Co-ordination Function for signalling at the Network Node Interface (SSCF AT NNI)".
[4] ITU-T Recommendation Q.2210 (1996-07): "Message transfer part level 3 functions and messages
using the services of ITU-T Recommendation Q.2140".
[5] ITU-T Recommendation I.361 (1995-11): "B-ISDN ATM layer specification".
[6] ITU-T Recommendation I.363.5 (1996-08): "B-ISDN ATM Adaptation Layer Type 5".
[7] ITU-T Recommendation Q.711 (1996-07): "Functional description of the signalling connection
control part".
[8] ITU-T Recommendation Q.712 (1996-07): "Definition and function of Signalling connection
control part messages".
[9] ITU-T Recommendation Q.713 (1996-07): "Signalling connection control part formats and codes".
[10] ITU-T Recommendation Q.714 (1996-07): "Signalling connection control part procedures".
[11] ITU-T Recommendation Q.715 (1996-07): "Signalling connection control part user guide".
[12] ITU-T Recommendation Q.716 (1993-03): "Signalling Connection Control Part (SCCP)
performance".
[13] IETF RFC 791 (1981-09): "Internet Protocol".
[14] IETF RFC 2684 (1999-09): "Multiprotocol Encapsulation over ATM Adaptation Layer 5".
[15] IETF RFC 2225 (1998-04): "Classical IP and ARP over ATM".
[16] IETF RFC 2960 (2000-10): "Stream Control Transmission Protocol".
[17] IETF RFC 3332(2002-09): "Signalling System 7 (SS7) Message Transfer Part 3 (MTP3) – User
Adaptation Layer (M3UA)"
[18] 3GPP TS 25.410: "UTRAN Iu Interface: General Aspects and Principles".
ETSI
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3GPP TS 25.412 version 16.0.0 Release 16 6 ETSI TS 125 412 V16.0.0 (2020-08)
[19] IETF RFC 1661 (1994-07): "The Point-To-Point Protocol (PPP)".
[20] IETF RFC 1662 (1994-07): "PPP in HDLC-like Framing".
[21] IETF RFC 2507 (1999-02): "IP header compression".
[22] IETF RFC 1990 (1996-08): "The PPP Multilink Protocol (MP)".
[23] IETF RFC 2686 (1999-09): "The Multi-Class Extension to Multi-Link PPP".
[24] IETF RFC 2509 (1999-02): "IP Header Compression over PPP".
[25] IETF RFC 2460 (1996-12): "Internet Protocol, Version 6 (Ipv6) Specification".
[26] IETF RFC 2474 (1998-12): "Definition of the Differentiated Services Field (DS Field) in the IPv4
and IPv6 Headers".
[27] Void.
[28] IETF RFC 3031 (2001-01): "MPLS".
[29] IETF RFC 3153 (2001-08): "PPPmultiplexing".
[30] IETF RFC 3309 (2002-09): "SCTP Checksum Change".
[31] ANSI T1.111-2001: "Signalling System Number 7 (SS7) - Message Transfer Part (MTP)".
[32] ANSI T1.112-2001: "Signalling System Number 7 (SS7) -- Signalling Connection Control Part
(SCCP)".
[33] ANSI T1.645-1995 (R2003), "B-ISDN Signaling ATM Adaptation Layer - Service Specific
Coordination Function for Support of Signaling at the Network Node Interface (SSCF at the
NNI)".
3 Abbreviations
For the purposes of the present document, the following abbreviations apply:
AAL ATM Adaptation Layer
AAL2 ATM Adaptation Layer 2
AAL5 ATM Adaptation Layer 5
ATM Asynchronous Transfer Mode
CS Circuit Switched
DiffServ Differentiated Services
HDLC High Level Data Link Control
IP I
...