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1 b Abstract— In this paper promising technologies and a network architecture are presented for future Optical Packet Switched networks. The overall network concept is presented and the major choices are highlighted and compared with alternative solutions. Both long and shorter term approaches are considered as well as both the WAN and MAN parts of the(More)
Optical networks are moving from opaque and translucent architectures towards all-optical (transparent) architectures. In translucent architectures a small amount of regeneration (e.g. optical–electronic–optical conversion) is available in the network. The incorporation of the physical impairments in the routing and wavelength assignment (RWA) problem in(More)
Nanonetworks will enable advanced applications of nanotechnology in the biomedical, industrial, environmental and military fields, by allowing integrated nano-devices to communicate and to share information. Due to the expectedly very high density of nano-devices in nanonetworks, novel Medium Access Control (MAC) protocols are needed to regulate the access(More)
This paper deals with the fundamentals and current standardization efforts for IEEE 802.17 RPR (Resilient Packet Ring). Its special resilience features make this technology robust against outages of the network infrastructure. The goals of this paper are threefold. Firstly, the fundamentals of RPR and the standardization process carried out under the(More)
This paper investigates the performance of translucent Optical Transport Networks (OTNs) under different traffic and knowledge conditions, varying from perfect knowledge to drifts and uncertainties in the physical-layer parameters. Our focus is on the regular operation of a translucent OTN, i.e., after the dimensioning and regenerator placement phase. Our(More)
This paper describes the MEHARI system for monitoring and analysing the traffic on National R&D Networks (NRN). The ma design requirement of the MEHARI system was to cope with the main challenges currently faced by most of these networks: Service usage, charging schemes, network dimensioning and auditing procedures according to a given Acceptable Use Policy(More)
Monitoring and mining real-time network data streams is crucial for managing and operating data networks. The information that network operators desire to extract from the network traffic is of different size, granularity and accuracy depending on the measurement task (e.g., relevant data for capacity planning and intrusion detection are very different). To(More)
House Gases (GHG) emissions of network infrastructures are becoming major issues in the Information and Communication Society (ICS). Current optical network infrastructures (routers, switches, line cards, signal regenerators, optical amplifiers, etc.) have reached huge bandwidth capacity but the development has not been compensated adequately as for their(More)
Power management strategies that allow network infrastructures to achieve advanced functionalities with limited energy budget are expected to induce significant cost savings and positive effects on the environment, reducing Green House Gases (GHG) emissions. Power consumption can be drastically reduced on individual network elements by temporarily switching(More)