Mobile Ad hoc networks (MANETs) are composed of mobile stations communicating through wireless links, without any fixed backbone support. In these networks, limited power energy supply, and frequent topology changes caused by node mobility, makes their routing a challenging problem. TORA is one of the routing protocols that successfully copes with the nodes’ mobility side effects, but it do...

The Internet has evolved to today's complex and heterogeneous critical infrastructure. Structurally, the Internet has hierarchy, composed of interconnected and tiered service provider networks. Furthermore, services are provided at different layers that makes the collective analysis of the Internet very difficult. The primary focus has been on the logical aspects of the topology, since tools ha...

In this paper, we propose a new protocol for efficiently managing large ad hoc networks, i.e., networks in which all nodes can be mobile. We observe that, since nodes in such networks are not necessarily equal in that they may have different resources, not all of them should be involved in basic network operations such as packet forwarding, flooding, etc. In the proposed protocol, a small subse...

Virtual backbone has been proposed as the routing infrastructure to alleviate the broadcasting storm problem in ad hoc networks. Since the nodes in the virtual backbone need to carry other node’s traffic, and node and link failure are inherent in wireless networks, it is desirable that the virtual backbone is fault tolerant. In this paper, we propose a new algorithm called Connecting Dominating...

Energy savings and topology control are inherent tasks of many wireless sensor networks. Sensors are assumed to be randomly deployed and shall organize themselves independently after deployment. Moreover, sensor networks shall operate as long as possible warranting network connectivity. To deal with these tasks we propose the maintenance of a virtual backbone where a fuzzy logic control (FLC) e...

This paper focuses on the self-organization of ad hoc and hybrid networks. We propose to organize networks with two integrated virtual structures: a backbone and clusters. The backbone helps to optimize the flooding of control packets, and to offer a natural prolongation of the backbone of wired networks. Clusters help to hierarchize the network, each of which is managed logically by its cluste...