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Search Results: 1 - 10 of 61 matches for " Hakima Chaouchi "
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Performance Evaluation and Experiments for Host Identity Protocol
Leonardo Arraez,Hakima Chaouchi,Zeynep Gurkas Aydin
International Journal of Computer Science Issues , 2011,
Abstract: This study firstly presents a review for well known Mobile IP and the recently proposed Host Identity Protocol which inherits the separation of roles of IP addresses in today's internet architecture. Afterwards, several performance evaluations are presented that performed on the testbed based on infraHIP implementation of the Host Identity Protocol. Performance results have been obtained and analyzed regarding the Base Exchange, throughput, round trip times and mobility events of Host Identity Protocol.
Security V/S Qos for LTE Authentication and Key Agreement Protocol
Jacques Bou Abdo,Jacques Demerjian,Hakima Chaouchi
International Journal of Network Security & Its Applications , 2012,
Abstract: Protocol and technology convergence, the core of near future communication, will soon be forming theinteroperating heterogeneous networks. Attaining a strict secure authentication without risking the QoSperformance and call success rates is a major concern when it comes to wireless heterogeneousnetworks. In order to achieve this, a generic, fast and secure, Authentication and Key Agreement protocolis to be used; a version of which is to be implemented between each two technologies. In this research,different existing EPS-EPS AKA protocols will be compared with our proposed protocol EC-AKA(Ensure Confidentiality Authentication and Key Agreement) based on security, cost effectiveness,signaling overhead, delay and performance. It is proven that EC-AKA is the exclusive protocol satisfyingthe New Generation Network’s KPIs and it will be promoted as the target generic AKA protocol inheterogeneous networks.
Fractional Frequency Reuse for Hierarchical Resource Allocation in Mobile WiMAX Networks
Ali-Yahiya Tara,Chaouchi Hakima
EURASIP Journal on Wireless Communications and Networking , 2010,
Abstract: We propose a frequency planning based on zone switching diversity scheme for multicell OFDMA mobile WiMAX networks. In our approach, we focus on the use of Fractional Frequency Reuse (FFR) for guaranteeing the quality of service for the different service flows in the system. We investigate an architecture that coordinates the allocation of resources in terms of slots (the basic allocation unit in time and frequency domain in an OFDMA frame) between the Radio Resource Controller (RRC) and the Radio Resource Agent (RRA) which resides in the Base Station (BS). The proposed algorithm attempts to capture three types of diversity, namely, mutual interference diversity, traffic diversity, and selective fading channel diversity. As a consequence, the proposed algorithm for slot allocation makes a trade-off between maximizing overall throughput of the system while guaranteeing the Quality of Service (QoS) requirements for a mixture of real-time and non-real-time service flows under different diversity configurations. Our algorithm is evaluated under various cell configurations and traffic models. The results reveal important insights on the trade-off between cell interference suppression and QoS assurance.
Fractional Frequency Reuse for Hierarchical Resource Allocation in Mobile WiMAX Networks
Tara Ali-Yahiya,Hakima Chaouchi
EURASIP Journal on Wireless Communications and Networking , 2010, DOI: 10.1155/2010/363065
Abstract: We propose a frequency planning based on zone switching diversity scheme for multicell OFDMA mobile WiMAX networks. In our approach, we focus on the use of Fractional Frequency Reuse (FFR) for guaranteeing the quality of service for the different service flows in the system. We investigate an architecture that coordinates the allocation of resources in terms of slots (the basic allocation unit in time and frequency domain in an OFDMA frame) between the Radio Resource Controller (RRC) and the Radio Resource Agent (RRA) which resides in the Base Station (BS). The proposed algorithm attempts to capture three types of diversity, namely, mutual interference diversity, traffic diversity, and selective fading channel diversity. As a consequence, the proposed algorithm for slot allocation makes a trade-off between maximizing overall throughput of the system while guaranteeing the Quality of Service (QoS) requirements for a mixture of real-time and non-real-time service flows under different diversity configurations. Our algorithm is evaluated under various cell configurations and traffic models. The results reveal important insights on the trade-off between cell interference suppression and QoS assurance.
Experimental Measurements of Host Identity Protocol for Mobile Nodes' Networks
Maher Ben Jemaa,Nahla Abid,Maryline Laurent-Maknavicius,Hakima Chaouchi
Journal of Computer Networks and Communications , 2009, DOI: 10.1155/2009/383517
Abstract: The role of Internet Protocol (IP) is becoming more and more problematic especially with the new requirements of mobility and multihoming. Host Identity protocol (HIP) defines a new protocol between the network and transport layers in order to provide a better management to those requirements. The protocol defines a new namespace based on cryptographic identifiers which enable the IP address roles dissociation. Those new identifiers identify hosts rather than IP addresses. Because HIP is a quite recent protocol, we propose to present an experimental evaluation of its basic characteristics.
Semi-linearized compressible Navier-Stokes equations perturbed by noise
Hakima Bessaih
Electronic Journal of Differential Equations , 2003,
Abstract: In this paper, we study semi-linearized compressible barotropic Navier-Stokes equations perturbed by noise in a 2-dimensional domain. We prove the existence and uniqueness of solutions in a class of potential flows.
Optimal control and homogenization in a mixture of fluids separated by a rapidly oscillating interface
Hakima Zoubairi
Electronic Journal of Differential Equations , 2002,
Abstract: We study the limiting behaviour of the solution to optimal control problems in a mathematical mixture of two homogeneous viscous fluids. These fluids are separated by a rapidly oscillating periodic interface with constant amplitude. We show that the limit of the optimal control is the optimal control for the limiting problem
Agent paradigm and services technology for distributed Information Sources
Hakima Mellah
Journal of Systems Integration , 2011,
Abstract: The complexity of information is issued from interacting information sources (IS), and could be better exploited with respect to relevance of information. In distributed IS system, relevant information has a content that is in connection with other contents in information network, and is used for a certain purpose. The highlighting point of the proposed model is to contribute to information system agility according to a three-dimensional view involving the content, the use and the structure. This reflects the relevance of information complexity and effective methodologies through self organized principle to manage the complexity. This contribution is primarily focused on presenting some factors that lead and trigger for self organization in a Service Oriented Architecture (SOA) and how it can be possible to integrate self organization mechanism in the same.
Stochastic incompressible Euler equations in a two-dimensional domain
Hakima Bessaih
Mathematics , 2013,
Abstract: The aim of these notes is to give an overview of the current results about existence and uniqueness of solutions for the stochastic Euler equation driven by a Brownian noise in a two-dimensional bounded domain.
Impedance spectroscopy studies on lead free (Ba0.85Ca0.15)(Ti0.9Zr0.1)O3 ceramics
Ahcène Chaouchi,Sadia Kennour
Processing and Application of Ceramics , 2012,
Abstract: The AC complex impedance spectroscopy technique has been used to obtain the electrical parameters of polycrystalline sample of (Ba0.85Ca0.15)(Ti0.9Zr0.1)O3 in a wide frequency range at different temperatures. This sample was prepared by a high temperature solid-state reaction technique and single phase formation was confirmed by X-ray diffraction technique. This study was carried out by the means of simultaneous analysis of impedance, modulus, and electrical conductivity. The Cole-Cole (Nyquist) plots suggest that the grains and grain boundaries are responsible in the conduction mechanism of the material at high temperature. The ColeCole (Nyquist) plot studies revealed the presence of grain and grain boundary effect at 485 °C. On the other hand, it showed only the presence of grain boundary component of the resistivity at 535 °C. Complex impedance analysis indicated the presence of non-Debye type dielectric relaxation. The bulk resistance of the material decreases with rise in temperature similar to a semiconductor, and the Cole-Cole (Nyquist) plot showed the negative temperature coefficient of resistance (NTCR) character of (Ba0.85Ca0.15)(Ti0.9Zr0.1)O3. The value of activation energy is found to be 0.7433 eV, which suggests that the conduction may be the result of defect and charge carriers present in the materials.
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