Overview

The explosive growth of data, particularly internet traffic, has led to a dramatic increase in demand for transmission bandwidth imposing an immediate requirement for broadband networks. The primary objective of the COST 291 Action Towards Digital Optical Networks was to focus on novel network concepts, subsystems and architectures to enable future telecommunication networks, exploiting the features and properties of photonic technologies.

Three working groups were established to deal with these research objectives:

WG1 Optical processing for digital network performance, dealt with the physical layer and implementation related issues of transparent optical networks such as optical signal per bit processing, optical switch architecture designs and implementations as well as transmission related issues.

WG2 Novel network architectures, focused on the evolution of network scenarios including novel network architectures. Also different node architectures and technologies in terms of network performance and functionality were investigated. Three different architectures were studied and compared: circuit (wavelength, waveband, etc.), optical burst and optical packet switched networks.

WG3 Unified control plane, network resilience and service security, dealt as well with the impact of transparency on photonic network architectures and the associated control and protocol issues as on network survivability and security issues, covering topics such as protection and restoration, its impact on routing and wavelength assignment algorithms, fault isolation, disaster recovery, etc.

The results obtained within these working groups are collected in this volume.

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