Servizio Comunitario di Informazione in materia di Ricerca e Sviluppo - CORDIS

Network element management framework

The management operations of a given InfoCom system are accomplished by the Management Gateway (MG) that hosts the Element Management System (EMS). This gateway assumes the responsibility to manage a set of elements and contains the necessary services to autonomously perform management operations.

The management gateway represents the “managed system” to a higher-level “managing system” (also referred to as “manager” or “client”) and for this purpose contains the Management Information Base (MIB) of the elements(s) it is responsible for. The gateway becomes the abstraction of the managed system, that can be treated like a single managed element whose MIB is the collection of the resource elements within the managed system.

The management gateway contains the application logic and it is element-specific. Nevertheless, the design and implementation of management gateways can highly benefit by the availability of a generic element management framework (EMF) that contains the basic services and core MIB representations.

ITU-T has proposed the architecture for such a framework, and provides the standardised approach to its upper-bound interfaces. The standardisation of the upper-bound interfaces is an important factor for the realisation of large-scale EMS systems, since it allows the “plug-and-play” aggregation of MGs, even when these come from third-party providers (conforming to the ITU-T standards).

The guidelines and specifications for the TMN EMF can be found in the following ITU-T Recommendations:
- ITU-T Q.816 CORBA TMN Services.

- ITU-T Q816.1 CORBA-Based TMN services extensions to support coarse-grained interfaces.

- ITU-T X.780 Guidelines for the definition of CORBA managed objects.

- ITU-T X.780.1 TMN guidelines for defining coarse-grained CORBA managed object interfaces.

- ITU-T Recommendation M.3120, CORBA-Based Generic Network Information Model.

The key point in this COACH result is thus the EMF prototype, which is re-usable for any element management system and realises the standardised upper-bound interface.

This result provides the following building blocks:
- Element Management System (EMS) Application: This part is specific to the elements that comprise the management system and their functionality. The prototype has been scoped to MIB II routers and their configuration and monitoring.

- Element Management Framework (EMF): Even though the EMS’s logic varies depending on the elements they manage, a lot of functionality is common. All EMS systems need mechanisms to identify the elements they manage, ways to retrieve them, and services to enable operations on them. These requirements can be met by a common and re-usable framework (the EMF), upon which each EMS can be based to realise the application specific functionality.

- CORBA Component Infrastructure: The EMF itself should be built utilising flexible design, development and deployment principles, independent as much as possible from computational platforms, programming languages capabilities and system engineering constraints. The CORBA Component Model fulfils these requirements and therefore the key point for the EMF designer and implementer is the maximum utilisation of the potentials offered. CCM encapsulates the CORBA logic and through the Container hides the complexity of building distributed applications by abstracting core services (such as CORBA Naming and Notification). Part of the specification objective is to clarify which common object services are essential for the EMF and if the abstraction offered by the container can meet the application requirements.

The COACH result has reached a certain maturity level but still needs further work.

This entails to
- Populating the EMF with all the ITU specified object logic,

- Exploiting the capability of EMF through the development of more complicated and task demanding EMS systems (DSLAMs, SGSN nodes etc),

- Carrying out extensive tests for delays and dependability,

- Progressing the whole EMF logic to a more autonomous nature of handling management actions, and

- Evolving the prototype to a direction that it will be constituted as an integral and valuable part in a complete service management infrastructure (i.e. in such an infrastructure focus will not be solely on network elements but instead on the integrated service and application provision and accountability).

Currently, this COACH result offers valuable information, providing a hands-on experience with the ITU specification materialization, which can be used for validation while building more enhanced telecommunication management systems.

Informazioni correlate

Reported by

Intracom S.A. Hellenic Telecommunications and Electronics Industry
19,5 km Markopoulou Ave.
19002 Peania