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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