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Computer networks, in particular the Internet, represent essential infrastructure for business, government, military, and personal communication. Several recent trends in technology and network use have pushed the capabilities required of the Internet beyond what can be provided by the currently deployed infrastructure. To address these limitations, the network community has developed a variety of...
Wavelength Division Multiplexing (WDM) networks of the future are likely to use Flexgrid, providing operators with additional flexibility when assigning spectrum compared to traditional WDM networks using the 50GHz ITU grid. Flexgrid breaks the spectrum up into small (typically 12.5GHz) slots, but its key feature is that contiguous slots can be joined together to form arbitrary sized blocks of spectrum...
As both cloud applications and infrastructure technologies become more advanced, there is a general expectation that cloud based applications are going to experience improved end-to-end performance assurance while maintaining a competitive cost of service. In this paper, the authors continue to explore the potential performance and cost advantages, which may originate when applying joint optimization...
The rise of cloud computing and other emerging web applications has increased significantly the network traffic inside the data centers. In this paper we present the future requirements of data centers such as the need for higher bandwidth and the need for more energy-efficient interconnection network inside the data centers. This need comes both from the exponential rise of the network traffic inside...
We have proposed the FISSION (Flexible Interconnection of Scalable Systems Integrated using Optical Networks) architecture for data-centers in [1]. The Fission architecture comprises of the creation of sectors that comprise of server systems and switches are backplane wired up using optical buses. These optical buses deploy ultra-dense wavelength division multiplexing (UDWDM). A modified Carrier Ethernet...
‘Traffic-aware’ networking is a solution allowing the improvement of the energy efficiency of optical networks. The implementation of these networking schemes makes possible to adapt the number of fully powered systems to the amount of carried traffic. Various traffic-aware schemes are available in the literature; some acting on the optical amplifiers, others on the optoelectronic (OE) devices. In...
The stochastic nature and power fluctuations of renewable energy sources are two major parameters affecting the stability of the power grid. Traditionally, this issue has been addressed through energy storage elements i.e. batteries, having the disadvantages of increased cost and limited operational lifetime. In this paper, it is argued that a cost effective solution to this problem is to orchestrate...
Due to increasing traffic volumes and access bandwidths, the power consumption of core networks will grow considerably. Adapting network configuration to traffic load is one counter-measure. Dynamic optical bypassing is a promising approach to reconfigure multi-layer networks: it adapts the virtual topology while keeping traffic on fixed paths in the physical topology. So far, research focused on...
This paper presents a Software Defined Networking (SDN) control plane based on an overlay GMPLS control model. The SDN control platform manages optical core networks (WDM/DWDM networks) and the associated access networks (GPON networks), which makes it possible to gather global in- formation and enable wider areas' energy efficiency networking. The energy related information of the networks and the...
While the design and the provisioning of survivable optical networks have already been studied for a long time, networks across the world are still experiencing a phenomenal growth in data traffic, leading to more complex design and provisioning problems. Network architectures are changing rapidly to meet the new end-user requirements, with many new technovirtual developments and new economical/environmental...
RWA is a fundamental problem in the design and control of optical networks. We propose link selection algorithms that reduce the size of the link-based ILP formulation for RWA by pruning redundant link decision variables. The resulting formulation scales well to mesh topologies representative of backbone and regional networks. In our experiments, the new formulation decreases the running time by more...
Multicast routing in optical WDM networks is investigated in the current paper in the presence of optical splitters only at a fraction of the network nodes. This work presents a novel multicast routing algorithm for sparse-splitting networks that is specifically designed for this category of networks. The proposed algorithm is compared with the most efficient multicast routing algorithms for sparse...
Transparent optical networks (TONs) are vulnerable to high-power jamming attacks aimed at service disruption by exploiting the inherent characteristics of optical fibers, amplifiers and switches. In this type of attack, a high-power jamming signal is injected in the network to degrade the quality of legitimate user signals. Conventional survivability approaches which protect transmission in occurrences...
An optical packet and circuit integrated (OPCI) network provides both high-speed, inexpensive services and deterministic-delay, low-data-loss services according to the users' usage scenarios, from the viewpoint of end users. From the viewpoint of network service providers, this network provides large switching capacity with low energy consumption, high flexibility, and efficient resource utilization...
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