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Wavelength-Routing (WR) networks are the most common solution for core networks. With the access segment moving from copper to Passive Optical Networks (PON), core networks will become one of the major culprits of Internet power consumption. However, WR networks offer some design flexibility which can be exploited to mitigate their energy requirements. One of the main steps which has to be faced in...
Passive optical networks (PONs) represent a step forward in "first mile" networks; indeed, by using optical technologies, PONs can transfer a large amount of data, and by being completely passive, they reduce management costs and failure probabilities. Access network is logically a point-to-multipoint network and the tree topology emerged as the winning solution; however, it naturally lacks...
We present the latest results of the WONDER project, a five-year activity focused on all-optical packet networking on a simple architecture based upon commercially available optoelectronic components. We report on our three-node fully-functional network demonstrator.
We focus on metropolitan area networks operating in packet mode and exploiting a single-hop wavelength division multiplexing (WDM) architecture. First, we briefly describe a specific slotted WDM optical network, based on a folded bus topology. Then, we address the fairness problem arising in this architecture and propose an extension of the MetaRing protocol to a WDM scenario. Two possible strategies...
Optical switching fabrics (OSF) are receiving increasing attention in the design of high speed packet switches, due to their excellent properties in terms of available bandwidth and reduced power consumption. However, most optical devices suffer a reconfiguration latency each time input/output connections are modified; unfortunately, this latency may not be negligible with respect to the packet transmission...
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