1、INTERNATIONAL TELECOMMUNICATION UNION ITU-T TELECOMMU N I CATION STANDARDIZATION SECTOR OF ITU x.743 (06/98) SERIES X: DATA NETWORKS AND OPEN SYSTEM COM M U N I CATI O N S OS1 management - Management functions and ODMA functions Information technology - Open Systems Interconnection - Systems Managem
2、ent: Time management function ITU-T Recommendation X.743 (Previously CCITT Recommendation) ITU-T X-SERIES RECOMMENDATIONS DATA NETWORKS AND OPEN SYSTEM COMMUNICATIONS PUBLIC DATA NETWORKS Services and facilities Interfaces Transmission, signalling and switching Network aspects Maintenance Administra
3、tive arrangements OPEN SYSTEMS INTERCONNECTION 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
4、General Satellite data transmission systems MESSAGE HANDLING SYSTEMS DIRECTORY OS1 NETWORKING AND SYSTEM ASPECTS Networking Efficiency Quality of service Naming, Addressing and Registration Abstract Syntax Notation One (ASN. 1) OS1 MANAGEMENT Systems Management framework and architecture Management
5、Communication Service and Protocol Structure of Management Information X. I-X. 19 X.20-X.49 X.50-X.89 X.90-X. 149 X.150-X.179 X. 1 80-X. 199 X.200-X.209 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 X.300-X.349 X.350-X.399 X.400-X.499 X.500-X.599 X.6
6、00-X.629 X.630-X.639 X.640-X.649 X.650-X.679 X.680-X.699 X.700-X.709 X.710-X.719 X.720-X.729 I ncti MA functions x.730-x.799 SECURITY OS1 APPLICATIONS Commitment, Concurrency and Recovery Transaction processing Remote operations OPEN DISTRIBUTED PROCESSING X. SOO-X.849 X.850-X.859 X.860-X.879 X.880-
7、X.899 x.900-x.999 For firther details, please refer to ITU-T List of Recommendations. INTERNATIONAL STANDARD 10164-20 ITU-T RECOMMENDATION X.743 INFORMATION TECHNOLOGY - OPEN SYSTEMS INTERCONNECTION - SYSTEMS MANAGEMENT: TIME MANAGEMENT FUNCTION Source The ITU-T Recommendation X.743 was approved on
8、the 26th of June 1998. The identical text is also published as ISO/IEC International Standard 10164-20. ITU-T Rec. X.743 (1998 E) 1 FOREWORD IT (International Telecommunication Union) is the United Nations Specialized Agency in the field of telecommuni- cations. The ITU Telecommunication Standardiza
9、tion Sector (ITU-T) is a permanent organ 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)
10、, which meets every four years, establishes 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 infor
11、mation technology which fall within ITU-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 agen
12、cy. INTELLECTUAL PROPERTY RIGHTS The IT 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 Pro
13、perty Rights, whether asserted by ITU 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. Howeve
14、r, impiementors are cautioned that this 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, inclu
15、ding photocopying and microfilm, without permission in writing from the ITU, except as noted in footnotes 2) to 8) in Annexes B to G respectively. 11 ITU-T Rec. X.743 (1998 E) CONTENTS Scope Normative references 2.1 Identical Recommendations I International Standards . 2.2 Paired Recommendations I I
16、nternational Standards equivalent in technical content . 2.3 Additional references Definitions 3.1 Management framework definitions 3.2 Systems management overview definitions 3.3 CMIS definitions . 3.4 Management information model definitions . 3.5 Guidelines for the definition of managed objects d
17、efinitions 3.6 Implementation conformance statement proforma definitions 3.7 Additional definitions Abbreviations . Conventions Requirements 6.1 Time representation requirements . 6.2 Time accuracy and precision requirements . 6.3 Time distribution requirements . 6.4 Time service reliability require
18、ments 6.5 Local clock requirements Model 7.1 Generic time functionality . 7.2 Time Management Function 7.2.1 Time-related resources 7.2.2 Time management functions . 7.2.3 7.2.4 The clockSource managed object 7.2.5 The synchronizationProtoco1 managed object . 7.3 Clock coordination function 7.3.1 Ti
19、me synchronization protocol 7.3.2 Procedures for time synchronization . 7.4 Time user function . Time management function managed objects . Generic definitions . 8.1 The representation of time . 8.2 Managed object classes . 8.2.1 Clock source 8.2.2 Local clock Reference clock . 8.2.3 8.2.4 Synchroni
20、zation protocol 8.3 Attribute definitions 8.3.1 Clock Adjustment Interval 8.3.2 Clock Drift . 8.3.3 Clock Estimated Error . 8.3.4 Clock Event Code 8.3.5 Clock Event Counter . Page 1 1 2 3 3 3 3 3 4 4 4 4 4 5 5 6 6 6 7 7 7 7 8 9 9 9 10 10 11 12 12 12 13 13 13 14 14 14 15 15 15 15 15 15 15 15 ITU-T Re
21、c . X.743 (1998 E) iii 8.3.6 8.3.7 8.3.8 8.3.9 8.3.10 8.3.1 1 8.3.12 8.3.13 8.3.14 8.3.15 8.3.16 8.3.17 8.3.18 8.3.19 8.3.20 8.3.21 8.3.22 Clock Event Time Clock ID Clock Maximum Error Clock Precision . Clock Status . Clock Stratum Clock Value . Leap Second Count . Leap Second Indication . Local Clo
22、ck Address . Peer Clock Addresses Reference Clock Type . Synchronization Protocol ID . Synchronization Protocol Type . Synchronization Source Address . Synchronizing Clock . Synchronized Clock 8.4 Action definitions 8.4.2 Leap second . 8.5 Name binding definitions Clock Source - System Synchronizati
23、on Protocol - System . 8.4.1 Clock reset . 8.4.3 Protocol reset . 8.5.1 8.5.2 9 Service definitions 9.1 PT-CREATE service . 9.2 PT-DELETE service 9.3 PT-SET service . 9.4 PT-GET service . 9.5 State Change service . 9.6 Clock Reset service . 9.7 Leap Second service 9.8 Protocol Reset service . 10 Fun
24、ctional units 11 Protocol . 11.1 Elements of procedure . 11.1.1 Clock reset procedure 1 1.1.2 Leap second procedure 1 1.1.3 Protocol reset procedure 11.2 Abstract syntax 11.2.1 Objects . 11.2.2 Attributes . 11.2.3 Actions 11.2.4 Name bindings . Negotiation of functional units 11.3 12 Relationships w
25、ith other functions . 13 Conformance 13.1 Static conformance 13.2 Dynamic conformance 13.3 Management implementation conformance statement requirements . Annex A -Definition of Time Management Information . A.l Managed object classes . A.l.l clockSource . A.1.2 IocalClock A.1.3 referenceclock A . 1.
26、4 synchronizationProtoco1 Page 15 15 15 15 15 15 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 17 17 17 17 17 17 17 17 17 18 18 18 20 20 20 20 20 21 21 21 22 22 22 23 23 23 23 23 23 24 24 24 25 25 25 iv ITU-T Rec . X.743 (1998 E) . - ._._._ . STD-ITU-T RECMN X-743-ENGL 3998 W 4862573 Ob55813 30T W A.
27、2 Attribute definitions A.2.1 A.2.2 A.2.3 A.2.4 A.2.5 A.2.6 A.2.1 A.2.8 A.2.9 A.2.1 O A.2.11 A.2.12 A.2.13 A.2.14 A.2.15 A.2.16 A.2.17 A.2.18 A.2.19 A.2.20 A.2.21 A.2.22 clockAdjustmentInterva1 . clockDrift clockEstimatedError clockEventCode clockEventCounter clockEventTime . ClOCkID clockMaximumErr
28、or . cloc Wrecision . clockStatus clockStratum clockValue . 1eapSecondCount . IeapSecondIndication 1ocalClockAddress peerClockAddresses referenceClockType s y nchronizationProtocolID s ynchronizationProtocolType s ynchronizationSourceAddress . synchronizedllock synchronizingllocks . A.3 Action defin
29、itions A.3.1 clockReset . A.3.2 leapsecond A.3.3 protocolReset . A.4 Name binding definitions A.4.1 clockSource-system . A.4.2 synchronizationProtoco1-system ASN.l definition module for management information ASN.1 definition module for time representation . AS A.6 Page 26 26 26 26 26 26 26 27 27 27
30、 27 27 27 28 28 28 28 28 28 29 29 29 29 29 29 29 30 30 30 30 30 34 ITU-T Rec . X.743 (1998 E) V Introduction ITU-T Rec. X.700 series I ISO/IEC 10164 is a Series of Recommendations I International Standards developed according to ITU-T Rec X.200 I ISO/IEC 7498-1 and ITU-T Rec. X.700 I ISO/IEC 7498-4.
31、 ITU-T Rec. X.700 series I ISO/IEC 10164 is related to the following International Standards: CCITT X.710 I ISO/IEC 9595:1990, Information technology - Open System Interconnection - Common management information service definition; CCITT X.711 and CCITT X.712 I ISOIEC 9596:1990, Information technolo
32、gy - Open System Interconnection - Common management information protocol specification; CCIT X.701 I ISO/IEC 10040:1992, Information technology - Open Systems Interconnection - Systems management overview; CCITT Recs. X.730, X.740 series and IT-T Rec. X.750 series I ISOIEC 10064:1992, Information t
33、echnology - Open Systems Interconnection - Systems Management. - - - - OS1 management standardization inevitably involves coordinated work by a number of standards bodies. ITU-T SG 7 and ISOIEC JTC 1 SC 21NG 4 are jointly responsible for the development of Recommendations I International Standards t
34、hat describe the architecture for OS1 managemnt, the services, protocols, and functions that are used for systems management, and the structure of management information. Other working groups, in IT-T, ISO/IEC JTC 1 SC 21, ISO/IEC JTC 1 SC 6 and elsewhere, are responsible for the development of Reco
35、mmendations I International Standards that describe the management aspects of particular layers of the OS1 Basic Reference Model; these may describe (N)-layer management protocols, management aspects of (N)-layer operation, and managed objects that provide a “management view“ of aspects of the layer
36、 operation and are visible to systems management. vi ITU-T Rec. X.743 (1998 E) INTERNATIONAL STANDARD ITU-T RECOMMENDATION INFORMATION TECHNOLOGY - OPEN SYSTEMS INTERCONNECTION - SYSTEMS MANAGEMENT: TIME MANAGEMENT FUNCTION 1 Scope This Recommendation I International Standard defines a Systems Manag
37、ement Function that may be used by an application process in a centralized or decentralized management environment to interact for the purpose of systems management, as defined by ITU-T Rec. X.200 I ISOAEC 7498-1. This Recommendation I International Standard defines a function which consists of gene
38、ric definitions, services, and functional units. This function is positioned in the application layer of ITU-T Rec.X.200 I ISOAEC 7498-1 and is defined according to the modei provided by IS0 9545. The role of systems management functions is described by CCITT Rec. X.701 I IS0 /IEC 10040. This Recomm
39、endation I International Standard: - defines a service for the management of clocks for use by OS1 management and available for use by OS1 applications and others; establishes user requirements for this Recommendation I International Standard; establishes a time management function model, addressing
40、 the components of a generic time service involving communication between systems, that relates the service and generic definitions provided by this function to the user requirements; defines generic object classes, attribute types, operation types, notification types, and parameters documented in a
41、ccordance with CCITT Rec. X.722 I ISOREC 10165-4; specifies compliance requirements placed on other standards that make use of these generic definitions; defines the services provided by the function; specifies the management protocol that is necessary in order to provide the services; defines the r
42、elationship between these services and systems management operations and notifications; specifies the abstract syntax necessary to identify and negotiate the function unit in the protocol; defines relationships with other systems management functions; specifies conformance requirements to be met by
43、implementation of this Recommendation I International Standard; - - - - - - - - - - - identifies time synchronization protocols. This Recommendation I International Standard does not: - - - - - address the provision of time information within a local system; define the nature of any implementation i
44、ntended to provide the Time Management Function; specify the manner in which management is accomplished by the user of the Time Management Function; define the nature of any interaction which results in the use of the Time Management Function; specify the services necessary for the establishment, us
45、e, and normal or abnormal release of a management association. 2 Normative references The following Recommendations and International Standards contain provisions which, through reference in this text, constitute provisions of this Recommendation I International Standard. At the time of publication,
46、 the editions indicated were valid. Ali 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 ITU-T Rec. X.743 (1998 E) 1 edition of the Recommen
47、dations and International Standards listed below. Members of IEC and IS0 maintain registers of currently valid International Standards. The Telecommunications Standardizations Bureau of the IT maintains a list of currently valid ITU-T Recommendations. 2.1 Identical Recommendations I International St
48、andards - ITU-T Recommendation X.2 10 (1 993) I ISOAEC 1073 1 : 1994, Information technology - Open Systems Interconnection -Basic Reference Model - Conventions for the dejnirion of OS1 services. CCITT Recommendation X.701 (1992) I ISOAEC 10040: 1992, Information technology - Open Systems Interconne
49、ction - Systems management overview). CCITT Recommendation X.720 (1992) I ISOfiEC 10165-1:1993, Information technology - Open Systems Interconnection - Structure of management information: Management Information Model. CCITT Recommendation X.721 (1992) I ISO/IEC 10165-2: 1992, Information technology - Open Systems Interconnection - Structure of management information: DeBnition of management information. CCITT Recommendation X.722 (1992) I ISO/IEC 10165-4: 1992, Information technology - Open Systems Interconnection - Structure of management information: Guidelines f
