1、 ETSI TS 125 412 V14.0.0 (2017-04) Universal Mobile Telecommunications System (UMTS); UTRAN Iu interface signalling transport (3GPP TS 25.412 version 14.0.0 Release 14) TECHNICAL SPECIFICATION ETSI ETSI TS 125 412 V14.0.0 (2017-04)13GPP TS 25.412 version 14.0.0 Release 14Reference RTS/TSGR-0325412ve
2、00 Keywords UMTS ETSI 650 Route des Lucioles F-06921 Sophia Antipolis Cedex - FRANCE Tel.: +33 4 92 94 42 00 Fax: +33 4 93 65 47 16 Siret N 348 623 562 00017 - NAF 742 C Association but non lucratif enregistre la Sous-Prfecture de Grasse (06) N 7803/88 Important notice The present document can be do
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7、he written authorization of ETSI. The copyright and the foregoing restriction extend to reproduction in all media. European Telecommunications Standards Institute 2017. All rights reserved. DECTTM, PLUGTESTSTM, UMTSTMand the ETSI logo are Trade Marks of ETSI registered for the benefit of its Members
8、. 3GPPTM and LTE are Trade Marks of ETSI registered for the benefit of its Members and of the 3GPP Organizational Partners. GSM and the GSM logo are Trade Marks registered and owned by the GSM Association. ETSI ETSI TS 125 412 V14.0.0 (2017-04)23GPP TS 25.412 version 14.0.0 Release 14Intellectual Pr
9、operty Rights IPRs essential or potentially essential to the present document 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);
10、 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 car
11、ried 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. Foreword This Technical Specification (TS) has been produced by ETSI 3rd Gen
12、eration 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, 3GP
13、P and ETSI identities can be found under http:/webapp.etsi.org/key/queryform.asp. 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 Draft
14、ing 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 ETSI TS 125 412 V14.0.0 (2017-04)33GPP TS 25.412 version 14.0.0 Release 14Contents Intellectual Property Rights 2g3Foreword . 2g3Modal verbs
15、 terminology 2g3Foreword . 4g31 Scope 5g32 References 5g33 Abbreviations . 6g34 Data Link Layer . 7g34.1 ATM Transport Option 7g34.2 IP Transport Option 7g35 RANAP Signalling Bearer . 7g35.1 Introduction 7g35.2 Signalling Bearer for Circuit Switched Domain . 7g35.2.1 Protocol Stack for the CS Domain
16、 7g35.2.2 ATM Transport Option . 8g35.2.3 IP Transport Option 8g35.3 Signalling Bearer for Packet Switched Domain . 9g35.3.1 Protocol Stack for the PS Domain 9g35.3.2 ATM Transport Option 1 9g35.3.3 ATM Transport Option 2 10g35.3.4 IP Transport Option 10g35.4 Services Provided by the Signalling Bear
17、er . 10g3Annex A (informative): Change History 11g3History 12g3ETSI ETSI TS 125 412 V14.0.0 (2017-04)43GPP TS 25.412 version 14.0.0 Release 14Foreword This Technical Specification (TS) has been produced by the 3rdGeneration Partnership Project (3GPP). The contents of the present document are subject
18、 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 dig
19、it: 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 ed
20、itorial only changes have been incorporated in the document. ETSI ETSI TS 125 412 V14.0.0 (2017-04)53GPP TS 25.412 version 14.0.0 Release 141 Scope The present document specifies the standards for Signalling Transport to be used across Iu Interface. Iu Interface is a logical interface between the RN
21、C 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 (iden
22、tified 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 re
23、ference 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
24、 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 function
25、s 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 signalli
26、ng 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 connecti
27、on 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): “Multip
28、rotocol 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 3
29、GPP TS 25.410: “UTRAN Iu Interface: General Aspects and Principles“. ETSI ETSI TS 125 412 V14.0.0 (2017-04)63GPP TS 25.412 version 14.0.0 Release 1419 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
30、 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
31、“. 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 S
32、ystem 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 Netwo
33、rk 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
34、 High Level Data Link Control IP Internet Protocol M3UA SS7 MTP3 User Adaptation Layer ML/MC-PPP Muti-Link/Multi-Class PPP MPLS Multiprotocol Label Switching MSC Mobile services Switching Center MTP3-B Message Transfer Part PPP Point-to-Point protocolPPPMux PPP Multiplexing PS Packet SwitchedRANAP R
35、adio Access Network Application Part RNC Radio Network Controller SAAL-NNI Signalling ATM Adaptation Layer Network Node Interface SCCP Signalling Connection Control Part SCTP Stream Control Transmission Protocol SGSN Serving GPRS Support Node SSCF Service Specific Co-ordination Function SSCOP Servic
36、e Specific Connection Oriented Protocol ETSI ETSI TS 125 412 V14.0.0 (2017-04)73GPP TS 25.412 version 14.0.0 Release 144 Data Link Layer 4.1 ATM Transport Option ATM shall be used in the radio network control plane according to (ITU-T Rec. I.361 5). The structure of the cell header used in the UTRAN
37、 Iu interface is the cell header format and encoding at NNI (see Figure 3/I.361). 4.2 IP Transport Option An RNC/CN using IP transport option shall support the PPP protocol with HDLC framing (IETF RFC 1661 19, IETF RFC 1662 20). Note: This does not preclude the single implementation and use of any o
38、ther data link layer protocol (e.g. PPPMux (IETF RFC 3153 29)/AAL5/ATM, PPP/AAL2/ATM, Ethernet, MPLS (IETF RFC 3031 28)/ATM, etc.) fulfilling the UTRAN requirements toward the upper Layers. An RNC/CN using IP transport option having interfaces connected via low bandwidth PPP links like E1/T1/J1 shal
39、l also support IP Header Compression (IETF RFC 2507 21) and the PPP extensions ML/MC-PPP (IETF RFC 1990 22, IETF RFC 2686 23). In this case, the negotiation of header compression (IETF RFC 2507 21) over PPP shall be performed via IETF RFC 2509 24. 5 RANAP Signalling Bearer 5.1 Introduction This subc
40、lause specifies the Signalling Bearer protocol stack that supports the RANAP signalling protocol. The following requirements on the Signalling Bearer can be stated: - provide reliable transfer of control plane signalling messages in both connectionless mode and connection-oriented mode; - provide se
41、parate independent connections for distinguishing transactions with individual UEs; - supervise the UE connections and provide connection status information to the Upper Layers for individual UEs; - provide networking and routing functions; - provide redundancy in the signalling network; - provide l
42、oad sharing. 5.2 Signalling Bearer for Circuit Switched Domain 5.2.1 Protocol Stack for the CS Domain The protocol stacks for the CS Domain are shown in figure 1. The standard allows operators to choose one out of two standardised protocol suites for transport of SCCP messages. Figure 1 shows, for t
43、he Iu IP CS domain, the point at which the service primitives are invoked. A single SAP is defined independently of the signalling bearer. The SAP provides the SCCP primitives. The figure is not intended to constrain the architecture. ETSI ETSI TS 125 412 V14.0.0 (2017-04)83GPP TS 25.412 version 14.
44、0.0 Release 14The following figure 1 also illustrates the protocol model having Broadband Signalling System No.7 as the signalling bearer for RANAP over the Iu interface that fulfils the requirements. Figure 1 shows, for the CS domain, the point at which the service primitives are invoked. The SAP p
45、rovides the SCCP primitives. SCCP-SAPRANAPIu-CS Control PlaneMTP3-BSCCPSAAL-NNIATMSCTP M3UA IP Data Link RANAP Iu-CS Control Plane SCCP SCCP-SAP Protocol stack for ATM transport option Protocol stack for IP transport option Figure 1: SAP between RANAP and its transport for Iu - CS Domain 5.2.2 ATM T
46、ransport Option 1. SCCP (ITU-T Rec. Q.711 7 or ANSI T1.112-2001 32) provides connectionless service, class 0, connection oriented service, class 2, separation of the connections mobile by mobile basis on the connection oriented link and establishment of a connection oriented link mobile by mobile ba
47、sis. SCCP shall be used as specified in TS 25.410 18. 2. MTP3-B (ITU-T Rec. Q.2210 4 or ANSI T1.111-2001 31) provides message routing, discrimination and distribution (for point-to-point link only), signalling link management load sharing and changeover/back between link within one link-set. The nee
48、d for multiple link-sets is precluded. MTB3-B shall comply with ITU-T Rec. Q.2210 4 or ANSI T1.111-2001 31. 3. SAAL-NNI (ITU-T Rec. Q.2100 1) consists of the following sub-layers: - SSCF (ITU-T Rec. Q.2140 3 or ANSI T1.645-1995 (R2003) 33), - SSCOP (ITU-T Rec. Q.2110 2) and AAL5 (ITU-T Rec. I.363.5
49、6). The SSCF maps the requirements of the layer above to the requirements of SSCOP. Also SAAL connection management, link status and remote processor status mechanisms are provided. SSCOP provides mechanisms for the establishment and release of connections and the reliable exchange of signalling information between signalling entities. Adapts the upper layer protocol to the requirements of the Lower ATM cells. It shall be possible to use SAAL-NNI c
