Vehicular ad hoc networks have been attracting the interest of both academic and industrial communities on account of their potential role in Intelligent Transportation Systems (ITS). However, due to vehicle movement and fading in wireless communications, providing a reliable and efficient multi-hop broadcast service in vehicular ad hoc networks is still an open research topic. In this paper, w...

In multi-hop wireless networks, data packets are relayed in several wireless hops from their source to their destination. Based on whether a fixed infrastructure is used or not, we can distinguish two types of multi-hop wireless networks: pure ad hoc and multi-hop cellular networks. Pure ad hoc networks do not rely on any fixed infrastructure; hence, the packet relaying service has to be provid...

Group key agreement protocols for wired networks are not applicable in ad hoc networks because of the 1-hop assumption of these protocols and the dynamic, multi-hop attributes of ad hoc networks. An authenticated group key agreement for ad hoc networks is proposed which arranges the group members in a cluster-based hierarchical spanning tree structure. The scheme uses Intra-cluster group key ag...

A wireless ad hoc network is a collection of radio devices (transceivers) located in a geographic region. Each node is equipped with an omnidirectional antenna and has limited transmission power. A communication session is established either through a single-hop radio transmission if the communication parties are close enough, or through relaying by intermediate devices otherwise. For this reas...

Ad hoc networks have gained place in the research area recently. There are many researches regarding different topics related to such networks, such as routing, media access control, security, scalability, and many others. There are two usual methods to test and evaluate the performance of ad hoc networks: simulations and real test-bed. A network emulator is a tradeoff between pure simulation a...

Mobile ad hoc networks are wireless multi-hop networks with a completely distributed organization. The dynamic nature of these networks imposes many challenges on mobile ad hoc routing protocols. Current routing protocols do not take into the account the network context and therefore their performance is only optimal under certain network conditions. This paper proposes a novel concept for rout...

Adaptive Routing for Group Communications in Multi-Hop Ad-hoc Networks

A mobile ad-hoc network (MANET), a set of wirelessly connected sensor nodes, is a dynamic system that executes hop-by-hop routing independently with no external help of any infrastructure. Proper selection of cluster heads can increase the life time of the Ad-hoc network by decreasing the energy consumption. Although different methods have been successfully proposed by researchers to tackle...