1、STD-ITU-T RECMN X*S27 BIS-ENGL 2998 W 4862591 0661704 755 INTERNATIONAL TELECOMMUNICATION UNION KU-T TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU X.217 bis (O 9/98) SERIES X: DATA NETWORKS AND OPEN SYSTEM COMMUNICATIONS Open Systems interconnection - Service definitions Information technology - O
2、pen Systems Interconnection - Service definition for the Application Service Object Association Control Service Element ITU-T Recommendation X.217 bis (Previously CCITT Recommendation) STDaITU-T RECMN X-217 BIS-ENGL 3998 U 4862593 Obb3705 691 ITU-T X-SERIES RECOMMENDATIONS DATA NETWORKS AND OPEN SYS
3、TEM COMMUNICATIONS PUBLIC DATA NETWORKS Services and facilities X. l-X. 19 Interfaces X.20-X.49 Transmission, signalling and switching X.50-X.89 Network aspects X.90-X.149 Maintenance X. 150-X. 179 Administrative arrangements X. 180-X. 199 OPEN SYSTEMS INTERCONNECTION Model and notation X.200-X.209
4、Connection-mode protocol specifications X.220-X.229 Connectionless-mode protocol specifications X.230-X.239 PICS proformas X.240-X.259 Protocol Identification X.260-X.269 Security Protocols X.270-X.279 Layer Managed Objects X.280-X.289 Conformance testing X.290-X.299 INTERWORKING BETWEEN NETWORKS Ge
5、neral X.300-X.349 Satellite data transmission systems X.350-X.399 MESSAGE HANDLING SYSTEMS X.400-X.499 DIRECTORY x.500-x.599 OS1 NETWORKING AND SYSTEM ASPECTS Networking X.6OeX.629 Efficiency X.630-X.639 Quality of service X .640-X. 649 Naming, Addressing and Registration X.650-X.679 Abstract Syntax
6、 Notation One (ASN. 1) X.680-X.699 OS1 MANAGEMENT Systems Management framework and architecture X.700-X.709 Management Communication Service and Protocol Structure of Management Information X.710-X.719 X.720-X.729 X.730-X.799 - Management functions and ODMA functions SECURITY X. 800-X. 849 OS1 APPLI
7、CATIONS Commitment, Concurrency and Recovery X.850-X.859 Transaction processing X.860-X.879 Remote operations X.880-X.899 OPEN DISTRIBUTED PROCESSING x.900-x.999 - For further details, please refer to ITU-T List of Recommendations. INTERNATIONAL STANDARD 15953 ITU-T RECOMMENDATION X.217 bis INFORMAT
8、ION TECHNOLOGY - OPEN SYSTEMS INTERCONNECTION - SERVICE DEFINITION FOR THE APPLICATION SERVICE OBJECT ASSOCIATION CONTROL SERVICE ELEMENT Summary This Service definition defines services provided by the application-service-element for ASO-association control: the Association Control Service Element
9、(ACSE). The ACSE provides basic facilities for the control of an ASO-association among communicating application-service-objects (ASOS). Source The ITU-T Recommendation X.217 bis was approved on the 25th of September 1998. The identical text is also published as ISOAEC International Standard 15953.
10、ITU-T Rec. X.217 bis (1998 E) i - STDaITU-T RECMN X.237 BIS-ENGL 3998 1111 4862593 0663707 4h4 FOREWORD ITU (International Telecommunication Union) is the United Nations Specialized Agency in the field of telecommuni- cations. The ITU Telecommunication Standardization Sector (IT-T) is a permanent or
11、gan of the ITU. 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 Conference (WTSC), which meets every four years, estab
12、lishes 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 some areas of information technology which fall within I
13、TU-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 operating agency. INTELLECTUAL PROPERTY RIGHTS The
14、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 Intellectual Property Rights, whether asserted by IT
15、U 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 Recommendation. However, impleentors are cautioned that th
16、is 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 reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, with
17、out permission in writing from the ITU. 11 ITU-T Rec. X.217 bis (1998 E) CONTENTS Scope Normative references 2.1 Identical Recommendations I International Standards . 2.2 Paired Recommendations I International Standards equivalent in technical content . Definitions 3.1 Reference model definitions 3.
18、1.1 Basic Reference Model definitions . 3.1.2 Security architecture definitions 3.1.3 Naming and addressing definitions . 3.2 Service conventions definitions . 3.3 Presentation service definitions . 3.4 Application Layer Structure definitions 3.5 ACSE service definitions Abbreviations . Conventions
19、Basic concepts 6.1 General 6.2 Authentication . 6.2.2 ACSE authentication facilities Service overview 7.1 Connection-mode 7.1.1 ACSE services . 7.1.2 Functional units . 7.2 Connectionless-mode 7.2.1 Functional units . Service definition 6.2.1 Authentication concepts 8.1 8.2 8.3 8.4 8.5 8.6 8.7 A-ASS
20、OCIATE service 8.1.1 A-ASSOCIATE parameters 8.1.2 A-ASSOCIATE service procedure . A-RELEASE service . 8.2.1 A-RELEASE parameters . 8.2.2 A-RELEASE service procedure A-ABORT service . 8.3.1 8.3.2 A-ABORT service procedure A-P-ABORT service . 8.4.1 A-P-ABORT parameter . 8.4.2 A-P-ABORT service procedu
21、re A-DATA Service . 8.5.1 A-DATA parameters . 8.5.2 A-DATA procedure . 8.6.1 A-ALTER-CONTEXT parameters . 8.6.2 A-ALTER-CONTEXT procedure . A-UNIT-DATA service 8.7.1 A-UNIT-DATA parameters 8.7.2 A-UNIT-DATA procedure A-ABORT parameters _1 . A-ALTER-CONTEXT ITU-T Rec . X.217 bis (1998 E) Page 1 1 1 2
22、 3 3 3 3 3 3 4 4 4 5 6 6 6 7 7 7 8 8 8 8 10 10 11 11 11 16 16 17 17 18 18 19 19 19 19 19 19 20 20 20 20 21 21 23 . 111 STD-ITU-T RECMM X-217 BIS-ENGL 1998 4862593 Obb1709 237 5 9 Sequencing information 9.1 9.2 9.3 9.4 9.5 9.6 9.7 A-ASSOCIATE . I 9.1.1 Type of service 9.1.2 Usage restrictions 9.1.4 D
23、isrupting service procedures . 9.1.3 Disrupted service procedures 9.1.5 Collisions . A-RELEASE . 9.2.1 Type of service 9.2.2 Usage restrictions 9.2.3 Disrupted service procedures 9.2.4 Disrupting service procedures . 9.2.5 Collisions . A-ABORT . 9.3.1 Type of service 9.3.2 Usage restrictions 9.3.3 D
24、isrupted service procedures 9.3.4 Disrupting service procedures . 9.3.6 Further sequencing information Collisions . 9.3.5 A-P-ABORT 9.4.1 Type of service 9.4.2 Usage restrictions 9.4.3 Disrupted service procedures 9.4.4 Disrupting service procedures . 9.5.1 Type of service 9.5.4 Disrupting services
25、A-DATA . 9.5.2 Usage restrictions 9.5.3 Disrupted services . 9.5.5 Collisions . A-ALTER CONTEXT 9.6.2 Usage restrictions 9.6.4 Disrupting services 9.6.5 Collisions . 9.6.1 Type of service 9.6.3 Disrupted services . A-UNIT-DATA . 9.7.1 Type of service 9.7.3 Disrupted services . 9.7.4 Disrupting servi
26、ces 9.7.2 Usage restrictions 9.7.5 Collisions . - ITU-T Rec . X.217 bis (1998 E) Page 23 23 23 23 23 23 23 23 23 23 23 23 24 24 24 24 24 24 24 24 24 24 24 24 24 24 24 24 24 25 25 25 25 25 25 25 25 25 25 25 25 25 25 STD-ITU-T RECMN X.217 BIS-ENGL 1798 m 4862593 Obb171O T59 II Introduction This Recomm
27、endation I International 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 IT-T Recommendations I International Standards in the set as defined by the Reference Model for Open Sys
28、tems Interconnection (see ITU-T Rec. X.200 I ISO/IEC 7498-1). The reference model subdivides the areas of standardization for interconnection into a senes of layers of specification, each of manageable size. The goal of Open Systems Interconnection is to allow, with a minimum of technical agreement
29、outside the Interconnection standards, the interconnection of information processing systems: - from different manufacturers; - under different managements; - - of different technologies. of different levels of complexity; and This Recommendation I Intemational Standard recognizes that application-p
30、rocesses may wish to communicate with each other for a wide variety of reasons. However, any communication will require the performance of certain services independent of the reasons for communication. The application-service-element defined herein provides such services. This Service definition def
31、ines services provided by the application-service-element for ASO-association control: the Association Control Service Element (ACSE). The ACSE provides basic facilities for the control of an ASO-association among communicating application-service-objects (ASOS). The ACSE includes four optional func
32、tional units. One functional unit provides additional facilities for exchanging information in support of authentication during association establishment without adding services. The optional ASO-context negotiation functional unit allows multiple ASO-contexts to be offered during association establ
33、ishment. The optional higher level association functional unit provides for the facility to identify ASO-associations and transparently pass data to child ASOS and allows the ASO-context or the presentation context on an ASO-association to be modified during the lifetime of the association. The opti
34、onal nested-association functional unit provides for the facility to instantiate multiple associations nested over supporting upper layers. The X.410 compatibility mode is not provided by this Service definition, since the optional functional units defined in this Recommendation I International Stan
35、dard are not used in this mode. The service definition herein is backwards compatible with ITU-T Rec. X.217 i ISOAEC 8649. The fast-associate mechanism allows a session connection, including its embedded presentation connection and application association, to be established using a compressed form o
36、f the information that would otherwise be sent on the S-CONNECT exchange. The compressed form, called the upper layer context identifier, is a reference to an upper-layer context specification, which is a definition of the fields of the application, ACSE, presentation and session protocols that woul
37、d be sent on the full-form connect messages. The upper layer context identifier may be parameterized to include values for the variable fields allowed by the full form protocols for the upper layers. Within the ACSE service, the only addition is the presence of a conceptual parameter which summarize
38、s the contents of the User-information of the A-ASSOCIATE primitives. It is recognized that, with respect to ACSE Quality of services (QoS), described in clause 8, work is still in progress to provide an integrated treatment of QoS across all layers of the OS1 Reference Model, and to ensure that the
39、 individual treatments in each layer service satisfy overall QoS objectives in a consistent manner. As a consequence, an addendum may be added to this Service definition at a later time which reflects further QoS developments and integration. c ITU-T Rec. X.217 bis (1998 E) V _ - STD-ITU-T RECMN X-Z
40、L7 BIS-ENGL 1998 6 48b2591 ObbL711 995 m ISOKEC 15953 : 1999 (E) INTERNATIONAL STANDARD ITU-T RECOMMENDATION INFORMATION TECHNOLOGY - OPEN SYSTEMS INTERCONNECTION - SERVICE DEFINITION FOR THE APPLICATION SERVICE OBJECT ASSOCIATION CONTROL SERVICE ELEMENT 1 Scope This Recommendation I International S
41、tandard defines ACSE services for ASO-association control in an open systems interconnection environment. ACSE supports two modes of communication service: connection-mode and connectionless-mode. The ACSE connection-mode service is provided by the use of the connection-mode ACSE protocol (see ITU-T
42、 Rec. X.227 bis I ISOAEC 15954). The ACSE connectionless-mode service (A-UNIT-DATA) is provided by the use of the connectionless-mode ACSE protocol (see ITU-T Rec. X.237 bis I ISO/IEC 15955). Five functional units are defined in the ACSE. The mandatory Kernel functional unit is used to establish and
43、 release ASO-associations. The optional Authentication functional unit provides additional facilities for exchanging information in support of authentication during association establishment without adding services. The ACSE authentication facilities may be used to support a limited class of authent
44、ication methods. The optional ASO-context negotiation functional unit allows multiple ASO-contexts to be offered during association establishment. The optional higher level association functional unit provides for the facility to identify ASO-associations and transparently pass data to child ASOS an
45、d allows the ASO-context or the presentation context on an ASO-association to be modified during the lifetime of the association. This Recommendation I International Standard does not specify individual implementations or products, nor does it constrain the implementation of entities and interfaces
46、within a computer system. No requirement is made for conformance to this Service definition. 2 Normative references The following Recommendations and International Standards contain provisions which, through reference in this text, constitute provisions of this Recommendation I International Standar
47、d. At this time of publication, the editions indicated were valid. All Recommendations and Standards are subject to revision, and parties to agreements based on this Recommendation I International Standard are encouraged to investigate the possibility-of applying the most recent edition of the Recom
48、mendations and Standards listed below. Members of IEC and IS0 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 I International Standards - IT
49、U-T Recommendation X.200 (1994) I ISOiEC 7498-1:1994, Information technology - Open Systems Interconnection - Basic Reference Model: The Basic Model. ITU-T Recommendation X.207 (1993) I ISOAEC 9545: 1994, Information technology - Open Systems Interconnection - Application layer structure. ITU-T Recommendation X.210 (1993) I ISOAEC 1073 1:1994, Information technology - Open Systems Interconnection - Basic Reference Model: Conventions for the definition of OSI services. - - ITU-T Rec. X.217 bis (1998 E) 1 STD*ITU-T RECMN X-237 BIS-ENGL 3498 II 4862543 0663732 821 II I
