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Actualités de l'école

21/02/2017

Doctorate thesis defense of Mouna Garai




Doctorate thesis defense on February 21th 2017 at 14H00 AM ,in Amphi I, Sup’Com.


Entitled :Architectural Issues in Providing Security and QoS in Vehicular Ad-hoc Networks

Presented by :  Mouna Garai 





Committee


Chair

Mr. Riadh Abdelfettah

Professor, School of Communication Engineering of Tunis, SUP’Com, Tunisia

 

 

 

Examiners :

Mr. Faouzi Zarai

Associate Professor, National School of Electronics and Telecommunications, ENET’Com, Tunisia

 

Mr. Mustapha Benjillali

Associate Professor, National Institute of Posts and Telecommunications, INPT, Morocco

 

Member :

Slim REKHIS

Associate Professor, School of Communication Engineering of Tunis, SUP’Com, Tunisia

 

Thesis Director :

Mr. Noureddine Boudriga

Professor, School of Communication Engineering of Tunis, SUP’Com, Tunisia

 

Abstract


In the last years, important developments in Vehicular Ad-hoc Networks (VANets) have contributed to the release of various services for intelligent transportation systems. In this context, coping with the high mobility and number of vehicles, handling the scarcity of wireless resources, providing seamless connectivity to vehicles, and guaranteeing security and high quality of service (QoS), is among the main challenges to address. This thesis takes interest to security and quality of service provision in VANETs. Four contributions are achieved.


The first contribution consists in providing novel communication architecture for QoS provision in VANets. In this architecture, the connected vehicles are organized into a tree-based topology to maximize the network coverage, make the global topology less varying, and provide rapid and seamless data connectivity to vehicles, while taking into consideration the different QoS requirements made by applications. The use of a tree-based topology allows extending the network coverage beyond the area covered by the road side units, and hence enabling the operator to reduce the cost associated to the deployment of VANETs.


The second contribution is related to QoS provision and resources management in Cloud VANets. We propose a three-layer based Cloud VANet architecture providing Communication As A Service to mobile vehicles. The aim is to: a) provide a continuous communication to vehicles located beyond the area uncovered by Roadside units; b) guarantee the QoS in terms of delay, throughput and packet loss rate; and c) cope with resources limitation in vehicular networks. Techniques for handover management over the Cloud VANet are also proposed.


The third contribution consists in developing a secure and quality-of-service aware authentication and access control scheme for VANets and Cloud-VANets. A digital certificate-based vehicle privacy and authentication protocol is provided, which also prevents vehicles against tracking and Sybil attacks.


In the last contribution, we propose a hybrid QoS oriented VLC-based VANET architecture integrating Visible Light Communication. Moreover, a codeword-based node communication protocol is proposed to provide the optical switching of traffic from a vehicle node to another.


Keywords


Vehicular Ad-Hoc networks, Quality of Services, mobility management, QoS management, tree-based topology, routing protocols, value added services, security, and vehicles’ privacy.