1、 INTERNATIONAL TELECOMMUNICATION UNION ITU-T G.774.2 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) Configuration of the payload structure for the network element view ITU-T Recommendation G.774.2 (Formerly CCITT Recommendation) ITU-T G-SERIES RECOMMENDATIONS TRANSMISSION SYSTEMS AND MEDIA, DIGITAL SYSTEMS AND NETWORKS INTERNATIONAL TELEPHONE CONNECTIONS AND CIRCUITS G.100G
3、.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 INTE
4、RCONNECTION 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.719
5、 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 characteris
6、tics 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 DIGITAL
7、 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.774.2 (02/2001) i ITU-T Recommendation G.774.2 Synchronous digital hierarchy (SDH) Configuration of the payload structure for the network element v
8、iew Summary This Recommendation provides an information model for the Payload Configuration Management of Synchronous Digital Hierarchy (SDH) Networks. This model describes the managed object classes and their properties for the Payload Configuration function as related to SDH Network Elements. Thes
9、e 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 Payload Configuration function. Document history Issue Notes 2001 First revision incorporated the changes documented in
10、the G.774.2 Corrigendum 1 (1996). 11/1994 Initial version of the Recommendation. Source ITU-T Recommendation G.774.2 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.774.2 (02/2001) FOREWORD The International Telecommun
11、ication Union (ITU) 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
12、a view to standardizing 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 Recomm
13、endations is covered 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 con
14、ciseness to indicate 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 po
15、sition concerning the 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, pro
16、tected by patents, 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 repr
17、oduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from ITU. ITU-T G.774.2 (02/2001) iii CONTENTS Page 1 Scope. 1 2 References. 1 3 Terms and definitions . 2 4 Abbreviations 3 5 Payload configuration informati
18、on model 3 5.1 Overview. 3 5.2 Requirements 4 6 Object classes 5 6.1 Indirect Adaptors 5 6.2 High Order Path Layer 7 6.3 Low Order Path Layer 9 7 Packages 11 8 Attributes 11 9 Actions 11 9.1 Define AUG Structure 11 9.2 Define VC4 Structure . 12 9.3 Define VC3 Structure . 13 9.4 Define Tug3 Structure
19、 13 9.5 Define Tug2 Structure 14 9.6 Definition of the Client type . 14 10 Notifications 15 11 Parameters. 15 12 Name Bindings . 15 13 Constraint rules. 30 13.1 Constraint rules extended syntax 30 13.1.1 Constraint rules grammar 30 13.1.2 Constraint rule templates. 31 13.2 Connectivity pointer const
20、raints . 31 14 Subordination rules. 42 15 Supporting ASN.1 productions. 51 Appendix I Inheritance and Naming Diagrams 52 ITU-T G.774.2 (02/2001) 1 ITU-T Recommendation G.774.2 Synchronous digital hierarchy (SDH) Configuration of the payload structure for the network element view 1 Scope SDH Payload
21、Configuration Functions are used to configure the various SDH adaptation functions. Modification of the SDH payload structure is done by applying an action on relevant managed objects. These actions are included by subclassing of existing G.774 managed object classes. The new objects defined in this
22、 Recommendation supersede those defined in ITU-T G.774.2 (1994). Structure of this Recommendation Clause 5.1 provides an overview of the SDH Payload Configuration information model. Clauses 6 to 12 describe the information model using the notation mechanisms defined in ITU-T X.722 Guidelines for the
23、 Definition of Managed Objects. Clauses 13 and 14 describe the connectivity pointer constraint rules and the subordination rules applicable to the termination point fragment. Clause 15 contains the syntax definitions of the information carried in the protocol using Abstract Syntax Notation One (ASN.
24、1) defined in ITU-T X.680-X.683. Naming and Inheritance are illustrated in informative Appendix I. 2 References The following ITU-T Recommendations and other references contain provisions which, through reference in this text, constitute provisions of this Recommendation. At the time of publication,
25、 the editions indicated were valid. All Recommendations and other references are subject to revision: users of this Recommendation are therefore encouraged to investigate the possibility of applying the most recent edition of the Recommendations and other references listed below. A list of the curre
26、ntly 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), Protocol suites for Q-interfaces for management of transmission systems. ITU-T G.774 (2001), Synchronous digital hierarchy (SDH)
27、 Management information model for the network element view. ITU-T G.783 (2000), Characteristics of synchronous digital hierarchy (SDH) equipment functional blocks. ITU-T G.784 (1999), Synchronous digital hierarchy (SDH) management. ITU-T G.803 (2000), Architecture of transport networks based on the
28、synchronous digital hierarchy (SDH). ITU-T G.831 (2000), Management capabilities of transport networks based on the synchronous digital hierarchy (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
29、 terminology and definitions. 2 ITU-T G.774.2 (02/2001) ITU-T M.2120 (2000), PDH path, section and transmission system and SDH path and multiplex section fault detection and localization procedures. ITU-T M.3010 (2000), Principles for a telecommunications management network. ITU-T M.3013 (2000), Con
30、siderations for a telecommunications management network. ITU-T M.3100 (1995), Generic network information model. ITU-T Q.811 (1997), Lower layer protocol profiles for the 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,
31、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). ITU-T X.701 (1997), Information technology Open Systems Interconnection Systems management overview. ITU-T X.710 (1997), Information
32、technology Open Systems Interconnection Common management information service. ITU-T X.711 (1997), Information technology Open Systems Interconnection Common management information protocol: Specification. ITU-T X.720 (1992), Information technology Open Systems Interconnection Structure of Managemen
33、t Information: Management information model, plus Amd.1 (1995) and Cor.1 (1994). ITU-T X.721 (1992), Information technology Open Systems Interconnection Structure of management information: Definition of management information, plus Cor.1 (1994), Cor.2 (1996), Cor.3 (1998) and Cor.4 (2000). ITU-T X.
34、722 (1992), Information technology Open Systems Interconnection Structure of management information: Guidelines for the definition of managed objects, plus Amd.1 (1995), Amd.2 (1997) and Cor.1 (1996). ITU-T X.730 (1992), Information technology Open Systems Interconnection Systems Management: Object
35、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 management function, plus Amd.1 (1995), Cor.1 (1995) and Amd.1/Cor.1 (1996). ITU-T X.733 (1992), Information technology Open Systems Interc
36、onnection Systems Management: Alarm reporting function, plus Cor.1 (1994), Amd.1 (1995), Amd.1/Cor.1 (1996) and Cor.2 (1999). ITU-T X.734 (1992), Information technology Open Systems Interconnection Systems Management: Event report management function, plus Cor.1 (1994), Amd.1 (1995), Amd.1/Cor.1 (19
37、96) and Cor.2 (1999). ITU-T X.735 (1992), Information technology Open Systems Interconnection Systems Management: Log control function, plus Amd.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, G.784 and M.3100. ITU-T
38、 G.774.2 (02/2001) 3 4 Abbreviations This Recommendation uses the following abbreviations: AU Administrative Unit AUG Administrative Unit Group Bid Bidirectional CTP Connection Termination Point GTP Group Termination Point Id Identifier MS Multiplex Section NE Network Element OS Operations System OS
39、I Open Systems Interconnection PDH Plesiochronous Digital Hierarchy RS Regenerator Section SDH Synchronous Digital Hierarchy SPI Synchronous Physical Interface TMN Telecommunications Management Network TP Termination Point TTP Trail Termination Point TU Tributary Unit TUG Tributary Unit Group VC-n V
40、irtual Container n 5 Payload configuration information model 5.1 Overview Modification of the SDH frame structure is done by applying an action on relevant managed objects. These actions are included by subclassing of G.774 managed object classes. Actions are applied on the following classes: New Ma
41、naged Object Classes Action used modifiableAugSink defineAUGStructuremodifiableAugSource defineAUGStructuremodifiableAugBidirectional defineAUGStructuremodifiableTug3Sink defineTug3StructuremodifiableTug3Source defineTug3StructuremodifiableTug3Bidirectional defineTug3StructuremodifiableTug2Sink defi
42、neTug2StructuremodifiableTug2Source defineTug2StructuremodifiableTug2Bidirectional defineTug2StructuremodifiableVC4TTPSinkR1 defineVC4StructuremodifiableVC4TTPSourceR1 defineVC4StructuremodifiableVC4TTPBidirectionalR1 defineVC4StructuremodifiableVC3TTPSinkR1 defineVC3Structure4 ITU-T G.774.2 (02/200
43、1) modifiableVC3TTPSourceR1 defineVC3StructuremodifiableVC3TTPBidirectionalR1 defineVC3StructuremodifiableVC2TTPSinkR1 defineClientTypemodifiableVC2TTPSource defineClientTypemodifiableVC2TTPBidirectionalR1 defineClientTypemodifiableVC12TTPSinkR1 defineClientTypemodifiableVC12TTPSource defineClientTy
44、pemodifiableVC12TTPBidirectionalR1 defineClientTypemodifiableVC11TTPSinkR1 defineClientTypemodifiableVC11TTPSource defineClientTypemodifiableVC11TTPBidirectionalR1 defineClientTypeDifferent actions are defined depending on the class of the managed object on which the action is applied. The behaviour
45、 related to the action is specified along with the action definition. For object classes defined in this Recommendation, the specialization is made from object classes defined in ITU-T G.774 according to the following scheme: Sink from Sink; Source from Source; Bidirectional from Bidirectional. The
46、supportableClientList attribute is used to contain a list of managed object classes. Only instances of classes present in the list may be contained by an instance of the class which contains the supportableClientList attribute. In a case where a TP or indirectAdaptor could only contain one type of c
47、lient, the managed object classes from ITU-T G.774 should be used. 5.2 Requirements The choice between instantiation of modifiable or non-modifiable indirect adaptor object classes is made according to the make-up and mode of operation of the network element. The choice between instantiation of modi
48、fiable or non-modifiable trail termination point object classes is made according to the make-up and mode of operation of the network element or by direct OS operations. All the structure below any Trail Termination Point (i.e. vc4TTP, vc3TTP, .) is completely configured once they are created accord
49、ing to a predefined default configuration. Reconfiguration of the multiplexing structure should be supported (i.e. changing a tug3 from a not multiplexed structure into 7 tug2). Configuration or reconfiguration defines the complete subtrees between the Trail Termination Point of the server layer (e.g. vc4TTP) and the Connection Termination Points of its clients (e.g. tu3CTP, tu12CTP, .). In a case when a Trail Termination Point can be cross-connected,
