JP 3GA 25.412(R99) UTRAN Iu Interface Signalling Transport Versio n 3 May 14, 2 001 THE TELECOMMUNICATION TECHNOLOGY COMMITTEE
JP-3GA-25.412(R99) UTRAN Iu Interface Signalling Transport Remarks 1.Application level of English description Application level : E3 English description is included in the text and figures of main body, annexes and appendices. 2. Relationship with international recommendations and standards This standard is standardized based on the Technical Specification 25.412 (Version 3.6.0) approved by in Dec. 2000. 3. Departures from international recommendations 3.1 Selection of optional items None 3.2 Items of national matter None 3.3 Changes to original standard (1) Standards referred to in the original standard, which are replaced by TTC/ARIB standards. Refer to Table 1. (2) Items added to the original standard None (3) Items deleted from the original standard None (4) Items changed from the original standard None 3.4 Difference in chapter ordering from the original standard. There is no difference in chapter ordering from the original standard. 4. Change history Revision Date Contents V.1 Mar 31, 2000 Newly standardized Oct 25, 2000 Revised based on the Technical Specification 25.412 (Version 3.4.0) approved by May 14, 2001 Revised based on the Technical Specification 25.412 (Version 3.6.0) approved by i JP-3GA-25.412(R99)
5. IPR There is no specific description about IPR in this standard. 6. Others None ii JP-3GA-25.412(R99)
Table 1 Replaced standards referred original standard ITU-T RECOMMENDATION I.361 (11/95) Title : B-ISDN ATM layer specification ITU-T RECOMMENDATION I.363.5 Title : B-ISDN ATM adaptation layer specification : type 5 AAL ITU-T RECOMMENDATION Q.2100 Title : B-ISDN SIGNALLING ATM ADAPTATION LAYER (SAAL) OVERVIEW DESCRIPTION ITU-T RECOMMENDATION Q.2110 Title : B-ISDN ATM ADAPTATION LAYER SERVICE SPECIFIC CONNECTION ORIENTED PROTOCOL (SSCOP) ITU-T RECOMMENDATION Q.2140 Title : B-ISDN ATM ADAPTATION LAYER SERVICE SPECIFIC COORDINATION FUNCTION FOR SIGNALLING AT THE NETWORK NODE INTERFACE (SSCF AT NNI) ITU-T RECOMMENDATION Q.2210 Title : Message transfer part level 3 functions and messages using the services of ITU-T Recommendation Q.2140 ITU-T RECOMMENDATION Q.711 Title : Functional description of the Signalling Connection Control Part replacement TTC STANDARDS JT-I361 (4/96) Title : B-ISDN ATM layer specification TTC STANDARDS JT-I363.5 Title : B-ISDN ATM adaptation layer specification : type 5 AAL TTC STANDARDS JT-Q2100 Title : B-ISDN SIGNALLING ATM ADAPTATION LAYER (SAAL) OVERVIEW DESCRIPTION TTC STANDARDS JT-Q2110 Title : B-ISDN ATM ADAPTATION LAYER SERVICE SPECIFIC CONNECTION ORIENTED PROTOCOL (SSCOP) TTC STANDARDS JT-Q2140 Title : B-ISDN ATM ADAPTATION LAYER SERVICE SPECIFIC COORDINATION FUNCTION FOR SIGNALLING AT THE NETWORK NODE INTERFACE (SSCF AT NNI) TTC STANDARDS JT-Q2210 Title : Message transfer part level 3 functions and messages using the services of ITU-T Recommendation Q.2140 ITU-T Implementors' Guide Title : Implementors' Guide (12/99) for Recommendation Q.2210 (07/96) TTC STANDARDS JT-Q711 Title: Functional description of the Signalling Connection Control Part Note : Contents indicated with # (indicating supplementary information to help understanding) in JT-711, and simultaneously related to following descriptions, shall be considered part of formal JT-711 specification. The related descriptions are, SCCP connection oriented services, and descriptions related to SCCP functions which are based on MTP conforming to JT-Q2210. For descriptions related to SCCP connection oriented services, following sections in TTC standard shall be replaced with corresponding sections in ITU recommendation according to following table. iii JP-3GA-25.412(R99)
ITU-T RECOMMENDATION Q.712 Title : Definition and function of signalling connection control part messages TTC ITU Contents 2.1 6.1 Connection Oriented Services 4.1 8.1 Connection Oriented Functions TTC STANDARDS JT-Q712 Title : Definition and function of signalling connection control part messages Note : Contents indicated with # (indicating supplementary information to help understanding) in JT-712, and simultaneously related to following descriptions, shall be considered part of formal JT-712 specification. The related descriptions are, SCCP connection oriented services, and descriptions related to SCCP functions which are based on MTP conforming to JT-Q2210. For descriptions related to SCCP connection oriented services, following sections in TTC standard shall be replaced with corresponding sections in ITU recommendation according to following table. TTC ITU Contents 1.1 1.1 connection confirm (CC) 1.2 1.2 connection request (CR) 1.1 1.1 connection confirm (CC) 1.2 1.2 connection request (CR) 1.3 1.3 connection refused (CREF) 1.4 1.4 data acknowledgement (AK) 1.5 1.5 data form 1 (DT1) 1.6 1.6 data form 2 (DT2) 1.7 1.7 expedited data (ED) 1.8 1.8 expedited data acknowledgement (EA). 1.9 1.9 inactivity test (IT) 1.10 1.10 protocol data unit error (ERR) 1.11 1.11 released (RLSD) 1.12 1.12 release complete (RLC) 1.13 1.13 reset confirm (RSC) 1.14 1.14 reset request (RSR) 2.4 2.4 credit 2.6 2.6 diagnostic 2.7 2.7 error cause 2.9 2.9 local reference number (source/destination) 2.11 2.11 receive sequence number 2.12 2.12 refusal cause iv JP-3GA-25.412(R99)
2.13 2.13 release cause ITU-T RECOMMENDATION Q.713 Title : Signalling Connection Control Part formats and codes 2.14 2.14 reset cause 2.16 2.16 segmenting/reassembling 2.17 2.17 sequencing/segmenting For descriptions related to SCCP functions which are based on MTP conforming to JT-Q2210, following sections in TTC standard shall be replaced with corresponding sections in ITU recommendation according to following table. TTC ITU Contents 1.25 1.25 long unitdata (LUDT) 1.26 1.26 long unit data service(ludts) 2.23 2.23 long data TTC STANDARDS JT-Q713 Title : Signalling Connection Control Part formats and codes Note : Contents indicated with # (indicating supplementary information to help understanding) in JT-713, and simultaneously related to following descriptions, shall be considered part of formal JT-713 specification. The related descriptions are, SCCP connection oriented services, and descriptions related to SCCP functions which are based on MTP conforming to JT-Q2210. For descriptions related to SCCP connection oriented services, following sections in TTC standard shall be replaced with corresponding sections in ITU recommendation according to following table. TTC ITU Contents 3.2 3.2 Destination local reference 3.3 3.3 Source local reference 3.7 3.7 Segmenting/reassembling 3.8 3.8 Receive sequence number 3.9 3.9 Sequencing/segmenting 3.10 3.10 Credit 3.11 3.11 Release cause 3.13 3.13 Reset cause 3.14 3.14 Error cause 3.15 3.15 Refusal cause 4.2 4.2 Connection request (CR) 4.3 4.3 Connection confirm (CC) v JP-3GA-25.412(R99)
4.4 4.4 Connection refused (CREF) 4.5 4.5 Released (RLSD) 4.6 4.6 Release complete (RLC) 4.7 4.7 Data form 1 (DT1) 4.8 4.8 Data form 2 (DT2) 4.9 4.9 Data acknowledgement (AK) 4.12 4.12 Expedited data (ED) 4.13 4.13 Expedited data acknowledgement (EA) 4.14 4.14 Reset request (RSR) 4.15 4.15 Reset confirm (RSC) 4.16 4.16 Protocol data unit error (ERR) 4.17 4.17 Inactivity test (IT) ITU-T RECOMMENDATION Q.714 Title : Signalling connection control part procedures For descriptions related to SCCP functions which are based on MTP conforming to JT-Q2210, following sections in TTC standard shall be replaced with corresponding sections in ITU recommendation according to following table. TTC ITU Contents 3.20 3.20 Long data 4.20 4.20 Long unitdata (LUDT) 4.21 4.21 Long unitdata service (LUDTS) TTC STANDARDS JT-Q714 Title : Signalling connection control part procedures Note : Contents indicated with # (indicating supplementary information to help understanding) in JT-Q714, and simultaneously related to following descriptions, shall be considered part of formal JT-Q714 specification. The related descriptions are, SCCP connection oriented services, and descriptions related to SCCP functions which are based on MTP conforming to JT-Q2210. For descriptions related to SCCP connection oriented services, following sections in TTC standard shall be replaced with corresponding sections in ITU recommendation according to following table. TTC ITU Contents 1.1 1.1 general characteristics of SCCP 1.2 1.2 procedures for connection-oriented services 2.5 2.5 compatibility test 2.6 2.6 traffic limitation mechanism 3. 3. connection-oriented procedures vi JP-3GA-25.412(R99)
4.1 4.1 data transfer 5. 5. SCCP management procedures 3G TS 25.410 Title : UTRAN Iu Interface : General Aspects and Principles TTC STANDARDS JP-3GA-25.410(R99) Title : UTRAN Iu Interface : General Aspects and Principles vii JP-3GA-25.412(R99)
TS 25.412 V3.6.0 (2000-12) Technical Specification 3rd Generation Partnership Project; Technical Specification Group Radio Access Network; UTRAN Iu Interface Signalling Transport (Release 1999) The present document has been developed within the 3 rd Generation Partnership Project ( TM ) and may be further elaborated for the purposes of. The present document has not been subject to any approval process by the Organisational Partners and shall not be implemented. This Specification is provided for future development work within only. The Organisational Partners accept no liability for any use of this Specification. Specifications and reports for implementation of the TM system should be obtained via the Organisational Partners' Publications Offices.
Release 1999 TS 25.412 V3.6.0 (2000-12) 2 Keywords UMTS Postal address support office address 650 Route des Lucioles - Sophia Antipolis Valbonne - FRANCE Tel.: +33 4 92 94 42 00 Fax: +33 4 93 65 47 16 Internet http://www.3gpp.org Copyright Notification No part may be reproduced except as authorized by written permission. The copyright and the foregoing restriction extend to reproduction in all media. 2000, Organizational Partners (ARIB, CWTS, ETSI, T1, TTA,TTC). All rights reserved.
Release 1999 TS 25.412 V3.6.0 (2000-12) 3 Contents 1 Scope... 5 2 References... 5 3 Abbreviations... 6 4 ATM Layer... 6 4.1 General...6 5 RANAP Signalling Bearer... 6 5.1 Introduction...6 5.2 Signalling Bearer for Circuit Switched Domain...7 5.2.1 Protocol Stack for the CS Domain...7 5.2.1 Protocol Services...7 5.2.1.1 SCCP Services...7 5.2.1.2 MTP3-B Services...7 5.2.1.3 SAAL-NNI Services...7 5.3 Signalling Bearer for Packet Switched Domain...8 5.3.1 Protocol Stack for the PS Domain...8 5.3.2 Protocol Services...8 5.3.2.1 SCCP Services...8 5.3.2.2 MTP3-B Services...9 5.3.2.3 SAAL-NNI Services...9 5.3.2.4 M3UA Services...9 5.3.2.5 SCTP Services...9 5.3.2.6 AAL5 Services...9 5.4 Services Provided by the Signalling Bearer...9 Annex A (informative): Change History... 10
Release 1999 TS 25.412 V3.6.0 (2000-12) 4 Foreword This Technical Specification (TS) has been produced by the 3 rd Generation Partnership Project (). 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.
Release 1999 TS 25.412 V3.6.0 (2000-12) 5 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. [1] ITU-T Recommendation Q.2100 (07/1994): "B-ISDN Signalling ATM Adaptation Layer (SAAL) - overview description". [2] ITU-T Recommendation Q.2110 (07/1994): "B-ISDN ATM Adaptation Layer Service Specific Connection Oriented Protocol (SSCOP)". [3] ITU-T Recommendation Q.2140 (02/1995): "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 (07/1996): "Message transfer part level 3 functions and messages using the services of ITU-T Recommendation Q.2140". [5] ITU-T Recommendation I.361 (11/1995): "B-ISDN ATM layer specification". [6] ITU-T Recommendation I.363.5 (08/1996): "B-ISDN ATM Adaptation Layer Type 5". [7] ITU-T Recommendation Q.711 (07/1996): "Functional description of the signalling connection control part". [8] ITU-T Recommendation Q.712 (07/1996): "Definition and function of Signalling connection control part messages". [9] ITU-T Recommendation Q.713 (07/1996): "Signalling connection control part formats and codes". [10] ITU-T Recommendation Q.714 (07/1996): "Signalling connection control part procedures". [11] ITU-T Recommendation Q.715 (07/1996): "Signalling connection control part user guide". [12] ITU-T Recommendation Q.716 (03/1993): "Signalling Connection Control Part (SCCP) performance". [13] IETF RFC 791 (09/1981): "Internet Protocol". [14] IETF RFC 2684 (09/1999): "Multiprotocol Encapsulation over ATM Adaptation Layer 5". [15] IETF RFC 2225 (04/1998): "Classical IP and ARP over ATM". [16] IETF RFC 2960 (10/2000): "Stream Control Transmission Protocol". [17] G. Sidebottom et al, "SS7 MTP3 User Adaptation Layer", draft-ietf-sigtran-m3ua-04.txt (Work In Progress), IETF, September 2000. [18] TS 25.410: "UTRAN Iu Interface: General Aspects and Principles".
Release 1999 TS 25.412 V3.6.0 (2000-12) 6 3 Abbreviations For the purposes of the present document, the following abbreviations apply: AAL ATM Adaptation Layer AAL5 ATM Adaptation Layer 5 ATM Asynchronous Transfer Mode CS Circuit Switched IP Internet Protocol M3UA SS7 MTP3 User Adaptation Layer MTP3-B Message Transfer Part PS Packet Switched RANAP Radio 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 SSCF Service Specific Co-ordination Function SSCOP Service Specific Connection Oriented Protocol 4 ATM Layer 4.1 General ATM shall be used in the radio network control plane according to 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). 5 RANAP Signalling Bearer 5.1 Introduction This subclause 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 connectionoriented mode; - provide separate independent connections for distinguishing transactions with individual UE's; - supervise the 'UE connections' and provide connection status information to the Upper Layers for individual UE's; - provide networking and routing functions; - provide redundancy in the signalling network; - provide load sharing.
Release 1999 TS 25.412 V3.6.0 (2000-12) 7 5.2 Signalling Bearer for Circuit Switched Domain 5.2.1 Protocol Stack for the CS Domain The following figure 1 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 provides the SCCP primitives. Iu-CS Control Plane RANAP SCCP-SAP SCCP MTP3-B SAAL-NNI ATM Figure 1: SAP between RANAP and its transport for Iu - CS Domain 1. SCCP [7] 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 [4] 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 linksets is precluded. 3. SAAL-NNI [1] consists of the following sub-layers: - SSCF [3], - SSCOP [2] and AAL5 [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. 4. ATM [5]. 5.2.1 Protocol Services 5.2.1.1 SCCP Services SCCP shall be used as specified in [18]. 5.2.1.2 MTP3-B Services MTB3-B shall comply with [4]. 5.2.1.3 SAAL-NNI Services It shall be possible to use SAAL-NNI connections pre-configured as PVCs for signalling transport on the Iu-Interface.
Release 1999 TS 25.412 V3.6.0 (2000-12) 8 5.3 Signalling Bearer for Packet Switched Domain 5.3.1 Protocol Stack for the PS Domain The protocol stacks for the PS Domain is shown in figure 2. The standard allows operators to choose one out of two standardised protocol to suites for transport of SCCP messages. Iu-PS Control Plane RANAP SCCP-SAP SCCP M3UA MTP3-B SCTP SAAL-NNI ATM IP AAL5 Figure 2: SAP between RANAP and its transport for the Iu IP domain Figure 2 shows, for the Iu IP 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. 1. SCCP [7] 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 [4] 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 linksets is precluded. 3. SAAL-NNI [1] consists of the following sub-layers: - SSCF-NNI [3], - SSCOP [2] and AAL5 [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. 4. ATM [5]. 5. SCTP [16] refers to the Stream Control Transmission Protocol [16] developed by the Sigtran working group of the IETF for the purpose of transporting various signalling protocols over IP networks. M3UA refers to the SCCP adaptation layer "SS7 MTP3 User Adaptation Layer " [17] also developed by the Sigtran working group of the IETF. 6. IP [13] over ATM is defined in [14] and [15]. 5.3.2 Protocol Services 5.3.2.1 SCCP Services SCCP shall be used as specified in [18].
Release 1999 TS 25.412 V3.6.0 (2000-12) 9 5.3.2.2 MTP3-B Services MTB3-B shall comply with [4]. 5.3.2.3 SAAL-NNI Services It shall be possible to use SAAL-NNI connections pre-configured as PVCs for signalling transport on the Iu-Interface. 5.3.2.4 M3UA Services An RNC equipped with the M3UA stack option shall have client functionality. This enables the RNC to report to the SGSN when it is a newly introduced entity in the network. 5.3.2.5 SCTP Services The multi-homing services of SCTP shall be required at both ends of an SCTP-association to enable transport redundancy and reliability. 5.3.2.6 AAL5 Services It shall be possible to use AAL5 connections pre-configured as PVCs for slgnalling transport on the Iu-Interface. 5.4 Services Provided by the Signalling Bearer When considering the requirements that the upper layers, i.e. RANAP, have on the Signalling Bearer, there are a number of services it has to provide and a number of functions to perform. These numbers of services that the signalling bearer shall provide, to the upper layers, are stated in references [7] to [12].
Release 1999 TS 25.412 V3.6.0 (2000-12) 10 Annex A (informative): Change History Change history TSG RAN# Version CR Tdoc RAN New Version Subject/Comment RAN_04 - - - 3.0.0 Approved at TSG RAN #4 by correspondence and placed under Change Control RAN_05 3.0.0 - - 3.1.0 Approved at TSG RAN #5 RAN_06 3.1.0 001 RP-99744 3.2.0 Approved at TSG RAN #6 RAN_07 3.2.0 - RP-000077 3.3.0 Approved at TSG RAN #7 (2 approved CRs) RAN_07 3.3.0 - RP-000233 3.4.0 Approved at TSG RAN #8 RAN_09 3.4.0 005 RP-000372 3.5.0 Approved at TSG RAN #9 RAN_10 3.5.0 006 007 008 RP-000611 3.6.0 Approved at TSG RAN #10