ITU-T Q 765 1-1998 Signalling System No 7 - Application Transport Mechanism - Support of VPN Applications with PSS1 Information Flows (Study Group 11 56 pp)《No 7信令系统-应用传送机制-带PSS1信息.pdf

1、INTERNATIONAL TELECOMMUNICATION UNION ITU-T TELECOMMUNICATION STANDARDIZATION SECT0 R OF ITU Q.765.1 (05198) SERIES Q: SWITCHING AND SIGNALLING Specifications of Signalling System No. 7 - ISDN user part Signalling System No. 7 - Application transport mechanism - Support of VPN applications with PSSI

2、 information flows ITU-T Recommendation Q.765.1 (Previously CCITT Recommendation) STD-ITU-T RECMN Q=7bSaL-ENGL 3978 M 4862573 Ob55327 37T D ITU-T Q-SERIES RECOMMENDATIONS SWITCHING AND SIGNALLING SIGNALLING IN THE INTERNATIONAL MANUAL SERVICE INTERNATIONAL AUTOMATIC AND SEMI-AUTOMATIC WORKING CLAUSE

3、S APPLICABLE TO ITU-T STANDARD SYSTEMS SPECIFICATIONS OF SIGNALLING SYSTEMS No. 4 AND No. 5 SPECIFICATIONS OF SIGNALLING SYSTEM No. 6 SPECIFICATIONS OF SIGNALLING SYSTEM RI SPECIFICATIONS OF SIGNALLING SYSTEM R2 DIGITAL EXCHANGES INTERWORKING OF SIGNALLING SYSTEMS SPECIFICATIONS OF SIGNALLING SYSTEM

4、 No. 7 General Message transfer part (MTP) Signalling connection control part (SCCP) Telephone user part (TUP) ISDN supplementary services Data user part Signalling System No. 7 management Q.1-Q.3 Q.4-Q.59 Q. I OO-Q. 1 1 9 Q.120-Q.249 Q.250-Q . 309 Q.310-Q.399 Q.400-Q.499 Q.500-Q.599 Q.600-Q.699 Q.7

5、00-Q.849 Q.700 Q.701-Q.709 Q.711-Q.719 Q. 720-Q. 729 Q. 730-Q . 739 Q.740-Q.749 Q .750-Q .759 Q.760-Q.769 Transaction capabilities application part Test specification Q3 interface DIGITAL SUBSCRIBER SIGNALLING SYSTEM No. 1 PUBLIC LAND MOBILE NETWORK INTERWORKING WITH SATELLITE MOBILE SYSTEMS INTELLI

6、GENT NETWORK BROADBAND ISDN Q.770-Q.779 Q. 780-Q. 799 Q ,800-Q . 849 Q.850-Q.999 Q. 1000-Q. 1 O99 Q. I 1 OO-Q .I I 99 Q.1200-Q.1999 Q.2000-Q.2999 For further details, please refer to ITU-T List of Recommendations. STD-ITU-T RECMN Qa7b5-3-ENGL 3998 = 4862593 Ob55328 226 m ITU-T RECOMMENDATION 4.765.1

7、 SIGNALLING SYSTEM NO. 7 - APPLICATION TRANSPORT MECHANISM - SUPPORT OF VPN APPLICATIONS WITH PSSl INFORMATION FLOWS Summary This Recommendation describes the extensions for the support of the VPN applications over the public Network Node Interface (“I). This application makes use of the Application

8、 Transport Mechanism described in Recommendation Q.765 for bearer related signalling, and the Transaction Capability (TCAP) for signalling involving no bearer. This Recommendation specifies the respective users (i.e. APM-user, TC-user) to support the PSSl information flows continuity in VPN applicat

9、ions (Transparent transfer of PSS 1 information flows between PINX entities). The public NNI provides transparency to the services of the private network. Source ITU-T Recommendation Q.765.1 was prepared by ITU-T Study Group 11 (1997-2000) and was approved under the WTSC Resolution No. 1 procedure o

10、n the 1 5h of May 1998. Keywords APM, ASN.l, ISUP, PSS1, TCAP Recommendation Q.765.1 (05/98) 1 STDmITU-T RECMN Q-765-L-ENGL L79 = 4b2591 Ob55329 Lb2 m FOREWORD ITU (International Telecommunication Union) is the United Nations Specialized Agency in the field of telecommunications. The IT Telecommunic

11、ation Standardization Sector (ITU-T) is a permanent organ of the IT. The ITU-T is responsible for studying technical, operating and tariff questions and issuing Recommendations on them with a view to standardizing telecommunications on a worldwide basis. The World Telecommunication Standardization C

12、onference (WTSC), which meets every four years, establishes the topics for study by the ITU-T Study Groups which, in their turn, produce Recommendations on these topics. The approval of Recommendations by the Members of the ITU-T is covered by the procedure laid down in WTSC Resolution No. 1. In som

13、e areas of information technology which fall within IT-Ts purview, the necessary standards are prepared on a collaborative basis with IS0 and IEC. NOTE In this Recommendation, the expression “Administration“ is used for conciseness to indicate both a telecommunication administration and a recognized

14、 operating agency. INTELLECTUAL PROPERTY RIGHTS The ITU draws attention to the possibility that the practice or implementation of this Recommendation may involve the use of a claimed Intellectual Property Right. The ITU takes no position concerning the evidence, validity or applicability of claimed

15、Intellectual Property Rights, whether asserted by ITU members or others outside of the Recommendation development process. As of the date of approval of this Recommendation, the ITU had not received notice of intellectual property, protected by patents, which may be required to implement this Recomm

16、endation. However, implementors are cautioned that this may not represent the latest information and are therefore strongly urged to consult the TSB patent database. O ITU 1999 All rights reserved. No part of this publication may be reproducedor utilized in any form or by any means, electronic or me

17、chanical, including photocopying and microfilm, without permission in writing from the IT. 11 Recommendation Q.765.1 (05/98) STD-ITU-T RECMN Q.7b5.L-ENGL 1978 4862591 Ob5533ll 984 CONTENTS 1 2 3 4 5 6 6.1 6.2 7 7.1 7.2 7.3 8 8.1 8.2 8.3 9 9.1 Scope References Definitions Abbreviations . Recommendati

18、on structure . Modelling . Network model . Specification model 6.2.1 Introduction . 6.2.2 General model . 6.2.3 Dynamic primitive flows . 6.2.4 Basic call . 6.2.5 Transit PINX function - Generic functional protocol . 6.2.6 Gateway PINX function . Application Process functions General . VPN Applicati

19、on Process functions . Connection with call (bearer related) 7.2.1 Introduction . 7.2.2 Primitive interface (AP - ISUP SACF) . 7.2.3 Procedures . 7.2.4 Exceptional procedures . 7.2.5 Error indication primitive 7.2.6 Primitive contents . . . VPN Application Process functions - Connection without call

20、 (bearer unrelated) . 7.3.1 Introduction . 7.3.2 Primitive interface (AP - TC SACF) 7.3.3 Connection Qriented signalling procedures 7.3.4 Primitive contents . Single Association Control Function (SACF) . ISUP SACF Introduction Information flows related to messages sent by the node Information flows

21、related to messages received by the node . Single Association Control Function (SACF) . TC SACF Introduction Recommendation 4.765.1 (05/98) Page 1 2 3 3 5 6 6 8 8 8 12 15 15 15 16 16 17 17 19 19 25 25 25 27 27 27 27 28 29 29 30 30 31 31 . 111 STD-ITU-T RECMN Q-765.1-ENGL 1998 = 4862591 0655331 810 W

22、 9.2 9.3 10 10.1 10.2 10.3 11 11.1 11.2 11.3 11.4 11.5 11.6 11.7 11.8 12 12.1 13 13.1 13.2 13.3 13.4 14 14.1 14.2 iv Information flows related to operations sent by the node Information flows related to operations received by the node . PSSl ASE (PSSl ASE) Primitive interface Signalling procedures .

23、 10.2.1 Public Initiating Node . 10.2.2 Public Addressed Node . 10.2.3 Signalling congestion Primitive contents . Connection Oriented PSSl ASE (COPSSl ASE) TC-user sequence . Interface COPSS1 -ASE/SACF . Supported operations ASE procedures 1 1.4.1 Relationship between the COPSS 1 -ASE and TCAP 11.4.

24、2 Operations . 1 1.4.3 Expiry of timers . 1 1.4.4 Signalling congestion Primitive contents . Abstract syntax, general . Subsystem number ASN.l module TCAP (TC ASE) . Interface TCAP/SACF 12.1.1 Primitives 12.1.2 Use of TCAP SCCP Interface SCCP/SACF Use of SCCP . Routing in the SCCP network Number inf

25、ormation used for routing . VPNTransport - Formats and codes of application data Private network specific information elements to be transported within the Application Transport Parameter “I specific information to be transported in the Application Transport Parameter Recommendation 4.765.1 (05/98)

26、Page 31 32 32 32 32 32 33 33 33 34 34 35 36 36 37 37 39 39 39 39 40 40 43 43 43 43 43 43 44 44 44 44 45 45 Page 15 Timers . 46 47 15.1 Timers in TC-user . Recommendation Q.765.1 (05/98) V STD=ITU-T RECMN P-7bS.L-ENGL 1996 Support of GFP functionality at transit PINX nodes m 4b259L Ob55333 693 m Full

27、 support Recommendation Q.765.1 Support of GFP functionality at gateway PINX nodes (See 6.2.6) Continuation of calls with no application association SIGNALLING SYSTEM NO. 7 - APPLICATION TRANSPORT MECHANISM - SUPPORT OF VPN APPLICATIONS WITH PSS1 INFORMATION FLOWS (Geneva, 1998) Full support No supp

28、ort (Note I) Supported (Note 2) 1 Scope This Recommendation describes the extensions required for the support of VPN applications over the public Network Node Interface (“I). This application makes use of the Application Transport Mechanism described in Recommendation Q.765 for bearer related signal

29、ling, and the Transaction Capability (TCAP) for signalling involving no bearer. This Recommendation specifies the respective users (Le. APM-user, TC-user) to support the PSS1 information flows continuity in VPN applications (Transparent transfer of PSS 1 information flows between PINX entities). The

30、 public NNI provides transparency to the services of the private network. The private network functionality is defined by IS0 in its series of Standards for Private Integrated Services Network. In addition, the concept of a “Relay node“ is introduced by this Recommendation. This Recommendation suppo

31、rts a number of network options. These are summarized in Table 1. (See 6.2.6) Relocation of gateway function Table UQ.765.1- Network options Not supported (Note 3) Supported Option 1 Values I (See 6.2.6) Not supported (See 6.2.5) Not applicable in the international network (Note 1) Recommendation Q.

32、765.1 (05198) 1 STDmITU-T RECMN Q.7b5.1-ENGL 1998 m 48b2591 Ob55334 52T m 2 References The following ITU-T Recommendations and other references contain provisions which, through reference in this text, constitute provisions of this Recommendation. At the time of publication, the editions indicated w

33、ere valid. All Recommendations and other references are subject to revision; all users of this Recommendation are therefore encouraged to investigate the possibility of applying the most recent edition of the Recommendations and other references listed below. A list of the currently valid ITU-T Reco

34、mmendations is regularly published. ISOAEC 1 1574: 1994, Information technology - Telecommunications and information exchange between systems - Private Integrated Services Network - Circuit-mode 64 kbitls bearer services - Service description, Junctional model and information flows. ISOIEC 1 1572: 1

35、997, Information technology - Telecornmunications and information exchange between systems - Private Integrated Services Network - Circuit mode bearer services - Inter-exchange signalling procedures and protocol. ISOIEC 1 1582: 1995, Information technology - Telecommunications and information exchan

36、ge between systems - Private Integrated Services Network - Generic functional protocol for the support of supplementary services - Inter-exchange signalling procedures and protocol. ISOIEC 1 1579-1 : 1994, Information technology - Telecommunications and information exchange between systems - Private

37、 integrated services network - Part 1: Reference configuration for PISN Exchanges (PIN*. ISOIIEC 15055: 1997, Information technology - Telecommunications and information exchange between systems - Private Integrated Services Network - Specification, functional model and information jlows - Transit c

38、ounter additional network feature, ISOIIEC 15056: 1997, Information technology - Telecommunications and information exchange between systems - Private Integrated Services Network - Inter-exchange signalling protocol - Transit counter additional network feature. ITU-T Recommendation 4.7 1 1 (1 993),

39、Signalling System No. 7 - Functional description of the signalling connection control part. ITU-T Recommendation Q.712 (1 993), Signalling System No. 7 - Definition and function of SCCP messages. ITU-T Recommendation 4.7 13 (1 993), Signalling System No. 7 - SCCP formats and codes. ITU-T Recommendat

40、ion Q.714 (1993), Signalling System No. 7 - Signalling connection control part procedures. ITU-T Recommendation Q.7 15 (1 996), Signalling connection control part user guide. ITU-T Recommendation Q.7 16 (1 9931, Signalling System No. 7 - Signalling Connection Control Part (SCCP) performance. ITU-T R

41、ecommendation Q.763 (1997), Signalling System No. 7 - ISDN User Part formats and codes. ITU-T Recommendation 4.764 (1997), Signalling System No. 7 - ISDN User Part signalling procedures. CCITT Recommendation Q.767 (1991), Application of the ISDN user part of CCITT Signalling System No. 7 for interna

42、tional ISDN interconnection. ITU-T Recommendation Q.77 1 (1 993), Functional description of transaction capabilities. Recommendation Q.765.1 (0998) 171 181 191 20 21 ITU-T Recommendation 4.772 (1 993), Transaction capabilities information element definitions. ITU-T Recommendation Q.773 (1 993), Tran

43、saction capabilities formats and codes. ITU-T Recommendation Q.774 (1 993), Transaction capabilities procedures. ITU-T Recommendation Q.775 (1 993), Guidelines for using transaction capabilities. ITU-T Recommendation 4.93 1 (1 998), ISDN user-network interface layer 3 specijcation for basic call con

44、trol - Annex M: Additional basic call signalling requirements for the support of private network interconnection for virtual private network applications. ITU-T Recommendation 4.932 (1998), Digital Subscriber Signalling System No. I - Generic procedures for the control of ISDN supplementary services

45、 - Annex D: Enhancements for virtual private networks. ITU-T Recommendation Q.765 (1 998), Signalling Sstem No. 7 - Application transport mechanism. ITU-T Recommendation Q. 1400 (1 993), Architecture pamework for the development of signalling and OA this is referred to as the “Application Process“.

46、This Recommendation describes only the part of the total Application Process and Protocol functions in the exchange, that relates to NNI enhancements for the support of private network interconnection in VPN application. The protocol functions are subdivided into two areas: signalling associations w

47、ith a bearer (ISUP), and signalling associations without a bearer (Connection Oriented TC-user). For calls with a bearer, it describes the use of the services provided by the APM 23. For signalling requiring no bearer, it describes the services provided by TCAP. The signalling association with a bea

48、rer is subdivided into three parts: PSS1 Applications Protocol (PSS1 ASE), Application Transport Mechanism (APM ASE) and ISUP Basic Call (ISUP ASE) These are coordinated by the Single Association Coordination Function (SACF). The Connection Oriented signalling association without a bearer is subdivi

49、ded into two parts: Connection Oriented PSS1 (COPSSl ASE), and Transaction Capability (TC ASE). These are coordinated by the Single Association Coordination Function (SACF). The Application Process (AP) contains all Call Control functions; however, this Recommendation will only describe the enhancements required to support VPN applications. The Application Process relevant to private network functionality can be found in other Recommendations (reference i and reference 2), as can that for the public ISUP basic call 14. The service primitive technique, use