ETSI TS 102 143-2003 Services and Protocols for Advanced Networks (SPAN) MTP SSCOP and SIGTRAN (Transport of SS7 over IP) Signalling connection control part User Adaptation layer (.pdf

1、ETSI TS 102 143 1.1.1 (2003-05) Technical Specificafion Services and Protocols for Advanced Networks (SPAN); MTP/SCCP/SSCOP and SIGTRAN (Transport of SS7 over IP); Signalling connection control part User Adaptation layer (SUA) Endorsement of SIGTRAN-SUA-14 (December 2002), modified 2 ETSI TS 102 143

2、 VI .I .I (2003-05) Reference DTSISPAN-I30264 Keywords MTP, SCCP, SIGTRAN, SS7, SUA, endorsement ETSI 650 Route des Lucioles F-O6921 Sophia Antipolis Cedex - FRANCE Tel.: +33 4 92 94 42 O0 Fax: +33 4 93 65 47 16 Siret No 348 623 562 00017 - NAF 742 C Association but non lucratif enregistre la Sous-p

3、rfecture de Grasse (06) No 7803/88 Important notice Individual copies of the present document can be downloaded from: http:lwmv.etsi .arq The present document may be made available in more than one electronic version or in print. In any case of existing or perceived difference in contents between su

4、ch versions, the reference version is the Portable Document Format (PDF). In case of dispute, the reference shall be the printing on ETSI printers of the PDF version kept on a specific network drive within ETSI Secretariat. Users of the present document should be aware that the document may be subje

5、ct to revision or change of status. Information on the current status of this and other ETSI documents is available at ha p:/pa rta I. etsi I a rgltbistat uslstatus .as p If you find errors in the present document, send your comment to: Cori vriaht Notifica tion No part may be reproduced except as a

6、uthorized by written permission. The copyright and the foregoing restriction extend to reproduction in all media. O European Telecommunications Standards Institute 2003. All rights reserved. DECTTM, PLUGTESTSTMand UMTSTMare Trade Marks of ETSI registered for the benefit of its Members. TIPHONTM and

7、the TIPHON logo are Trade Marks currently being registered by ETSI for the benefit of its Members. 3GPPTM is a Trade Mark of ETSI registered for the benefit of its Members and of the 3GPP Organizational Partners. ETSI 3 ETSI TS 102 143 VI .I .I (2003-05) Contents Intellectual Property Rights . .4 Fo

8、reword . 4 Endorsement notice . .4 Introduction . .4 1 2 3 4 4.1 4.2 4.3 4.4 4.5 4.6 4.7 4.8 5 5.1 5.2 5.3 5.4 5.5 5.6 6 Scope 5 References . .5 Abbreviations .6 General considerations applicable to transport of Signalling System No. 7 over IP . .6 Transport protocol 7 7 SCTP considerations . . 7 Na

9、tional options . 7 Application Server mod . 7 Application Server state . . 7 Dynamic registration. . Message distribution to the Application Server. 7 7 Receipt of unrecognized messages . General considerations applicable to SUA .7 National options . . 7 Dynamic registration 8 Message distribution t

10、o the Application Server 8 SUA procedures . 8 Class 3 operation 8 N-PCSTATE primitive. 8 Modifications to SUA-14 .8 Annex A (informative): Bibliography . 22 History . .23 ETSI 4 ETSI TS 102 143 VI .I .I (2003-05) Intellectual Property Rights IPRs essential or potentially essential to the present doc

11、ument 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 (7PRs); Essential, orpotentially Essential, IPRs notlJied to ETSI in respect of

12、ETSI standards“, which is available from the ETSI Secretariat. Latest updates are available on the ETSI Web server (5). All published ETSI deliverables shall include information which directs the reader to the above source of information. Foreword This Technical Specification (TS) has been produced

13、by ETSI Technical Committee Services and Protocols for Advanced Networks (SPAN). Endorsement notice The elements of Internet Engineering Task Force Internet Draft draft-ietf-sigtran-sua-14 3, apply with the following modifications. I n t rod uct ion The present document records the changes to the In

14、ternet Engineering Task Force (IETF) draft SUA document. IETF drafts are transient documents, eventually the SUA draft is expected to be replaced with an RFC, which will persist on the IETF website. However, ETSI will keep a copy of the IETF draft on its website until the present document is replace

15、d. See 3 below for more information. ETSI 5 ETSI TS 102 143 VI .I .I (2003-05) I 1 Scope The present document is applicable to the international network and does not intend to restrict national networks. However to facilitate intenvorking, its adoption within national networks is preferred. The pres

16、ent document specifies the Signalling Connection Control Part (SCCP) User Adaptation layer signalling protocol for connecting SCCP Users via Signalling System No. 7 SCCP international relay points and signalling gateways to SCCP Users in an Internet Protocol (IP) managed network. The present documen

17、t endorses and constrains where relevant the SIGTRAN SUA of 3. 2 Re fe re nces 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 andor edition number or ve

18、rsion number) or non-specific. For a specific reference, subsequent revisions do not apply. For a non-specific reference, the latest version applies. Referenced documents which are not found to be publicly available in the expected location might be found at InttD:/doctsox.etsi .o-rpRefercncc. il ET

19、SI EN 300 009-1 : “Signalling Connection Control part (SCCP) (connectionless and connection- oriented) to support international interconnection“. ETSI EN 300 008-1 : “Integrated Services Digital Network (ISDN); Signalling System N0.7; Message Transfer Part (MTP) to support international interconnect

20、ion; Part 1 : Protocol specification ITU-T Recommendations Q.701, Q.702, Q.703, Q.704, Q.705, Q.706, Q.707 and Q.708 modified I. IETF Internet Draft draft-ietf-sigtran-sua- 14: “Signalling Connection Control Part User Adaptation Layer (SUA)“. 21 31 NOTE: Atu. 41 ITU-T Recommendation Q.7 14: “Specifi

21、cations of Signalling System No. 7, Signalling connection control part procedures“. ETSI EG 201 693: “Integrated Services Digital Network (ISDN); Signalling System N0.7; Master list of codepoints“. ITU-T Recommendation Q.704: “Specifications of Signalling System No. 7, Message Transfer Part, Signall

22、ing network functions and messages“. ITU-T Recommendation Q.711: “Signalling System No.7 - Functional Description of the Signalling Connection Control Part“. ITU-T Recommendation Q.7 13 : “Signalling connection control part formats and codes“. ITU-T Recommendation Q.774: “Transaction capabilities pr

23、ocedures“. ETSI TS 102 144: “Services and Protocols for Advanced Networks (SPAN); MTP/SCCP/SSCOP and SIGTRAN; SCTP“. ETSI TS 102 141: “Services and Protocols for Advanced Networks (SPAN); MTP/SCCP/SSCOP and SIGTRAN (Transport of SS7 over IP); Message transfer part 2 User Adaptation layer (M2UA) Endo

24、rsement of RFC 333 1 (2002), modified“. 51 61 71 SI 91 lo1 111 ETSI 6 ETSI TS 102 143 VI .I .I (2003-05) I21 ETSI TS 102 142: “Services and Protocols for Advanced Networks (SPAN); MTP/SCCP/SSCOP and SIGTRAN (Messag of SS7 over IP); Message transfer part 3 User Adaptation layer (M3UA) Endorsement of

25、RFC 3332 (2002), modified“. IETF RFC 3332 (2002): “Signaling System 7 (SS7) Message Transfer Part 3 (MTP3) - User Adaptation Layer (M3UA)“, G. Sidebottom, K. Morneault, J. Pastor-Balbas. IETF RFC 21 19: “Key words for use in RFCs to Indicate Requirement Levels“. u31 u41 3 Abbreviations For the purpo

26、ses of the present document, the following abbreviations apply: ACTIVE AS ASP ASPSM BEAT BEAT ACK CLDR CLDT COAK CODA CODT COIT CORE DAUD DAVA DRST DUNA DUPU ERR IANA IETF IP RESCO RESRE RFC RIL RKM SCCP SG SGP ss7 ssc S SN SUA ASP ACTIVE Application Server AS Process Application Server Process Stat

27、e Maintenance heartBEAT heartBEAT ACK ConnectionLess Data Response ConnectionLess Data Transfer connection AcKnowledge Connection Oriented Data Acknowledge Connection Oriented Data Transfer Connection Oriented Inactivity Test connection REquest Destination state AUDit Destination AVAilable Destinati

28、on ReSTricted Destination UNAvailable Destination User Part Unavailable ERroR Internet Assigned Numbers Authority Internet Engineering Task Force Internet Protocol RESet Confirm RESet REquest Request For Comment (IETF standard) Restricted Importance Level Routing Key Management Signalling Connection

29、 Control Part Signalling Gateway SG Process Signalling System Number 7 SCCP/Subsystem Congested Subsystem Number SCCP User Adaptation layer 4 General considerations applicable to transport of Signalling System No. 7 over IP The elements of SIGTRAN adaptation layers apply with the following exception

30、s and restrictions. The considerations in this clause are common to TS 102 141 i i, TS 102 142 12 and the present document. ETSI 7 ETSI TS 102 143 VI .I .I (2003-05) 4.1 Transport protocol The protocol underlying the adaptation layer for transport of SS No.7 signalling information in IP networks sha

31、ll be SCTP. 4.2 SCTP cons id erat ions The SCTP used shall conform to TS 102 144 lo. The SCTP payload protocol identifier for messages pertaining to an adaptation layer shall be the one assigned by IANA for that layer. Adaptation layer messages received with neither the IANA payload protocol identif

32、ier nor payload protocol identifier equal to O shall be silently discarded. Unordered user messages shall not be used. 4.3 National options No national options excluded by ETSI standards shall apply to the present document. 4.4 Application Server mode The Broadcast mode shall not be used. 4.5 Applic

33、ation Server state handling If multiple Application Server Processes (ASPS) are used within the AS, the AS shall be considered active when the first ASP becomes active. and shall remain active until the last ASP becomes inactive. 4.6 Dynamic reg ist ra ti on Dynamic registration shall not be used fo

34、r configuration management. The configuration of the system shall be modified only by the management system, and not by the protocol itself. 4.7 Message distri bution to the Application Server The key to enable messages to be distributed to the appropriate AS shall have a granularity no smaller than

35、 is allowed by the network management messages appropriate to that layer. 4.8 Receipt of unrecognized messages If a message with an unrecognized message class is received, a Management Error message shall be returned with Error Code “Unsupported Message Class“. 5 General considerations applicable to

36、 SUA 5.1 National options No national options excluded by EN 300 009-1 i and EN 300 008-1 2 shall apply to the present document. ETSI 8 ETSI TS 102 143 VI .I .I (2003-05) 5.2 Dynamic reg ist ra ti on Dynamic registration of Routing Keys shall not be used for configuration management. The configurati

37、on of the system shall be modified only by the management system, and not by the protocol itself. 5.3 Message distri bution to the Application Server The Routing Key to enable messages to be distributed to the appropriate AS shall have a granularity no smaller than Point Code + SSN. 5.4 SUA procedur

38、es The SUA procedures shall be as defined in 3 augmented by ITU-T Recommendation Q.714 4 as modified by EN 300 009-1 i, except where otherwise defined below. 5.5 Class 3 operation Class 3 operation is not in the scope of the present document. 5.6 N-PCSTATE primitive The N-PCSTATE primitives signalli

39、ng point status parameter (see ITU-T Recommendation Q.711 7 clause 6.3.2.2.5) has in 3 been extended to convey information about the restricted status of the signalling point. However, this shall not be used. 6 Modifications to SUA-I 4 Modificiations to 3 are listed according to the section or subse

40、ction of 3. Section 1 Introduction ANSI references do not apply. Add a reference “ITU SCCP“ NOTE: SCCP user messages are transported between two signalling endpoints. Subsection 1.2 Terminology Routing Key: Dynamic registration of Routing Keys shall not be used for configuration management. The conf

41、iguration of the system shall be modified only by the management system, and not by the protocol itself. Add the definition of Network Appearance taken from RFC 3332 131 (which has been extended for SUA) viz: “Network Appearance - The Network Appearance is an SUA local reference (typically an intege

42、r) shared by SG and AS that together with a Signalling Point Code or global title uniquely identifies an SS7 node by indicating the specific SS7 network it belongs to“. Subsection 1.3.1 Protocol Architecture for Connectionless Transport NOTE: The entity labelled “SEP or STP“ is just an SEP here sinc

43、e it contains an SCCP User. Subsection 1.3.1.1 NOTE: The SG can act as an endpoint with messages routed to it also by global title, if the global title translation there yields the point code of the SG itself. ETSI 9 ETSI TS 102 143 VI .I .I (2003-05) Subsection 1.3.1.2 SG as relay-point NOTE: Globa

44、l Title Translation yields an “entity set“, not an “entity“. A way of viewing the AS is then as an “entity set“, with each ASP that the AS uses viewed as an “entity“ within the set. Subsection 1.3.2 Protocol Architecture for Connection-Oriented Transport Replace the first two sentences by: “In this

45、architecture, the SCCP and SUA layers in the SGP interface to support connection-oriented data transfer between SEP and ASP. Connection sections are setup when routing the Connect Request messages from SEP via SGP to ASP or the other way“. NOTE: The entity labelled “SEP or STP“ is just an SEP here s

46、ince it contains an SCCP User. Subsection 1.4.2 SCCP Protocol Class Support Protocol class 3 is not in the scope of the present document. Subsection 1.4.4 Interworking with SCCP Network Management Functions ANSI references do not apply. N-STATE is defined in ITU-T Recommendation Q.711 7, clause 6.3.

47、2.3.2, table 16/Q.711 N-PCSTATE is defined in ITU-T Recommendation Q.711 7, clause 6.3.2.3.3, table 17/Q.711. N-COORD is defined in ITU-T Recommendation Q.711 7, clause 6.3.2.3.1, table 15/Q.711 Subsection 1.4.5 Support for the management between the SGP and ASP. The SUA shall also provide intenvork

48、ing with SCCP management functions at the SG to inform concerned SCCP users in the SS N0.7 network about the availability, accessibility and congestion status of SUNSUA users in the managed IP network. Subsection 1.5 Internal Functions Provided in the SUA Layer Transaction ID shall not be used for R

49、outing Key Information. Dynamic registration shall not be used to provision Routing Key information. Subsection 1.5.1 Address Mapping at the SG Replace occurrences of “t (r)“by “T(r)“. If messages are discarded when there is no address match, a report shall be made to Layer Management. Subsection 1.5.3 Address Mapping Function at a Relay Node It is preferable to route messages to the SG on Global Title within the SS N0.7 network, rather than on SSN (+ PC), if the relay function is to be invoked at the SG (with the SG