1、 ETSI TS 125 412 V15.0.0 (2018-07) Universal Mobile Telecommunications System (UMTS); UTRAN Iu interface signalling transport (3GPP TS 25.412 version 15.0.0 Release 15) TECHNICAL SPECIFICATION ETSI ETSI TS 125 412 V15.0.0 (2018-07)13GPP TS 25.412 version 15.0.0 Release 15Reference RTS/TSGR-0325412vf
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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13、cument does not constitute an endorsement by ETSI of products, services or organizations associated with those trademarks. Foreword This Technical Specification (TS) has been produced by ETSI 3rd Generation Partnership Project (3GPP). The present document may refer to technical specifications or rep
14、orts 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 http:/webapp.etsi.org/key/queryform.asp. Modal verbs termino
15、logy 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 E
16、TSI deliverables except when used in direct citation. ETSI ETSI TS 125 412 V15.0.0 (2018-07)33GPP TS 25.412 version 15.0.0 Release 15Contents Intellectual Property Rights 2g3Foreword . 2g3Modal verbs terminology 2g31 Scope 5g32 References 5g33 Abbreviations . 6g34 Data Link Layer . 7g34.1 ATM Transp
17、ort 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 7g35.2.2 ATM Transport Option . 8g35.2.3 IP Transport Option 8g35.3 Signalling Bearer for Packet Switched Domain .
18、 9g35.3.1 Protocol Stack for the PS Domain 9g35.3.2 ATM Transport Option 1 9g35.3.3 ATM Transport Option 2 9g35.3.4 IP Transport Option 10g35.4 Services Provided by the Signalling Bearer . 10g3Annex A (informative): Change History 11g3History 12g3ETSI ETSI TS 125 412 V15.0.0 (2018-07)43GPP TS 25.412
19、 version 15.0.0 Release 15Foreword This Technical Specification (TS) has been produced by the 3rdGeneration 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
20、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 documen
21、t 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 ETSI TS 125 412 V15.0.0 (2018-07)53GPP TS 25.412 v
22、ersion 15.0.0 Release 151 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
23、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, su
24、bsequent 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-
25、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 lay
26、er 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 A
27、TM 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 connecti
28、on 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
29、 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
30、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 ETSI TS 125 412 V15.0.0 (2018-07)63GPP TS
31、25.412 version 15.0.0 Release 1519 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): “Th
32、e 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 Head
33、ers“. 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) - Signal
34、ling 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 abbrev
35、iations 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 Internet Protocol M3UA SS7 MTP3 User Adaptation Layer ML/MC-PPP Muti-Link/Multi-Cla
36、ss 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 Radio Access Network Application Part RNC Radio Network Controller SAAL-NNI Signalling ATM Adaptation Layer Network N
37、ode Interface SCCP Signalling Connection Control Part SCTP Stream Control Transmission Protocol SGSN Serving GPRS Support Node SSCF Service Specific Co-ordination Function SSCOP Service Specific Connection Oriented Protocol ETSI ETSI TS 125 412 V15.0.0 (2018-07)73GPP TS 25.412 version 15.0.0 Release
38、 154 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 Iu interface is the cell header format and encoding at NNI (see Figure 3/I.361). 4.2 IP Transport Option An RNC/CN
39、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 other data link layer protocol (e.g. PPPMux (IETF RFC 3153 29)/AAL5/ATM, PPP/AAL2/ATM, Ethernet, MPLS (IETF RFC 3031
40、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 shall also support IP Header Compression (IETF RFC 2507 21) and the PPP extensions ML/MC-PPP (IETF RFC 1990 22, IETF RFC
41、 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 subclause specifies the Signalling Bearer protocol stack that supports the RANAP signalling protocol. The following requ
42、irements on the Signalling Bearer can be stated: - provide reliable transfer of control plane signalling messages in both connectionless mode and connection-oriented mode; - provide separate independent connections for distinguishing transactions with individual UEs; - supervise the UE connections a
43、nd provide connection status information to the Upper Layers for individual UEs; - provide networking and routing functions; - provide redundancy in the signalling network; - provide load sharing. 5.2 Signalling Bearer for Circuit Switched Domain 5.2.1 Protocol Stack for the CS Domain The protocol s
44、tacks 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 the Iu IP CS domain, the point at which the service primitives are invoked. A single SAP is defined independently of
45、the signalling bearer. The SAP provides the SCCP primitives. The figure is not intended to constrain the architecture. The 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 requirem
46、ents. Figure 1 shows, for the CS domain, the point at which the service primitives are invoked. The SAP provides the SCCP primitives. ETSI ETSI TS 125 412 V15.0.0 (2018-07)83GPP TS 25.412 version 15.0.0 Release 15SCCP-SAPRANAPIu-CS Control PlaneMTP3-BSCCPSAAL-NNIATMSCTP M3UA IP Data Link RANAP Iu-CS
47、 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 Transport Option 1. SCCP (ITU-T Rec. Q.711 7 or ANSI T1.112-2001 32) provides connectionless service, class 0, connec
48、tion 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 basis. 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) provide
49、s 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 need 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) an
