1、BRITISH STANDARD BS ISO/IEC 14699:1997 Information technology OpenSystems Interconnection Transport Fast Byte Protocol ICS 35.100.40BSISO/IEC14699:1997 This British Standard, having been prepared under the direction of the DISC Board, was published under the authority of the Standards Board and come
2、s into effect on 15 December 1997 BSI 05-1999 ISBN 0 580 28851 X National foreword This British Standard reproduces verbatim ISO/IEC14699:1997 and implements it as the UK national standard. The UK participation in its preparation was entrusted to Technical Committee IST/6, Data communications, which
3、 has the responsibility to: aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them
4、in the UK. A list of organizations represented on this committee can be obtained on request to its secretary. From 1 January 1997, all IEC publications have the number 60000 added to the old number. For instance, IEC27-1 has been renumbered as IEC60027-1. For a period of time during the change over
5、from one numbering system to the other, publications may contain identifiers from both systems. Cross-references The British Standards which implement international or European publications referred to in this document may be found in the BSI Standards Catalogue under the section entitled “Internati
6、onal Standards Correspondence Index”, or by using the “Find” facility of the BSI Standards Electronic Catalogue. 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 Brit
7、ish Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pagesi andii, theISO/IEC title page, pages ii to iv, pages 1 to 22 and a back cover. This standard has been updated (see copyright date) and may have
8、 had amendments incorporated. This will be indicated in the amendment table on the inside front cover. Amendments issued since publication Amd. No. Date CommentsBSISO/IEC14699:1997 BSI05-1999 i Contents Page National foreword Inside front cover Foreword iv Text of ISO/IEC 14699 1ii blankBSISO/IEC146
9、99:1997 ii BSI 05-1999 Contents Page Foreword iv Introduction 1 1 Scope 2 2 Normative references 2 2.1 Identical Recommendations|International Standards 2 2.2 Paired Recommendations|International Standards equivalent in technical contents 3 3 Definitions 3 4 Symbols and abbreviations 4 4.1 Data unit
10、s 5 4.2 TPDU types 5 4.3 TPDU fields 5 4.4 Miscellaneous 5 5 Overview of the Transport Fast Byte Protocol 5 5.1 Service provided by the Transport Layer 5 5.2 Service assumed from the Network 6 5.3 Functions of the Transport Layer 7 5.4 Modes of operation 8 5.5 Model of the Transport Layer 8 6 Transp
11、ort Fast Byte Protocol specification 9 6.1 Transport Protocol Data Unit (TPDU) transfer 9 6.2 Connection establishment 10 6.3 Connection refusal 11 6.4 Normal release 12 6.5 Error indication 12 6.6 Abnormal release 13 6.7 Data transfer 13 6.8 Segmenting and reassembling 13 6.9 Expedited data transfe
12、r 14 6.10 Invalid TPDU 14 7 FB-TPDU structure and encoding 14 7.1 Header part 15 7.2 Control part 16 7.3 Data part 16 8 Conformance 17 Annex A Protocol Implementation Conformance Statement (PICS) proforma 18 A.1 General 18 A.2 Identification 18 A.3 Indices used in this annex 19 A.4 Modes implemented
13、 19 A.5 Initiator/responder capability to establish connection 19 A.6 Supported functions 19 A.7 Supported TPDUs 20 A.8 Supported FB-TPDU fields and parameters 20 A.9 Negotiation and selection 20 A.10 Error handling 21 Annex B Fallback procedures for systems implementing ITU-T Rec. X.224|ISO/IEC8073
14、 in addition to the Transport Fast Byte Protocol 21 B.1 Scope 21BSISO/IEC14699:1997 BSI05-1999 iii Page B.2 Fallback procedures 21 Figure Intro. 1 Relationship between the Transport Fast Byte Protocol and adjacent services 2 Figure 1 Model of the transport layer 9 Table 1 Transport service primitive
15、s 6 Table 2 Connection-Oriented Network service primitives 6 Descriptors: Data processing, information interchange, telecommunications, network interconnection, open systems interconnection, transport layer, protocols.BSISO/IEC14699:1997 iv BSI 05-1999 Foreword ISO (the International Organization fo
16、r Standardization) and IEC (theInternational 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 org
17、anization 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 techno
18、logy, ISO and IEC have established a joint technical committee, ISO/IECJTC1. 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
19、a vote. International Standard ISO/IEC14699 was prepared by Joint Technical Committee ISO/IECJTC1, Information technology, Subcommittee SC6, Telecommunications and information exchange between systems, in collaboration with ITU-T. The identical text is published as ITU-T RecommendationX.634. Annex A
20、 forms an integral part of this International Standard. Annex B is for information only.BSISO/IEC14699:1997 BSI05-1999 1 Introduction This Recommendation|International Standard is one of a set of Recommendations|International Standards produced to facilitate the interconnection of information proces
21、sing systems. This set of Recommendations|International Standards covers the services and protocols required to achieve such interconnection. The Transport Fast Byte Protocol Recommendation|International Standard is positioned with respect to other related Recommendations|International Standards by
22、the layers defined in the Reference Model for Open Systems Interconnection (seeITU-TRec.X.200|ISO/IEC7498-1). It is most closely related to, and lies within the field of application of, the Transport Service definition (seeITU-TRec.X.214|ISO/IEC8072). It also uses and makes reference to the Network
23、Service definition (seeITU-TRec.X.213|ISO/IEC8348), whose provisions it assumes in order to accomplish Transport Fast Bytes aims. The interrelationship of these Recommendations|International Standards is illustrated inFigure Intro. 1 This Recommendation|International Standard specifies a common enco
24、ding and protocol procedures. It is intended that the Transport Fast Byte Protocol should be simple and cater for a specific range of Network Service qualities possible. The protocol is structured to give rise to two modes of operation which are designed to minimize possible incompatibilities and im
25、plementation costs. The modes are selectable with respect to the Transport and Network services in providing the required Quality of Service for the interconnection of two session entities (one mode ignores network signalled errors, the other mode does not). This Recommendation|International Standar
26、d does not define mechanisms that can be used to optimize network tariffs or enhance the quality of Network Service. The primary aim of this Recommendation|International Standard is to provide a set of rules for communication expressed in terms of the procedures to be carded out by peer entities at
27、the time of communication. These rules for communication are intended to provide a sound basis for development in order to serve a variety of purposes: a) as a guide for implementors and designers; b) for use in the testing and procurement of equipment; c) as part of an agreement for the admittance
28、of systems into the open systems environment; d) as a refinement of the understanding of OSI. As it is expected that the initial users of this Recommendation|International Standard will be designers and implementors of equipment, this Recommendation|International Standard contains, in notes or in an
29、nexes, guidance on the implementation of the procedures defined herein. This Recommendation|International Standard contains a clause on conformance of equipment claiming to implement the procedures in this Recommendation|International Standard (seeclause8). To evaluate conformance of a particular im
30、plementation, it is necessary to have a statement of which capabilities and options have been implemented for a given OSI protocol. Such a statement is called a Protocol Implementation Conformance Statement (PICS). A PICS proforma is provided inAnnex A. Attention is drawn to the fact that this Recom
31、mendation|International Standard does not contain any tests to demonstrate this conformance. It should be noted that it may not be possible with current technology to verify that an implementation will operate the protocol defined in this Recommendation|International Standard correctly under all cir
32、cumstances. It is possible by means of testing to establish confidence that an implementation correctly operates the protocol in a representative sample of circumstances. It is, however, intended that this Recommendation|International Standard can be used in circumstances where two implementations f
33、ail to communicate in order to determine whether one or both have failed to operate the protocol correctly.BSISO/IEC14699:1997 2 BSI05-1999 1 Scope This Recommendation|International Standard specifies: a) Two modes of procedures when operating over the connection oriented network service: 1) mode 0:
34、 acts on network signalled errors; 2) mode 4: ignores network signalled errors, for the connection oriented transfer of data and control information from one transport entity to a peer transport entity. b) The means of selecting the mode of procedures to be used by the transport entities. c) The str
35、ucture and encoding of the TPDUs used for the transfer of data and control information. The procedures are defined in terms of: a) the interactions between peer transport entities through the exchange of TPDUs; b) the interactions between a transport entity and the transport service user in the same
36、 system through the exchange of transport service primitives; c) the interactions between a transport entity and the network service provider through the exchange of network service primitives. These procedures are applicable to instances of communication between systems which support the Transport
37、Layer of the OSI Reference Model and wish to interconnect in the open systems environment using the Transport Fast Byte Protocol. This Recommendation|International Standard specifies, in clause8, conformance requirements for systems implementing these procedures and provides the PICS proforma in com
38、pliance with the relevant requirements, and in accordance with the relevant guidance, given in ITU-TRec.X.296 and ISO/IEC9646-7. It does not contain tests which can be used to demonstrate this conformance. 2 Normative references The following Recommendations and International Standards contain provi
39、sions 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 International Standards are subject to revision, and parties to agreements based on this Recommenda
40、tion|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 B
41、ureau of the ITU maintains a list of currently valid ITU-T Recommendations. 2.1 Identical Recommendations|International Standards ITU-T Recommendation X.200 (1994)|ISO/IEC7498-1:1994, Information technology Open Systems Interconnection Basic Reference Model: The Basic Model. ITU-T Recommendation X.2
42、10 (1993)|ISO/IEC10731:1994, Information technology Open Systems Interconnection Basic Reference Model: Conventions for the definition of OSI services. Figure Intro. 1 Relationship between the Transport Fast Byte Protocol and adjacent servicesBSISO/IEC14699:1997 BSI05-1999 3 ITU-T Recommendation X.2
43、13 (1995)|ISO/IEC8348:1996, Information technology Open Systems Interconnection Network service definition. ITU-T Recommendation X.214 (1995)|ISO/IEC8072:1996, Information technology Open Systems Interconnection Transport service definition. ITU-T Recommendation X.224 (1995)|ISO/IEC8073:1997, Inform
44、ation technology Open Systems Interconnection Protocol for providing the OSI connection-mode transport service. ITU-T Recommendation X.263 (1995)|ISO/IECTR9577:1996, Information technology Protocol identification in the Network layer. 2.2 Paired Recommendations|International Standards equivalent in
45、technical contents ITU-T Recommendation X.290 (1995), OSI conformance testing methodology and framework for protocol Recommendations for ITU-T applications General Concepts. ISO/IEC9646-1:1994, Information technology Open Systems Interconnection Conformance testing methodology and framework Part 1:
46、General concepts. ITU-T Recommendation X.296 (1995), OSI conformance testing methodology and framework for protocol Recommendations for ITU-T applications Implementation conformance statements. ISO/IEC 9646-7:1995, Information technology Open Systems Interconnection Conformance testing methodology a
47、nd framework Part 7: Implementation Conformance Statements. 3 Definitions NOTEThe definitions contained in this clause make use of abbreviations defined in clause4. 3.1 This Recommendation|International Standard is based on the concepts developed in ITU-T Rec. X.200|ISO/IEC7498-1 and makes use of th
48、e following terms defined in it: a) concatenation and separation; b) segmenting and reassembling; c) multiplexing and demultiplexing; d) splitting and recombining; e) flow control; f) nil selector value; g) connection-mode network service; h) connection-mode transport service. 3.2 For the purposes o
49、f this Recommendation|International Standard, the following definitions apply: 3.2.1 equipment hardware or software or a combination of both; it need not be physically distinct within a computer system 3.2.2 local matter a decision made by a system concerning its behaviour in the Transport Layer that is not subject to the requirements of this protocol 3.2.3 initiator a transport entity that acts on a T-CONNECT request from the TS-user 3.2.4 responder a transport entity with whom an initiator wishes to est
