Tarek Bejaoui

Tarek Bejaoui
University of Carthage | UCAR · Département d'Informatique

PhD - University of Paris-Sud XI, France

About

42
Publications
3,181
Reads
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171
Citations
Citations since 2016
3 Research Items
108 Citations
20162017201820192020202120220510152025
20162017201820192020202120220510152025
20162017201820192020202120220510152025
20162017201820192020202120220510152025
Additional affiliations
January 2009 - present
January 2007 - December 2008
January 2005 - present
Institute of Fundamental Electronics
Position
  • Université Paris-Sud, Orsay

Publications

Publications (42)
Article
Full-text available
Toward the growing number of the transport safety applications offered by VANET, a large amount of messages need to be efficiently disseminated between connected vehicles. The requirement for an efficient data dissemination in vehicular environment is ensuring the highest data reachability, using the minimum network resources within a short end to...
Article
Full-text available
Vehicular ad-hoc network (VANET) is becoming a promising technology for improving the efficiency and the safety of intelligent transportation systems by deploying a wide variety of applications. Smart vehicles are expected to continuously exchange a huge amount of data either through safety or non-safety messages dedicated for road safety or infota...
Article
Full-text available
Information dissemination in vehicular networks is becoming a hot topic of research in the field of Vehicle-to-Vehicle (V2V) communications, since efficient data exchange is needed for most crucial applications (road accident warning, traffic congestion warning.). Many protocols have been then proposed for the sake of disseminating information with...
Conference Paper
Inter-vehicle communication or vehicle to vehicle (V2V) communication is becoming a challenging issue for most Vehicular Ad-Hoc Networks (VANETs) applications, where data are needed to be disseminated. In this context, many protocols have been proposed in an attempt to give an efficient dissemination design. In this paper, we propose to review a sp...
Article
Towards satisfying the requirements of International Mobile Telecommunications–Advanced, both the Institute of Electrical and Electronics Engineers (IEEE) and Third Generation Partnership Project (3GPP) introduced revolutionary wireless technologies, exploiting advanced technologies and architectures. Both IEEE's 802.16 (Worldwide Interoperability...
Article
Full-text available
Vehicular ad hoc networks (VANETs) are emerging as new research area and attracting an increasing attention from both industry and research communities. In this context, a dynamic resource allocation policy that maximizes the use of available resources and meets the quality of service (QoS) requirement of constraining applications is proposed. It i...
Conference Paper
In this paper, we address the quality aware routing issue in MANET: Mobile Ad hoc networks. The MANET network is based on dynamic radio links. Our contribution improves the multipath routing in Mobile Ad hoc networks based on the path quality, path stability and QoS awareness. Prediction methods are used in order to estimate the path quality. The p...
Conference Paper
We propose a cross layer approach to achieve greater routing performance for applications with real time constraints in Mobile Ad Hoc Networks. Interactions between MAC, Network and Application layers are fully exploited to get accurate information about the end-to-end path quality, and the applications’ characteristics. The improvements provided b...
Conference Paper
Nowadays, the LTE and WiFi networks are set to dominate the outdoor and indoor spaces. To enlarge the coverage of WiFi hotspots, a WMN: Wireless Mesh Network called IEEE 802.11s was defined. In this paper, we aim to enhance the interworking performance between LTE and 802.11s network by handling the QoS in IEEE 802.11s network. In this context, we...
Conference Paper
In wireless networks, prediction methods are considered as efficient techniques to get information about the network capacity and availability. Delay and packet loss are two key QoS parameters for real time applications. Conventional MAC layer functions can only predict the link characteristics. In our paper, a cross layer design is deployed to get...
Article
Relaying technology is likely to bring real progress to the next generation cellular networks due to its capability of boosting the system capacity and coverage. However, despite recent advances in relay deployment, some challenging problems still remain such as radio resource allocation and relay selection. The authors investigate both relay selec...
Conference Paper
Nowadays, a new paradigm is emerging: the challenging integration of Peer-to-Peer into mobile Ad hoc networks (MANETs). In this context, this paper proposes to combine two Chord extensions for MANETs. Its main objective is to reduce the lookup failures. Simulation results indicate that the proposed scheme has an improved performance in comparison w...
Conference Paper
In this paper, we propose a combined fair packet scheduling and vehicle density-based call admission control policy that provides throughput guarantee, for vehicular ad hoc networks (VANETs). It takes into account a realistic behaviour of traffic while considering the spatial variation of the system characterizing both the vehicle mobility and the...
Conference Paper
Nowadays, a new paradigm is emerging: the challenging integration of Peer-to-Peer into mobile Ad hoc networks (MANETs). In this context, this paper proposes a new distributed lookup protocol for mobile P2P networks. Its main objective is to reduce the overhead traffic and the lookup delay. Simulation results indicate that the proposed scheme has an...
Chapter
Major research challenges in the next generation of wireless networks include the provisioning of worldwide seamless mobility across heterogeneous wireless networks, the improvement of end-to-end Quality of Service (QoS), supporting multmedia services over wide area and enabling users to specify their personal preferences. The integration and inter...
Chapter
This chapter introduces the cross layer design for resource allocation over multimedia wireless networks. Conventional layered packet scheduling and call admission control schemes are presented and a number of cross-layered protocols that are recently proposed are investigated. The chapter highlights the QoS improvement and the performance gain obt...
Conference Paper
Full-text available
In this paper we evaluate the handoff performance of an UMTS network with underlying tunnel-WLANs at the cell periphery while developing an adaptive QoS oriented CAC function, proposed to limit the occurrence of hard IEEE 802.11 WLAN-UMTS handovers to mobiles using real time applications. The proposed protocol is hybrid and based on the service cla...
Article
Next generation wireless networks (NGWNs) will utilize several different radio access technologies, seamlessly integrated to form one access network. This network has the potential to provide many of the requirements that other previous systems did not achieve such as high data transfer rates, effectives user control, seamless mobility, and others...
Conference Paper
Full-text available
This work presents a new adaptive QoS oriented CAC scheme, proposed to limit the occurrence of hard IEEE 802.11 WLAN-UMTS handovers to mobiles using real time applications. This scheme is hybrid, based on the service class differentiation, the location in the heterogeneous infrastructure and a vertical handoff decision function as well. The results...
Chapter
Major research challenges in the next generation of wireless networks include the provisioning of worldwide seamless mobility across heterogeneous wireless networks, the improvement of end-to-end Quality of Service (QoS), supporting multmedia services over wide area and enabling users to specify their personal preferences. The integration and inter...
Chapter
This chapter introduces the cross layer design for resource allocation over multimedia wireless networks. Conventional layered packet scheduling and call admission control schemes are presented and a number of cross-layered protocols that are recently proposed are investigated. The chapter highlights the QoS improvement and the performance gain obt...
Conference Paper
In this paper we propose a handover and class-based Call Admission Control algorithm for UMTS/WLAN heterogeneous networks. Its main objective is to limit the occurrence of hard WLAN-UMTS handovers to mobile nodes moving across cells and using real time applications. Our mechanism is based on the service class differentiation, the call origination p...
Conference Paper
High-Speed Downlink Packet Access (HSDPA) is an emerging wireless cellular-based system that promises a peak data rate of up to 14 Mbps. HSDPA relies on new technologies that make it possible to achieve such high data rate. These new technologies include: adaptive modulation and coding, hybrid automatic repeat request, fast cell selection and fast...
Article
In reconfiguration process, dynamic service deployment needs to find at anytime the best way to lead data from source to destination. In this paper, we propose an optimization approach for routing in mobile radio networks. Three main algorithms are proposed. At first, a genetic algorithm based approach is used to find an optimal way in sub-network,...
Conference Paper
Full-text available
In this paper, we propose a new packet scheduling algorithm, based on the CBQ scheduling policy combined to a Dynamic Priority Function which considers the realistic behavior of traffic. CBQ, based on service class differentiation, aims at maximizing the use of available radio resource and meeting the QoS requirement of higher priority users as muc...
Article
In this paper, we propose a combined multi-class adaptive connection admission control algorithm and a new fair packet scheduling policy, based on an enhanced weighted fair queuing algorithm. It takes into account a realistic behaviour of traffic while considering the spatial variation of the system characterizing both the user mobility and the sig...
Conference Paper
Next generation wireless cellular networks aim to provide guaranteed Quality of Service (QoS) for multimedia applications. However, bandwidth is an extremely scarce resource in such networks that required an efficient and effective management to enhance the network performance and provide better services for mobile users. In this paper, we propose...
Conference Paper
In this paper, we propose a combined fair packet scheduling policy and an adaptive connection admission control algorithm, to meet the rapidly increasing demand for providing multimedia services with diversified quality requirements. The new scheduling policy is based on an enhanced weighted fair queuing algorithm, while taking into account the spa...
Article
Full-text available
In this paper, an adaptive Call Admission Control (CAC) algorithm is proposed for UMTS mobile networks. This function limits the amount of traffic accepted in the network in order to provide better service to accepted connections. It decides whether the connection request is to be admitted into the system based on service class differentiation and...
Conference Paper
Full-text available
In this paper, an adaptive QoS oriented CAC function is proposed to meet the rapidly increasing demand for providing multimedia services with diversified quality requirements. It decides whether the connection request is to be admitted into the system based on the interference level and the waiting time before access. This CAC scheme, based on serv...
Article
Full-text available
Our paper introduces a new efficient resource allocation algorithm, based on a priority function considering the precedence class, the waiting time in the BSC buffer, the QoS historic evolution and the communication quality of each mobile station. The results have been obtained for GPRS context, and the evaluation of our new allocation scheme is ca...
Conference Paper
Full-text available
The paper introduces a GPRS-like cellular network simulator, where mobile terminals move, initiate and terminate their communications. This tool aims at evaluating the major QoS parameters in realistic propagation conditions and for different resource allocation policies. Our objectives in developing such a simulator are to use it first to compare...
Article
Full-text available
Résumé: Dans les réseaux GSM/GPRS, des services orientés circuits et paquets sont supportés par l'interface radio et le sous-système réseau. Tout comme les services UMTS, les services GPRS introduisent différents profils de qualité de service. Dans ce contexte, les canaux radio agissent comme le goulet d'étranglement du réseau et une attention part...
Article
Full-text available
Our paper introduces a cellular network simulator, where mobile terminals move, initiate or terminate their communications. In this simulator, the mobility of users and the resources allocation are considered. Its aim is to evaluate a lot of QoS parameters in realistic propagation conditions, for different resource allocation policies. Our objectiv...

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Projects

Project (1)
Archived project
Propose efficient safety message dissemination protocols