ISO IEC 17309-2000 Information technology - Telecommunications and information exchange between systems Private integrated Services Network - Mapping functions .pdf

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1、Reference number ISO/IEC 17309:2000(E) ISO/IEC 2000 INTERNATIONAL STANDARD ISO/IEC 17309 First edition 2000-09-15 Information technology Telecommunications and information exchange between systems Private Integrated Services Network Mapping functions for the employment of a circuit mode basic servic

2、e and the supplementary service user-to-user signalling as a pair of on-demand inter-PINX connections Technologies de linformation Tlcommunications et change dinformation entre systmes Rseau priv avec intgration de services Fonctions dapplication pour lemploi dun service de base en mode circuit et d

3、e la signalisation utilisateur/utilisateur du service supplmentaire en tant que paire de connexions entre PINX sur demandeISO/IEC 17309:2000(E) PDF disclaimer This PDF file may contain embedded typefaces. In accordance with Adobes licensing policy, this file may be printed or viewed but shall not be

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6、r bodies. In the unlikely event that a problem relating to it is found, please inform the Central Secretariat at the address given below. ISO/IEC 2000 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or

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8、w.iso.ch Printed in Switzerland ii ISO/IEC 2000 All rights reservedISO/IEC 17309:2000(E) ISO/IEC 2000 All rights reserved iii Contents Forewordiv Introduction v 1 Scope1 2 Conformance 1 3 Normative references .1 4 Definitions2 4.1 External definitions 2 4.2 Special definitions2 4.2.1 Calling PINX2 4

9、.2.2 Called PINX .2 4.2.3 Channel 2 4.2.4 Inter-PINX Connection 2 4.2.5 Inter-PINX Link .2 5 List of acronyms.2 6 Introduction 3 7 Capabilities at the Q reference point 3 8 Mapping functions3 8.1 Physical adaptation.4 8.1.1 ISDN primary rate user-network Layer 1 interface (1544 kbit/s) 4 8.1.2 ISDN

10、primary rate user-network Layer 1 interface (2048 kbit/s) 4 8.1.3 ISDN basic user-network Layer 1 interface .4 8.2 Mapping matrix5 8.2.1 Channel allocation5 8.2.2 Bearer conditioning for the D Q -channel 5 9 IPC control functions5 9.1 IPC establishment.5 9.2 IPC clearing6 10 IPL control functions6 1

11、0.1 Static pre-conditions for IPL establishment .6 10.2 IPL establishment.6 10.3 Transfer of inter-PINX signalling Layer 2 information6 10.4 Use of message segmentation.6 Annex A Implementation Conformance Statement (ICS) Proforma.7ISO/IEC 17309:2000(E) iv ISO/IEC 2000 All rights reserved Foreword I

12、SO (the International Organization for Standardization) and IEC (the International Electrotechnical Commission) form the specialized system for worldwide standardization. National bodies that are members of ISO or IEC participate in the development of International Standards through technical commit

13、tees established by the respective organization to deal with particular fields of technical activity. ISO and IEC technical committees collaborate in fields of mutual interest. Other international organizations, governmental and non-governmental, in liaison with ISO and IEC, also take part in the wo

14、rk. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 3. In the field of information technology, ISO and IEC have established a joint technical committee, ISO/IEC JTC 1. Draft International Standards adopted by the joint technical committee are ci

15、rculated to national bodies for voting. Publication as an International Standard requires approval by at least 75 % of the national bodies casting a vote. Attention is drawn to the possibility that some of the elements of this International Standard may be the subject of patent rights. ISO and IEC s

16、hall not be held responsible for identifying any or all such patent rights. International Standard ISO/IEC 17309 was prepared by ECMA (as ECMA-244) and was adopted, under a special “fast-track procedure”, by Joint Technical Committee ISO/IEC JTC 1, Information technology, in parallel with its approv

17、al by national bodies of ISO and IEC. Annex A forms a normative part of this International Standard.ISO/IEC 17309:2000(E) ISO/IEC 2000 All rights reserved v Introduction This International Standard is one of a series of standards defining mapping functions in exchanges of Private Integrated Services

18、 Networks required for the utilization of intervening network scenarios. The series uses the ISDN concepts as developed by ITU-T (formerly CCITT) and is also within the framework of standards for open systems interconnection as defined by ISO/IEC. This International Standard specifies mapping functi

19、ons for the type of scenarios where two PINXs are interconnected via on- demand connections via the public ISDN using the supplementary service User-to-User Signalling for carrying signalling information. This International Standard is based upon the practical experience of ECMA member companies and

20、 the results of their active and continuous participation in the work of ISO/IEC JTC 1, ITU-T, ETSI and other international and national standardization bodies. It represents a pragmatic and widely based consensus.INTERNATIONAL STANDARD ISO/IEC 17309:2000(E) ISO/IEC 2000 All rights reserved 1 Inform

21、ation technology - Telecommunications and information exchange between systems - Private Integrated Services Network - Mapping functions for the employment of a circuit mode basic service and the supplementary service user-to-user signalling as a pair of on-demand inter-PINX connections 1S c o p e T

22、his International Standard specifies the mapping functions for a pair of on-demand inter-PINX connections using a circuit mode basic service and the supplementary service User-to-User Signalling (service 3) of a public ISDN at the same time. In order to connect a Private Integrated Services Network

23、Exchange (PINX) to another PINX, mapping functions are required to adapt the specific interfaces at the C reference point to the application at the Q reference point. As such, mapping functions provide for physical adaptation to the interface at the C reference point. Mapping functions also provide

24、for the mapping of user channels and signalling information at the Q reference point to the appropriate channels or timeslots at the C reference point. The C and Q reference points are defined in ISO/IEC 11579-1. At the Q reference point the mappings provide a 64 kbit/s service for user channels and

25、 a packet mode service for the signalling channel. Bearer conditioning is outside the scope of this International Standard, except for providing the layer 2 for the signalling channel at the Q reference point. Scenario management is outside the scope of this International Standard. This Internationa

26、l Standard is applicable to PINXs which can be interconnected to form a Private Integrated Services Network (PISN) and which support signalling protocols at the Q reference point. 2 Conformance In order to conform to this International Standard, a PINX shall satisfy the requirements identified in th

27、e Implementation Conformance Statement (ICS) proforma in annex A. 3 Normative references The following normative documents contain provisions which, through reference in this text, constitute provisions of this International Standard. For dated references, subsequent amendments to, or revisions of,

28、any of these publications do not apply. However, parties to agreements based on this International Standard are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. For undated references, the latest edition of the normative docum

29、ent referred to applies. Members of ISO and IEC maintain registers of currently valid International Standards. ISO/IEC 11574:2000, Information technology Telecommunications and information exchange between systems Private Integrated Services Network Circuit-mode 64 kbit/s bearer services Service des

30、cription, functional capabilities and information flows. ISO/IEC 11579-1:1994, Information technology Telecommunications and information exchange between systems Private Integrated Services Network Part 1: Reference configuration for PISN exchanges (PINX). ITU-T Rec. I.112:1993, Vocabulary of terms

31、for ISDNs. IUT-T Rec. I.210:1993, Principles of telecommunication services supported by an ISDN and the means to describe them. ITU-T Rec. I.411:1993, ISDN user-network interfaces Reference configurations. ITU-T Rec. I.430:1995, Basic user-network interface Layer 1 specification. ITU-T Rec. I.431:19

32、93, Primary rate user-network interface Layer 1 specification. ITU-T Rec. Q.920:1993, Digital Subscriber Signalling System No. 1 (DSS1) ISDN user-network interface data link layer General aspects.ISO/IEC 17309:2000(E) 2 ISO/IEC 2000 All rights reserved ITU-T Rec. Q.920 Am. 1:2000, Amendment 1 to ITU

33、-T Recommendation Q.920. ITU-T Rec. Q.921:1997, ISDN user-network interface Data link layer specification. ITU-T Rec. Q.921 Am. 1:2000, Amendment 1 to ITU-T Recommendation Q.921. ITU-T Rec. Q.931:1998, ISDN user-network interface layer 3 specification for basic call control. ITU-T Rec. Q.957.1:1996,

34、 Stage 3 description for additional information transfer supplementary services using DSS 1: User- to-User Signalling (UUS). ETS 300 415:1994, Private Telecommunication Network (PTN); Terms and definitions. 4 Definitions 4.1 External definitions For the purposes of this International Standard, the f

35、ollowing definitions apply. Basic Service (CCITT Rec. I.210) Call, Basic Call (ISO/IEC 11582) Integrated Services Digital Network (CCITT Rec. I.112) Private Integrated Services Network (ISO/IEC 11579-1) Private Integrated Services Network Exchange (ISO/IEC 11579-1) Public ISDN (ETS 300 415) Signalli

36、ng (CCITT Rec. I.112) Supplementary Service (ISO/IEC 11582) 4.2 Special definitions 4.2.1 Calling PINX : The PINX which is at the originating interface of the public ISDN (IVN). 4.2.2 Called PINX : The PINX which is at the destination interface of the public ISDN (IVN). 4.2.3 Channel : A means of bi

37、-directional transmission of user or signalling information between two points. 4.2.3.1 D Q -Channel : A channel used to convey call control information between the Q reference points of two peer PINXs. 4.2.3.2 U Q -Channel : A channel used to convey user information between the Q reference points o

38、f two PINXs. 4.2.4 Inter-PINX Connection : A connection provided by an IVN between two C reference points used to transport inter- PINX information from the PISN control plane and/or the PISN user plane. 4.2.5 Inter-PINX Link : A link between the Q reference points of two PINXs, comprising the total

39、ity of signalling transfer and user information transfer means. 5 List of acronyms DSS1 Digital Subscriber Signalling System No. one ICS Implementation Conformance Statement IPC Inter-PINX Connection IPL Inter-PINX Link ISDN Integrated Services Digital Network IVN Intervening Network PISN Private In

40、tegrated Services Network PINX Private Integrated Services Network Exchange UUS3 User-to-User Signalling service 3ISO/IEC 17309:2000(E) ISO/IEC 2000 All rights reserved 3 6 Introduction The inter-PINX connection scenario using circuit mode basic services and the supplementary service User-to-User Si

41、gnalling service 3 as defined for public ISDNs is an on-demand connection scenario. This scenario creates an IPL from the connections established as a result of an ISDN call. The ISDN call is established by specifying the supplementary service UUS3. The signalling connection associated with the ISDN

42、 call in conjunction with the UUS3 information transfer capability is used to provide the inter-PINX signalling connection. The circuit mode ISDN connection is used to provide the inter-PINX user connection. This scenario also includes procedures for sequence control and end-to-end flow control. Con

43、nections of this scenario can be established and released at any time under the control of either PINX. In case of failure, the public ISDN may reject a call establishment request or release an already established call. In case of congestion, the sending PINX may inhibit temporarily the sending of U

44、SER INFORMATION signalling messages by means of an internal congestion mechanism. Subject to implementation in the public ISDN, this scenario provides for the use of: up to 2 pairs of signalling and user information connections per ISDN basic access; and, up to 23 (1544 kbit/s primary rate) or 30 (2

45、048 kbit/s primary rate) pairs of signalling and user information connections per ISDN primary rate access. Multiple pairs of IPCs may exist at one or at more interfaces of a PINX. Each pair of IPCs can convey just one IPL. In the case of multiple pairs of IPCs (at one or more interfaces of a PINX),

46、 i.e. several calls with UUS3 are established at the same time from one PINX to one or more other PINXs, there is no mapping coordination necessary. Provision of just one number for addressing a Called PINX is sufficient for establishment of any number of pairs of IPCs from a given Calling PINX. 7 C

47、apabilities at the Q reference point For each instance of the Q reference point: one signalling channel (D Q ) for carrying the inter-PINX Layer 3 signalling protocol, and one user channel (U Q ) are provided. Inter-PINX signalling information is not restricted to call control on this particular U Q

48、 -channel. For a U Q -channel the following bearer capability shall be provided: information transfer rate: 64 kbit/s; other attributes shall be the same as at the C reference point. NOTE - The provision of bearer conditioning can change these attributes. However, this is outside the scope of this I

49、nternational Standard. For a D Q -channel the following bearer capability shall be provided: Transfer mode: packet mode; Information transfer capability: unrestricted digital information; Information transfer rate: implementation-dependent; other attributes shall be the same as at the C reference point. The functions to map D Q and U Q channels to an inter-PINX connection (IPC) at the C reference point are described in clause 8. 8 Mapping functions The PINX mapping funct