1、1 NTERNATIONAL TELECOMM U N CATION UN ION ITU-T TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU DATA NETWORKS AND OPEN SYSTEM COMMUNICATIONS OPEN SYSTEMS INTERCONNECTION - SERVICE DEFINITIONS X.217 (04195) INFORMATION TECHNOLOGY - OPEN SYSTEMS INTERCONNECTION - SERVICE DEFINITION FOR THE ASSOCIATION
2、 CONTROL SERVICE ELEMENT ITU-T Recommendation X.217 (Previously “CCIlT Recornmendation”) ITU-T RECNN*X=ZL? 95 9 4862.591 0632807 733 9 FOREWORD ITU (International Telecommunication Union) is the United Nations Specialized Agency in the field of telecommunications. The Telecommunication Standardizati
3、on 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 (Recommendations). The appr
4、oval of Recommendations by the Members of ITU-T is covered by the procedure laid down in WTSC Resolution No. 1 (Helsinki, 1993). In addition, the World Telecommunication Standardization Conference (WTSC), which meets every four years, approves Recommendations submitted to it and establishes the stud
5、y 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.217 was approved on the 10th of April 1995. The identical text is also pu
6、blished as ISO/IEC International Standard 8649. / NOTE In this Recommendation, the expression “Administration” is used for conciseness to indicate both a telecommunication administration and a recognized operating agency. O ITU 1996 All rights reserved. No part of this publication may be reproduced
7、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 RECNN*X*217 95 m Y862593 Ob32808 678 m ITU-T X-SERIES RECOMMENDATIONS DATA NETWORKS AND OPEN SYSTEM COMMUNICATIONS (February 1994) ORGANIZATION O
8、F X-SERIES RECOMMENDATIONS ITU-T RECNN*X-217 95 48b25%1 Ob12809 504 1 2 3 4 5 6 7 8 9 CONTENTS Scope Nonnative references . 2.1 Identical Recommendations I International Standards 2.2 2.3 Additional references Definitions 3.1 Reference model definitions . 3.1.1 Basic Reference Model definitions . 3.
9、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 Sructure definitions 3.5 ACSE service definitions Abbreviations . Conventions Basic concepts 6.1 General 6.2 Authentication
10、 . 6.2.1 Authentication concepts 6.2.2 ACSE authentication facilities Service overview 7.1 Connection-oriented mode 7.1.1 ACSE services 7.1.2 Functional units . 7.2 Connectionless mode Relationship with other ASES and lower layer services . 8.1 Other application-service-elements . 8.2 Presentation-s
11、ervice 8.2.1 Connection-oriented mode 8.2.2 Connectionless mode 8.3 Session-service 8.3.1 Connection-oriented mode 8.3.2 Connectionless mode Service definition . Paired Recommendations I International Standards equivalent in technical content 9.1 9.2 9.3 9.4 A-ASSOCIATE service 9.1 . 1 A-ASSOCIATE p
12、arameters 9.1.2 A-ASSOCIATE service procedure . A-RELEASE service 9.2.1 A-RELEASE parameters 9.2.2 A-RELEASE service procedure A-ABORT service 9.3.1 A-ABORT parameters 9.3.2 A-ABORT service procedure A-P-ABORT service . 9.4.1 A-P-ABORT parameter 9.4.2 A-P-ABORT service procedure ITU-T Rec . X.217 (1
13、995 E) Page 1 1 1 2 2 2 2 2 3 3 3 3 4 4 4 5 5 5 6 6 6 7 7 7 8 8 8 % 8 8 10 10 10 10 10 10 10 15 15 15 16 17 17 17 18 18 18 i . Ob12810 22b 9.5 A-UNIT-DATA service 9.5.1 A-UNIT-DATA Parameters 9.5.2 A-UNIT-DATA procedure . 10 Sequencing information . 10.1 10.2 10.3 10.4 10.5 A-ASSOCIATE 10.1.1 Type o
14、f service 10.1.2 Usage restrictions 10.1.3 Disrupted service procedures 10.1.4 Disrupting service procedures . 10.1.5 Collisions A-RELEASE . 10.2.1 Type of service 10.2.2 Usage restnctions 10.2.3 Disrupted service procedures 10.2.5 Collisions 10.2.4 Disrupting service procedures . 10.2.6 Further seq
15、uencing information 10.3.1 Type of service 10.3.3 Disrupted service procedures 10.3.4 Disrupting service procedures . 10.3.6 Further sequencing information 10.4.1 Type of service 10.4.2 Usage restrictions 10.4.3 Disrupted service procedures 10.4.4 Disrupting service procedures . A-ABORT . 10.3.2 Usa
16、ge restrictions 10.3.5 Collisions A-P-ABORT . A-UNIT-DATA 10.5.1 Type of service 10.5.2 Usage restrictions 10.5.3 Disrupted services . 10.5.4 Disrupting services Page 18 18 19 19 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 21 21 21 21 21 21 21 21 21 21 21 21 21 21 11 10.5.5 Collisions 21 ITU-T R
17、ec . X.217 (1995 E) ITU-T RECMN*X.227 95 4862571 Ob12821 162 W Summary This Recommendation I Intemational Standard provides the service definition for the Association Control Service Element (ACSE) which is used to establish and release OS1 application associations. Introduction This Service Definit
18、ion is one of a set of Recommendations and International Standards produced to facilitate the interconnection of information processing systems. It is related to other Recommendations and International Standards in the set as defined by the Reference Model for Open Systems Interconnection (see ITU-T
19、 Rec. X.200 I ISO/IEC 7498-1). The Reference Modei subdivides the area of standardization for interconnection into a series of layers of specification, each of manageable size. The goal of Open Systems Interconnection is to allow, with a minimum of technical agreement outside the interconnection Rec
20、ommendations I Intemational Standards, the interconnection of information processing systems: - from different manufacturers; - under different managements; - - of different technologies. of different levels of complexity; and This Service Definition recognizes that application-processes may wish to
21、 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 defines services provid
22、ed by the application-service-element for application-association control: the Association Control Service Element (ACSE). The ACSE provides basic facilities for the control of an application association between two application-entities. The ACSE includes two optional functional units. One functiona
23、l unit supports the exchange of information in support of authentication during association establishment. The second functional unit supports the negotiation of application context during association establishment. The ACSE services apply to a wide range of application-process communications. The A
24、CSE services apply to a wide range of application-process communication requirements. It is recognized that, with respect to ACSE Quality of Services (QOS) described in clause 9, work is still in progress to provide an integrated treatment of QOS across all layers of the OS1 Reference Model, and to
25、ensure that the 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. ITU-T Rec. X.217 (1995 E) iii ITU-T RECMN*
26、X=217 95 m 4862593 Ob12812 OT9 m 1TU-T RECNNtX.237 95 = 4862593 Ob32833 T35 = ISO/IEC 8649 : 1996 (E) INTERNATIONAL STANDARD ITU-T RECOMMENDATION INFORMATION TECHNOLOGY - OPEN SYSTEMS INTERCONNECTION - SERVICE DEFINITION FOR THE ASSOCIATION CONTROL SERVICE ELEMENT 1 Scope This Service Definition def
27、ines ACSE services for application-association control in an open systems interconnection environment. ACSE supports two modes of communication service: connection-oriented and connectionless. The ACSE connection-oriented service is provided by the use of the connection-oriented ACSE protocol (see I
28、T-T Rec. X.227 I ISOAEC 8650-1) in conjunction with the connection-oriented presentation-service (see IT-T Rec. X.216 I ISOAEC 8822). The ACSE connection-oriented service assumes as a minimum the use of the presentation-service connection-oriented Kernel functional unit. The ACSE connectionless serv
29、ice (A-UNIT-DATA) is provided by the use of the connectionless ACSE protocol (see IT-T Rec. X.237 I ISOEC 10035- I) in conjunction with the connectionless presentation-service (P-UNIT-DATA). Three functional units are defined in the ACSE. The mandatory Kernel functional unit is used to establish and
30、 release application-associations. The ACSE includes two optional functional units. The optional Authentication functional unit supports the exchange of information in support of authentication during association establishment. It provides additional facilities for exchanging information in support
31、of authentication during association establishment without adding services. The ACSE authentication facilities may be used to support a limited class of authentication methods. The second optional functional unit supports the negotiation of application context during association establishment. The A
32、CSE services apply to a wide range of application-process communications. This Service Definition does not specify individual implementations or products, nor does it constrain the implementation of entities and interfaces within a computer system. No requirement is made for conformance to this Serv
33、ice Definition. 2 Normative references The following Recommendations and International Standards contain provisions which, through reference in this tect, constitute provisions of this Recommendation I International Standard. At the time of publication, the editions indicated were valid. All Recomme
34、ndations and International Standards are subject to revision, and the parties to agreements based on this Recommendation I International Standard are encouraged to investigate the possibility of applying the most recent edition of the Recommendations and Standards listed below. Members of IEC and IS
35、0 maintain registers of currently valid International Standards. The Telecommunication Standardization Bureau of the IT maintains a list of currently valid IT-T Recommendations. 2.1 Identical Recommendations I International Standards - IT-T Recommendation X.200 (1994) I ISOAEC 7498-1:1994, Znfonnati
36、on technology - Open Systems Interconnection - Basic Reference Model: The Basic Model. IT-T Recommendation X.207 (1993) I ISOAEC 9545:1994, Znfonnation technology - Open Systems Interconnection - Application Layer structure. IT-T Recommendation X.210 (1993) I ISO/IEC 10731:1994, Infonnation technolo
37、gy - Open Systems Interconnection - Basic Reference Model: Conventions for the definition of OSi services. IT-T Recommendation X.215 (1995) I ISOIEC 8326:1996, Information technofogy - Open Systems Interconnection - Session service definition. IT-T Recommendation X.216 (1994) I ISOIEC 88221994, Info
38、rmation technology - Open Systems Interconnection - Presentation service definition. - - - - ITU-T Rec. X.217 (1995 E) 1 ISO/IEC 8649 : 1996 (E) IT-T Recommendation X.225 (1995) I ISOAEC 8327-1: 1996, Information technology - Open Systems Interconnection - Connection-oriented Session protocol: Proto
39、col spectjcation. ITU-T Recommendation X.227 (1995) I ISOAEC 8650-1: 1996, Information technology - Open Systems Interconnection - Connection-oriented protocol for the Association Control Service Element: Protocol specification. IT-T Recommendation X.237 (1995) I ISO/IEC 10035-1: 1995, Information t
40、echnology - Open Systems Interconnection - Connectionless protocol for the Association Control Service Element: Protocol spec$cation. CCITT Recommendation X.660 (1992) I ISO/IEC 9834-1:1993, Information technology - Open Systems Interconnection - Procedures for the operation of OS1 Registration Auth
41、orities: General procedures. 2. Paied Recommendations I International Standards equivalent in technical content - CCITT Recommendation X.650 (1992), Open Systems Interconnection (OSZ) - Reference Model for naming and addressing. IS0 7498-3: 1989, Information processing systems - Open Systems Interco
42、nnection - Basic Reference Model - Part 3: Naming and addressing. CCITT Recommendation X.800 (1991), Security architecture for Open Systems Interconnection for CCIIT applications. IS0 7498-2: 1989, Information processing systems - Open Systems Interconnection - Basic Reference Model - Part 2: Securi
43、ty Architecture. - 2.3 Additional references - CCIT Recommendation X.410 (19841, Message Handling Systems: Remote operation and reiiable transfer server. IS0 6523:1984, Data interchange - Structures for the identification of organizations. - 3 Definitions For the purposes of this Recommendation I In
44、ternational Standard, the following definitions apply: 3.1 Reference model definitions 3.1.1 Basic Reference Model definitions This Service Definition is based on the concepts developed in ITU-T Rec. X.200 I ISOIEC 7498-1. It makes use of the following terms defined in them: a) application-entity; b
45、) application-function; c) application Layer; d) application-process; e) application-protocol-control-information; application-protocol-data-unit ; application-service-element ; connectionless-mode presentation-service; (N)-connectionless-mode transmission; (N)-function; presentation-connection; pre
46、sentation-service; session-connection; n) session-protocol; and o) session-service. 2 ITU-T Rec. X.217 (1995 E) ISO/IEC 8649 : 1996 (E) 3.1.2 Security architecture definitions This Service Definition makes use of the following terms defined in CCITT Rec. X.800 I IS0 7498-2: a) credentials; b) passwo
47、rd; and c) peer-entity authentication. 3.1.3 Naming and addressing definitions This Service Definition makes use of the following terms defined in CCIT Rec. X.650 I IS0 7498-3: a) application-process title; b) application-entity qualifier; c) application-entity title;) d) application-process invocat
48、ion-identifier; e) application-entity invocation-identifier; and f) presentation address. 3.2 Service conventions definitions This Service Definition makes use of the following terms defined in ITU-T Rec. X.210 I ISO/IEC/10731: a) service-provider; b) service-user; c) confirmed service: d) non-confi
49、rmed service; e) provider-initiated service; f) primitive; g) request (primitive); h) indication (primitive); i) response (primitive); and j) confirm (primitive). 3.3 Presentation service definitions This Service Definition makes use of the following terms defined in ITU-T Rec. X.216 I ISOAEC 8822: a) abstract syntax; b) abstract syntax name: c) connectionless-mode (presentation); d) default context; e) defined context set; f) functional unit (presentation); g) normal mode (presentation); h) presentation context; i) presentation data value; and j) X.410-1984 mode
