1、 INTERNATIONAL TELECOMMUNICATION UNION ITU-T G.774.4 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 the subnetwork connection protection for the network element view ITU-T Recommendation G.774.4 (Formerly CCITT Recommendation) ITU-T G-SERIES RECOMMENDATIONS TRANSMISSION SYSTEMS AND MEDIA, DIGITAL SYSTEMS AND NETWORKS INTERNATIONAL TELEPHONE CONNECTIONS AND CIR
3、CUITS G.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 LI
4、NKS AND 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 modulatio
5、n G.710G.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
6、 characteristics 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
7、.799 DIGITAL 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.774.4 (02/2001) i ITU-T Recommendation G.774.4 Synchronous digital hierarchy (SDH) Management of the subnetwork connection protection f
8、or the network element view Summary This Recommendation provides an information model for the management of subnetwork connection protection of Synchronous Digital Hierarchy (SDH) subnetwork. This model describes the managed object classes and their properties for the subnetwork connection protectio
9、n function, as defined in ITU-T G.803 and as related to SDH network elements. These objects are useful to describe information exchanged across interfaces defined in M.3010 Telecommunications Management Network (TMN) architecture for the management of the subnetwork connection protection function. D
10、ocument history Issue Notes 2001 First revision incorporated the changes documented in the G.774.4 Corrigendum 1. 7/1995 Initial version of the Recommendation. Source ITU-T Recommendation G.774.4 was revised by ITU-T Study Group 15 (2001-2004) and approved under the WTSA Resolution 1 procedure on 9
11、February 2001. ii ITU-T G.774.4 (02/2001) FOREWORD The International Telecommunication 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 tech
12、nical, operating and tariff questions and issuing Recommendations on them with 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,
13、 in turn, produce Recommendations on these topics. The approval of ITU-T Recommendations 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 IE
14、C. 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 ITU draws attention to the possibility that the practice or implementation of this Recommendatio
15、n may involve the use of a claimed Intellectual Property Right. ITU takes no position 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
16、 this Recommendation, ITU 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 latest information and are therefore strongly urged to consult the TSB patent
17、database. ITU 2002 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 writing from ITU. ITU-T G.774.4 (02/2001) iii CONTENTS Page 1 Scope. 1 2 References. 1
18、3 Terms and Definitions 3 4 Abbreviations 3 5 Subnetwork connection protection management model. 4 5.1 Overview. 4 5.2 SDH subnetwork connection protection requirements . 4 6 Managed object class definitions 5 6.1 Connection protection group 6 6.2 Connection protection. 6 6.3 Multipoint connection p
19、rotection 7 6.4 Subnetwork connection protection fabric . 9 7 Packages 9 7.1 Hold off time package. 9 8 Attributes 9 8.1 Hold off time. 9 8.2 Protection criteria 10 8.3 Switch status . 10 9 Actions 11 9.1 Protected connect action . 11 9.2 Protect unprotect connection action 12 10 Parameters. 13 10.1
20、 Switch status . 13 11 Name bindings 14 11.1 Connection protection. 15 11.2 Connection protection group R1. 15 11.3 Cross connection. 15 11.4 Multipoint connection protection 16 11.5 Multipoint cross connection 16 12 Subordination rules. 16 13 Pointer constraints. 16 14 Supporting ASN.1 productions.
21、 16 iv ITU-T G.774.4 (02/2001) Page Annex A Inheritance and naming diagrams . 19 Annex B Examples of subnetwork connection protection 21 B.1 Legends. 21 B.2 Subnetwork connection protection examples . 22 B.3 Bidirectional subnetwork connection protection in rings . 28 B.4 Interconnection of protecte
22、d rings by a cross-connect . 29 B.5 Interconnections of subnetwork with ADMs (SNCP/SNCP) in SNCP interworking 30 B.6 Logical connections in SNCP interworking rings 31 B.7 Logical connections in MS SHARED RINGs interworking 33 B.8 Logical connections in SNCPRing and MS SHARED RING interworking 35 Ann
23、ex C State transition diagrams . 37 C.1 State diagrams. 37 C.2 Allowable values of switchStatus for a protected (mp) connection protection 37 C.3 Allowable values of switchStatus for a protecting (mp) connection protection. 38 C.4 State diagram for a protected connection protection (non-revertive) .
24、 38 C.5 State diagram for a protecting connection protection (non-revertive) 41 C.6 State diagram for a protected connection protection (revertive) 43 C.7 State diagram for a protecting connection protection (revertive) . 45 ITU-T G.774.4 (02/2001) 1 ITU-T Recommendation G.774.4 Synchronous digital
25、hierarchy (SDH) Management of the subnetwork connection protection for the network element view 1 Scope This Recommendation addresses the management of the automatic protection switching within network element at the high and low order path layers. It covers the subnetwork connection protection as d
26、escribed in ITU-T G.803 and G.841. This Recommendation provides an information model, as related to the subnetwork connection protection function for the Synchronous Digital Hierarchy (SDH). It identifies the Telecommunications Management Network (TMN) object classes required for the management of t
27、he subnetwork connection protection function for SDH network elements. These objects are relevant to information exchanged across standardized interfaces defined in ITU-T M.3010 TMN architecture. This Recommendation applies to SDH network elements which perform the subnetwork connection protection f
28、unction and those systems in the TMN that manage SDH network elements. The new objects defined in this Recommendation supersede those defined in ITU-T G.774.4 (1995). For each object class, attribute, action, notification, parameter defined in this Recommendation it shall be indicated what the impac
29、ts upon the existing ITU-T G.774.4 (1995) are. Structure of this Recommendation Clause 5.1 provides an overview of the SDH subnetwork connection protection information model. Clauses 6-14 describe the information model using the notation mechanisms defined in ITU-T X.722, Guidelines for the Definiti
30、on of Managed Objects. Clause 14 contains the syntax definitions of the information carried in the protocol using Abstract Syntax Notation One (ASN.1) defined in ITU-T X.680-X.683. Naming and Inheritance are illustrated in Annex A. The state transition diagrams are provided in Annex C. Diagrams illu
31、strating the subnetwork connection protection are provided in Annex B. 2 References The following Recommendations and other references contain provisions which, through reference in this text, constitute provisions of this Recommendation. At the time of publication, the editions indicated were valid
32、. 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 currently valid ITU-T Recommendations i
33、s 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) Management information model for
34、the network element view. ITU-T G.783 (2000), Characteristics of synchronous digital hierarchy (SDH) equipment functional blocks. 2 ITU-T G.774.4 (02/2001) ITU-T G.784 (1999), Synchronous digital hierarchy (SDH) management. ITU-T G.803 (2000), Architecture of transport networks based on the synchron
35、ous 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 termino
36、logy and definitions. 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), Considerations for a telecommunicatio
37、ns 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, Stage 2 and Stage 3 description fo
38、r 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 technology Open Systems Interconne
39、ction 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 Management Information: Management informat
40、ion model, plus Amd.1 (1995) and Cor.1 (1994). ITU-T X.721 (1992), Information technology Open Systems Interconnection Structure for management 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 technolog
41、y 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 management function, plus Amd.1 (
42、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 Interconnection Systems Management: Ala
43、rm reporting function, plus Cor.1 (1994), Amd.1 (1995), Amd.1/Cor.1 (1996) and Cor.2 (1999). ITU-T G.774.4 (02/2001) 3 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 (1996) and
44、 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, ITU-T G.784 and ITU-T M.3100.
45、4 Abbreviations This Recommendation uses the following abbreviations: APDU Application Protocol Data Unit APS Automatic Protection Switching BSHR Bidirectional Self Healing Ring CMIP Common Management Information Protocol CMIS Common Management Information Service CTP Connection Termination Point IS
46、O International Organization for Standardization ITU-T International Telecommunication Union Telecommunication Standardization Sector LOS Loss Of Signal MS Multiplex Section MSP Multiplex Section Protection NE Network Element OS Operations System OSI Open Systems Interconnection Pkg Package RDN Rela
47、tive Distinguished Name RRP Reliable Resource Pointer SD Signal Degrade SDH Synchronous Digital Hierarchy SF Signal Fail SNCP Subnetwork Connection Protection STM-N Synchronous Transport Module N TMN Telecommunications Management Network TP Termination Point TTP Trail Termination Point URP Unreliabl
48、e Resource Pointer 4 ITU-T G.774.4 (02/2001) WTR Wait-To-Restore 5 Subnetwork connection protection management model 5.1 Overview The model is based on those generic classes and modelling principles outlined in ITU-T M.3100 and on those common classes from ITU-T G.774.3. It provides a similar way to
49、 control and operate the subnetwork connection protection function as the other protection functions. The model defines three subclasses of the generic protection model: connectionProtectionGroupR1 which represents the association of unreliable resources for the purpose of automatic protection switching and which is the focal point for all management operation related to the protection function. connectionProtection which represents the protected
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