SIST ETS 300 484 E1:2003

• Abstract:

  Define the capabilities to control under Management operations the connection supervision function (HCS/LCS) in SDH Network Element

• Status: Published
• Publication Date: 30-Nov-2003
• ICS: 33.040.20 - Transmission systems
• Technical Committee: SS EIT - Technical Board for the electrotechnical, information technology and telecommunications fields
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 01-Dec-2003
• Due Date: 01-Dec-2003
• Completion Date: 01-Dec-2003
• Ref Project: ETSI ETS 300 484 ed.1 (1996-09) - Transmission and Multiplexing (TM); Synchronous Digital Hierarchy (SDH) network information model; Connection supervision function (Higher order Connection Supervision / Lower order Connection Supervision (HCS/LCS)) for the Network Element (NE) view

SIST ETS 300 484 E1:2003 is the Slovenian adoption of ETS 300 484 Edition 1 from ETSI. It specifies the Synchronous Digital Hierarchy (SDH) network information model for the connection supervision function, covering Higher order Connection Supervision / Lower order Connection Supervision (HCS/LCS) in the Network Element (NE) view. In practice, it gives management systems and SDH equipment a common way to represent and control supervised connection termination points.

What does SIST ETS 300 484 E1:2003 specify?

SIST ETS 300 484 E1:2003 specifies the information model used at the interface between Network Elements and management systems for SDH equipment that uses HCS/LCS. It is the NE-side model for managing connection supervision objects and their behavior.

The document focuses on the SDH equipment domain visible at the element manager to element interface and at the Q3 interface. It covers information available inside that domain, not network-level management processes.

It defines:

• the information model for SDH NEs using connection supervision function
• the managed object view for HCS/LCS in the NE

It leaves out:

• the protocol stack for message communication
• network-level management processes
• application contexts
• conformance requirements for implementations
• information models for other systems or equipment

The document is organized into clauses on scope, normative references, abbreviations, the connection supervision information model, managed object class definitions, package definitions, attribute definitions, and name binding definitions. Annex A gives figures, and Annex B gives a bibliography.

What are the key requirements of SIST ETS 300 484 E1:2003?

SIST ETS 300 484 E1:2003 models HCS/LCS as part of SDH connection supervision, with behavior derived from the functional blocks defined for SDH equipment. The practical result is that supervision is represented as managed objects, not as an implementation-specific feature hidden inside the equipment.

Connection supervision is modeled through supervised CTPs

Clause 4.1 models an open higher-order or lower-order connection as a supervised Connection Termination Point (CTP). Higher-order supervision uses supervised AU4CTP objects, and lower-order supervision uses supervised TU3/TU2/TU12/TU11 CTP objects.

This matters because an unused connection still needs a managed representation. Supervisory state is therefore visible to management tools.

Supervised objects should be created automatically when needed

Clause 4.1 says that when an AU4CTP or TUxCTP must be created, and the equipment can provide HCS/LCS, the supervised CTP should be created automatically instead of the plain CTP. In practice, element and network management software should support automatic object creation during TTP creation or SDH reconfiguration.

Monitoring and generation are managed separately

Clause 4.1 uses the attributes generatorEnabled and monitorActive to model activation and deactivation. These control the unequipped generator part and the path overhead monitor part independently.

This separation matters because an operator may need to enable trace generation without enabling monitoring, or the reverse. The model keeps those actions distinct.

HCS/LCS can be active only to the extent the equipment supports

Clause 4.2 states that HCS/LCS may be optional and may be supported from 0% to 100% for a given equipment type. Clause 4.1 also says a SET to TRUE on generatorEnabled or monitorActive may be rejected depending on the dynamic state of the NE.

In practice, management systems need to handle partial support and possible rejection of activation requests.

Performance monitoring is tied to supervised CTPs

Clause 4.1 links performance measurement for sink or bi-directional supervised CTPs to a currentData subclass for path termination. The performance information includes background block errors, errored seconds, severely errored seconds, and unavailable seconds, with some values also available for the far end.

If monitorActive is FALSE during part of a performance measurement period, the data is not reliable and should be marked with suspectIntervalFlag. That helps operators avoid using incomplete performance data for reporting or fault analysis.

The functional basis comes from SDH overhead monitoring and generation

Clause 4.2 summarizes the two key functions: monitoring parts of higher-order or lower-order path overhead for alarms and performance data, and generating supervisory unequipped overhead with a Path Trace. In practice, HCS/LCS supports both detection and generation of supervision information on the path.

What terms does SIST ETS 300 484 E1:2003 define?

• NE (Network Element) - The SDH equipment being managed by the model.
• SDH (Synchronous Digital Hierarchy) - The transport hierarchy for which the model is written.
• HCS (Higher order Connection Supervision) - Supervision for higher-order paths.
• LCS (Lower order Connection Supervision) - Supervision for lower-order paths.
• CTP (Connection Termination Point) - The managed object type that is subclassed into supervised CTPs.
• HPOM (Higher order Path Overhead Monitor) - The subfunction that monitors higher-order path overhead.
• HUG (Higher order Unequipped Generator) - The subfunction that generates supervisory unequipped higher-order path overhead.
• TTP (Trail Termination Point) - The superior object whose creation can trigger supervised CTP creation.

Who uses SIST ETS 300 484 E1:2003?

SIST ETS 300 484 E1:2003 is used by SDH equipment vendors, network management system designers, and telecommunications operators that manage SDH Network Elements. It is also relevant for element managers and for engineers who need a consistent NE-side object model for connection supervision.

Quality and integration teams use it when they need to check that SDH equipment exposes the right managed objects, attributes, and name bindings for HCS/LCS. Buyers can use it to compare whether different SDH platforms support the same management model.

Which standards are used with SIST ETS 300 484 E1:2003?

• ITU-T Recommendation G.774 - Provides the base SDH management information model for the Network Element view and the superclass structure used here.
• ITU-T Recommendation G.774.05 - Provides the SDH management of connection supervision functionality for the NE view and is the direct model base for the objects, packages, attributes, and name bindings imported here.
• ITU-T Recommendation G.783 - Defines the SDH equipment functional blocks that underpin the HCS/LCS behavior.
• ETS 300 304 - Named in the bibliography as the broader SDH information model for the NE view.
• ETS 300 417-1-1 - Named in the bibliography as the source for generic functional requirements for SDH equipment.

What does the SIST ETS 300 484 E1:2003 document contain?

The document contains the information model description for HCS/LCS, then the object-oriented definitions that implement that model in the NE view. It imports managed object classes, packages, attributes, and name bindings from the related SDH information model and connection supervision specifications.

It also gives the structure needed for performance monitoring of supervised CTPs, including the currentData relationship for path termination. Annex A provides figures showing inheritance and containment relationships, and Annex B lists background references used for the model.

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Prenos in multipleksiranje (TM) – Informacijski model sinhrone digitalne hierarhije (SDH) – Funkcija za nadzorovanje zvez (nadzorovanje zvez višje ravni / nadzorovanje zvez nižje ravni (HCS/LCS)), gledano s strani omrežnega elementa (NE)Transmission and Multiplexing (TM); Synchronous Digital Hierarchy (SDH) network information model; Connection supervision function (Higher order Connection Supervision / Lower order Connection Supervision (HCS/LCS)) for the Network Element (NE) view33.040.20Prenosni sistemTransmission systemsICS:Ta slovenski standard je istoveten z:ETS 300 484 Edition 1SIST ETS 300 484 E1:2003en01-december-2003SIST ETS 300 484 E1:2003SLOVENSKI
STANDARD
EUROPEANETS 300 484TELECOMMUNICATIONSeptember 1996STANDARDSource: ETSI TC-TMReference: DE/TM-02220ICS:33.080Key words:transmission, SDH, information model, NETransmission and Multiplexing (TM);Synchronous Digital Hierarchy (SDH) information model;Connection supervision function (Higher order ConnectionSupervision / Lower order Connection Supervision (HCS/LCS))for the Network Element (NE) viewETSIEuropean Telecommunications Standards InstituteETSI SecretariatPostal address: F-06921 Sophia Antipolis CEDEX - FRANCEOffice address: 650 Route des Lucioles - Sophia Antipolis - Valbonne - FRANCEX.400: c=fr, a=atlas, p=etsi, s=secretariat - Internet: [e-mail].: [phone] - Fax: [phone]Copyright Notification: No part may be reproduced except as authorized by written permission. The copyright and theforegoing restriction extend to reproduction in all media.© European Telecommunications Standards Institute 1996. All rights reserved.SIST ETS 300 484 E1:2003

Page 2ETS 300 484: September 1996Whilst every care has been taken in the preparation and publication of this document, errors in content,typographical or otherwise, may occur. If you have comments concerning its accuracy, please write to"ETSI Editing and Committee Support Dept." at the address shown on the title page.SIST ETS 300 484 E1:2003

Page 3ETS 300 484: September 1996ContentsForeword.51Scope.72Normative references.73Abbreviations.84Information model of connection supervision.84.1Overview.84.2Requirements.95Managed object class definitions.96Package definitions.97Attribute definitions.108Name binding definitions.10Annex A (informative):Figures.11Annex B (informative):Bibliography.12History.13SIST ETS 300 484 E1:2003

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Page 5ETS 300 484: September 1996ForewordThis European Telecommunication Standard (ETS) has been produced by the Transmission andMultiplexing (TM) Technical Committee of the European Telecommunications Standards Institute (ETSI).The ETS describes managed object classes of the information model for Network Elements (NEs), whichprovide the connection supervision function (Higher order Connection Supervision / Lower orderConnection Supervision (HCS/LCS)).Transposition datesDate of adoption of this ETS:16 August 1996Date of latest announcement of this ETS (doa):31 December 1996Date of latest publication of new National Standardor endorsement of this ETS (dop/e):30 June 1997Date of withdrawal of any conflicting National Standard (dow):30 June 1997SIST ETS 300 484 E1:2003

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Page 7ETS 300 484: September 19961ScopeThis European Telecommunication Standard (ETS) defines the information model to be used at theinterface between Network Elements (NEs) and management systems, for the management of NEs whichuse the connection supervision function (Higher Order Connection Supervision / Lower Order ConnectionSupervision (HCS/LCS)).This ETS defines:-the information model for Synchronous Digital Hierarchy (SDH) NEs using connection supervisionfunction.This ETS does not define:-the protocol stack to be used for message communication;-the network level management processes;-the application contexts;-the conformance requirements to be met by an implementation of this information model;-information models for other systems or equipment.The information model (and the corresponding message set) defined in this ETS is concerned with themanagement of NEs, the equipment by which they are implemented and the functions contained withinthem. More precisely, it applies to an equipment domain visible at the element manager to elementinterface and is only concerned with information available within that domain. Information proper to thedomain of a network level management process is not included within this model.The HCS and LCS functional blocks (connection supervision) are specified as optional components and astandardized modelling at the Q3 interface is provided by this ETS. The connection supervisionfunctionality is included into subclasses of SDH connection termination points.2Normative referencesThis ETS incorporates by dated and undated reference, provisions from other publications. Thesenormative references are cited at the appropriate places in the text and the publications are listedhereafter. For dated references, subsequent amendments to or revisions of any of these publicationsapply to this ETS only when incorporated in it by amendment or revision. For undated references the latestedition of the publication referred to applies.[1]ITU-T Recommendation G.774 (1992): "Synchronous digital hierarchy (SDH)management information model for the network element view".[2]ITU-T Recommendation G.774.05 (1995): "Synchronous digital hierarchy (SDH)management of connection supervision functionality (HCS/LCS) for the networkelement view".[3]ITU-T Recommendation G.783 (1993): "Characteristics of synchronous digitalhierarchy (SDH) equipment functional blocks".SIST ETS 300 484 E1:2003

Page 8ETS 300 484: September 19963AbbreviationsFor the purposes of this ETS, the following abbreviations apply:CTPConnection Termination PointHCSHigher order Connection SupervisionHPAHigher order Path AdaptationHPCHigher order Path ConnectionHPOM Higher order Path Overhead MonitorHUG Higher order Unequipped GeneratorLCSLower order Connection SupervisionLPC Lower order Path ConnectionLPOM Lower order Path Overhead MonitorLUG Lower order Unequipped GeneratorMSAMultiplex Section AdaptationNENetwork ElementSDHSynchronous Digital HierarchyTTPTrail Termination PointVCVirtual Container4Information model of connection supervision4.1Overviewa)HCS and LCS may b
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