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Cognitive radio networks that employ the dispersed spectrum utilization as spectrum access method are called dispersed spectrum cognitive radio networks. In this paper, we derive the effective transport capacity of adhoc dispersed spectrum cognitive radio networks in which the nodes are distributed in three dimensional (3D) configurations. The analysis is performed considering a cubic grid distribution...
Currently, in any MANET, one protocol routes packets to their destination regardless of the network context. This `one size fits all' approach is far from optimum. Therefore, in this paper, we introduce an Intelligent MANet routing protocol system (IMAN), which employs Genetic Algorithms to select the most optimum protocol based on the network context. Comprehensive performance models of three MANET...
Mobile terminals interested in the same content and that are in the vicinity of each other can cooperate to improve the efficiency of the download process. In this paper, content distribution and cooperation among the mobile terminals is coordinated by the base station which is the centralized entity that runs an optimization framework to minimize energy consumption at mobile terminals while guaranteeing...
Mesh technology has captured the interest of university research and industry, because of its capacity to meet at the same time the requirements of suppliers of wireless access to Internet and of users. But, the architecture and the configuration of this type of network do not ensure a protection against the unauthorized use of the network since the basic security measures used do not include the...
Vehicular Ad hoc Networks appeared as a natural result of the evolution of the communication technology, which becomes able to satisfy the need of users to be connected anytime and anywhere. Providing comfort services such as Internet access or even vehicle traffic monitoring requires the use of road-side units (RSU) as gateways to the requested resources. Today, most of Intelligent Transport Systems...
Population protocols provide theoretical foundations for mobile tiny device networks in which global behavior emerges from a set of simple interactions between anonymous agents. The works in this area mostly focus on studying the computational power of the model. Results hold as long as a fair scheduler, which governs the interactions between nodes, ensures that all reachable system states may eventually...
In this paper we propose a connectivity index that allows each node to estimate how well it is connected to the rest of the network. We use this index to select the supernodes (SNs) that create a P2P overlay over ad hoc network. We show that applying this index to select the SNs, despite its simplicity, leads to a high robustness in the overlay network and decrease the overlay disconnection probability...
Mobile ad hoc networks are a set of wireless mobile devices that communicate without fixed infrastructure, forming temporary networks dynamically. Each node in such a network is more than a data receiver/sender, it is also a router that forwards data packets to its proper destination. The main characteristics of ad hoc networks are frequent change in the network topology, limited power of its links...
During last two decades, Mobile Ad hoc Networks (MANETs) has been in widespread use. However, in some critical applications such as in battlefield or area sensing, due to the node mobility, limited power and sparse deployment density, MANETs may suffer network partitioning. Without a stable end to end path, these challenged scenarios could cause most existing ad hoc networks protocols to fail. In...
Wireless backhaul has been received much attention as an enabler of future broadband mobile communication systems because it can reduce deployment cost of pico-cells, an essential part of high capacity system. A high performance network in terms of high throughput, low average delay and low packet loss rate, is highly appreciated to sustain the increasing proliferation in multimedia transmissions...
Vehicular ad hoc networks, also known as VANETs, enable vehicles which are not necessarily within the same radio transmission range to communicate with each other. In addition to allowing direct communication between vehicles, VANETs also enable vehicles to connect to Roadside Units (RSUs) which are inexpensive infrastructure that have the capability of communicating with each others and with passing...
Researchers have suggested Vehicular Ad hoc Networks as a way to enable car to car communications and to allow for the exchange of safety and other types of information among cars. The Wireless Access in Vehicular Environments (WAVE) protocol stack is standardized by the IEEE, and it allocates spectrum for vehicular communication. In our work we prove that it does not provide sufficient spectrum for...
This paper proposes a novel approach for node localization with applications in mobile ad-hoc networks. The network consists of base nodes and target nodes. Base nodes equipped with antenna arrays are capable of localizing target nodes independently via integrated time-of-arrival (TOA) and direction-of-arrival (DOA) estimation. In addition, base nodes cooperate to improve the localization accuracy...
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