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The problem of managing the scarce radio spectrum resource is addressed in this paper; based upon the Worldwide Interoperability for Microwave Access (WiMAX) network. Emerging and innovative techniques such as spectrum virtualization and network federation are adopted to enable the sharing of spectrum amongst mobile operators. A novel entity known as the Virtual Spectrum Hypervisor (VS-Hypervisor)...
This paper presents a framework for mapping the value-iteration and related successive approximation methods for Markov Decision Problems onto Hopfield neural networks, for both discounted and undiscounted versions of the finite state and action spaces. We analyse the asymptotic behaviour of the control sets and we give some estimates on the convergence rate for the value-iteration scheme. We relate...
Summary In this paper, we describe an information control and coding framework devoted to reconfiguration processes based on a modified perspective on the Shannon information where the information flows are regarded as network commodities. This interpretation is suitable for independent multipoint-to-multipoint channels in group communication, such as the multiple-access or broadcast channels, and...
Green communication has recorded much attention in industry, academia and government. It has been recorded that information communication and technology nodes consume roughly 3% of the world-wide energy supply and are responsible for 2% of the global carbon dioxide (CO2) emission. As a result, researchers have devoted huge attention to prevent its growth. In order to address this problem we studied...
Performance of cooperative networks have been evaluated using metrics such as bit error rate (BER) and signal-to-ratio (SNR), which are only suitable for measuring the effectiveness of the relay strategies. In this paper, system model that is based on data envelopment analysis method is designed to evaluate the efficiency of cooperative relays. The performances of amplify-and-forward, decode-and-forward,...
The paper studies the problem of minimum-cost multicast connections over coded packet networks and introduces a new technique for evaluating the performance of wireless network by exploring data envelopment analysis tool. It also explores the use of network coding in wireless multicast and investigates its cost effectiveness and efficiency. Earlier work on multicast connections focuses largely on...
Performance of network coding protocols have been largely evaluated using metrics such as packet delivery ratio and routing load, which can only determined how effective a protocol is. We describe the process of routing information in wireless network based on network coding and evaluate the efficiency of throughput benefits that network coding offers. This is archived with a specialized method known...
Multicast can be described as the process of routing information from a source node s to a set of receivers r1, r2 rn. In this paper, we present the performance of multicast algorithms in wireless networks. A network coding (NC) algorithm, which is the proposed optimised model, and efficient for multicast networks is considered. This model is implemented for wireless networks and the simulation results...
The advancement of technology towards Next Generation Networks (NGNs) has promised the mobile network a very high speed connection with increase in network resources and support heterogeneity (manifested by the presence of different access networks). This will no doubt enhance global roaming, mobility, scalability and performance of the entire network as users of mobile devices will have unrestricted...
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