Admela Jukan

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Cloud Computing is a model of service delivery and access where dynamically scalable and virtualized resources are provided as a service over the Internet. This model creates a new horizon of opportunity for enterprises. It introduces new operating and business models that allow customers to pay for the resources they effectively use, instead of making(More)
The rapid increase of the number of mobile subscribers as well as the deployment of 3G technologies are putting strain on mobile backhaul operational expenditures (OPEX) which amount to 20-40% of total mobile operator’s OPEX due to their reliance on T1/E1 copper lines. For these reasons, the current backhaul systems, a term commonly used to describe(More)
Load adaptive energy saving schemes for backbone IP networks use dynamic transport circuit services to adapt the active network resources to the current traffic demand in order to reduce the network's energy consumption. Recently, several approaches, categorized as Switch-off schemes, have been proposed which attempt to reduce the energy consumption of(More)
Elastic optical path networks have been proposed as a promising approach to flexibly use the optical spectrum (hence the name flexi-grid) thus overcoming the rigidness of traditional WDM networks where optical channel spacing is equidistant irrespectively of the type of signal transmitted. Past research effort in spectrum allocation focused on single(More)
e-Science applications present a new challenge for networks, as they require high bandwidth connectivity to support leadership class supercomputers (teraflops+) and, at the same time, highly dynamic operation. Significant research activity has been carried out to meet this challenge and, in particular, in understanding how to provision and use high-capacity(More)
Utilizing the dormant path diversity through multipath routing in the Internet to reach end-users – thereby fulfilling their QoS requirements – is rather logical. While offering better resource utilization, better reliability and often even much better quality of experience (QoE), multipath routing and provisioning was shown to help network and data center(More)
In this paper, we present a simple case study on energy efficiency in IP-over-WDM networks with dynamic circuit capability and compare two different load adaptive schemes, referred to as switch-on and switch-off. While the switch-off technique was already proposed for energy conservation, the switch-on approach is a new paradigm which is based purely on(More)
Despite the research advances in intra-domain lightpath provisioning in WDM networks, efficient and practical schemes for path computation and resource advertisement in multi-domain mesh networks still need to be developed. Most of the proposed solutions in the literature lacks the ability to convey optical network-specific Traffic Engineering information(More)
The emergence of carrier grade transport technologies has led to a paradigm shift in inter-domain routing which became an important feature of the transport layer based on optical transmission and switching. While the new technologies have capabilities to provide end-to-end guaranteed quality of service (QoS), the lack of inter-operability between different(More)