1、 ETSI TS 125 422 V15.0.0 (2018-07) Universal Mobile Telecommunications System (UMTS); UTRAN Iur interface signalling transport (3GPP TS 25.422 version 15.0.0 Release 15) TECHNICAL SPECIFICATION ETSI ETSI TS 125 422 V15.0.0 (2018-07)13GPP TS 25.422 version 15.0.0 Release 15Reference RTS/TSGR-0325422v
2、f00 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 d
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13、ocument 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 re
14、ports 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 termin
15、ology 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
16、ETSI deliverables except when used in direct citation. ETSI ETSI TS 125 422 V15.0.0 (2018-07)33GPP TS 25.422 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 Trans
17、port Option 7g34.2 IP Transport Option 7g35 RNSAP Signalling Bearer 7g35.1 Introduction 7g35.2 Signalling Bearer 8g35.2.1 ATM Option 1 8g35.2.2 ATM Option 2 8g35.2.3 IP Transport Option 9g35.3 Services Provided by the Signalling Bearer . 9g3Annex A (informative): Change history . 10g3History 11g3ETS
18、I ETSI TS 125 422 V15.0.0 (2018-07)43GPP TS 25.422 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
19、 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 app
20、roval; 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
21、ETSI TS 125 422 V15.0.0 (2018-07)53GPP TS 25.422 version 15.0.0 Release 151 Scope The present document specifies the standards for Signalling Transport to be used across Iur Interface. Iur Interface is a logical interface between the two RNC of the UMTS Terrestrial Radio Access Network (UTRAN) for t
22、he UMTS system. The present document describes how the RNSAP signalling messages are transported between the two RNCs. 2 References The following documents contain provisions which, through reference in this text, constitute provisions of the present document. g404 References are either specific (id
23、entified by date of publication, edition number, version number, etc.) or non-specific. g404 For a specific reference, subsequent revisions do not apply. g404 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-spe
24、cific 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
25、 - 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 leve
26、l 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 specification: Type 5 AAL“. 7 ITU-T Recommendation Q.711 (1996-07): “Functio
27、nal 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 (1
28、996-07): “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 System No. 7 - Signalling Connection Control Part (SCCP) performance“. 13 IETF RFC 791 (September 1
29、981): “Internet Protocol“. 14 IETF RFC 1483 (July 1993): “Multi protocol Encapsulation over ATM Adaptation Layer 5“. 15 IETF RFC 2225 (April 1998): “Classical IP and ARP over ATM“. 16 IETF RFC 2960 (October 2000): “Stream Control Transmission Protocol“. 17 IETF RFC 3332(2002-09): “Signalling System
30、7 (SS7) Message Transfer Part 3 (MTP3) User Adaptation Layer (M3UA)“ 18 IETF STD 51, RFC 1661 (1994-07): “The Point-To-Point Protocol (PPP)“. ETSI ETSI TS 125 422 V15.0.0 (2018-07)63GPP TS 25.422 version 15.0.0 Release 1519 IETF STD 51, RFC 1662 (1994-07): “PPP in HDLC-like Framing“. 20 IETF RFC 250
31、7 (1999-02): “IP header compression“. 21 IETF RFC 1990 (1996-08): “The PPP Multilink Protocol (MP)“. 22 IETF RFC 2686 (1999-09): “The Multi-Class Extension to Multi-Link PPP“. 23 IETF RFC 2509 (1999-02): “IP Header Compression over PPP“. 24 IETF RFC 2460 (1998-12): “Internet Protocol, Version 6 (Ipv
32、6) Specification“. 25 IETF RFC 2474 (1998-12): “Definition of the Differentiated Services Field (DS Field) in the IPv4 and IPv6 Headers“. 26 Void 27 IETF RFC 3153 (2001-08): “PPP Multiplexing“. 28 IETF RFC 2364 (1998-07): “PPP over AAL5“. 29 IETF RFC 3031 (2001-01): “Multiprotocol Label Switching Ar
33、chitecture“. 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: “Signaling System Number 7 (SS7) - Signaling Connection Control Part (SCCP)“. 33 ANSI T1.645-1995 (R2003): “B-ISDN Signaling AT
34、M 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
35、 Layer 5 ATM Asynchronous Transfer Mode DiffServ Differentiated Services HDLC High level Data Link Control IP Internet Protocol IPv4 Internet Protocol, version 4 IPv6 Internet Protocol, version 6 M3UA SS7 MTP3 User Adaptation layer ML/MC-PPP Muti-Link/Multi-Class PPP MPLS Multiprotocol Label Switchi
36、ng MTP3-B Message Transfer Part level 3 for Q.2140 PLMN Public Land Mobile Network PPP Point-to-Point protocol PPPMux PPP Multiplexing QoS Quality of Service RNC Radio Network Controller RNSAP Radio Network Subsystem Application Part SAAL-NNI Signalling ATM Adaptation Layer - Network Node Interface
37、SCCP Signalling Connection Control Part SCTP Stream Control Transmission Protocol SSCF Service Specific Co-ordination Function SSCOP Service Specific Connection Oriented Protocol UE User Equipment ETSI ETSI TS 125 422 V15.0.0 (2018-07)73GPP TS 25.422 version 15.0.0 Release 154 Data Link Layer 4.1 AT
38、M 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 Iur interface is the cell header format and encoding at NNI (see figure 3 of ITU-T Rec. I.361 5). 4.2 IP Transport Option A UTRAN Node supportin
39、g IP transport option shall support PPP protocol with HDLC framing IETF RFC 1661 18, IETF RFC 1662 19. Note: This does not preclude the single implementation and use of any other data link layer protocols (e.g. PPPMux/AAL5/ATM (IETF RFC 3153 27, IETF RFC 2364 28), PPP/AAL2/ATM, Ethernet, MPLS/ATM (I
40、ETF RFC 3031 29), etc.) fulfilling the UTRAN requirements toward the upper layers. An RNC using IP transport option having interfaces connected via slow bandwidth PPP links like E1/T1/J1 shall also support IP Header Compression IETF RFC 2507 20 and the PPP extensions ML/MC-PPP IETF RFC 1990 21, IETF
41、 RFC 2686 22. In this case, negotiation of header compression IETF RFC 2507 20 over PPP shall be performed via IETF RFC 2509 23. 5 RNSAP Signalling Bearer 5.1 Introduction This subclause specifies the Signalling Bearer protocol stack that supports the RNSAP signalling protocol. The following require
42、ments on the RNSAP 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“ an
43、d 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. ETSI ETSI TS 125 422 V15.0.0 (2018-07)83GPP TS 25.422 version 15.0.0 Release 155.2 Signalling Bearer This subc
44、lause refers to specifications of the Signalling Bearer for the Radio Network Layer protocols. As shown in figure 1, the standard allows operators to choose one out of three protocol suites for transport of SCCP messages. SCCP-SAP SCCP-SAP RNSAP MTP3-B SCTP SCCP SSCF-NNI IP SSCOP AAL5 ATM M3UA SCTP
45、RNSAP SCCP M3UA SCTP IP Data Link PHY ATM Transport Option 1 ATM Transport Option 2 IP Transport Option Figure 1: Signalling bearer for RNSAP 5.2.1 ATM Option 1 1. SCCP ITU-T Rec. Q.711 7 /ITU-T Rec. Q.712 8/ ITU-T Rec. Q.713 9/ ITU-T Rec. Q.714 10/ ITU-T Rec. Q.715 11/ ITU-T Rec. Q.71612 or ANSI T1
46、.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 basis. 2. MTP3-B ITU-T Rec. Q.2210 4 or ANSI T1.111-2001
47、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 need for multiple link-sets is precluded. 3. SAAL-NNI ITU-T Rec. Q.2100 1 consists of the following sub-layer
48、s: - SSCF ITU-T Rec. Q.2140 3 or ANSI T1.645-1995 33, - SSCOP ITU-T Rec. Q.2110 2 and - AAL5 ITU-T Rec. I.363.5 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 p
49、rovides 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. 4. ATM ITU-T Rec. I.361 5. 5.2.2 ATM Option 2 1. SCCP. See subclause 5.2.1 2. M3UA refers to the SCCP adaptation layer “SS7 MTP3 - User Adaptation Layer“IETF RFC 3332 17 also developed by the Sigtran working gro
