BS-EN-ISO-IEC-8072-1996.pdf

BRITISH STANDARD BS EN ISO/IEC 8072: 1996 Incorporating Amendment No. 1 BS ISO/IEC 8072: 1994 renumbered Implementation of EN ISO/IEC 8072:1996 Information technology Open Systems Interconnection Transport service definition The European Standard EN ISO/IEC 8072:1995 has the status of a British Standard ICS 35.100.40 Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 19 12:53:10 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN ISO/IEC 8072:1996 This British Standard, having been prepared under the direction of the Information Systems Technology Standards Policy Committee was published under the authority of the Standards Board and comes into effect on 15 February 1995 © BSI 08-1999 The following BSI references relate to the work on this standard: Committee reference IST/6 Draft for comment 92/68384 DC ISBN 0 580 23701 X Committees responsible for this British Standard The preparation of this British Standard was entrusted by the Information Systems Technology Standards Policy Committee (IST/-) to Technical Committee IST/6, upon which the following bodies were represented: British Computer Society British Telecommunications plc CCTA (The Government Centre for Information Systems) Digital Equipment Co. Ltd. IBM United Kingdom Ltd. Information Systems Committee of the Universities Funding Council Institution of Electrical Engineers International Computers Limited Logica UK Ltd. Ministry of Defence Rank Xerox Ltd. Swift Project Consortium Amendments issued since publication Amd. No.DateComments 9091June 1996Indicated by a sideline in the margin Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 19 12:53:10 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN ISO/IEC 8072:1996 © BSI 08-1999i Contents Page Committees responsibleInside front cover National forewordii Foreword2 Forewordiv Text of ISO/IEC 80721 Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 19 12:53:10 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN ISO/IEC 8072:1996 ii © BSI 08-1999 National foreword This British Standard has been prepared by Technical Committee IST/6 and is the English language version of EN ISO/IEC 8072:1995, Information technology Open Systems Interconnection Transport service definition, published by the European Committee for Standardization (CEN). It is identical with ISO/IEC 8072:1994 published jointly by the International Organization for Standardization (ISO) and the International Electrotechnical Commission (IEC). BS EN ISO/IEC 8072:1996 supersedes BS 7218:1990, which is withdrawn. This British Standard is published under the direction of the Information Systems Technology Standards Policy Committee whose Technical Committee IST/6 has the responsibility to: aid enquirers to understand the text; present to the responsible international committee any enquiries on interpretation, or proposals for change, and keep UK interests informed; monitor related international and European developments and promulgate them in the UK. NOTEInternational and European Standards, as well as overseas standards, are available from Customer Services, BSI, 389 Chiswick High Road, London W4 4AL. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, the EN ISO/IEC title page, page 2, the ISO/IEC title page, pages ii to iv, pages 1 to 24 and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover. Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 19 12:53:10 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM EN ISO/IEC 8072 October 1995 ICS 35.100.40 Descriptors: See ISO document English version Information technology Open Systems Interconnection Transport service definition (ISO/IEC 8072:1994) Technologies de linformation Interconnexion de systèmes ouverts (OSI) Définition du service de transport (ISO/IEC 8072:1994) This European Standard was approved by CEN on 1995-08-31. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the Central Secretariat or to any CEN member. This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. CEN European Committee for Standardization Comité Européen de Normalisation Europäisches Komitee für Normung Central Secretariat: rue de Stassart 36, B-1050 Brussels © 1995 All rights of reproduction and communication in any form and by any means reserved in all countries to CEN and its members Ref. No. EN ISO/IEC 8072:1995 E Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 19 12:53:10 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN ISO/IEC 8072:1995 © BSI 08-1999 2 Foreword This European Standard has been taken over by CEN Technical Board from the work of ISO/IEC/JTC 1 “Information Technology” of the International Organization for Standardization (ISO) and the International Electrotechnical Commission (IEC). This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by April 1996, and conflicting national standards shall be withdrawn at the latest by April 1996. According to CEN/CENELEC Internal Regulations, the following countries are bound to implement this European Standard: Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 19 12:53:10 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 19 12:53:10 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ISO/IEC 8072:1994(E) ii © BSI 08-1999 Contents Page Forewordiv Introduction1 Section 1. General 1Scope1 2Normative references2 3Definitions2 4Abbreviations3 5Conventions3 6Overview and general characteristics4 7Classes and types of Transport Service4 Section 2. Definition of the connection-mode service 8Features of the connection-mode Transport Service4 9Model of the connection-mode Transport Service5 10Quality of connection-mode Transport Service7 11Sequence of Transport Service primitives10 12Transport Connection establishment phase14 13Data transfer phase16 14Transport Connection release phase18 Section 3. Definition of the connectionless-mode service 15Features of the connectionless-mode Transport Service21 16Model of the connectionless-mode Transport Service21 17Quality of connectionless-mode Transport Service22 18Sequence of connectionless-mode primitives at one TSAP23 19Data transfer23 Figure Intro.1 Relationship of the Transport Service to OSI transport and Session Protocols1 Figure 1 Abstract model of a Transport Connection5 Figure 2 Components of residual error rate9 Figure 3 Summary of Transport Service primitive time sequence diagrams12 Figure 4 State transition diagram for possible allowed sequence of TS primitives at a TC endpoint14 Figure 5 Sequence of primitives in successful TC establishment16 Figure 6 Sequence of primitives in data transfer17 Figure 7 Sequence of primitives in expedited data transfer18 Figure 8 Sequence of primitives in TS user invoked release19 Figure 9 Sequence of primitives in simultaneous TS users invoked release19 Figure 10 Sequence of primitives in a TS provider invoked release19 Figure 11 Sequence of primitives in a simultaneous TS user and TS provider invoked release20 Figure 12 Sequence of primitives in a TS user rejection of a TC establishment attempt20 Figure 13 Sequence of primitives in a TS provider rejection of a TC establishment attempt20 Figure 14 Model for a connectionless-mode transmission21 Figure 15 State transition diagram for sequences of connectionless-mode primitives at one TSAP23 Figure 16 Sequence of primitives in connectionless-mode data transfer24 Table 1 Precedence table7 Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 19 12:53:10 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ISO/IEC 8072:1994(E) © BSI 08-1999iii Page Table 2 Classification of performance QOS parameters8 Table 3 Transport Service primitives11 Table 4 Sequences of TS primitives at one end of a TC13 Table 5 TC establishment primitives and parameters15 Table 6 Data transfer primitives and parameters17 Table 7 Expedited TS primitives and parameters17 Table 8 TC release primitives and parameters18 Table 9 Transport connectionless-mode transmission service primitives and parameters23 Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 19 12:53:10 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ISO/IEC 8072:1994(E) iv © BSI 08-1999 Foreword ISO (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 committees 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 work. 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 circulated to national bodies for voting. Publication as an International Standard requires approval by at least 75 % of the national bodies casting a vote. International Standard ISO/IEC 8072 was prepared by Joint Technical Committee ISO/IEC JTC 1, Information technology, Subcommittee SC 6, Telecommunications and information exchange between systems, in collaboration with ITU-T. The identical text is published as ITU-T Recommendation X.214. This second edition cancels and replaces the first edition (ISO 8072:1986), which has been technically revised and consolidates Addendum 1:1986 and Technical Corrigendum 1:1991. Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 19 12:53:10 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ISO/IEC 8072:1994(E) © BSI 08-19991 Introduction This Recommendation|International Standard is one of a set of Recommendations|International Standards produced to facilitate the interconnection of computer systems. It is related to other Recommendations|International Standards in the set as defined by the Reference Model of Open Systems Interconnection (OSI). The OSI Reference Model (CCITT Rec. X.200|ISO 7498) subdivides the area of standardization for interconnection into a series of layers of specification, each of manageable size. This Recommendation|International Standard defines the Service provided by the Transport Layer to the Session Layer at the boundary between the Transport and Session Layers of the Reference Model. It provides for the designers of Session Protocols a definition of the Transport Service existing to support the Session Protocol and for designers of Transport Protocols a definition of the services to be made available through the action of the Transport Protocol over the underlying service. This relationship is illustrated in Figure Intro.1. Throughout the set of OSI Recommendations|International Standards, the term “Service” refers to the abstract capability provided by one layer of the OSI Reference Model to the layer above it. Thus, the Transport Service defined in this Recommendation|International Standard is a conceptual architectural Service, independent of administrative divisions. NOTEIt is important to distinguish the specialized use of the term “Service” within the set of OSI Recommendations|International Standards from its use elsewhere to describe the provision of a service by an organisation (such as the provision of a service, as defined in other Recommendations, by an Administration). Section 1. General 1 Scope This Recommendation|International Standard defines in an abstract way the externally visible service provided by the OSI Transport Layer in terms of: a) the primitive actions and events of the service; b) the parameter data associated with each primitive action and event; c) the relationship between, and the valid sequences of, these actions and events. The service defined in this Recommendation|International Standard is that which is provided by all OSI Transport Protocols (in conjunction with the Network Service) and which may be used by any OSI Session Protocol. This Recommendation|International Standard does not specify individual implementations or products, nor does it constrain the implementation of entities and interfaces within a system. Conformance of equipment to this Recommendation|International Standard is achieved by conformance to the protocols specified to fulfil the Transport Service defined in this Recommendation|International Standard. Figure Intro.1 Relationship of the Transport Service to OSI transport and Session Protocols Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 19 12:53:10 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ISO/IEC 8072:1994(E) 2 © BSI 08-1999 2 Normative references The following Recommendations and International Standards contain provisions which, through reference in this text, constitute provisions of this Recommendation|International Standard. At the time of publication, the editions indicated were valid. All Recommendations and Standards are subject to revision and parties to agreements based on this Recommendation|International Standard are encouraged to investigate the possibility of applying the most recent edition of the Recommendations and International Standards listed below. Members of IEC and ISO maintain registers of currently valid International Standards. The Telecommunication Standardization Bureau of the ITU maintains a list of currently valid ITU-T Recommendations. 2.1 Identical Recommendations|International Standards ITU-T Recommendation X.210 (1993)|ISO/IEC 10731:1993, Informatio