1、INTERNATIONAL TELECOMMUNICATION UNION ITU-T TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU X.217 Amendment 2 (08197) SERIES X: DATA NETWORKS AND OPEN SYSTEM COMM U N I CATI ON Open System Interconnection - Service definitions Information technology - Open Systems Interconnection - Service definitio
2、n for the association control service element Amendment 2: Fast-associate mechanism ITU-T Recommendation X.217 - Amendment 2 (Previously CCITT Recommendation) COPYRIGHT International Telecommunications Union/ITU TelecommunicationsLicensed by Information Handling ServicesITU-T X-SERIES RECOMMENDATION
3、S DATA NETWORKS AND OPEN SYSTEM COMMUNICATION PUBLIC DATA NETWORKS Services and facilities Interfaces Transmission, signalling and switching Network aspects Maintenance Administrative arrangements OPEN SYSTEM INTERCONNECTION X. l-X. 199 X. l-X. 19 X.20-X.49 X.50-X.89 X .90-X. 149 X. 150-X. 179 X.180
4、-X.199 X.200-X.299 Model and notation X.200-X.209 Service deftions X.210-X.219 Connection-mode protocol specifications Connectionless-mode protocol specifications PICS profomas Protocol Identification Security Protocols Layer Managed Objects Conformance testing INTERWORKING BETWEEN NETWORKS General
5、Satellite data transmission systems MESSAGE HANDLING SYSTEMS DIRECTORY OS1 NETWORKING AND SYSTEM ASPECTS Networking Efficiency Naming, Addressing and Registration Abstract Syntax Notation One (ASN. 1) OS1 MANAGEMENT Systems Management framework and architecture Management Communication Service and P
6、rotocol Structure of Management Information Management functions SECURITY OS1 APPLICATIONS Commitment, Concurrency and Recovery Transaction processing Remote operations OPEN DISTRIBUTED PROCESSING 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 X.300-X.399 X.300-X
7、.349 X.350-X.399 X.400-X .499 X.500-X.599 X.600-X.699 X.600-X.629 X.630-X.649 X.650-X.679 X.680-X.699 X.700-X.799 X .700-X . 709 X.710-X.719 X.720-X.729 X.730-X.799 X.800-X. 849 X.850-X.899 X.850-X.859 X.860-X.879 X.880-X.899 X.900-X.999 For further details, please refer to ITU-T List of Recommendat
8、ions. COPYRIGHT International Telecommunications Union/ITU TelecommunicationsLicensed by Information Handling ServicesINTERNATIONAL STANDARD 8649 ITU-T RECOMMENDATION X.217 INFORMATION TECHNOLOGY - OPEN SYSTEMS INTERCONNECTION - SERVICE DEFINITION FOR THE ASSOCIATION CONTROL SERVICE ELEMENT AMENDMEN
9、T 2 Fast-associate mechanism Summary The fast-associate mechanism allows a session connection, including its embedded presentation connection and application association, to be established using a compressed form of the information that would otherwise be sent on the S-CONNECT exchange. The compress
10、ed 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 would be sent on the full-form connect messages. The upper-layer context identifier may be
11、 parameterized to include values for the variable fields allowed by the fill form protocols for the upper layers. Within the ACSE service, the only addition is the presence of a conceptual parameter which summarizes the contents of the User infomation of the A-ASSOCIATE primitives. Source The ITU-T
12、Recommendation X.217, Amendment 2 was approved on the 9th of August 1997. The identical text is also published as ISOAEC International Standard 8649. ITU-T Rec. X.217 (1995)/Amd. 2 (1997 E) 1 COPYRIGHT International Telecommunications Union/ITU TelecommunicationsLicensed by Information Handling Serv
13、icesSTD*ITU-T RECMN X.217 AMD 2-ENGL 1777 m 48b2571 Ob43493 2bb m FOREWORD ITU (International Telecommunication Union) is the United Nations Specialized Agency in the field of telecommuni- cations. The ITU Telecommunication Standardization Sector (ITU-T) is a permanent organ of the ITU. The ITU-T is
14、 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, establishes the topics for study
15、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 ITU-Ts purview, the nece
16、ssary 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 IT draws attention to
17、the possibility that the practice or implementation of this Recommendation may involve the use of a claimed Intellectual Propery Right. The ITU takes no position concerning the evidence, validity or applicability of claimed Intellectual Property Rights, whether asserted by ITU members or others outs
18、ide of the Recommendation development process. As of the date of approval of this Recommendation, the IT had not received notice of intellectual property, protected by patents, which may be required to implement this Recommendation. However, implementors are cautioned that this may not represent the
19、 latest information and are therefore strongly urged to consult the TSB patent database. O ITU 1998 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, without permission in writin
20、g from the ITU. 11 ITU-T Rec. X.217 (1995)lAmd. 2 (1997 E) COPYRIGHT International Telecommunications Union/ITU TelecommunicationsLicensed by Information Handling ServicesCONTENTS 1) Introduction 2) Subclause 8.2.1 3) Subclause 9.1.1.1 . 4) New subclause 9.1.1.1 8 bis Page 1 1 1 1 ITU-T Rec . X.217
21、(1995)/Amd . 2 (1997 E) . 111 COPYRIGHT International Telecommunications Union/ITU TelecommunicationsLicensed by Information Handling Services - STD-ITU-T RECMN X-217 AMD 2-ENGL 1997 W 48b2.591 Ob43495 037 W IsoDEC 8649 : 1996Amd.2 : 1998 (E) Parameter Name Req User Summary U INTERNATIONAL STANDARD
22、Ind RSP Cnf C(=) U C(=) ITU-T RECOMMENDATION INFORMATION TECHNOLOGY - OPEN SYSTEMS INTERCONNECTION - SERVICE DEFINITION FOR THE ASSOCIATION CONTROL SERVICE ELEMENT AMENDMENT 2 Fast-associate mechanism 1) Introduction Add the following paragraphs: The fast-associate mechanism allows a session connect
23、ion, including its embedded presentation connection and application association, to be established using a compressed form of 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 cont
24、ext specification, which is a definition of the fields of the application, ACSE, presentation and session protocols that would 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 protoco
25、ls for the upper layers. Within the ACSE service, the only addition is the presence of a conceptual parameter which summarizes the contents of the User information of the A-ASSOCIATE primitives. 2) Subclause 8.2.1 In Table 2, add “User Summary” to the list ofparameters for A-ASSOCIATE Service after
26、User Information: 3) Subclause 9.1.1.1 Add a row in Table 3, after User Information: 4) New subclause 9.1.1.18 bis Add a new subclause 9.1.1.18 bis aper 9.1.1.18: 9.1.1.18 bis User summary User Summary is a parameter that summarizes the semar layer context specification. ic c n :nt of the User Infor
27、mation, by reference to n upper- ITU-T Rec. X.217 (1995)/Amd. 2 (1997 E) 1 COPYRIGHT International Telecommunications Union/ITU TelecommunicationsLicensed by Information Handling ServicesSeries A Series B Series C Series D Series E Series F Series G Series H Series I Series J Series K Series L Serie
28、s M Series N Series O Series P Series Q Series R Series S Series T Series U Series V Series X Series Z ITU-T RECOMMENDATIONS SERIES Organization of the work of the ITU-T Means of expression: definitions, symbols, classification General telecommunication statistics General tariff principles Overall n
29、etwork operation, telephone service, service operation and human factors Non-telephone telecommunication services Transmission systems and media, digital systems and networks Audiovisual and multimedia systems Integrated services digital network Transmission of television, sound programme and other
30、multimedia signals Protection against interference Construction, installation and protection of cables and other elements of outside plant TMN and network maintenance: international transmission systems, telephone circuits, telegraphy, facsimile and leased circuits Maintenance: international sound p
31、rogramme and television transmission circuits Specifications of measuring equipment Telephone transmission quality, telephone installations, local line networks Switching and signalling Telegraph transmission Telegraph services terminal equipment Terminals for telematic services Telegraph switching Data communication over the telephone network Data networks and open system communication Programming languages COPYRIGHT International Telecommunications Union/ITU TelecommunicationsLicensed by Information Handling Services
