Author
Djamal Zeghlache
Other affiliations: Telecom & Management SudParis, University of Paris, Institut Mines-Télécom ...read more
Bio: Djamal Zeghlache is an academic researcher from Telecom SudParis. The author has contributed to research in topics: Wireless network & Cloud computing. The author has an hindex of 30, co-authored 235 publications receiving 3986 citations. Previous affiliations of Djamal Zeghlache include Telecom & Management SudParis & University of Paris.
Papers published on a yearly basis
Papers
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19 May 2008
TL;DR: This paper addresses the challenge of assigning VNs to the underlying physical network in a distributed and efficient manner and proposes a VN mapping protocol to communicate and exchange messages between agent-based substrate nodes to achieve the mapping.
Abstract: Network visualization is a promising concept to diversify the future Internet architecture into separate virtual networks (VN) that can support simultaneously multiple network experiments, services and architectures over a shared substrate network. To take full advantage of this paradigm this paper addresses the challenge of assigning VNs to the underlying physical network in a distributed and efficient manner. A distributed algorithm responsible for load balancing and mapping virtual nodes and links to substrate nodes and links has been designed, implemented and evaluated. A VN mapping protocol is proposed to communicate and exchange messages between agent-based substrate nodes to achieve the mapping. Results of the implementation and a performance evaluation of the distributed VN mapping algorithm using a multi-agent approach are reported.
298 citations
TL;DR: Exact and heuristics optimization algorithms for the provisioning of virtual networks involving multiple infrastructure providers are presented and virtual network embedding is formulated and solved as a mixed integer program with the aim of decreasing embedding cost for infrastructure providers while increasing the acceptance ratio of requests.
269 citations
TL;DR: Simulation results show the good performance of the proposed trust management system and especially highlight its ability to deter a class of common attacks designed to target trust management systems.
258 citations
13 May 2013
TL;DR: Experimental results show the benefits of combining the allocation and migration algorithms and demonstrate their ability to achieve significant energy savings while maintaining feasible convergence times when compared with the best fit heuristic.
Abstract: This paper presents two exact algorithms for energy efficient scheduling of virtual machines (VMs) in cloud data centers. Modeling of energy aware allocation and consolidation to minimize overall energy consumption leads us to the combination of an optimal allocation algorithm with a consolidation algorithm relying on migration of VMs at service departures. The optimal allocation algorithm is solved as a bin packing problem with a minimum power consumption objective. It is compared with an energy aware best fit algorithm. The exact migration algorithm results from a linear and integer formulation of VM migration to adapt placement when resources are released. The proposed migration is general and goes beyond the current state of the art by minimizing both the number of migrations needed for consolidation and energy consumption in a single algorithm with a set of valid inequalities and conditions. Experimental results show the benefits of combining the allocation and migration algorithms and demonstrate their ability to achieve significant energy savings while maintaining feasible convergence times when compared with the best fit heuristic.
208 citations
Patent•
02 Feb 2007
TL;DR: In this article, an autonomic network node system for providing at least one virtual router (VR) for providing on demand virtual routing service, the autonomic node system includes a plurality of autonomic router components (ARCs) comprising at least 1 autonomic control component (ACC) and at least 2 autonomic forwarding component (AFC).
Abstract: An autonomic network node system for providing at least one virtual router (VR) for providing on demand virtual routing service, the autonomic network node system includes a plurality of autonomic router components (ARCs) comprising at least one autonomic control component (ACC) and at least one autonomic forwarding component (AFC), physical resources comprising a plurality of logical resource partitions (LRPs), at least one database for storing information relating to the plurality of ARCs and LRPs, and a autonomic framework configured for receiving at least one request of on demand virtual routing service, accessing at the at least one database, allocating at least one LRP to perform at least one ARC to be installed in the autonomic network node system, installing the at least one ARC in the autonomic network node system, allocating the installed ARC and, updating the at least one database.
205 citations
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Proceedings Article•
01 Jan 1991TL;DR: It is concluded that properly augmented and power-controlled multiple-cell CDMA (code division multiple access) promises a quantum increase in current cellular capacity.
Abstract: It is shown that, particularly for terrestrial cellular telephony, the interference-suppression feature of CDMA (code division multiple access) can result in a many-fold increase in capacity over analog and even over competing digital techniques. A single-cell system, such as a hubbed satellite network, is addressed, and the basic expression for capacity is developed. The corresponding expressions for a multiple-cell system are derived. and the distribution on the number of users supportable per cell is determined. It is concluded that properly augmented and power-controlled multiple-cell CDMA promises a quantum increase in current cellular capacity. >
2,951 citations
TL;DR: In this article, the authors present the main research challenges and the existing solutions in the field of IoT security, identifying open issues and suggesting some hints for future research, and suggest some hints to future research.
1,258 citations
TL;DR: The existing technologies and a wide array of past and state-of-the-art projects on network virtualization are surveyed followed by a discussion of major challenges in this area.
1,235 citations
TL;DR: This paper presents the key features and the driver technologies of IoT, and identifies the application scenarios and the correspondent potential applications, and focuses on research challenges and open issues to be faced for the IoT realization in the real world.
1,178 citations
TL;DR: A survey of current research in the Virtual Network Embedding (VNE) area is presented and a taxonomy of current approaches to the VNE problem is provided and opportunities for further research are discussed.
Abstract: Network virtualization is recognized as an enabling technology for the future Internet. It aims to overcome the resistance of the current Internet to architectural change. Application of this technology relies on algorithms that can instantiate virtualized networks on a substrate infrastructure, optimizing the layout for service-relevant metrics. This class of algorithms is commonly known as "Virtual Network Embedding (VNE)" algorithms. This paper presents a survey of current research in the VNE area. Based upon a novel classification scheme for VNE algorithms a taxonomy of current approaches to the VNE problem is provided and opportunities for further research are discussed.
1,174 citations