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In this work, we analyze the design of green routing algorithms and evaluate the achievable energy savings that such mechanisms could allow in several realistic network scenarios. We formulate the problem as a minimum energy routing optimization, which we numerically solve considering a core-network scenario, which can be seen as a worst-case for energy saving performance (as nodes cannot be switched...
Multiprotocol Label Switching (MPLS) is an Internet Engineering Task Force (IETF) specified framework that provides for the efficient designation, routing, forwarding and switching of traffic flows through the network. MPLS is a versatile solution to address the problems faced by present-day networks like speed, scalability, quality-of-service (QoS) management, and traffic engineering. MPLS carries...
Optical packet switching (OPS) technologies are among the most promising solutions for next generation network architectures. Resource contention resolution and Quality of Service (QoS) management mechanisms have been developed in order to remedy the lack of optical buffering and implement multi-service support in OPS networks. In this paper we propose an analytical model for the access and core nodes...
Network operators have understood the importance of migrating their backbone networks to IP over WDM architectures, whereby an underlying optical infrastructure can automatically set up and tear down direct optical connections (lightpaths), yet keeping electronic IP routers on top of it. In such multi-layer networks, it is necessary to efficiently combine the resources available in both electronic...
In this research, the performance evaluation of two class priority Delta Multistage Interconnection Networks (MINs) is analyzed, using a discrete priority queuing model. All Delta Networks are constructed by special switching elements (SEs) based on an architecture which natively supports two classes of routing traffic. The proposed analytical method which was developed for performance metrics investigation...
Grid networks have captured a lot of attention in recent years because of their potential to generate new applications thanks to network, computing and storage resources virtualization. Quality of service (QoS) is a key issue for grid services provisioning. Current grid services are provided on multi service networks such as the Internet. Thus, QoS architectures originally developed for the Internet...
The goal of this paper is to present a system able to support the network delivery of live events in an expected, future Digital Cinema scenario. This service can consume a large amount of network bandwidth, due to the large volume of transmitted data and to the number of receivers, thus multicast transmission proves to be very useful. Consequently, a key issue of the system is the request routing...
The concept of SATO (Service-aware Adaptive Transport overlays) is proposed within a European project (Ambient Networks). It introduces a virtual network, named overlay network, to fit the particular requirements of the Ambient Networks' services, and to achieve service adaptation and service customization. In its first phase, the QoS consideration design relied only on the underlying physical network,...
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