Objective
Main Objective
The main objective of project DEMON is to explore new concepts for extending the capability of optical networks and producing results based on practical experience gained from the demonstrators. This, in turn, will provide a valuable input to the standardisation process. The new concepts that will be studied under DEMON are:
-Sub-division of the optical network into transparent domains.
-Signalling flows for operation, administration, and maintenance (OAM).
-Methodology for Quality of Service (QoS) monitoring of optical channels.
-A novel monolithically integrated opto-electronic WDM receiver. Example of an optical network implementation in a metropolitan environment. Different operators and a variety of network architectures coexist.
Technical Approach
To reach the project's goals, the work has been divided into five areas: OAM Signalling & Fault Management: The OAM of an optical network will be analysed from two complementary viewpoints; namely, connection and network layer. Several important topics will be studied such as: intrusive vs. non-intrusive monitoring, types of impairments and defects for the different network layers, and the interaction of maintenance signals in and between the network layers. Furthermore, the OAM signalling impact on fault management and network protection will be studied.
QoS & Performance Management: Transparent networks require new methods for Quality of Service measurements due to the unavailability of access to the frame of the transported data. New principles and techniques to achieve the required performance and the QoS monitoring of an optical channel will be developed. Such techniques will be integrated and evaluated in the demonstrator. The demonstrator management system will be extended to incorporate the new QoS attributes that are generated.
Inter-Domain Networking: DEMON will determine the functionality required in bridging two optical domains, which are not necessarily implemented from all-optical networks, and map this functionality onto the functional architecture. To test the functionality for inter-domain configuration in the demonstrator, novel WDM opto-electronic integrated circuit (OEIC) devices related to 3R regeneration will be developed.
Intra-Domain Networking: In order to optimise the network resource allocations (including cost issues), different routing algorithms within an optical domain will be developed. Moreover, automatic protection strategies and architectures for interconnecting nodes and sub-networks will be studied, and different data classes will be defined in order to extend a transparent domain with different degrees of regeneration.
Network Reference Group: A group will be formed to address horizontal issues among the above mentioned areas. It will define a reference starting view on the architectural, physical aspects, and system specifications for optical networks. The group will also harmonise relevant activities and results within the project. Furthermore, the emerging standards concerning optical network architectural and physical aspects will be considered, and the group will discuss and promote partners' contributions to standardisation bodies reflecting solutions and results identified in the relevant activities of the project. Definitions of intra- and inter-domain connections. The two different optical domains could represent two different operators. There are fundamentally different requirements to intra- and inter-domain connections.
Summary of Trial
The ACTS METON project has developed a reconfigurable optical network demonstrator that is placed within the Stockholm part of the Scandinavian Gigabit Network (SGN), which is a National Host. The major part of this demonstrator will be transferred to DEMON - including four optical add-drop multiplexer (OADM) systems, an optical cross-connect (OXC) system, and a management system. DEMON will also have access to STM-4 and STM-16 terminals and ATM multiplexers. The transfer will assure that a full optical network demonstrator can be maintained with a variety of interfaces to services provided by the SDH and ATM layer.
Expected Achievements
Some of the major expected achievements are listed below:
-Analysis of the OAM signalling impact on Fault Management and of the new QoS attributes' impact on Performance Management, and adaptation of these into the demonstrator management system.
-Development, evaluation, and demonstrator integration of a novel QoS measurement technique.
-Development, evaluation, and demonstrator integration of monolithic WDM OEIC devices.
-Definitions of normalised (transparent) sections for different data classes, based on transmission limitations arising from the analogue character of the optical network.
-Routing principles and algorithms for transparent domains that ensure both long and short term flexibility and efficiency of the network.
-Contributions to standardisation activities within architectural and physical aspects of optical networking at ETSI and ITU.
Expected Impact
DEMON serves the purpose of enabling, stimulating and supporting the introduction of broadband/multimedia services by providing a robust and flexible high bandwidth optical network. This will mean that the full scale of conceivable distribution and interactive services will be available to more or less everybody, from the individual residential customer to business and industrial companies of any size.
Main contributions to the programme objectives:
Main deliverables
Developed and trialled certain key aspects for future evolution of metropolitan optical networks.
Contribution to the programme
Extended capabilities of existing and future optical MANs.
Key Issues
The key issue of DEMON is how to interconnect different networks. This will be investigated vertically (from constructing a bridge between two sub-networks to addressing OAM issues) as well as horizontally (participation of the network into transparent domains, which are further divided into sub-networks). An important topic is the examination of different degrees of regeneration that are needed in and between sub-networks and transparent domains, with given boundaries such as physical limitations and management requirements. Also QoS matters play a significant role here.
Fields of science (EuroSciVoc)
CORDIS classifies projects with EuroSciVoc, a multilingual taxonomy of fields of science, through a semi-automatic process based on NLP techniques.
CORDIS classifies projects with EuroSciVoc, a multilingual taxonomy of fields of science, through a semi-automatic process based on NLP techniques.
- engineering and technologyelectrical engineering, electronic engineering, information engineeringinformation engineeringtelecommunicationstelecommunications networksoptical networks
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Topic(s)
Call for proposal
Data not availableFunding Scheme
CSC - Cost-sharing contractsCoordinator
126 25 Stockholm
Sweden