1、ITU-T RECHN*X.ZZb 94 4862593 0594723 124 = INTERNATIONAL TELECOMMUNICATION UNION ITU-T TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU X.226 (07/94) DATA NETWORKS AND OPEN SYSTEM COM M UN I CATI ON S Open Systems Interconnection - Connection-mode Protocol specifications INFORMATION TECHNOLOGY - OPEN
2、 SYSTEMS INTERCONNECTION - CONNECTION-ORIENTED PRESENTATION PROTOCOL: PROTOCOL SPECIFICATION ITU-T Recommendation X.226 (Previously “CCITT Recommendation”) FOREWORD ITU (International Telecommunication Union) is the United Nations Specialized Agency in the field of telecommunications. The ITU Teleco
3、mmunication Standardization Sector (ITU-T) is a permanent organ of the ITU. Some 179 member countries, 84 telecom operating entities, 145 scientific and industrial organizations and 38 international organizations participate in ITU-T which is the body which sets world telecommunications standards (R
4、ecommendations). The approval of Recommendations by the Members of ITU-T is covered by the procedure laid down in WTSC Resolution No. 1 (Helsinki, i 993). In addition, the World Telecommunication Standardization Conference (WTSC), which meets every four years, approves Recommendations submitted to i
5、t and establishes the study programme for the following period. In some areas of information technology which fall within ITU-Ts purview, the necessary standards are prepared on a collaborative basis with IS0 and IEC. The text of ITU-T Recommendation X.226 was approved on ist of July 1994. The ident
6、ical text is also published as ISOAEC International Standard 8823- 1. NOTE In this Recommendation, the expression “Administration” is used for conciseness to indicate both a telecommunication administration and a recognized operating agency. O ITU 1994 All rights reserved. No part of this publicatio
7、n may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from the ITU. ITU-T RECMN*X=22b 94 4862591 0594725 TT7 m PUBLIC DATA NETWORKS Services and Facilities Interfaces ITU-T X-SERIES RECOMMENDATIONS D
8、ATA NETWORKS AND OPEN SYSTEM COMMUNICATIONS (FEBRUARY 1994) ORGANIZATION OF X-SERIES RECOMMENDATIONS X. 1-X. 19 X.20-X.49 Subject area Transmission, Signalling and Switching Network Aspects I Recommendation Series I X.50-X.89 X.90-X. 149 Administrative Arrangements OPEN SYSTEMS INTERCONNECTION X. 18
9、0-X. 199 I Maintenance Model and Notation Service Definitions Connection-mode Protocol Specifications Connectionless-mode Protocol Specifications PICS Proformas Protocol Identification Security Protocols Layer Managed Objects Conformance Testing INTERWORKING BETWEEN NETWORKS r: X 150-X.179 x.200-x.2
10、09 X.210-X.219 X.220-X.229 X.230-X.239 X.240-X.259 X.260-X.269 X.270-X.279 X.280-X.289 X.290-X.299 OPEN DISTRIBUTED PROCESSING x.900-x.999 I General I Mobile Data Transmission Svstems Management MESSAGE HANDLING SYSTEMS DIRECTORY OS1 NETWORKING AND SYSTEM ASPECT x.400-x.499 x.500-x.599 + I Networkin
11、g I x.mx.649 I I Naming, Addressing and Registration I X.650-X.679 I 1 Abstract Syntax Notation One (ASN. 1) I X.680-X.699 I OS1 MANAGEMENT SECURITY x.700-x.799 OS1 APPLICATIONS Commitment, Concurrency and Recovery - X.850-X.859 I Transaction Processing I X.860-X.879 1 - I Remote Operations I X.880-
12、X.899 I ITU-T Re. X.226 (1994 E) i ITU-T RECMN*X=226 94 9 4862.591 0594726 933 9 Contents Summary . Introduction . 1 Scope 2 Normative references . 2.1 Identical -T Recommendations I International Standards . 2.2 Paired ITU-T Recommendations I International Standards equivalent in technical content
13、. 2.3 Additional References . SECTION 1 - GENERAL 3 Definitions 3.1 Reference Model definitions . 3.2 Service conventions definitions 3.3 Naming and Addressing definitions 3.4 Presentation Service definitions 3.5 Presentation profocol definitions 4 Abbreviations . 4.1 Data Units . 4.2 Types of prese
14、ntation-protocol-data-units 4.3 Other abbreviations . Overview of the presentation protocol . 5.1 Service provided by the Presentation Layer . 5.2 Service assumed from the Session Layer 5.3 Functions of the Presentation Layer 5.4 Presentation functional units . 5.5 Model of the Presentation Layer .
15、SECTION 2 - PRESENTATION PROTOCOL SPECIFICATION 6 Elements of Procedure . 6.1 User data parameters . 6.2 Connection establishment . 6.3 Normal release of connection . 6.4 Abnormal release of connection . 6.5 Context alteration 6.6 Information transfer 6.7 Token handling . 6.8 Synchronization and res
16、ynchronization 6.9 Exception reporting . 6.10 Activity management 5 7 Mapping of PPDUs onto the session-service . 7.1 Connection establishment . 7.2 Normal release of connection . 7.3 Abnormal release of connection . 7.4 Context alteration 7.5 Information transfer 7.6 Token handling . 7.7 Synchroniz
17、ation 7.8 Resynchronization . 7.9 Exception reporting . 7.10 Activity management Page iv V 1 1 1 2 2 2 2 2 3 3 3 3 4 4 4 5 5 5 5 5 5 6 6 6 7 7 14 14 15 18 19 19 21 22 22 22 24 25 26 26 27 27 28 29 29 ii IW-T Rec . X.226 (1994 E) ITU-T RECMN*X=226 94 4862593 0594727 87T 8 Structure and encoding of PP
18、DUs 8.1 General 8.2 Structure of SS-user data parameter values 8.3 Encoding of SS-user data parameter values 8.4 Encoding of values of type User-data . 8.5 Rules of extensibility for normal mode . SECTION 3 - CONFORMANCE 9 Conformance 9.1 Dynamic Conformance . 9.2 Static Conformance . 9.3 Protocol i
19、mplementation conformance statement . 10 Precedence Annex A - State Tables A.l General A.2 Notation for state tables A.3 Conventions for entries in state tables A.4 Actions to be taken by the PPM AS Definition of sets and variables . A.6 Relationship to Session-service Annex B - Registration of Tran
20、sfer Syntaxes B.l Introduction . B.3 Form of registration of a transfer syntax . B.2 Registration Procedures Annex C - Corrections and enhancements incorporated in I“U-T Rec . X.226 I ISOhEC 8823-1 ITU-T RCC . X.226 (1994 E) Page 30 30 30 36 36 37 37 37 37 38 38 38 39 39 39 39 39 40 41 58 58 58 58 6
21、0 . 111 Summary This ITU-T Recommendation I International Standard specifies a protocol which is used to provide the codnection-mode presentation service (see Recommendation X. 21 6). iv ITU-T Rec. X.226 (1994 E) ITU-T RECMNUX-ZZb 94 m 4862591 0594729 b42 m Introduction This ITU-T Recommendation I I
22、nternational Standard is one of a set of Recommendations I International Standards produced to facilitate the interconnection of information processing systems. It is related to other Recommendations I International Standards in the set as defined by the Reference Model for Open Systems Interconnect
23、ion (ITU-T Rec. X.200 I ISOAEC 7498). The Reference Model subdivides the area of standardization for interconnection into a series of layers of specification, each of manageable size. This ITU-T Recommendation I International Standard specifies a common encoding and a number of functional units of p
24、resentation protocol procedures to be used to meet the needs of presentation-service-users. It is intended that the presentation protocol should be simple but general enough to cater for the total range of presentation-service-user needs without restricting future extensions. The primary aim of this
25、 ITU-T Recommendation I International Standard is to provide a set of rules for communication expressed in terms of the procedures to be carried out by peer entities at the time of communication. These rules for communication are intended to provide a sound basis for development in order to serve a
26、variety of purposes: a) b) c) d) as a guide for implementors and designers; for use in the testing and procurement of equipment; as part of an agreement for the admittance of systems into the open systems environment; as a refinement of the understanding of OSI. It is expected that the initial users
27、 of this ITU-T Recommendation I International Standard will be designers and implementors of equipment and therefore it contains, in notes or in annexes, guidance on the implementation of its procedures. It has not been possible as yet to prepare a product standard containing a set of objective test
28、s for conformance to this ITU-T Recommendation I International Standard, but it does contain a section on conformance of equipment claiming to implement the procedures it specifies. Attention is drawn to the fact that this ITU-T Recommendation I International Standard does not contain any tests to d
29、emonstrate this conformance and cannot, therefore, be considered as a complete product standard. The variations and options available within this ITU-T Recommendation I International Standard are essential to enable a presentation-service to be provided for a wide variety of applications. Thus, a mi
30、nimally conforming implementation will not be suitable for use in all possible circumstances. It is necessary, therefore, to qualify all references to this ITU-T Recommendation I International Standard with statements of the options provided or required, or with statements of the intended purpose of
31、 provision or use. ITU-T RC. X.226 (1994 E) V INFORMATION TECHNOLOGY - OPEN SYSTEMS INTERCONNECTION - CONNECTION-ORIENTED PRESENTATION PROTOCOL: PROTOCOL SPECIFICATION 1 1.1 Scope) This ITU-T Recommendation I International Standard specifies: a) b) c) procedures for the transfer of data and control
32、information from one presentation-entity to a peer presentation-entity ; the means of selecting, by means of functional units, the procedures to be used by the presentation- entities; the structure and encoding of the presentation-protocol-data-units used for the transfer of data and control informa
33、tion. The procedures are defined in terms of d) e) f) the interactions between peer presentation-entities through the exchange of presentation-protocol-data- units; the interactions between a presentation-entity and the presentation-service-user in the same system through the exchange of presentatio
34、n-service primitives; the interactions between a presentation-entity and the session-service-provider through the exchange of session-service primitives. 1.2 These procedures are defined in the main text of this ITU-T Recommendation I International Standard supplemented by state tables in Annex A. 1
35、.3 These procedures are applicable to instances of communication between systems which support the Presentation Layer of the OS1 Reference Model and which wish to interconnect in an OS1 environment. 1.4 This ITU-T Recommendation I International Standard also specifies conformance criteria for system
36、s implementing these procedures. It does not contain tests which can be used to demonstrate this conformance. 2 Normative references The following ITU-T Recomendations and International Standards contain provisions which, through reference in this text, constitute provisions of this ITU-T Recommenda
37、tion I 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 ITU-T Recommendation I International Standard are encouraged to investigate the possibility of appllying th
38、e most recent editions of the Standards and Recommendations listed below. Members of IEC and IS0 maintain registers of currently valid International Standards. The ITU-T Secretariat maintains a list of currently valid ITU-T Recommendations. 2.1 Identical ITU-T Recommendations I International Standar
39、ds - ITU-T Recommendation X.200 (1994) I ISOAEC 7498: 1994, Information technology - Open Systems Interconnection - Basic Reference Model: The basic model. *) The implementation and use of this Recommendation I International Standard for Open Systems Interconnection requires the public assignment of
40、 values of ASN. 1 type OBJECT IDENTIFIER to specifications of abstract syntaxes and transfer syntaxes. Public specification and naming of abstract syntaxes and transfer syntaxes can occur in IS0 standards or ITU-T Recommendations, or under the mechanisms identified in the Registration Authority proc
41、edures. A Registration procedures specification is given in Annex B. ITU-T Rec. X.226 (1994 E) 1 ITU-T RECMN*X-226 9Li 4862571 0594733 2TO ISO/IEC 8823-1 : 1994 (E) - ITU-T Recommendation X.215 (1994) i ISO/IEC 8326:1994, Information technology - Open Systems Interconnection - Session service defini
42、tion. IT-T Recommendation X.246 (1994) I ISO/IEC 8823-2:1994, Information technology - Open Systems Interconnection - Connection-oriented presentation protocol: Protocol implementation Conformance Statement (PICS) proforma. ITLJ-T Recommendation X.680 (1994) i ISOAEC 8824-1 : 1994, Information techn
43、ology -Abstract Syntax Notation One (ASN. 1): Specification of basic notation. ITU-T Recommendation X.690 (1994) i ISO/IEC 8825-1:1994, Information technology - ASN.1 encoding rules: Specification of Basic Encoding Rules (BER), Canonical Encoding Rules (CER) and Distinguished Encoding Rules (DER). I
44、TU-T Recommendation X.216 (1994) I ISO/IEC 8822:1994, Information technology - Open Systems Interconnection - Presentation service definition. ITU-T Recommendation X.660 (1992) i ISOAEC 9834-1:1993, Information technology - Open Systems Interconnection - Procedures for the operation of OSI registrat
45、ion authorities: General procedures. IT-T Recommendation X.2 1 O (1 993) I ISO/IEC 1073 1 : 1994. Information technology - Open Systems Interconnection - Basic Reference Model: Conventions for the definition of OS1 services. - - - - - - 2.2 Paired ITU-T Recommendations I International Standards equi
46、valent in technical content - ITU-T Recommendation X.208 (1992), Open Systems Interconnection - Specification of Abstract Syntax Notation One (ASN.1). ISO/IEC 8824: 1990, Information processing systems - Open Systems Interconnection - Specification of Abstract Syntax Notation One (ASN.1). ITU-T Reco
47、mmendation X.209 (1992), Open Systems Interconnection - Specification of Basic Encoding Rules for Abstract Syntax Notation One (ASN.1). ISO/IEC 8825: 1990. Information processing systems - Open Systems Interconnection - Specification of Basic Encoding Rules for Abstract Syntax Notation One (ASN.1).
48、CCITT Recommendation X.650 (1992), Open Systems Interconnection (OSI) - Reference Model for naming and addressing. IS0 7498-3: 1989, Information processing systems - Open Systems Interconnection - Basic Reference Model - Part 3: Naming and addressing. - - 2.3 Additional References CCITT Recommendati
49、on X.410 (1984), Message Handling Systems: Remote Operations and Reliable Transfer Server. SECTION 1 - GENERAL 3 Definitions 3.1 Reference Model definitions This ITU-T Recommendation I International Standard is based on the concepts developed in ITU-T Ref-. X.200 i ISO/IEC 7498 and makes use of the following terms derived from it: a) presentation-connection; b) Presentation Layer; c) presentation-protocol-data-unit; d) presentation-service; e) presentation-service-access-point; f) presentation-service-data-unit; g) presentation-protocol-control-information
