1、 INTERNATIONAL TELECOMMUNICATION UNION ITU-T G.774.3 TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU (02/2001) SERIES G: TRANSMISSION SYSTEMS AND MEDIA, DIGITAL SYSTEMS AND NETWORKS Digital terminal equipments Operations, administration and maintenance features of transmission equipment Synchronous
2、digital hierarchy (SDH) Management of multiplex-section protection for the network element view ITU-T Recommendation G.774.3 (Formerly CCITT Recommendation) ITU-T G-SERIES RECOMMENDATIONS TRANSMISSION SYSTEMS AND MEDIA, DIGITAL SYSTEMS AND NETWORKS INTERNATIONAL TELEPHONE CONNECTIONS AND CIRCUITS G.
3、100G.199 GENERAL CHARACTERISTICS COMMON TO ALL ANALOGUE CARRIER-TRANSMISSION SYSTEMS G.200G.299 INDIVIDUAL CHARACTERISTICS OF INTERNATIONAL CARRIER TELEPHONE SYSTEMS ON METALLIC LINES G.300G.399 GENERAL CHARACTERISTICS OF INTERNATIONAL CARRIER TELEPHONE SYSTEMS ON RADIO-RELAY OR SATELLITE LINKS AND
4、INTERCONNECTION WITH METALLIC LINES G.400G.449 COORDINATION OF RADIOTELEPHONY AND LINE TELEPHONY G.450G.499 TESTING EQUIPMENTS G.500G.599 TRANSMISSION MEDIA CHARACTERISTICS G.600G.699 DIGITAL TERMINAL EQUIPMENTS G.700G.799 General G.700G.709 Coding of analogue signals by pulse code modulation G.710G
5、.719 Coding of analogue signals by methods other than PCM G.720G.729 Principal characteristics of primary multiplex equipment G.730G.739 Principal characteristics of second order multiplex equipment G.740G.749 Principal characteristics of higher order multiplex equipment G.750G.759 Principal charact
6、eristics of transcoder and digital multiplication equipment G.760G.769 Operations, administration and maintenance features of transmission equipment G.770G.779 Principal characteristics of multiplexing equipment for the synchronous digital hierarchy G.780G.789 Other terminal equipment G.790G.799 DIG
7、ITAL NETWORKS G.800G.899 DIGITAL SECTIONS AND DIGITAL LINE SYSTEM G.900G.999 For further details, please refer to the list of ITU-T Recommendations. ITU-T G.774.3 (02/2001) i ITU-T Recommendation G.774.3 Synchronous digital hierarchy (SDH) Management of multiplex-section protection for the network e
8、lement view Summary This Recommendation provides an information model for the Synchronous Digital Hierarchy (SDH). This model describes the managed object classes and their properties for the protection switching function, as defined in ITU-T G.803 and as related to SDH transmission resources. These
9、 objects are useful to describe information exchanged across interfaces defined in ITU-T M.3010 Telecommunications Management Network (TMN) architecture for the management of the protection function. Document History Issue Notes 2001 First revision incorporated the changes documented in the G.774.3
10、Corrigendum 1. 11/1994 Initial version of the Recommendation. Source ITU-T Recommendation G.774.3 was revised by ITU-T Study Group 15 (2001-2004) and approved under the WTSA Resolution 1 procedure on 9 February 2001. ii ITU-T G.774.3 (02/2001) FOREWORD The International Telecommunication Union (ITU)
11、 is the United Nations specialized agency in the field of telecommunications. The ITU Telecommunication Standardization Sector (ITU-T) is a permanent organ of ITU. ITU-T is responsible for studying technical, operating and tariff questions and issuing Recommendations on them with a view to standardi
12、zing telecommunications on a worldwide basis. The World Telecommunication Standardization Assembly (WTSA), which meets every four years, establishes the topics for study by the ITU-T study groups which, in turn, produce Recommendations on these topics. The approval of ITU-T Recommendations is covere
13、d by the procedure laid down in WTSA Resolution 1. In some areas of information technology which fall within ITU-Ts purview, the necessary standards are prepared on a collaborative basis with ISO and IEC. NOTE In this Recommendation, the expression “Administration“ is used for conciseness to indicat
14、e both a telecommunication administration and a recognized operating agency. INTELLECTUAL PROPERTY RIGHTS ITU draws attention to the possibility that the practice or implementation of this Recommendation may involve the use of a claimed Intellectual Property Right. ITU takes no position concerning t
15、he evidence, validity or applicability of claimed Intellectual Property Rights, whether asserted by ITU members or others outside of the Recommendation development process. As of the date of approval of this Recommendation, ITU had not received notice of intellectual property, protected by patents,
16、which may be required to implement this Recommendation. However, implementors are cautioned that this may not represent the latest information and are therefore strongly urged to consult the TSB patent database. ITU 2002 All rights reserved. No part of this publication may be reproduced or utilized
17、in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from ITU. ITU-T G.774.3 (02/2001) iii CONTENTS Page 1 Scope. 1 2 References. 1 3 Terms and Definitions 3 4 Abbreviations 3 5 Multiplex-section protection management model 4 5.1
18、Overview. 4 5.2 SDH multiplex-section protection requirements 5 5.2.1 Generic SDH transmission protection functional requirements 5 5.2.2 SDH multiplex-section specific functional requirements 5 6 Managed Object Class Definitions . 6 6.1 APS report record . 7 6.2 Protected TTP bidirectional 7 6.3 Pr
19、otected TTP sink 7 6.4 Protected TTP source 8 6.5 Protection group 8 6.6 Protection unit. 9 6.7 SDH multiplex-section protection group 10 6.8 SDH multiplex-section protection unit. 10 6.9 Unprotected CTP bidirectional . 11 6.10 Unprotected CTP sink. 11 6.11 Unprotected CTP source. 11 7 Packages 12 7
20、.1 Extra traffic control. 12 7.2 Last attempt result. 12 7.3 Protection Switch Exercise . 12 7.4 Protection Mismatch Status 12 7.5 Priority 12 7.6 SDH Priority . 12 8 Attributes 13 8.1 Channel Number . 13 8.2 Last attempt result. 13 8.3 Priority 13 8.4 Protected trail termination point identifier 13
21、 iv ITU-T G.774.3 (02/2001) Page 8.5 Reported protection unit . 14 8.6 Protection group identifier 14 8.7 Protection group type 14 8.8 Protection mismatch status . 14 8.9 Protection status 15 8.10 Protection switch mode. 17 8.11 Protection unit identifier . 18 8.12 Protecting 18 8.13 Reliable resour
22、ce pointer 18 8.14 Revertive. 18 8.15 SDH Priority . 19 8.16 Unprotected connection termination point identifier 19 8.17 Unreliable resource pointer. 19 8.18 Wait to restore time. 19 8.19 Notified protection unit. 20 9 Actions 20 9.1 Invoke exercise . 20 9.2 Invoke protection 20 9.3 Release protecti
23、on. 21 10 Notifications 21 10.1 Protection Switch Reporting. 22 11 Parameters. 22 11.1 Invoke Protection Error 22 11.2 Release Protection Error . 22 11.3 Protection Status Parameter 23 12 Name Bindings . 23 12.1 Protected Trail Termination Point 24 12.2 Protection Group. 25 12.3 Aug 25 12.4 Protecti
24、on unit. 25 12.5 Unprotected connection termination point . 25 13 Subordination rules. 26 14 Pointer constraints. 26 15 Supporting ASN.1 productions. 26 ITU-T G.774.3 (02/2001) v Page Appendix I Naming and Inheritance Diagrams 30 Appendix II Examples of MS Protection 32 ITU-T G.774.3 (02/2001) 1 ITU
25、-T Recommendation G.774.3 Synchronous digital hierarchy (SDH) Management of multiplex-section protection for the network element view 1 Scope This Recommendation provides an information model, as related to the protection function for the Synchronous Digital Hierarchy (SDH). It identifies the Teleco
26、mmunications Management Network (TMN) object classes required for the management of the protection function for SDH network elements. These objects are relevant to information exchanged across standardized interfaces defined in the Recommendation ITU-T M.3010 TMN architecture. This Recommendation ap
27、plies to SDH network elements which perform the Multiplex Section protection function and those systems in the TMN that manage SDH network elements. Functional capabilities of SDH multiplex equipment, particularly the Multiplex Section protection switching function, are given in ITU-T G.783. Perform
28、ance monitoring requirements for Multiplex Section protection (for the management of SDH equipment with this capability) are provided in ITU-T G.784, however, the information model which supports these can be found in ITU-T G.774.1. The new objects defined in this Recommendation supersede those defi
29、ned in ITU-T G.774.3 (1994). For each object class, attribute, action, notification, parameter defined in this Recommendation it shall be indicated what the impacts upon the existing ITU-T G.774.3 (1994) are. Structure of this Recommendation Clause 5.1 provides an overview of the SDH protection info
30、rmation model in this Recommendation. Clauses 3 to 15 describe the information model using the notation mechanisms defined in ITU-T X.722 Guidelines for the Definition of Managed Objects. Clause 15 contains the syntax definitions of the information carried in the protocol using Abstract Syntax Notat
31、ion One (ASN.1) defined in ITU-T X.680-X.683. Naming and Inheritance are diagrammatically shown in informative Appendix I. Diagrams illustrating the application of the SDH protection model are provided in informative Appendix II. 2 References The following ITU-T Recommendations and other references
32、contain provisions which, through reference in this text, constitute provisions of this Recommendation. At the time of publication, the editions indicated were valid. All Recommendations and other references are subject to revision: users of this Recommendation are therefore encouraged to investigat
33、e the possibility of applying the most recent edition of the Recommendations and other references listed below. A list of the currently valid ITU-T Recommendations is regularly published. ITU-T G.707/Y.1322 (2000), Network node interface for the synchronous digital hierarchy (SDH). ITU-T G.773 (1993
34、), Protocol suites for Q-interfaces for management of transmission systems. ITU-T G.774 (2001), Synchronous digital hierarchy (SDH) Management information model for the network element view. ITU-T G.783 (2000), Characteristics of synchronous digital hierarchy (SDH) equipment functional blocks. 2 ITU
35、-T G.774.3 (02/2001) ITU-T G.784 (1999), Synchronous digital hierarchy (SDH) management. ITU-T G.803 (2000), Architecture of transport networks based on the synchronous digital hierarchy (SDH). ITU-T G.831 (2000), Management capabilities of transport networks based on the synchronous digital hierarc
36、hy (SDH). ITU-T G.958 (1994), Digital line systems based on the synchronous digital hierarchy for use on optical fibre cables. ITU-T M.60 (1993), Maintenance terminology and definitions. ITU-T M.2120 (2000), PDH path, section and transmission system and SDH path and multiplex section fault detection
37、 and localization procedures. ITU-T M.3010 (2000), Principles for a telecommunications management network. ITU-T M.3013 (2000), Considerations for a telecommunications management network. ITU-T M.3100 (1995), Generic network information model. ITU-T Q.811 (1997), Lower layer protocol profiles for th
38、e Q3 and X interfaces. ITU-T Q.812 (1997), Upper layer protocol profiles for the Q3 and X interfaces. ITU-T Q.822 (1994), Stage 1, Stage 2 and Stage 3 description for the Q3-interface Performance management. ITU-T X.680 to X.683 (1997), Information technology Abstract Syntax Notation One (ASN.1). IT
39、U-T X.701 (1997), Information technology Open Systems Interconnection Systems management overview. ITU-T X.710 (1997), Information technology Open Systems Interconnection Common management information service. ITU-T X.711 (1997), Information technology Open Systems Interconnection Common management
40、information protocol: Specification. ITU-T X.720 (1992), Information technology Open Systems Interconnection Structure of Management Information: Management information model, plus Amd.1 (1995) and Cor.1 (1994). ITU-T X.721 (1992), Information technology Open Systems Interconnection Structure of man
41、agement information: Definition of management information, plus Cor.1 (1994), Cor.2 (1996), Cor.3 (1998) and Cor.4 (2000). ITU-T X.722 (1992), Information technology Open Systems Interconnection Structure of management information: Guidelines for the definition of managed objects, plus Amd.1 (1995),
42、 Amd.2 (1997) and Cor.1 (1996). ITU-T X.730 (1992), Information technology Open Systems Interconnection Systems management: Object management function, plus Amd.1 (1995) and Amd.1/Cor.1 (1996). ITU-T X.731 (1992), Information technology Open Systems Interconnection Systems management: State manageme
43、nt function, plus Amd.1 (1995), Cor.1 (1995) and Amd.1/Cor.1 (1996). ITU-T X.733 (1992), Information technology Open Systems Interconnection Systems management: Alarm reporting function, plus Cor.1 (1994), Amd.1 (1995), Amd.1/Cor.1 (1996) and Cor.2 (1999). ITU-T G.774.3 (02/2001) 3 ITU-T X.734 (1992
44、), Information technology Open Systems Interconnection Systems management: Event report management function, plus Cor.1 (1994), Amd.1 (1995), Amd.1/Cor.1 (1996) and Cor.2 (1999). ITU-T X.735 (1992), Information technology Open Systems Interconnection Systems management: Log control function, plus Am
45、d.1 (1995) and Amd.1/Cor.1 (1996). 3 Terms and Definitions This Recommendation uses the terms and definitions defined in ITU-T G.774, ITU-T G.784 and ITU-T M.3100. 4 Abbreviations This Recommendation uses the following abbreviations: APDU Application Protocol Data Unit APS Automatic Protection Switc
46、hing CMIP Common Management Information Protocol CMIS Common Management Information Service CTP Connection Termination Point ISO International Organization for Standardization ITU International Telecommunication Union ITU-T International Telecommunication Union Telecommunication Standardization Sect
47、or LOS Loss of Signal MS Multiplex Section MSP Multiplex Section Protection NE Network Element OS Operations System OSI Open Systems Interconnection Pkg Package RDN Relative Distinguished Name SD Signal Degrade SDH Synchronous Digital Hierarchy SF Signal Fail STM-N Synchronous Transport Module N TMN
48、 Telecommunications Management Network TP Termination Point TTP Trail Termination Point WTR Wait-to-Restore 4 ITU-T G.774.3 (02/2001) 5 Multiplex-section protection management model 5.1 Overview The SDH information model for the multiplex-section protection switching function is based on the require
49、ments to provide the protection function for transmission in SDH networks. Resources which must be protected have been modelled and are described in ITU-T G.774. They are based on the Generic Network Information Model of ITU-T M.3100. The Generic Network Information Model includes a Termination Point fragment which serves as a structure for specialization for specific technologies such as the SDH. The information exchanged at a management interface is m
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