Titre :	Multicast/geocast routing protocols for safety and comfort applications in VANET
Titre original :	Les protocoles de routage multicast/geocast pour les applications de sécurité et de confort dans les réseaux de véhicules
Type de document :	texte manuscrit
Auteurs :	Fatima Zahra Bousbaa, Auteur ; Mohamed Bachir Yagoubi, Directeur de thèse ; Nasreddine Lagraa, Directeur de thèse
Editeur :	Laghouat : Université Amar Telidji - Département d'informatique
Année de publication :	2020
Importance :	99 p.
Format :	27 cm.
Accompagnement :	1 disque optique numérique (CD-ROM)
Langues :	Anglais
Catégories :	THESES :10 informatique
Mots-clés :	VANET  Group communications  Geocast  Multicast  hybrid  Internal and external network fragmentation problems  RGRP-SA  RGRP-CA  TRBIP  DTRBIP  Road segmentation  Total transmission energy  QoS  Safety and comfort applications
Résumé :	Cooperative Vehicular Ad-hoc NETwork (VANET) has yielded remarkable research results to enable the Intelligent Transportation System (ITS) for a safe, reliable, convenient, and comfortable driving experience. However, the high vehicular mobility and frequent network fragmentation hinder the reliable and successful data communication in cooperative vehicular networks. In this dissertation, we are interested to data communication strategies in cooperative vehicular networks, their common aim is to deliver data to vehicles within a specific group. As the transmission bandwidth is restricted in wireless environments of VANET same as all mobile wireless networks, developing group communications is a very challenging problem due to the aforementioned challenges (i.e., high mobility of vehicles and frequent network fragmentation) together with the transmission range limitation of the Dedicated Short Range Communication (DSRC) devices. Thus, a multi-hop relaying system based on cooperation between vehicles is adopted for the communication of group messages. The multi-hop relaying strategy can extend the transmission range of DSRC devices. However, it also introduces a lot of challenges such as, power consumption and Quality of Service (QoS) requirements (delay, reliability, and scalability). To address the aforementioned issues, we pay specific attention to geocasting and multicasting routing techniques which are the most adapted strategies to multi-hop group communications. In this dissertation, after elaborating an extensive study of group data communication protocols in connected vehicles, we propose two new robust geocast routing protocols: the first one, called Robust Geocast Routing Protocol for Safety Applications (RGRP-SA), is designed for delivering delay-critical short safety packets while taking into account the high mobility of vehicles and the frequent internal network fragmentation, while the second, namely, Robust Geocast Routing Protocol for Comfort Applications (RGRP-CA), is designed to maintain good network connectivity among vehicles along with comfort applications and solve the problem of frequent external network fragmentation. Moreover, in order to reduce transmission interferences for multicast messages in VANET, we propose two new routing protocols. Hence, we develop a heuristic algorithm called Time-Limited Reliable Broadcast Incremental Power (TRBIP) to construct a safety message delivery tree. By reducing the total transmission energy and the number of hops, TRBIP is able to reduce the transmission interference and thus-forth it maximizes the reliability. In the second contribution, we propose a distributed hybrid version of TRBIP called DTRBIP. Our proposal is based on a road segmentation technique through hybrid scheme, DTRBIP is extended to handle both delay-sensitive and delay-tolerant applications respectively in urban and highway environments. The results of the simulation conducted using NS-2 simulator demonstrate the effectiveness of our protocols proposed in this dissertation in terms of solving the internal and external network fragmentation problems, increasing the packet delivery ratio, reducing the total emission energy, the average delay, and the transmission overhead. The simulation validation confirms also the performance advantage of our solutions compared to the up to date protocols in the literature that tackle the same problems.
note de thèses :	Thèse de doctorat en informatique

Multicast/geocast routing protocols for safety and comfort applications in VANET = Les protocoles de routage multicast/geocast pour les applications de sécurité et de confort dans les réseaux de véhicules [texte manuscrit] / Fatima Zahra Bousbaa, Auteur ; Mohamed Bachir Yagoubi, Directeur de thèse ; Nasreddine Lagraa, Directeur de thèse . - Laghouat : Université Amar Telidji - Département d'informatique, 2020 . - 99 p. ; 27 cm. + 1 disque optique numérique (CD-ROM).
Langues : Anglais

Catégories :	THESES :10 informatique
Mots-clés :	VANET  Group communications  Geocast  Multicast  hybrid  Internal and external network fragmentation problems  RGRP-SA  RGRP-CA  TRBIP  DTRBIP  Road segmentation  Total transmission energy  QoS  Safety and comfort applications
Résumé :	Cooperative Vehicular Ad-hoc NETwork (VANET) has yielded remarkable research results to enable the Intelligent Transportation System (ITS) for a safe, reliable, convenient, and comfortable driving experience. However, the high vehicular mobility and frequent network fragmentation hinder the reliable and successful data communication in cooperative vehicular networks. In this dissertation, we are interested to data communication strategies in cooperative vehicular networks, their common aim is to deliver data to vehicles within a specific group. As the transmission bandwidth is restricted in wireless environments of VANET same as all mobile wireless networks, developing group communications is a very challenging problem due to the aforementioned challenges (i.e., high mobility of vehicles and frequent network fragmentation) together with the transmission range limitation of the Dedicated Short Range Communication (DSRC) devices. Thus, a multi-hop relaying system based on cooperation between vehicles is adopted for the communication of group messages. The multi-hop relaying strategy can extend the transmission range of DSRC devices. However, it also introduces a lot of challenges such as, power consumption and Quality of Service (QoS) requirements (delay, reliability, and scalability). To address the aforementioned issues, we pay specific attention to geocasting and multicasting routing techniques which are the most adapted strategies to multi-hop group communications. In this dissertation, after elaborating an extensive study of group data communication protocols in connected vehicles, we propose two new robust geocast routing protocols: the first one, called Robust Geocast Routing Protocol for Safety Applications (RGRP-SA), is designed for delivering delay-critical short safety packets while taking into account the high mobility of vehicles and the frequent internal network fragmentation, while the second, namely, Robust Geocast Routing Protocol for Comfort Applications (RGRP-CA), is designed to maintain good network connectivity among vehicles along with comfort applications and solve the problem of frequent external network fragmentation. Moreover, in order to reduce transmission interferences for multicast messages in VANET, we propose two new routing protocols. Hence, we develop a heuristic algorithm called Time-Limited Reliable Broadcast Incremental Power (TRBIP) to construct a safety message delivery tree. By reducing the total transmission energy and the number of hops, TRBIP is able to reduce the transmission interference and thus-forth it maximizes the reliability. In the second contribution, we propose a distributed hybrid version of TRBIP called DTRBIP. Our proposal is based on a road segmentation technique through hybrid scheme, DTRBIP is extended to handle both delay-sensitive and delay-tolerant applications respectively in urban and highway environments. The results of the simulation conducted using NS-2 simulator demonstrate the effectiveness of our protocols proposed in this dissertation in terms of solving the internal and external network fragmentation problems, increasing the packet delivery ratio, reducing the total emission energy, the average delay, and the transmission overhead. The simulation validation confirms also the performance advantage of our solutions compared to the up to date protocols in the literature that tackle the same problems.
note de thèses :	Thèse de doctorat en informatique